chore: update version to 1.7.1

Parallelize ICS parse with raw blob fetch, render the banner as soon
as parsing returns instead of awaiting the existing-event lookup, and
filter that lookup by UID server-side instead of fetching every event
on the calendar.

.dockerignore

@@ -5,9 +5,7 @@ node_modules
 .env*
 !.env.example
 !.env.dev.example
-.claude/
 scripts/
 TODO.md
-CLAUDE.md
 *.md
 !README.md

.env.dev.example

@@ -1,11 +1,11 @@
-# Bulwark Webmail — Development Configuration
+# Bulwark Webmail - Development Configuration
 # Copy this file to .env.local to run with the built-in mock JMAP server.
-# No external mail server required — great for UI development and testing.
+# No external mail server required - great for UI development and testing.
 #
 # Usage:
 #   cp .env.dev.example .env.local
 #   npm run dev
-#   Open http://localhost:3000 — log in with any username/password.
+#   Open http://localhost:3000 - log in with any username/password.
 
 # =============================================================================
 # Mock JMAP Server

.env.example

@@ -1,4 +1,4 @@
-# Bulwark Webmail — Production Configuration
+# Bulwark Webmail - Production Configuration
 # Copy this file to .env.local and fill in your values.
 # For development with the built-in mock server, see .env.dev.example instead.
 
@@ -6,12 +6,19 @@
 # JMAP Server (required)
 # =============================================================================
 
-# App name displayed in the UI
+# App name displayed in the UI, browser tab title, and PWA manifest.
 APP_NAME=Bulwark Webmail
 
-# URL of your JMAP-compatible mail server (required)
+# URL of your JMAP-compatible mail server (required unless ALLOW_CUSTOM_JMAP_ENDPOINT is set)
 JMAP_SERVER_URL=https://your-jmap-server.com
 
+# Allow users to specify a custom JMAP server URL on the login form.
+# When enabled, a "JMAP Server" field appears on the login page.
+# Users can connect to any JMAP-compatible server.
+# NOTE: External JMAP servers must include this domain in their CORS
+# Access-Control-Allow-Origin header, or browser requests will be blocked.
+# ALLOW_CUSTOM_JMAP_ENDPOINT=true
+
 # =============================================================================
 # Stalwart Mail Server Integration
 # =============================================================================
@@ -20,11 +27,6 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 # Set to "false" to disable if using a non-Stalwart JMAP server.
 # STALWART_FEATURES=true
 
-# If your reverse proxy doesn't forward Stalwart management API paths
-# (/api/account/*, /api/principal/*), set this to the URL where Stalwart's
-# HTTP listener is directly reachable. Defaults to JMAP_SERVER_URL if not set.
-# STALWART_API_URL=https://admin.example.com
-
 # =============================================================================
 # OAuth / OpenID Connect (optional)
 # =============================================================================
@@ -41,6 +43,8 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 
 # OAuth client secret (server-side only, never exposed to the browser)
 # OAUTH_CLIENT_SECRET=your-client-secret
+# Alternatively, you can specify the path to a file containing the OAuth client secret.
+# OAUTH_CLIENT_SECRET_FILE=/oauth-client-secret
 
 # OpenID Connect issuer URL for discovery
 # OAUTH_ISSUER_URL=https://your-idp.example.com
@@ -53,6 +57,8 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 # Required for both "Remember me" and settings sync features.
 # Generate with: openssl rand -base64 32
 # SESSION_SECRET=your-secret-key-here
+# Alternatively, you can specify the path to a file containing the session secret.
+# SESSION_SECRET_FILE=/session-secret
 
 # =============================================================================
 # Settings Sync
@@ -64,9 +70,54 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 # SETTINGS_SYNC_ENABLED=true
 
 # Directory for storing encrypted settings files (default: ./data/settings).
-# For Docker, mount a persistent volume at this path.
+# For Docker, the working directory is /app, so the default resolves to
+# /app/data/settings - mount a persistent volume there (see docker-compose.yml).
 # SETTINGS_DATA_DIR=./data/settings
 
+# =============================================================================
+# Admin Dashboard Data
+# =============================================================================
+
+# Admin data is split across two directories so the config volume can be
+# mounted read-only after the setup wizard completes (see issue #226).
+#
+# Config dir - operator-authored state. Holds config.json, policy.json,
+# admin.json (passwordHash only), plugin-config/, plugins/, themes/, and
+# branding uploads. Safe to mount read-only after setup.
+# Default: ./data/admin (or ADMIN_DATA_DIR if that legacy variable is set)
+# ADMIN_CONFIG_DIR=./data/admin
+#
+# State dir - runtime mutations. Holds admin-state.json (login timestamps),
+# audit.log, and the bootstrap setup token. Always read-write.
+# Default: ./data/admin-state (or ADMIN_DATA_DIR/state when ADMIN_DATA_DIR
+#          is set, for back-compat with single-volume installs)
+# ADMIN_STATE_DIR=./data/admin-state
+#
+# Set to "true" to enforce read-only mode at the application layer (cleaner
+# error than a mid-request EROFS). Pair with `:ro` on the config-volume mount.
+# ADMIN_CONFIG_READONLY=true
+#
+# Legacy: a single dir containing both config and state. Honoured if neither
+# of the split variables is set. New installs should use the split vars.
+# ADMIN_DATA_DIR=./data/admin
+
+# =============================================================================
+# Anonymous Telemetry
+# =============================================================================
+
+# Anonymous instance telemetry is enabled by default. Heartbeats contain no PII:
+# version, platform, bucketed account counts, and feature toggles only. See
+# https://bulwarkmail.org/docs/legal/privacy/telemetry for the full schema.
+#
+# Disable telemetry entirely (overrides the admin UI):
+# BULWARK_TELEMETRY=off
+
+# Directory for telemetry state: instance id, consent, login HMACs
+# (default: ./data/telemetry). For Docker, the default resolves to
+# /app/data/telemetry - mount a persistent volume there (see docker-compose.yml)
+# so the instance id and consent choice survive upgrades.
+# TELEMETRY_DATA_DIR=./data/telemetry
+
 # =============================================================================
 # Server Listen Address
 # =============================================================================
@@ -92,43 +143,92 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 # Branding (all optional)
 # =============================================================================
 
-# Custom favicon for the browser tab.
+# ---------------------------------------------------------------------------
+# App identity
+# ---------------------------------------------------------------------------
+
+# Short name for the app, used in contexts where space is limited
+# (e.g. home screen label on mobile). Defaults to APP_NAME if not set.
+# APP_SHORT_NAME=Bulwark
+
+# Description shown in the PWA manifest (displayed by the OS during install).
+# Defaults to a generic Bulwark description if not set.
+# APP_DESCRIPTION=Your personal webmail
+
+# ---------------------------------------------------------------------------
+# Icons & favicon
+# ---------------------------------------------------------------------------
+
+# Custom favicon shown in the browser tab.
 # Supported formats: SVG (recommended), PNG, ICO.
-# Recommended size: 32×32px minimum, 512×512px maximum (or SVG for best scaling).
-# Can be an absolute URL or a path relative to the public/ directory.
+# Can be an absolute URL (https://...) or a path relative to the public/ directory.
 # Defaults to the Bulwark favicon if not set.
 # FAVICON_URL=/branding/my-favicon.svg
 
-# Custom logos for the sidebar (shown in the main app after login).
+# Source image used to auto-generate PWA icons (192×192 and 512×512 PNG).
+# Supported formats: SVG (recommended for best quality) or PNG (≥512×512px recommended).
+# Can be an absolute URL (https://...) or a path relative to the public/ directory.
+# Falls back to FAVICON_URL if not set, and to the default Bulwark icons if neither is set.
+# PWA_ICON_URL=/branding/my-icon.svg
+
+# ---------------------------------------------------------------------------
+# PWA appearance
+# ---------------------------------------------------------------------------
+
+# Color applied to the browser UI chrome when the app is installed as a PWA
+# (address bar, status bar on Android). Default: #ffffff
+# PWA_THEME_COLOR=#3b82f6
+
+# Background color shown on the PWA splash screen while the app is loading.
+# Should match your app's main background color. Default: #ffffff
+# PWA_BACKGROUND_COLOR=#ffffff
+
+# ---------------------------------------------------------------------------
+# Logos
+# ---------------------------------------------------------------------------
+
+# Logos shown in the sidebar (main app, after login).
 # Supported formats: SVG (recommended), PNG, WebP.
-# Recommended size: min 24×24px, max 128×128px
+# Recommended size: min 24×24px, max 128×128px.
 # Can be absolute URLs or paths relative to the public/ directory.
 # If not set, no logo is shown in the sidebar.
 # APP_LOGO_LIGHT_URL=/branding/my-logo-color.svg
 # APP_LOGO_DARK_URL=/branding/my-logo-white.svg
 
-# Custom logo images for the login page.
+# Logos shown on the login page.
 # Supported formats: SVG (recommended), PNG, WebP.
-# Recommended size: min 32×32px, max 512×512px
+# Recommended size: min 32×32px, max 512×512px.
 # Can be absolute URLs or paths relative to the public/ directory.
-# Light mode logo (shown on light backgrounds), defaults to Bulwark logo.
+# Light mode logo (shown on light backgrounds). Defaults to the Bulwark logo.
 LOGIN_LOGO_LIGHT_URL=/branding/Bulwark_Logo_Color.svg
-#
-# Dark mode logo (shown on dark backgrounds), defaults to Bulwark white logo.
+# Dark mode logo (shown on dark backgrounds). Defaults to the Bulwark white logo.
 LOGIN_LOGO_DARK_URL=/branding/Bulwark_Logo_Color.svg
 
-# Company or organization name displayed above the version on the login page
+# ---------------------------------------------------------------------------
+# Login page
+# ---------------------------------------------------------------------------
+
+# Company name shown above the version number on the login page.
 LOGIN_COMPANY_NAME=Bulwark Webmail
 
-# URL for the imprint/legal notice link on the login page
+# URL for the imprint / legal notice link on the login page.
 # LOGIN_IMPRINT_URL=https://example.com/imprint
 
-# URL for the privacy policy link on the login page
+# URL for the privacy policy link on the login page.
 # LOGIN_PRIVACY_POLICY_URL=https://example.com/privacy
 
-# URL for the company website link on the login page
+# URL for the company website link on the login page.
 LOGIN_WEBSITE_URL=https://bulwarkmail.org
 
+# =============================================================================
+# Extension Directory / Marketplace
+# =============================================================================
+
+# URL of the BulwarkMail extension directory for the admin marketplace.
+# Defaults to https://extensions.bulwarkmail.org. Override only if you run
+# your own directory (e.g. http://localhost:3001 for local development).
+# EXTENSION_DIRECTORY_URL=https://extensions.bulwarkmail.org
+
 # =============================================================================
 # Legacy Build-time Variables (still supported as fallback)
 # =============================================================================

.github/FUNDING.yml

@@ -0,0 +1,4 @@
+# Bulwark Webmail – Funding configuration
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/displaying-a-sponsor-button-in-your-repository
+
+github: [bulwarkmail]

.github/workflows/docker-publish-releases.yml

@@ -0,0 +1,120 @@
+name: Publish Docker Image on Release
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+
+env:
+  IMAGE_NAME: ghcr.io/${{ github.repository }}
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-latest
+          - platform: linux/arm64
+            runner: ubuntu-24.04-arm
+    runs-on: ${{ matrix.runner }}
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_NAME }}
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            GIT_COMMIT=${{ github.sha }}
+          outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=${{ matrix.platform }}
+          cache-to: type=gha,mode=max,scope=${{ matrix.platform }}
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs: build
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest
+            type=semver,pattern=v{{version}}
+            type=semver,pattern={{version}}
+            type=semver,pattern=v{{major}}.{{minor}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern=v{{major}}
+            type=semver,pattern={{major}}
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.IMAGE_NAME }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}

.github/workflows/docker-publish.yml

@@ -2,7 +2,9 @@ name: Publish Docker Image
 
 on:
   push:
-    branches: [main]
+    branches:
+      - main
+      - dev
     paths:
       - "Dockerfile"
       - ".dockerignore"
@@ -17,12 +19,34 @@ on:
       - "package.json"
       - "package-lock.json"
       - ".github/workflows/docker-publish.yml"
-    tags: ["v*.*.*"]
   workflow_dispatch:
 
 jobs:
-  build-and-push:
+  prepare:
     runs-on: ubuntu-latest
+    outputs:
+      image_name: ${{ steps.set.outputs.image_name }}
+    steps:
+      - name: Set image name
+        id: set
+        run: |
+          if [ "${{ github.ref_name }}" = "main" ]; then
+            echo "image_name=ghcr.io/${{ github.repository }}-beta" >> $GITHUB_OUTPUT
+          else
+            echo "image_name=ghcr.io/${{ github.repository }}-${{ github.ref_name }}" >> $GITHUB_OUTPUT
+          fi
+
+  build:
+    needs: prepare
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-latest
+          - platform: linux/arm64
+            runner: ubuntu-24.04-arm
+    runs-on: ${{ matrix.runner }}
     permissions:
       contents: read
       packages: write
@@ -31,9 +55,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -48,21 +69,75 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: |
-            ghcr.io/${{ github.repository }}
-          tags: |
-            type=raw,value=latest,enable={{is_default_branch}}
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=sha,prefix=
+          images: ${{ needs.prepare.outputs.image_name }}
 
-      - name: Build and push
+      - name: Build and push by digest
+        id: build
         uses: docker/build-push-action@v6
         with:
           context: .
-          platforms: linux/amd64,linux/arm64
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
+          platforms: ${{ matrix.platform }}
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          build-args: |
+            GIT_COMMIT=${{ github.sha }}
+          outputs: type=image,name=${{ needs.prepare.outputs.image_name }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=${{ matrix.platform }}
+          cache-to: type=gha,mode=max,scope=${{ matrix.platform }}
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs: [prepare, build]
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ needs.prepare.outputs.image_name }}
+          tags: |
+            type=raw,value=latest
+            type=sha
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ needs.prepare.outputs.image_name }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ needs.prepare.outputs.image_name }}:${{ steps.meta.outputs.version }}

.github/workflows/standalone-release.yml

@@ -0,0 +1,68 @@
+name: Publish Standalone Tarball on Release
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            arch: amd64
+          - os: ubuntu-24.04-arm
+            arch: arm64
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build standalone
+        run: npm run build
+
+      - name: Package tarball
+        env:
+          REF_NAME: ${{ github.ref_name }}
+          ARCH: ${{ matrix.arch }}
+        run: |
+          VERSION="${REF_NAME#v}"
+          TARBALL="bulwark-standalone-${VERSION}-linux-${ARCH}.tar.gz"
+
+          mkdir -p bulwark-standalone
+          cp -r .next/standalone/. bulwark-standalone/
+          cp -r .next/static bulwark-standalone/.next/static
+          cp -r public bulwark-standalone/public
+
+          tar -czf "$TARBALL" bulwark-standalone/
+          echo "TARBALL=$TARBALL" >> "$GITHUB_ENV"
+
+      - name: Upload release asset
+        if: github.event_name == 'release'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAG_NAME: ${{ github.event.release.tag_name }}
+        run: gh release upload "$TAG_NAME" "$TARBALL" --clobber
+
+      - name: Upload artifact (workflow_dispatch)
+        if: github.event_name == 'workflow_dispatch'
+        uses: actions/upload-artifact@v4
+        with:
+          name: standalone-${{ matrix.arch }}
+          path: ${{ env.TARBALL }}
+          retention-days: 7

.gitignore

@@ -42,11 +42,11 @@ yarn-error.log*
 *.tsbuildinfo
 next-env.d.ts
 
-# claude code
-.claude/
-
 # settings sync data
 /data/
 
 # Local private data
-/local-data/
+/local-data/
+
+# Sibling repos
+/repos/

.husky/commit-msg

@@ -1,7 +0,0 @@
-# Check for AI attribution in commit message
-if grep -qi "co-authored-by.*claude\|co-authored-by.*anthropic\|claude code\|claude sonnet\|claude opus" "$1"; then
-  echo "❌ ERROR: Commit message contains AI attribution (Claude/Anthropic)"
-  echo "   This violates project policy in CLAUDE.md"
-  echo "   Remove 'Co-Authored-By: Claude' and similar references"
-  exit 1
-fi

CHANGELOG.md

@@ -1,5 +1,767 @@
 # Changelog
 
+## 1.7.1 (2026-05-22)
+
+### Features
+
+- **Admin**: Expose PWA branding fields in the admin Branding tab
+- **Pro**: Hide empty-state placeholder and collapse the viewer pane in Pro mode so the mail list fills the space
+
+### Fixes
+
+- **Mail**: Preserve inline images when replying (#163)
+- **Filters**: Use the canonical `INBOX` mailbox in Sieve filter paths (#313)
+- **Mail**: Resolve destination account id to the local namespace on cross-account mailbox drop
+
+## 1.7.0 (2026-05-21)
+
+> **New: Pro mode (experimental).** Opt-in tabbed multi-pane interface for power users. Open multiple mail, calendar, contacts, and file views side-by-side, drag tabs to reorder or split panes at the edges, and work across all logged-in accounts in one shell - cross-account email moves, a unified inbox with search, account-split calendar/contacts/files sidebars, and a per-account "From" dropdown in the composer. Enable from Settings → Appearance; the `proInterface` preference is per-device and not synced.
+
+### Breaking Changes
+
+- **Plugins**: Plugins now run inside a null-origin iframe sandbox and talk to the host over a postMessage RPC bridge. The in-process plugin runtime is gone; the bundled in-tree plugins have been migrated. Third-party plugins built against the old in-process API need to be ported to the sandboxed runtime.
+- **Plugins**: Server-managed bundles must be Ed25519-signed by the host and approved by an admin before they load. The host public key is served from `/api/plugin-signing-pubkey` and each bundle response carries the signature in the `X-Bundle-Signature` header. User-uploaded bundles still load unsigned, but managed marketplace and dev-folder bundles do not.
+- **Plugins**: `bundleHash` is now a full SHA-256 over the bundle. Legacy short hashes are migrated on first load; any out-of-band tooling that pinned the old hash format needs to be updated.
+
+### Features
+
+- **Pro**: Tabbed shell with drag-to-reorder, drag-to-edge to split, side-by-side panes, and pane-aware responsive layout with a scoped sidebar overlay
+- **Pro**: Auto-redirect to the Pro shell when Pro mode is on; `proInterface` is kept per-device instead of syncing
+- **Pro**: Multi-account mail sidebar with client routing and a per-account mailbox cache
+- **Pro**: Unified mailbox always visible, with full-text search
+- **Pro**: Cross-account email moves
+- **Pro**: Multi-account calendar sidebar split into owned vs shared per account
+- **Pro**: Multi-account contacts and a cross-account file picker
+- **Pro**: Composer From dropdown grouped by account
+- **Plugins**: Per-plugin admin approval workflow with Ed25519 bundle signing verified on load
+- **Plugins**: Marketplace update flow for installed plugins and themes
+- **Setup**: Allow the setup wizard over plain HTTP with a dismissable warning gate
+- **Setup**: Warn when the JMAP URL points at a local-only host
+- **Account**: List and reorder logged-in accounts from settings (#282)
+- **Mail**: Mobile handoff page with JMAP authentication verification for cross-device OAuth
+- **Mail**: Pluggable reply/forward quote header (#295)
+- **Calendar**: Support multiple flexible event reminders (#170)
+- **Admin**: Expose PWA, app identity, and extension directory keys in the JSON config (#312)
+- **Admin**: Surface OAuth scope settings and wire up orphaned admin policy gates
+
+### Security
+
+- **Plugins**: Pin parent origin in the iframe bridge to block cross-frame postMessage
+- **Plugins**: Ignore plugin-supplied `target` in `ui.openExternalUrl` to block host-frame hijack
+- **Plugins**: Validate plugin/theme id in marketplace install to block path traversal
+- **Plugins**: Prevent plugin config from leaking to non-admin users
+- **Admin**: Gate admin routes against cross-origin CSRF
+- **Auth**: Bind Stalwart auth context to the credential, not the cookie-claimed username
+- **Auth**: Validate OAuth discovery endpoints against SSRF
+- **Mail**: Tighten HTML sanitization at plain-text email, signature, and i18n render sites
+- **Mail**: Block script-bearing MIME types from inline attachment preview
+- **Mail**: Escape print-window fields and re-sanitize body to block XSS
+- **S/MIME**: Stop persisting passphrases in `sessionStorage`
+- **API**: Correct regex for valid API POST path validation
+
+### Fixes
+
+- **Mail**: Serialize draft autosave with send to stop replies stalling in Drafts (#303)
+- **Mail**: Omit empty cc/bcc from `Email/set` so the server does not emit a bare `Cc:` header (#301)
+- **Mobile**: Allow adding contacts from the mail recipient popover (#306)
+- **Mobile**: Prevent dual-scroll and use full width for mail content
+- **Mobile**: OAuth handoff flow
+- **Calendar**: Scope iCal subscriptions per JMAP account; fix refresh and clear
+- **Calendar**: iCal subscription refresh, rollback, and URL normalization
+- **Calendar**: Show avatars in the calendar/address book sharing menu
+- **Contacts**: Normalize malformed contact photo data URIs (#307)
+- **Identity**: Clear identity signature fields when emptied
+- **Identity**: Show size cap on identity signature fields
+- **Identity**: Allow table-based layouts in the HTML signature sanitizer
+- **Plugins**: Load `globals.css` and Geist font in the plugin sandbox iframe
+- **Plugins**: Sync plugin slot iframe height with reported content height
+- **Plugins**: Use plugin slot offer snapshots for `useSyncExternalStore`
+- **Plugins**: Trust the directory version on marketplace install and update
+- **Filters**: Prevent duplication of Bulwark rules with literal braces in values
+- **Setup**: Defer setup wizard HTTP detection to avoid hydration mismatch
+- **Routing**: Anchor unmatched URLs into `main` so 404 renders
+- **Routing**: Respect server-resolved locale on first visit (#309)
+- **Routing**: Split app into `(main)`/`(sandbox)` route groups so the plugin iframe hydrates properly
+- **Files**: Stop parent directory navigation from jumping to root
+- **Build**: Stop pulling `node:dns` into the client bundle via OAuth discovery
+- **UI**: Toggle recipient popover when clicking the name again
+- **UI**: Remove white halo around photo avatars
+
+### i18n
+
+- Add missing translation keys across 16 locales
+
+## 1.6.7 (2026-05-17)
+
+### Features
+
+- **Contacts**: vCard 4.0 parsing and generation support
+- **Admin**: Master-user impersonation route with `app-top-banner` plugin slot rendered on every authenticated page
+- **Admin**: Allow admin password overwrite during setup recovery
+- **Setup**: HTTPS requirement warning in the setup wizard
+- **Mobile**: Show details toggle and expandable panel for sender info
+
+### Performance
+
+- **Calendar**: Speed up calendar invitation banner load
+
+### Security
+
+- **Mail**: Sandbox thread email HTML in `srcDoc` iframe with a CSP `<meta>` tag
+- **Admin**: Redact sensitive config secrets from the admin API response
+- **Admin**: Make impersonation cookies session-only
+
+### Fixes
+
+- **Auth**: Read `OAUTH_SCOPES` at runtime instead of build time
+- **Auth**: Use a relative `Location` header in redirects
+- **Auth**: Adopt orphan session cookie on first SPA load
+- **Mail**: Per-account push subscriptions so multi-account notifications work (#298)
+- **Mail**: Close attachment preview when clicking outside the content area
+- **Mail**: Pin quick reply to the bottom for short emails
+- **Mail**: Show "no body content" instead of an infinite skeleton for bodyless emails
+- **Mail**: Show contact popup when clicking the sender name in the email header
+- **Mail**: Prevent long addresses from overflowing email details columns (#297)
+- **Mobile**: Align quick reply with the mobile bottom toolbar
+- **Mobile**: Respect safe-area insets on mobile bottom bars
+- **Mobile**: Pad `safe-area-inset-top`
+- **UI**: Apply dark background to the email content wrapper in dark mode
+- **UI**: Improve dark mode background colors in the email viewer
+- **UI**: Add viewport export with `initialScale: 1`
+- **UI**: Strip the Stalwart master-user `%` suffix from the displayed account
+- **Plugins**: Warn and block install when the app version is below the plugin's `minAppVersion`
+- **Plugins**: Register `app-top-banner` in plugin-store `SLOT_NAMES`
+- **Plugins**: Carry `configSchema` + `settingsSchema` through marketplace install
+- **Build**: Add `outputFileTracingExcludes` to reduce Turbopack memory tracing
+
+### i18n
+
+- Add missing translation keys across 16 locales
+
+## 1.6.6 (2026-05-15)
+
+### Features
+
+- **Mail**: Sync onboarding completion state across devices so the welcome flow only runs once per account (#285)
+- **Mail**: Distinct icons for Shared, Important, Memos, Scheduled, and Snoozed folders (#288)
+- **Compose**: Raise HTML identity signature length cap to 50,000 characters
+- **Compose**: Allow `<img>` tags in HTML identity signatures for inline logos and banners
+
+### Fixes
+
+- **Files**: Hide Files settings entry and sidebar nav when the `filesEnabled` policy is off (#291)
+- **Admin**: Honor the `cookieSameSite` admin config override instead of always defaulting (#284)
+- **UI**: Standardize punctuation in tooltips and inline comments across locales
+
+### i18n
+
+- Add Danish localization
+- Clean up Danish locale wiring and sort the language picker alphabetically (#286)
+
+## 1.6.5 (2026-05-13)
+
+### Features
+
+- **Protocol**: Register as the system handler for `mailto:` and `webcal:` links from a new protocol handler settings page
+- **Protocol**: Account picker for protocol links when multiple accounts are connected
+- **Protocol**: Import-or-subscribe choice for detected webcal calendars
+- **Protocol**: Reuse the open PWA/session for `mailto:` links instead of always opening a new tab
+- **UI**: Route account avatars through the shared `Avatar` component for consistent fallbacks (#278)
+
+### Fixes
+
+- **Calendar**: Support HTTP basic auth in iCal subscription URLs (#275)
+- **Admin**: Honor admin-uploaded favicon in root metadata (#274)
+- **Admin**: Honor `NEXT_PUBLIC_BASE_PATH` in admin sidebar nav links (#271)
+- **UI**: Broaden body font stack so Thai (and other non-Latin scripts) render correctly in subjects, sender names, and other chrome (#265)
+
+## 1.6.4 (2026-05-11)
+
+### Web Setup Wizard
+
+First-launch web setup wizard. New installs no longer need to hand-edit `.env.local` - point a browser at the container and the wizard probes the JMAP server(s), configures OAuth/OIDC, generates the session secret, accepts branding uploads, and provisions the initial admin password. Admin storage is now split into `ADMIN_CONFIG_DIR` (operator-authored, mountable read-only after setup) and `ADMIN_STATE_DIR` (runtime audit log and login timestamps); the legacy `ADMIN_DATA_DIR` keeps working for existing installs.
+
+### Features
+
+- **Setup**: Web setup wizard with multi-step flow: Server, Auth, Security, Logging, Branding, Review, Admin
+- **Setup**: Admin config/state directory split with optional `ADMIN_CONFIG_READONLY` for immutable deployments (#226)
+- **Setup**: File uploads on the wizard branding step
+- **Setup**: Redesigned review step with grouped summary and an advanced toggle for the full config
+- **Setup**: Require explicit confirmation when JMAP probe finds no session
+- **Mail**: Drag attachments out of the viewer to the local file system (#267)
+- **Mail**: Reading Pane at Bottom mail layout (#262)
+- **Mail**: Configurable signature position - above or below quoted text (#266)
+- **Mail**: Signature position is now searchable from the email behavior settings
+- **Mail**: Show avatar in Focused list for compact density and above
+- **Mail**: Align Focused list preview with other layout previews
+- **Compose**: From-header override in the composer with catch-all auto-reply, replies to an alias on a domain you own pre-fill the alias as the sender even when it isn't a configured identity (#246)
+
+### Performance
+
+- **Mail**: Prefetch initial email data on login
+- **Auth**: Parallelize login round-trips and drop redundant JMAP re-verify
+
+### Fixes
+
+- **Auth**: Skip upstream JMAP reverify for trusted URLs (#237)
+- **Auth**: Show account identity in the switcher header instead of the sending alias
+- **Compose**: Fall back to the primary identity signature on reply
+- **Setup**: Drop redundant first-login banner about removing `ADMIN_PASSWORD` (#222)
+- **UI**: Consistent notice cards for server probe results
+
+### i18n
+
+- Add missing translation keys across 15 locales
+
+## 1.6.3 (2026-05-08)
+
+### Features
+
+- **Mail**: Lift 5-account cap on HTTP/2
+- **Mail**: Import `.eml` files via folder right-click menu
+
+### Fixes
+
+- **Mail**: Trim leading whitespace from email list preview
+- **Mail**: Fall back when only the truncation indicator remains in email preview
+- **Mail**: Hide files/contacts nav items when JMAP server lacks support
+- **Viewer**: Preserve emoji colors in dark mode
+- **Viewer**: Prevent white-on-white in dark mode for nested `bgcolor` containers
+- **Viewer**: Render plain-text-only emails as text, not HTML
+- **Viewer**: Render HTML-only emails and redesign external content prompt
+- **Viewer**: Pad Word/Outlook HTML email rendering
+- **Compose**: Redesign quick reply to match sender/banner layout
+- **Compose**: Disable StarterKit's bundled link/underline to avoid duplicate extensions
+- **Sharing**: Request `shareWith` explicitly so calendar/address book shares survive a re-login (#257)
+- **UI**: Strip leading punctuation when computing avatar initials
+- **Mobile**: Hide email hover actions
+
+### i18n
+
+- Add missing translation keys across 15 locales
+
+## 1.6.2 (2026-05-06)
+
+### Features
+
+- **Plugins**: Hot-reload and dev-folder loading for live plugin development
+- **Plugins**: On-demand `src/` bundling via esbuild
+- **Plugins**: New `http:fetch` permission and `httpOrigins` manifest field
+- **Plugins**: `onBeforeEmailSend` hook with `fromEmail` exposed on `OutgoingEmail`
+- **Plugins**: Project `EmailReadView` for the email-banner slot and expose auth results
+- **Plugins**: Ingest icon, banner, and screenshots from the source repo
+- **Plugins**: Restrict plugin and theme install/uninstall to the admin dashboard
+- **Mail**: Multi-server JMAP support
+- **Settings**: Fulltext search across the settings sidebar
+- **Settings**: Sub-result rows with highlight in settings search
+- **Settings**: Surface plugin settings as search sub-results
+- **Settings**: Remove experimental tags from themes, plugins, and sender favicons
+- **Viewer**: Redesigned external-mail banner above attachments
+- **Calendar**: Calendar invitation banner expands on row click
+- **Calendar**: Calendar invitation banner is now collapsible
+
+### Fixes
+
+- **Admin**: Collapse admin panel into a single tabbed page
+- **Plugins**: Inline plugin configure panel to avoid dev-mode hang
+- **Plugins**: Resolve `PLUGIN_DEV_DIR` plugins in admin config route
+- **Plugins**: Add missing body type assertion in `createPluginAPI` fetch options
+- **Plugins**: Propagate `settingsSchema`
+- **Settings**: Highlight plugin and theme cards in search results
+- **Settings**: Open plugin card on first click of a setting sub-result
+- **Settings**: Drop ghost sub-results from account and language search
+- **Settings**: Improve search highlight styling
+- **Viewer**: Show notification banners above attachments
+- **Viewer**: Rework S/MIME banner to match calendar invitation
+- **Viewer**: Close PDF preview on Escape before email viewer
+- **Viewer**: Render PDF previews via `<object>` with `blob:` in object-src CSP (#253)
+- **Calendar**: Align invitation icon with sender avatar column
+- **Calendar**: Fix invitation picker clipping (#250)
+- **Auth**: Read `activeAccountId` from authStore in account selectors
+- **UI**: Adjust toast item border radius and progress bar styles
+- **UI**: Remove fly-in animation from context menu submenus
+- **i18n**: Add missing Czech flag icon
+
+### i18n
+
+- Add missing translation keys across 15 locales
+
+## 1.6.1 (2026-05-04)
+
+### Features
+
+- **Updates**: Update-available detection with non-dismissible notice and dev-reload refresh
+- **Plugins**: New plugin hooks for compose, attachments, search, lifecycle, and routing
+- **Sharing**: Share indicators for calendars and contacts, updated JMAP capabilities (#244)
+- **Mail**: Auto-add recipients to trusted senders when replying
+- **Identity**: Sanitize identity display name to prevent invalid `From` headers
+
+### Fixes
+
+- **Mobile**: Synchronize mobile submenu view with browser history for better navigation
+- **Viewer**: Update email viewer styles to improve overflow handling
+- **Auth**: Ensure `cookieSlot` consistency during account updates in auth store
+- **Auth**: Thread per-account cookie slot through OAuth flows
+- **Calendar**: Square the colored left marker on calendar events
+- **About**: Show git commit in About instead of "unknown"
+
+### i18n
+
+- Update mailbox context menu translations across 12 locales
+
+## 1.6.0 (2026-05-01)
+
+### Features
+
+- **Deployment**: Subpath deployment support via `NEXT_PUBLIC_BASE_PATH` environment variable
+- **Mail**: Image attachment thumbnails and preview chips
+- **Mobile**: Reworked mobile mail viewer toolbar
+- **Mobile**: Mobile-friendly settings panel
+- **Mobile**: Mobile-friendly admin panel
+- **Mail**: Redesigned expanded details panel
+- **Mailbox**: Show full path in mailbox context menu header with intelligent path shortening
+
+### Fixes
+
+- **Viewer**: Respect per-email dark mode toggle when "always show in light mode" is on
+- **Navigation**: Scroll apps list in navigation rail to prevent overflow
+- **Context menu**: Clamp submenu inside viewport
+- **Context menu**: Prevent context menu from clipping below viewport
+- **Context menu**: Prevent jump and animation on open
+- **Mail**: Stop silently destroying emails when trash mailbox isn't found (#195)
+- **Mail**: Preserve list scroll position when tagging an email
+- **Mail**: Render below-header overflow popup outside clipped row
+- **Mail**: Collapse below-header attachments to single row with overflow pill
+- **Push**: Fix push preview JMAP query
+- **Tour**: Navigate tour to mailbox when starting from another page
+- **i18n**: Add `useTranslations` for "selected emails" and "cancel" on email list batch operations
+
+### i18n
+
+- Translate SPF/DKIM/DMARC tooltips
+- Add missing keys across 14 locales
+
+## 1.5.4 (2026-05-01)
+
+### Features
+
+- **PWA**: Web push notifications for new inbox mail (#233), with click-through to open the message
+- **Composer**: Insert and edit tables in rich-text emails (#236)
+- **Mail**: Configurable sub-addressing delimiter character (#239)
+- **i18n**: Turkish localization
+- **i18n**: Missing keys filled in across 15 locales
+
+### Fixes
+
+- **Mail**: Set In-Reply-To and References headers on replies (#234)
+- **Mail**: Persist htmlBody in drafts to preserve rich formatting (#236)
+- **Auth**: Pin JMAP auth verification to the configured server URL (#237)
+- **Auth**: Evict unrecoverable basic-auth accounts on reload
+- **Notifications**: Scope new-mail notifications to genuine inbox deliveries
+- **Notifications**: Extend PushVerification timeout and clean up leftover subscriptions
+- **Viewer**: Smooth out body load to prevent flicker on first render
+- **Viewer**: Prevent iframe flash when loading images or trusting the sender
+- **Viewer**: Pad bare HTML emails like plain-text mails for consistent layout
+- **Viewer**: Light-mode override now only affects body content
+- **Viewer**: Detect `<style>` tag when applying padding
+- **Viewer**: Drop iframe border-radius
+- **Calendar**: Localize event start date in detail popover and event modal
+- **Dev**: Include http protocol in connect-src for development mode CSP
+
+## 1.5.3 (2026-04-28)
+
+> **New:** Help shape Bulwark Webmail. Each instance now sends a lightweight daily heartbeat (version, platform, bucketed account counts, feature toggles - never message data or PII) so we can see which platforms and features actually get used and prioritize fixes where they matter most. You're in control: opt out any time from **Admin → Telemetry** or by setting `BULWARK_TELEMETRY=off`. Full schema in the [privacy notice](https://bulwarkmail.org/docs/legal/privacy/telemetry).
+
+### Features
+
+- **Telemetry**: Anonymous instance telemetry, on by default. Reports schema version, platform, bucketed account counts, and feature toggles only - disable from the admin UI, with `BULWARK_TELEMETRY=off`, or by clearing the endpoint
+- **Telemetry**: Track unique logins (HMAC'd per instance, 90-day retention) so the heartbeat can report bucketed account totals without storing usernames
+- **Plugins**: Theme API v2 with token compiler and skin slot
+- **Plugins**: Extension preview page and detailed extension info API
+- **Calendar**: Right-click context menu on empty calendar space
+- **Docker**: Persistent named volume for telemetry data so the instance id and admin's consent choice survive container upgrades
+
+### Fixes
+
+- **Security**: Block telemetry endpoint from pointing at internal/loopback hosts (validation + DNS-rebind re-check at fetch time)
+- **Security**: Harden plugin config, TOTP token exchange, and branding file serving
+- **Mail**: Batch shortcuts now act on the multi-selection when one is present (#228)
+
+## 1.5.2 (2026-04-27)
+
+### Features
+
+- **Plugins**: New `composer-sidebar` slot and `ui:composer-sidebar` permission - plugins can now render a panel on either side of the New Message dialog. See `repos/subway-surfers` for an example
+- **Plugins**: Manifests can declare `frameOrigins` - a strictly-validated list of `https://host` origins the plugin needs to embed. The proxy reads the union from enabled plugins and merges it into the host CSP `frame-src`, so the host CSP no longer needs to know about specific embed providers
+- **Calendar/Contacts**: JMAP sharing for calendars and address books
+- **i18n**: Czech language support
+
+### Fixes
+
+- **Security**: Validate URLs before outbound fetch
+- **Calendar**: Prevent drag creation on touch events in the time grid
+- **Contacts**: Emit RFC 9553 name kinds and decode QUOTED-PRINTABLE in vCard import (#224, #187)
+- **Mail**: Hide preview line in compact density to match settings preview (#223)
+- **Proxy**: Inline matcher for Next.js proxy and drop unnecessary Node.js runtime config
+- **i18n**: Portuguese fixes for "ficheiro" and "contactos" variants
+
+## 1.5.1 (2026-04-25)
+
+### Features
+
+- **Stalwart**: OAuth auto-setup with dialog and validation for origin and issuer URLs
+- **Mail**: Right-click context menu on the folders sidebar
+- **Mail**: Replace folder `prompt()` calls with a proper modal dialog
+- **Calendar**: Add 'Today' button to the desktop calendar toolbar
+- **Junk**: Setting to show avatars in the Junk folder (off by default)
+
+### Fixes
+
+- **Admin**: Restore admin panel after Stalwart v0.16 REST API removal
+- **Viewer**: Restore broken viewer toolbar actions and improve the mobile menu (#220)
+- **Folders**: Stop flicker on background folder refresh
+- **Email**: Preserve search/filter on batch move and archive
+- **Email**: Preserve search/filter when moving emails via drag-drop
+- **i18n**: Improve Korean flag
+
+## 1.5.0 (2026-04-22)
+
+### Breaking Changes
+
+- **Self-service portal now needs Stalwart 0.16+**: Stalwart dropped its self-service HTTP API in 0.16.0 and replaced it with JMAP. Bulwark Webmail only talks to the new JMAP endpoint, so the self-service portal (account settings, app passwords, API keys) requires Stalwart 0.16 or newer. `STALWART_API_URL` is deprecated, these actions go through the normal JMAP session.
+
+### Features
+
+- **Stalwart**: Migrate Stalwart management API to JMAP `x:` methods for Stalwart 0.16
+- **Admin**: Add API Keys management and IP allowlist for App Passwords
+- **Contacts**: Revamp contact detail view with filters, photo, print, and duplicate actions
+- **Contacts**: Add contact activity component showing recent emails and upcoming events
+- **Contacts**: Add right-click context menu
+- **Contacts**: Group contacts by first letter with sticky section headers, toggleable in settings
+- **Calendar**: Support resizing events from the top edge
+- **Calendar**: Add timezone-aware formatting for event start times and update `utcEnd` on duration change
+- **Calendar**: Optimize layout of overlapping events
+- **Calendar**: Add collapsible details to calendar invitation banner
+- **Email**: Implement batch archiving and bulk moving of emails
+- **Email**: Show full folder path in move/drop toast
+- **Settings**: Reorganize settings into 6 groups with clearer tabs
+- **Navigation**: Add account-addition button to the navigation rail
+- **Mobile**: Streamline email viewer header layout
+- **Mobile**: Pass `isMobile` through calendar views and time-grid interactions
+
+### Fixes
+
+- **Mailbox**: Retry mailbox fetch on first login to handle lazy provisioning (#217)
+- **Mailbox**: Use fresh state in archive handling to avoid stale mailbox data
+- **Mailbox**: Improve error message on mailbox creation failure
+- **Auth**: Skip `checkAuth` on route change when already authenticated
+- **Auth**: Clean up unused imports and improve TOTP QR code rendering
+- **UI**: Align hover styles and selection-toggle target with focused item
+- **UI**: Read `matchMedia` synchronously on client to prevent layout flicker
+
+### Refactor
+
+- **Settings**: Remove Stalwart API URL configuration (now derived via JMAP)
+
+### Chore
+
+- **i18n**: Add missing translation keys
+- **Deps**: Bump dependencies to latest compatible versions
+
+## 1.4.14 (2026-04-16)
+
+Thank you for your donations:
+
+- _You? [Become a sponsor!](https://github.com/sponsors/bulwarkmail)_
+
+**One-time**
+
+- [@mkorthaus-private](https://github.com/mkorthaus-private)
+- [@boris22100](https://github.com/boris22100)
+
+**Monthly**
+
+- [@pr0ton11](https://github.com/pr0ton11)
+
+### Features
+
+- **Email**: Add unified mailbox across accounts and sidebar icons toggle
+- **Email**: Enhance email deletion and spam handling with improved parameterization
+- **Sieve**: Enhance external rule handling in parser and store (#201)
+- **Plugins**: Add i18n API, render hooks, and new intercept hooks to plugin system
+- **PWA**: Dynamic PWA manifest with configurable name, description, and icons
+- **PWA**: Show app name and logo in install prompt
+- **i18n**: Add Ukrainian language with flags and missing translation keys
+- **i18n**: Configurable locale prefix via `NEXT_PUBLIC_LOCALE_PREFIX`
+- **API**: Add `apiFetch` helper for mount-prefix-aware API calls
+
+### Fixes
+
+- **Calendar**: Send iMIP invitation emails when creating or updating calendar events (#192)
+- **Calendar**: RFC 5545/6047 compliance for outgoing iMIP calendar emails
+- **Calendar**: Add `calendarAddress` and `replyTo` to participants for Stalwart compatibility (#189, #192)
+- **Calendar**: Improve CalDAV task detection for external clients like Thunderbird (#84)
+- **Email**: Hide ICS attachments from attachment list when invitation banner is shown
+- **Email**: Send before storing in Sent via `onSuccessUpdateEmail` (#188)
+- **Email**: Standardize tag naming and fix unknown keyword display (#184, #185)
+- **i18n**: Skip intl middleware for paths already containing a locale prefix
+- **Docs**: Document PWA and branding env vars in `.env.example`
+- **Docs**: Use `company` consistently in `.env.example` branding comments
+
+## 1.4.13 (2026-04-12)
+
+Thank you for your donations:
+
+**One-time**
+
+- [@boris22100](https://github.com/boris22100)
+- [@mkorthaus-private](https://github.com/mkorthaus-private)
+
+**Monthly**
+
+- _You? [Become a sponsor!](https://github.com/sponsors/bulwarkmail)_
+
+### Features
+
+- **Contacts**: Store trusted senders in a dedicated JMAP address book (#176)
+- **Email**: Warn on send when attachment keyword found but no file attached (#172)
+- **Email**: Enable keyword reordering (#174) and multi-tag support per email (#173)
+- **PWA**: Add "don't remind me again" option to install prompt
+- **Auth**: Add `SESSION_SECRET_FILE` and `OAUTH_CLIENT_SECRET_FILE` environment variable support
+- **Plugins**: Add `onAvatarResolve` plugin hook
+- **Docker**: Publish main and dev branches as separate GHCR packages
+
+### Fixes
+
+- **Email**: Style links in plain text emails
+- **Email**: Seed list history entry when app initializes on an email view
+- **Email**: Remount composer on draft edit and preserve identity (#60)
+- **Contacts**: Display contact names stored in `name.full` (#179)
+- **Contacts**: Fix category dropdown blocking Save button in contact form (#177)
+- **Contacts**: Resolve TS error from optional `name.components` in vCard parser
+- **Search**: Search all folders when filtering emails by tag (#175)
+- **Auth**: Include mount prefix in SSO redirect URI when app is served under a subpath
+- **PWA**: Correct PWA icons with proper sizing, transparency, and dark/light mode support
+
+## 1.4.12 (2026-04-09)
+
+Thank you for your donations:
+
+**One-time**
+
+- [@mkorthaus-private](https://github.com/mkorthaus-private)
+
+**Monthly**
+
+- _You? [Become a sponsor!](https://github.com/sponsors/bulwarkmail)_
+
+### Features
+
+- **PWA**: Add PWA support with service worker and install prompt
+- **Calendar**: Add birthday calendar feature with settings and localization
+- **Calendar**: Clamp February 29 birthdays in non-leap years
+- **Identity**: Add automatic identity synchronization (#167)
+- **Plugins**: Disable plugins by default and require admin approval
+- **Plugins**: Replace auth header exposure with a secure HTTP proxy API for plugins
+- **Auth**: Add configurable OAuth scopes and cookie security via environment variables
+- **Email**: Sync mail view to browser history for back/forward navigation
+- **Contacts**: Add ability to rename address books (#152)
+- **UI**: Add version badge in settings
+- **i18n**: Add Latvian (lv) locale support
+- **i18n**: Add Polish language support
+- **i18n**: Add Korean language support
+- **i18n**: Add Simplified Chinese (zh_CN) locale support
+
+### Fixes
+
+- **Email**: Show recipient instead of sender in Sent and Drafts folder lists
+- **Email**: Embed dropped images as data URLs and prevent duplicate attachments (#163)
+- **Email**: Fix logic for marking email as read in EmailViewer
+- **Email**: Fix archive action passing MouseEvent as argument
+- **Mailbox**: Preserve search filters on push-triggered mailbox refresh (#164)
+- **Mailbox**: Align shared account folders with primary folders (#151)
+- **Mailbox**: Fetch mailboxes on mount in FolderSettings when store is empty
+- **Mailbox**: Improve mailbox deletion error handling
+- **Calendar**: Improve calendar event retrieval by batching requests to avoid server limits (#141)
+- **Calendar**: Compute per-occurrence UTC start/end in recurrence expansion (#116)
+- **Calendar**: Guard against undefined trigger in calendar event alert popover (#143)
+- **Files**: Stream WebDAV PUT uploads to avoid buffering in memory (#162)
+- **Files**: Prune recent files against server nodes on refresh (#146)
+- **Files**: Fix file deletion logic to update recent files and handle errors (#146)
+- **Files**: Extend file drop zone to fill remaining viewport height
+- **Files**: Fallback to application/octet-stream for long MIME types
+- **Security**: Replace unguarded crypto.randomUUID() with safe generateUUID() utility
+- **Security**: Validate plugin HTTP post URL against origin with regression tests
+- **Security**: Allow blob images in CSP for inline drag-and-drop (#163)
+- **Auth**: Resolve settings sync identity mismatch for OAuth/SSO sessions (#127)
+- **Contacts**: Fix address book ID namespacing for shared contacts in create and update operations (#133)
+- **UI**: Fix focused mode expanding beyond screen bounds (#156)
+- **API**: Handle 403 on principal fetch without console error
+- **API**: Enhance error handling in Stalwart API responses
+
+## 1.4.11 (2026-03-31)
+
+### Features
+
+- **Logging**: Add logging categories for better log management
+
+### Fixes
+
+- **Security**: Harden security with CSP enforcement, SSRF redirect validation, reenabled S/MIME chain verify, IP spoofing prevention, and PDF iframe sandbox
+- **Security**: Harden proxy authentication and SSRF defenses
+- **Security**: Block plugins with dangerous JS patterns and enforce strict session secret length validation
+- **S/MIME**: Add self-signed certificate detection and update status messages for S/MIME signatures
+- **Email**: Auto-focus input fields in email composer for improved user experience (#126)
+- **Mailbox**: Prevent orphaning of nested mailboxes by restricting deduplication to root-level folders
+- **JMAP**: Strip server-immutable fields from updates before sending to JMAP (#128)
+- **Files**: Update file feature disabled messages and add stability warnings
+- **i18n**: Add missing translation keys to all non-English locales
+
+## 1.4.10 (2026-03-31)
+
+### Features
+
+- **Plugins**: Add plugin configuration UI with schema-driven admin config page, calendar event action slot, and Jitsi Meet plugin
+- **Calendar**: Implement client-side recurrence expansion for calendar events
+- **Calendar**: Add iCal subscription editing and batch event import
+- **Calendar**: Add hover preview settings and functionality
+- **Calendar**: Add virtual location input for calendar events (#121)
+- **Email**: Add reply-to addresses support in email composer
+- **Email**: Add mail layout settings and update email list components
+- **Email**: Add auto-select reply identity feature with settings and localization
+- **Email**: Enhance compose functionality with button integration and translations
+- **Filters**: Preserve activation state when updating or creating Sieve scripts to avoid deactivating server-managed vacation scripts
+- **Filters**: Skip server-managed vacation script in Sieve script handling
+- **Settings**: Add support for custom JMAP server endpoints in login and settings
+- **Settings**: Add folder expansion state management and settings navigation
+- **UI**: Add options to hide account switcher and show account avatars on navigation rail
+- **i18n**: Add JMAP server endpoint labels and hints in multiple languages
+- **i18n**: Add missing translation keys to all non-English locales
+
+### Fixes
+
+- **Security**: Patch critical auth bypass and credential leak vulnerabilities
+- **Security**: Support 3DES S/MIME decryption by importing legacy RSAES-PKCS1-v1_5 keys and add diagnostic logging (#35)
+- **Security**: Account isolation, auto-import signer certs, and no-key error handling (#35)
+- **Calendar**: Fix JSCalendar 2.0 recurrenceRule single-object compatibility (#116)
+- **Calendar**: Enhance calendar event handling to distinguish between events and tasks
+- **Calendar**: Link existing events to target calendar during iCal import instead of skipping (#113)
+- **Calendar**: Deduplicate UIDs during iCal import to prevent mass failures (#113)
+- **Calendar**: Fix events disappearing after iCal import/subscription refresh
+- **Calendar**: Enhance calendar event handling with full-day detection and layout adjustments
+- **Calendar**: Use UTC timestamps for timed event rendering
+- **Calendar**: Work around Stalwart not returning Task objects via CalendarEvent/query
+- **Email**: Enhance email loading and deduplication logic in email store (#119)
+- **Email**: Ensure draft editing function is called correctly in EmailViewer component (#60)
+- **Email**: Match hover action background to selected row state
+- **Email**: Align tag counts with mailbox folder counts in sidebar
+- **Auth**: Handle 2FA/TOTP session expiry with basic auth (#117)
+- **Mailbox**: Improve mailbox tree logic and enhance mailbox handling with logging (#118)
+- **UI**: Improve dark mode handling for media elements and background images
+- **UI**: Adjust account list spacing and remove push connection indicator
+- **UI**: Fix nested button in theme card
+
+## 1.4.9 (2026-03-27)
+
+### Features
+
+- **Admin**: Add Stalwart admin authentication, sidebar access, and a reorganized dashboard with dedicated policy sections
+- **Plugins**: Add plugin/theme admin dashboard, harness tooling, forced enable or disable controls, managed policy enforcement, and a resizable detail sidebar
+- **Filters**: Add vacation responder management with Sieve generation and parsing, UI integration, and improved sync preservation
+- **Email**: Add plain text only composer mode, optional conversation threading disable, configurable hover action placement, and OAuth app password support
+- **UI**: Add drag-and-drop customization for sidebar apps
+- **Files**: Use dynamic server-configured maximum upload sizes
+- **i18n**: Add Russian locale support and complete missing translation strings for recent task features
+
+### Fixes
+
+- **Calendar**: Improve date parsing and event normalization, prevent calendar page re-render loops, ensure unique ICal subscription IDs, and create all-day events with correct JSCalendar midnight handling
+- **Email**: Respect the configured mark-as-read delay in EmailViewer and fetch full email content when needed while editing drafts (#60, #95)
+- **Auth**: Improve network error handling, add JMAP rate limiting handling, and enhance settings retrieval and persistence diagnostics (#100, #104)
+- **UI**: Improve mobile layout behavior on contacts and calendar pages (#103)
+- **Themes**: Repair theme ZIP bundle handling and enforce admin theme locks correctly
+- **Code Quality**: Resolve outstanding ESLint warnings across the codebase
+
+## 1.4.8 (2026-03-23)
+
+### Features
+
+- **Email**: Add support for marking emails as answered or forwarded and display status icons in email list and thread views
+- **Email**: Enhance identity selection by supporting sub-addressing (plus addressing) in email composer
+- **Settings**: Add notification settings with sound picker, preview playback, and configurable alert sounds
+- **Settings**: Add default mail program settings with localization support across all locales
+- **Auth**: Implement path prefix handling for OAuth callbacks and login redirects, enabling reverse proxy deployments
+- **Validation**: Add all multi-part TLDs for domain validation in favicon API (#81)
+
+### Fixes
+
+- **Calendar**: Fix bugs in duration parsing, RFC compliance, and event handling across calendar components
+- **Calendar**: Detect tasks created by external CalDAV clients such as Thunderbird
+- **Settings**: Enhance account settings with username and authentication method display (#90)
+
+## 1.4.7 (2026-03-21)
+
+### Features
+
+- **Calendar**: Add task management features with task creation, editing, and status tracking
+- **Calendar**: Add option to show week numbers in mini-calendar
+- **Email**: Add resizable image component and rich text editor with image upload support
+- **Files**: Support uploading folders via drag-and-drop and toolbar button
+- **Filters**: Add expanded visual view for filter rules
+- **Auth**: Add non-interactive SSO login flow for embedded/iframe deployments (#69)
+- **DevOps**: Add separate Docker build workflow for releases and dev branch images
+
+### Fixes
+
+- **Calendar**: Handle updates and deletions for synthetic JMAP IDs in calendar events with fallback to destroy and recreate
+- **Security**: Extend CryptoEngine to support legacy algorithms and integrate with LinerEngine for decryption
+- **Auth**: Refactor logout to use synchronous flow with full page redirect
+- **Email**: Update iframe sandbox attributes to allow popups to escape sandbox
+- **i18n**: Add missing translation keys across all locales
+- **Docker**: Update .env.example to clarify Docker volume mounting for settings data directory
+
+## 1.4.6 (2026-03-21)
+
+### Features
+
+- **Demo**: Add full demo mode with fixture data for emails, calendars, contacts, files, filters, identities, mailboxes, and vacation responses
+- **Demo**: Implement JMAP client interface abstraction to support demo and live backends
+- **Contacts**: Add no-category filter, drag-and-drop to category, and category combo box in contact form
+- **Email**: Add hover actions for emails with configurable quick-action buttons
+- **Settings**: Implement keyword migration functionality for upgrading legacy email tags
+- **Security**: Enhance S/MIME certificate extraction and add legacy PBE (password-based encryption) support
+- **Tour**: Add interactive guided tour overlay for new user onboarding
+
+### Fixes
+
+- **Settings**: Add missing `showTimeInMonthView` and `showOnMobile` type definitions to settings store
+- **UI**: Adjust padding and size of sidebar buttons for improved layout
+
+## 1.4.5 (2026-03-20)
+
+### Features
+
+- **Calendar**: Add prev/next navigation buttons and date label to desktop calendar toolbar
+- **Calendar**: Add pending event preview functionality to calendar views and event modal
+- **Calendar**: Add setting to show event start time in month view
+- **Contacts**: Implement pagination for fetching contacts with maxObjectsInGet capability
+- **Email**: Add attachment position setting in email settings
+- **Layout**: Add mobile visibility toggle for sidebar apps
+- **Error**: Add NotFound component to handle 404 errors and redirect unauthenticated users
+
+### Fixes
+
+- **Auth**: Enhance account switching logic and clear stores on account change
+- **Auth**: Improve account restoration logic and handle stale accounts
+- **Auth**: Improve draft handling in email composer and enhance session cookie verification
+- **Calendar**: Expand recurring events in CalendarEvent/query so individual occurrences are returned (#65)
+- **Calendar**: Validate event start field when fetching calendar events
+- **Calendar**: Auto-scroll agenda view to today's events and include today's date in groups
+- **Calendar**: Correct JSX syntax in CalendarToolbar component
+- **Dependencies**: Update flatted to 3.4.2
+- **DevOps**: Use native ARM runners instead of QEMU for Docker builds
+- **DevOps**: Enhance health check with detailed memory diagnostics and stable liveness probe
+
 ## 1.4.4 (2026-03-19)
 
 ### Features
@@ -186,7 +948,7 @@
 ### Fixes
 
 - **Context menu**: Fix "Move to folder" submenu closing when scrolling the folder list or moving the mouse to the submenu (#19)
-- **Move to folder**: Fix emails not actually moving on the server — JMAP response errors were silently ignored and shared account IDs were not resolved correctly
+- **Move to folder**: Fix emails not actually moving on the server - JMAP response errors were silently ignored and shared account IDs were not resolved correctly
 - **Dependencies**: Update tailwindcss, lucide-react, @tanstack/react-virtual, @typescript-eslint/\*, globals, @types/node
 
 ## 1.1.1 (2026-02-28)
@@ -196,7 +958,7 @@
 - **Email viewer**: Show/hide details toggle now stays in place when expanded instead of jumping to the bottom of the details section (#18)
 - **Email viewer**: Details toggle text is now properly translated (was hardcoded in English)
 - **Instrumentation**: Resolve Edge Runtime warnings by splitting Node.js-only code into a separate module
-- **Security**: Patch minimatch ReDoS vulnerability (CVE-2026-27903) — upgrade 9.0.6→9.0.9 and 3.1.3→3.1.5
+- **Security**: Patch minimatch ReDoS vulnerability (CVE-2026-27903) - upgrade 9.0.6→9.0.9 and 3.1.3→3.1.5
 
 ## 1.1.0 (2026-02-28)
 

CONTRIBUTING.md

@@ -1,16 +1,30 @@
 <div align="center">
 
 <picture>
-  <source media="(prefers-color-scheme: dark)" srcset="public/branding/Bulwark%20Logo%20with%20Lettering%20White%20and%20Color.svg" />
-  <source media="(prefers-color-scheme: light)" srcset="public/branding/Bulwark%20Logo%20with%20Lettering%20Dark%20Color.svg" />
-  <img src="public/branding/Bulwark%20Logo%20with%20Lettering%20Dark%20Color.svg" alt="Bulwark Webmail" width="220" />
+  <source media="(prefers-color-scheme: dark)" srcset="public/branding/Bulwark_Logo_with_Lettering_White_and_Color.svg" />
+  <source media="(prefers-color-scheme: light)" srcset="public/branding/Bulwark_Logo_with_Lettering_Dark_Color.svg" />
+  <img src="public/branding/Bulwark_Logo_with_Lettering_Dark_Color.svg" alt="Bulwark Webmail" width="280" />
 </picture>
 
 </div>
 
 # Contributing to Bulwark Webmail
 
-Thank you for your interest in contributing to Bulwark Webmail! This document provides guidelines and information for contributors.
+We're writing the webmail we wanted in 2026 and didn't find. Modern protocol, modern tooling, modern UI. Not a SaaS. Not a startup. Not for sale.
+
+If that resonates with you, we'd love your help. This guide covers how to get the project running, the conventions we follow, and how to land your first change.
+
+## Join the Community
+
+You don't need to be an expert to contribute. Whether you're setting up your dev environment for the first time, filing a bug, or translating a string, the Discord is the fastest way to get unstuck and meet the people working on this.
+
+- **Get support** - real-time help with development hurdles
+- **Share ideas** - feature suggestions, design feedback, doc improvements
+- **Collaborate** - meet the team and other contributors
+
+[**Join the Bulwark Discord Server**](https://discord.gg/tYCujymGrT)
+
+---
 
 ## Getting Started
 
@@ -83,37 +97,31 @@ These checks run automatically on commit via Husky pre-commit hooks.
 
 ## Internationalization (i18n)
 
-This project uses **next-intl** for internationalization. Please follow these guidelines:
+This project uses **next-intl**. English (`/locales/en/common.json`) is the source of truth; we ship 15 additional locales (cs, de, es, fr, it, ja, ko, lv, nl, pl, pt, ru, tr, uk, zh).
 
-### Key Rules
+### Rules
 
-1. **Never hardcode user-facing text** - Always use translations:
+1. **Never hardcode user-facing text** - always use translations:
 
    ```tsx
    const t = useTranslations("namespace");
    return <div>{t("key")}</div>;
    ```
 
-2. **Translation file locations**:
-   - English: `/locales/en/common.json`
-   - French: `/locales/fr/common.json`
+2. **Add new keys to `en/common.json` first.** Other locales can follow in the same PR or a follow-up - missing keys fall back to English.
 
 3. **Namespace organization**:
-   - `login.*` - Login page strings
-   - `sidebar.*` - Sidebar navigation
-   - `email_list.*` - Email list component
-   - `email_viewer.*` - Email viewer component
-   - `email_composer.*` - Email composer
-   - `common.*` - Shared strings
-   - `notifications.*` - Toast/alert messages
-   - `settings.*` - Settings page
+   - `login.*` - login page
+   - `sidebar.*` - sidebar navigation
+   - `email_list.*` - email list
+   - `email_viewer.*` - email viewer
+   - `email_composer.*` - composer
+   - `settings.*` - settings page
+   - `notifications.*` - toasts and alerts
+   - `common.*` - shared strings
 
-4. **Adding new strings**:
-   - Add to **both** English and French translation files
-   - Use descriptive, hierarchical keys
-   - Keep translations consistent in tone
+4. **Locale-aware navigation**:
 
-5. **Locale-aware navigation**:
    ```tsx
    router.push(`/${params.locale}/settings`);
    ```
@@ -192,16 +200,11 @@ webmail/
 
 ## Security
 
-- **Never commit sensitive data** (API keys, passwords, etc.)
+- **Never commit secrets** - API keys, passwords, tokens, `.env*` files
 - **Sanitize user input** and email content
-- **Block external content** by default for privacy
-- Report security vulnerabilities privately
+- **Block external content** by default - privacy is the point
+- **Report vulnerabilities privately** to bulwark@rbm.systems, not via public issues
 
 ## Questions?
 
-If you have questions about contributing, feel free to:
-
-- Open an issue for discussion
-- Check existing issues and pull requests
-
-Thank you for helping improve Bulwark Webmail!
+Open an issue, search existing ones, or ask in Discord. Thanks for helping build the webmail we all wished existed.

Dockerfile

@@ -4,6 +4,14 @@ COPY package.json package-lock.json ./
 RUN npm ci
 COPY . .
 ENV NEXT_TELEMETRY_DISABLED=1
+# Optional: serve under a subpath like /webmail. Baked into emitted asset URLs
+# at build time, so it cannot be changed without rebuilding.
+ARG NEXT_PUBLIC_BASE_PATH=
+ENV NEXT_PUBLIC_BASE_PATH=$NEXT_PUBLIC_BASE_PATH
+# Commit SHA shown in the About screen. .dockerignore excludes .git, so
+# `git rev-parse` inside the build can't find it - CI must pass it in.
+ARG GIT_COMMIT=unknown
+ENV GIT_COMMIT=$GIT_COMMIT
 RUN npx next build --webpack
 
 FROM node:24-alpine AS runner
@@ -26,6 +34,7 @@ RUN apk upgrade --no-cache && \
 COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+RUN mkdir -p /app/data/settings /app/data/admin /app/data/admin-state /app/data/telemetry && chown -R nextjs:nodejs /app/data
 USER nextjs
 EXPOSE 3000
 ENV PORT=3000

FEATURES.md

@@ -0,0 +1,135 @@
+# Features
+
+## Mail
+
+- Read, compose, reply, reply-all, and forward with a Tiptap rich text editor (inline images, drag-and-drop embedding, tables)
+- Gmail-style threading with inline expansion and an optional conversation toggle
+- Unified mailbox view across all connected accounts
+- Three selectable mail layouts: split (three-pane), focused list, and reading pane at bottom
+- Draft auto-save with identity preservation, persisted HTML body, and proper `In-Reply-To` / `References` headers on replies
+- Attachment upload, download, drag-out to local file system, and inline preview; image thumbnails and forgotten-attachment warning
+- Full-text search with JMAP filter panel, search chips, wildcards, OR conditions, and cross-mailbox queries
+- Batch operations – multi-select, archive, delete, move, tag
+- Archive modes – direct, by year, or by month
+- Multi-tag support with color labels, reordering, and drag-and-drop assignment
+- Star/unstar with configurable mark-as-read delay
+- Virtual scrolling for large mailboxes plus prefetching of initial email data on login
+- Quick reply, hover actions, sender avatars (favicon-based), and recipient popovers
+- Plain-text composer mode and Reply-To support
+- Configurable signature position (above or below quoted text) per identity
+- From-header override in the composer with optional catch-all auto-reply: replies to an alias on a domain you own auto-fill the alias as the sender even when it isn't a configured identity
+- `.eml` file import via folder right-click menu
+- TNEF (`winmail.dat`) extraction and `message/rfc822` unwrapping
+- Folder management with icon picker, subfolders, and sidebar counts
+- Print directly from the viewer
+- Browser history sync for back/forward navigation
+
+## Calendar
+
+- Month, week, day, and agenda views with a mini-calendar sidebar and task list
+- Drag-to-reschedule, click-drag creation, and edge-resize with 15-minute snap
+- Recurring events with scoped edit/delete (this / this and following / all)
+- iMIP invitations on create and update (RFC 5545 / 6047), organizer/attendee UI, and RSVP with trust assessment
+- Inline calendar invitations in the email viewer – auto-detect `.ics`, RSVP, import
+- iCalendar import with preview, bulk create, and UID deduplication
+- iCal / webcal subscriptions with editing and batch import
+- Auto-generated birthday calendar from contacts
+- Virtual locations (video conference URLs) as first-class event fields
+- Task management with due dates, priority, and completion status
+- Shared calendars with CalDAV discovery and multi-account home resolution
+- Week numbers, event hover preview, notifications with sound picker
+- Real-time sync via JMAP push
+
+## Contacts
+
+- JMAP sync (RFC 9553 / 9610) with local fallback
+- Multiple address books with drag-and-drop between books
+- Contact groups with member management
+- vCard import/export (RFC 6350) with duplicate detection
+- Trusted senders stored in a dedicated JMAP address book
+- Autocomplete in the composer (To / Cc / Bcc)
+
+## Filters & Templates
+
+- Server-side filters via JMAP Sieve Scripts (RFC 9661)
+- Visual rule builder with expanded view; conditions (From, To, Subject, Size, Body…) and actions (Move, Forward, Star, Discard…)
+- Preserves rules authored in other clients
+- Raw Sieve editor with syntax validation
+- Vacation responder with date range scheduling
+- Reusable email templates with placeholder auto-fill (`{{recipientName}}`, `{{date}}`, …)
+
+## Files
+
+- JMAP FileNode browser (Stalwart native cloud storage)
+- Streamed WebDAV PUT upload and folder upload with progress tracking
+- Dynamic upload limits based on server configuration
+- Grid and list views with sorting by name, size, or date
+- Previews for images, text, audio, and video
+- Clipboard operations (cut, copy, paste, duplicate), favorites, and recent files
+
+## Security & Privacy
+
+- External content blocked by default, with a trusted senders list
+- HTML sanitization via DOMPurify
+- S/MIME – manage certificates, sign, encrypt, decrypt, and verify; legacy 3DES / PBE support; per-account key isolation
+- SPF / DKIM / DMARC status indicators
+- OAuth2 / OIDC with PKCE (Keycloak, Authentik, or built-in), OAuth-only mode, OAuth app passwords, and non-interactive SSO for embedded deployments
+- TOTP two-factor authentication
+- Account security panel for password and 2FA management via the Stalwart admin API
+- Optional "Remember me" via AES-256-GCM encrypted httpOnly cookie
+- Enforced CSP with per-request nonce, SSRF redirect validation, PDF iframe sandbox, and IP spoofing prevention
+- Plugin hardening with dangerous-pattern detection and admin approval
+- Newsletter unsubscribe (RFC 2369)
+
+## Interface
+
+- Selectable mail layouts (split three-pane, focused list, reading pane at bottom) with resizable columns
+- Dark and light themes with intelligent email color transformation
+- Responsive desktop, tablet, and mobile layouts
+- Full keyboard navigation
+- Drag-and-drop email organization and tag assignment
+- Interactive guided tour for new users
+- Right-click context menus, toast notifications with undo
+- Customizable toolbar position, favicon, and login branding
+- Pinnable sidebar apps with drag-and-drop reordering
+- Encrypted settings sync across devices
+- Storage quota display
+- WCAG AA contrast, reduced-motion support, focus trap, and screen reader live regions
+
+## Internationalization
+
+17 languages: Česky · Dansk · Deutsch · English · Español · Français · Italiano · Latviešu · Nederlands · Polski · Português · Türkçe · Русский · Українська · 한국어 · 日本語 · 简体中文
+
+Automatic browser detection with persistent preference. Configurable locale URL prefix via `NEXT_PUBLIC_LOCALE_PREFIX`.
+
+## Identity & Multi-Account
+
+- Multiple simultaneous accounts with instant switching and per-account session persistence; the 5-account cap is lifted on HTTP/2 servers (limited by browser connection pooling on HTTP/1.1)
+- Account switcher with connection status and default account selection
+- Multiple sender identities with per-identity signatures, automatic sync, and badges in viewer/list
+- Configurable signature position (above or below quoted text)
+- Sub-addressing (`user+tag@domain.com`) with configurable delimiter and contextual tag suggestions
+- Shared folders across accounts
+- Multiple JMAP servers per deployment with optional auto-pick by email domain
+- Optional custom JMAP endpoints on the login form (`ALLOW_CUSTOM_JMAP_ENDPOINT`)
+
+## Admin & Extensibility
+
+- Web setup wizard for first launch – guides through JMAP server(s), OAuth/OIDC, session secret, logging, branding (with file upload), and admin password; persists to the admin config dir, no `.env.local` editing required
+- Stalwart admin dashboard with dedicated policy sections, collapsed into a single tabbed page
+- Split admin storage: `ADMIN_CONFIG_DIR` (operator-authored, mountable read-only after setup) and `ADMIN_STATE_DIR` (runtime audit log and login timestamps)
+- Plugin system – schema-driven config UI, render and intercept hooks, `onAvatarResolve`, `onBeforeEmailSend`, composer-sidebar and email-banner slots, calendar event slots, i18n APIs, and managed policy enforcement
+- Plugin hot-reload and dev-folder loading, on-demand `src/` bundling via esbuild, and `http:fetch` permission with `httpOrigins`
+- Themes – upload, enforce, and manage admin-controlled themes as ZIP bundles
+- Extension marketplace – browse and install plugins and themes from a configurable directory (`EXTENSION_DIRECTORY_URL`); install/uninstall restricted to the admin dashboard
+- Bundled plugins including Jitsi Meet calendar integration
+
+## Operations
+
+- Progressive Web App with service worker, install prompt, web push notifications for inbox mail, and dynamic manifest
+- Automatic update check with server-side logging of new releases and a non-dismissible update notice
+- Structured logging (`text` or `json`) with category-based levels
+- Anonymous instance telemetry (opt-out via admin UI or `BULWARK_TELEMETRY=off`) – version, platform, bucketed account counts, feature toggles only
+- Release (`main`) and development (`dev`) Docker images on GHCR
+- Subpath deployment via `NEXT_PUBLIC_BASE_PATH` for mounting behind a reverse proxy
+- Demo mode with fixture data – no mail server required

README.md

@@ -8,264 +8,155 @@
 
 # Bulwark Webmail
 
-A modern, self-hosted webmail client for [Stalwart Mail Server](https://stalw.art/).<br/>
-Built with Next.js and the JMAP protocol.
+A modern, self-hosted webmail client for [Stalwart Mail Server](https://stalw.art/), built with Next.js and the JMAP protocol.
 
-[![License: AGPL v3](https://img.shields.io/badge/license-AGPL%20v3-blue.svg)](LICENSE)
-[![Version](https://img.shields.io/badge/version-1.4.3-green.svg)](CHANGELOG.md)
-[![Docker](https://img.shields.io/badge/docker-ghcr.io%2Fbulwarkmail%2Fwebmail-blue)](https://ghcr.io/bulwarkmail/webmail)
+[![License: AGPL v3](https://img.shields.io/badge/license-AGPL%20v3-blue.svg?logo=gnu&logoColor=white)](LICENSE)
+[![Discord](https://img.shields.io/discord/1482128142939455674?color=7289da&label=discord&logo=discord&logoColor=white)](https://discord.gg/tYCujymGrT)
+[![Version](https://img.shields.io/badge/version-1.7.1-green.svg?logo=git&logoColor=white)](CHANGELOG.md)
+[![Docker](https://img.shields.io/badge/docker-ghcr.io%2Fbulwarkmail%2Fwebmail-blue?logo=docker&logoColor=white)](https://ghcr.io/bulwarkmail/webmail)
+[![Grafana](https://img.shields.io/badge/grafana-dashboard-orange?logo=grafana&logoColor=white)](https://grafana.external.bulwarkmail.org/)
 
 </div>
 
 ---
 
+## Installer
+
+New in **1.6.4**: a web-based setup wizard runs on first launch – no `.env.local` editing, no shelling into the container.
+
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="screenshots/installer-dark.png" />
+  <img src="screenshots/installer.png" alt="Setup wizard" width="100%" />
+</picture>
+
+Point a browser at the running container and the wizard guides you through:
+
+- **Server** – probe one or more JMAP endpoints, optional auto-pick by email domain, Stalwart feature toggle
+- **Auth** – OAuth2 / OIDC discovery and validation, or basic-auth fallback
+- **Security** – generate or paste a `SESSION_SECRET`, opt into settings sync
+- **Logging** – text or JSON, level
+- **Branding** – upload favicon, app logos, login logos, and company / legal URLs
+- **Review** – grouped summary with an advanced toggle for the full config
+- **Admin** – set the initial admin password and optionally drop a `.config-locked` marker so the config volume can be remounted read-only
+
+The wizard writes to `ADMIN_CONFIG_DIR` (`./data/admin` by default). Setting `JMAP_SERVER_URL` in the environment skips the wizard and uses env-managed configuration instead.
+
+---
+
 ## Screenshots
 
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="screenshots/mail-dark.png" />
+  <img src="screenshots/mail-white.png" alt="Mail view" width="100%" />
+</picture>
+
 <table>
 <tr>
-<td width="50%">
-
-<img src="screenshots/inbox.png" width="100%" alt="Inbox — three-pane layout with sidebar, email list, and viewer (dark mode)">
-
-**Mail** — Three-pane layout with sidebar, email list, and viewer
-
-</td>
-<td width="50%">
-
-<img src="screenshots/calendar.png" width="100%" alt="Calendar">
-
-**Calendar** — Month, week, day, and agenda views with event management
-
-</td>
+<td width="50%"><img src="screenshots/calendar.png" alt="Calendar" /></td>
+<td width="50%"><img src="screenshots/contacts.png" alt="Contacts" /></td>
 </tr>
 <tr>
-<td width="50%">
-
-<img src="screenshots/contacts.png" width="100%" alt="Contacts">
-
-**Contacts** — Contact management with groups and vCard support
-
-</td>
-<td width="50%">
-
-<img src="screenshots/files.png" width="100%" alt="File browser">
-
-**Files** — Cloud file browser with upload, preview, and folder navigation
-
-</td>
+<td><sub><b>Calendar</b> – month, week, day, and agenda views with drag-to-reschedule, iMIP invitations, and CalDAV subscriptions.</sub></td>
+<td><sub><b>Contacts</b> – multiple address books, groups, vCard import/export, and autocomplete in the composer.</sub></td>
+</tr>
+<tr>
+<td><img src="screenshots/theme.png" alt="Themes" /></td>
+<td><img src="screenshots/plugins.png" alt="Plugins" /></td>
+</tr>
+<tr>
+<td><sub><b>Themes</b> – bundled color themes or upload your own as ZIP bundles; admins can enforce presets.</sub></td>
+<td><sub><b>Plugins</b> – extend the client with bundled or third-party plugins installed from a .zip file.</sub></td>
+</tr>
+<tr>
+<td><img src="screenshots/mail-white.png" alt="Light mode" /></td>
+<td><img src="screenshots/settings.png" alt="Settings" /></td>
+</tr>
+<tr>
+<td><sub><b>Light mode</b> – full theme support with intelligent color transformation for HTML emails.</sub></td>
+<td><sub><b>Settings</b> – appearance, identities, filters, templates, security, and more.</sub></td>
 </tr>
 </table>
 
-<details>
-<summary>More screenshots</summary>
-<table>
-<tr>
-<td width="50%">
+## Overview
 
-<img src="screenshots/inbox%20whitemode.png" width="100%" alt="Inbox — light mode">
+Bulwark is a full webmail suite, not just an inbox. It bundles the four apps most self-hosters end up wanting on the same login:
 
-**Light mode** — Full theme support with intelligent color transformation
+- **Mail** – threading, unified inbox, full-text search, Sieve filters, S/MIME, templates
+- **Calendar** – month/week/day/agenda, recurring events, iMIP invitations, CalDAV subscriptions
+- **Contacts** – multiple address books, groups, vCard import/export
+- **Files** – Stalwart's JMAP FileNode storage with previews and folder upload
 
-</td>
-<td width="50%">
+Plus the infrastructure around them: a web setup wizard, OAuth2 / OIDC SSO, TOTP 2FA, multi-account with HTTP/2 connection pooling, 15 languages, PWA install, dark/light themes, a plugin system with an extension marketplace, and an admin dashboard.
 
-<img src="screenshots/settings.png" width="100%" alt="Settings">
-
-**Settings** — Appearance, identities, filters, templates, and more
-
-</td>
-</tr>
-<tr>
-<td width="50%">
-
-<img src="screenshots/login.png" width="100%" alt="Login page">
-
-**Login** — Configurable branding with OAuth2/OIDC and 2FA support
-
-</td>
-<td width="50%">
-</td>
-</tr>
-</table>
-</details>
-
-## Features
-
-### Mail
-
-- **Read, compose, reply, reply-all, forward** with rich HTML rendering
-- **Threading** — Gmail-style inline expansion with thread navigation
-- **Draft auto-save** with discard confirmation
-- **Attachments** — upload, download, and inline preview
-- **Search** — full-text with JMAP filter panel, search chips, cross-mailbox queries, wildcard support, and OR conditions
-- **Batch operations** — multi-select with checkboxes, archive, delete, move, tag
-- **Archive modes** — archive directly or organize archived mail by year or month
-- **Print** emails directly from the viewer
-- **Color tags/labels** and star/unstar
-- **Virtual scrolling** for large mailboxes
-- **Quick reply** from the viewer
-- **Sender avatars** — favicon-based with negative caching for performance
-- **Recipient popover** for quick contact interaction
-- **TNEF support** — extract Outlook `winmail.dat` message bodies and attachments automatically
-- **Folder management** — create, rename, delete folders with icon picker and subfolder support
-- **Tag counts** — unread and total counts displayed in sidebar
-
-### Calendar
-
-- **Month, week, day, and agenda views** with mini-calendar sidebar
-- **Event hover preview** popover with details
-- **Drag-and-drop rescheduling**, click-drag creation, edge-resize (15-min snap)
-- **Recurring events** with edit/delete scope (this / this and following / all)
-- **Participant scheduling** — iTIP invitations, organizer/attendee UI, RSVP
-- **Inline calendar invitations** in email viewer — auto-detect `.ics`, RSVP, import
-- **iCalendar import** with preview and bulk create
-- **Notifications** with configurable sound and alert persistence
-- **Real-time sync** via JMAP push
-
-### Contacts
-
-- **Contact management** with JMAP sync (RFC 9553/9610) and local fallback
-- **Contact groups** with group expansion and member management
-- **vCard import/export** (RFC 6350) with duplicate detection
-- **Autocomplete** in composer (To/Cc/Bcc)
-- **Bulk operations** — multi-select, delete, group add, export
-
-### Filters & Automation
-
-- **Server-side email filters** via JMAP Sieve Scripts (RFC 9661)
-- **Visual rule builder** — conditions (From, To, Subject, Size, Body…) and actions (Move, Forward, Star, Discard…)
-- **Raw Sieve editor** with syntax validation
-- **Vacation responder** with date range scheduling and sidebar indicator
-- **Email templates** — reusable, categorized, with placeholder auto-fill (`{{recipientName}}`, `{{date}}`, etc.)
-
-### Files
-
-- **File browser** with JMAP FileNode cloud storage (Stalwart native)
-- **Upload and download** files with progress tracking and folder upload support
-- **Folder navigation** with breadcrumb path and tree sidebar
-- **Grid and list views** with sorting by name, size, or date
-- **Clipboard operations** — cut, copy, paste, duplicate files
-- **File preview** for images, text, audio, video, and more
-- **Favorites and recent files** for quick access
-- **Bulk operations** — multi-select, delete, move, download
-
-### Security & Privacy
-
-- **External content blocked** by default — trusted senders list for auto-load
-- **HTML sanitization** via DOMPurify with XSS prevention
-- **S/MIME** — manage certificates, sign outgoing mail, encrypt to recipients, decrypt messages, and verify signatures
-- **SPF/DKIM/DMARC** status indicators
-- **OAuth2/OIDC with PKCE** for SSO (Keycloak, Authentik, or built-in), with OAuth-only mode
-- **TOTP two-factor authentication**
-- **Account security panel** — manage passwords and 2FA via Stalwart admin API
-- **"Remember me"** — AES-256-GCM encrypted httpOnly cookie (opt-in)
-- **Security headers** — CSP with per-request nonce, X-Frame-Options, Referrer-Policy
-- **Newsletter unsubscribe** (RFC 2369)
-
-### Interface
-
-- **Three-pane layout** — sidebar, email list, viewer with resizable columns
-- **Dark and light themes** with intelligent email color transformation
-- **Always-light email rendering** option for problematic HTML messages in dark theme
-- **Responsive** — desktop sidebar + mobile bottom tab bar with tablet support
-- **Keyboard shortcuts** — full navigation without a mouse
-- **Drag-and-drop** email organization between mailboxes and tag assignment
-- **Right-click context menus**, toast notifications with undo, form validation with shake feedback
-- **Customizable toolbar** position, custom favicon, sidebar/login logos, and login page branding
-- **Sidebar apps** — pin custom tools to the navigation rail and open them inline or in a new tab
-- **Settings sync** — preferences synchronized with the server (encrypted)
-- **Storage quota** display
-- **Shared folders** — multi-account access
-- **Accessibility** — WCAG AA contrast, reduced-motion support, focus trap, screen reader live regions
-
-### Internationalization
-
-8 languages: English · Français · 日本語 · Español · Italiano · Deutsch · Nederlands · Português
-
-Automatic browser detection with persistent preference.
-
-### Identity Management
-
-- **Multiple sender identities** with per-identity signatures
-- **Identity refresh** — keep the identity manager aligned with server-side changes after edits
-- **Sub-addressing** — `user+tag@domain.com` with contextual tag suggestions
-- **Identity badges** in viewer and email list
-
-### Operations
-
-- **Automatic update check** — server logs when a newer release is available
+Full feature list: **[FEATURES.md](FEATURES.md)**.
 
 ---
 
 ## Quick Start
 
-### Docker (recommended)
+### Docker
 
 ```bash
-docker run -d -p 3000:3000 \
-  -e JMAP_SERVER_URL=https://mail.example.com \
-  ghcr.io/bulwarkmail/webmail:latest
+docker run -d -p 3000:3000 ghcr.io/bulwarkmail/webmail:latest
 ```
 
 Or with Docker Compose:
 
 ```bash
-cp .env.example .env.local
-# Edit .env.local — set JMAP_SERVER_URL
 docker compose up -d
 ```
 
+On first launch, open `http://localhost:3000` – the **web setup wizard** walks you through JMAP server, OAuth, branding, and the admin password. No `.env.local` editing required. Existing installs that already define `JMAP_SERVER_URL` in their environment skip the wizard and keep the env-managed flow described under [Configuration](#configuration).
+
 ### From Source
 
 ```bash
 git clone https://github.com/bulwarkmail/webmail.git
 cd webmail
 npm install
-cp .env.example .env.local
-# Edit .env.local — set JMAP_SERVER_URL
 npm run build && npm start
+# Then open http://localhost:3000 to run the setup wizard
 ```
 
 ### Development
 
 ```bash
-npm run dev        # Start dev server (mock JMAP server included)
-npm run typecheck  # Type checking
-npm run lint       # Linting
+npm run dev        # Dev server with a mock JMAP server
+npm run typecheck
+npm run lint
 ```
 
 ## Configuration
 
-Edit `.env.local`:
+Most deployments are configured through the **setup wizard** (on first launch) and the **admin dashboard** thereafter; values are written to the admin config directory rather than `.env.local`. Environment variables remain supported for operators who prefer file-driven configuration or read-only / immutable infrastructure. When an environment variable is set, it takes precedence over the corresponding admin-managed value, so setting `JMAP_SERVER_URL` will hide that field from the wizard and lock it in the admin UI.
+
+All variables are evaluated at runtime, so Docker deployments can be reconfigured without rebuilding. Edit `.env.local`:
 
 ```env
-# Required
+# Optional – overrides whatever the wizard writes
 JMAP_SERVER_URL=https://mail.example.com
-
-# Optional
 APP_NAME=My Webmail
 ```
 
-All variables are **runtime** — Docker deployments can be configured without rebuilding.
-
 <details>
-<summary>Server Listen Address</summary>
+<summary>Server listen address</summary>
 
 ```env
 HOSTNAME=0.0.0.0    # Default; use "::" for IPv6
-PORT=3000            # Default listen port
+PORT=3000
 ```
 
 </details>
 
 <details>
-<summary>OAuth2/OIDC (SSO)</summary>
+<summary>OAuth2 / OIDC</summary>
 
 ```env
 OAUTH_ENABLED=true
 OAUTH_CLIENT_ID=webmail
 OAUTH_CLIENT_SECRET=              # optional, for confidential clients
-OAUTH_ISSUER_URL=                 # optional, for external IdPs (Keycloak, Authentik)
+OAUTH_CLIENT_SECRET_FILE=         # path to a file containing the secret
+OAUTH_ISSUER_URL=                 # optional, for external IdPs
 ```
 
 Endpoints are auto-discovered via `.well-known/oauth-authorization-server` or `.well-known/openid-configuration`.
@@ -273,13 +164,110 @@ Endpoints are auto-discovered via `.well-known/oauth-authorization-server` or `.
 </details>
 
 <details>
-<summary>Remember Me</summary>
+<summary>Session & settings sync</summary>
 
 ```env
-SESSION_SECRET=your-secret-key    # Generate with: openssl rand -base64 32
+SESSION_SECRET=                      # openssl rand -base64 32
+SESSION_SECRET_FILE=/session-secret  # path to a file containing the secret
+
+SETTINGS_SYNC_ENABLED=true
+SETTINGS_DATA_DIR=./data/settings    # mount as a volume in Docker
 ```
 
-Credentials encrypted with AES-256-GCM, stored in an httpOnly cookie (30-day expiry).
+Credentials are encrypted with AES-256-GCM and stored in an httpOnly cookie (30-day expiry). Settings sync stores per-account preferences encrypted at rest and requires `SESSION_SECRET`.
+
+</details>
+
+<details>
+<summary>Custom JMAP endpoint</summary>
+
+```env
+ALLOW_CUSTOM_JMAP_ENDPOINT=true
+```
+
+Shows a "JMAP Server" field on the login form. External servers must CORS-allow the webmail origin.
+
+</details>
+
+<details>
+<summary>Branding & PWA</summary>
+
+```env
+APP_NAME=My Webmail
+APP_SHORT_NAME=Webmail
+APP_DESCRIPTION=Your personal mail
+
+FAVICON_URL=/branding/favicon.svg
+PWA_ICON_URL=/branding/icon.svg      # falls back to FAVICON_URL
+PWA_THEME_COLOR=#3b82f6
+PWA_BACKGROUND_COLOR=#ffffff
+
+APP_LOGO_LIGHT_URL=/branding/logo-light.svg
+APP_LOGO_DARK_URL=/branding/logo-dark.svg
+LOGIN_LOGO_LIGHT_URL=/branding/login-light.svg
+LOGIN_LOGO_DARK_URL=/branding/login-dark.svg
+
+LOGIN_COMPANY_NAME=My Company
+LOGIN_WEBSITE_URL=https://example.com
+LOGIN_IMPRINT_URL=https://example.com/imprint
+LOGIN_PRIVACY_POLICY_URL=https://example.com/privacy
+```
+
+</details>
+
+<details>
+<summary>Extension directory</summary>
+
+```env
+EXTENSION_DIRECTORY_URL=https://extensions.bulwarkmail.org
+```
+
+Enables the admin marketplace for browsing and installing plugins and themes.
+
+</details>
+
+<details>
+<summary>Stalwart integration & logging</summary>
+
+```env
+STALWART_FEATURES=true               # password change, Sieve filters, etc.
+
+LOG_FORMAT=text                      # "text" or "json"
+LOG_LEVEL=info                       # error | warn | info | debug
+```
+
+</details>
+
+<details>
+<summary>Admin data directories</summary>
+
+```env
+ADMIN_CONFIG_DIR=./data/admin        # operator-authored: config.json, policy.json, plugins/, themes/
+ADMIN_STATE_DIR=./data/admin-state   # runtime: audit log, login timestamps, setup token
+ADMIN_CONFIG_READONLY=true           # enforce read-only mode at the app layer
+```
+
+The split lets you mount the config volume read-only after the setup wizard completes. Legacy installs that pre-date the split keep working through `ADMIN_DATA_DIR`.
+
+</details>
+
+<details>
+<summary>Subpath / reverse proxy mount</summary>
+
+To serve the webmail at a subpath (e.g. `https://example.com/webmail`):
+
+```env
+NEXT_PUBLIC_BASE_PATH=/webmail
+NEXT_PUBLIC_LOCALE_PREFIX=always     # avoids next-intl rewrite loops
+```
+
+Unlike most other variables, `NEXT_PUBLIC_BASE_PATH` is read at **build time** because Next.js bakes it into emitted asset URLs. To use it with the published Docker image, build your own image with the variable set:
+
+```bash
+docker build --build-arg NEXT_PUBLIC_BASE_PATH=/webmail -t bulwark-webmail .
+```
+
+Then point your reverse proxy at the container without stripping the prefix - the app expects to receive requests under `/webmail/...` and serves all routes (`/webmail/api/...`, `/webmail/_next/static/...`, `/webmail/sw.js`, etc.) accordingly.
 
 </details>
 
@@ -313,23 +301,16 @@ Credentials encrypted with AES-256-GCM, stored in an httpOnly cookie (30-day exp
 
 ## Why Stalwart?
 
-[Stalwart](https://github.com/stalwartlabs/mail-server) is a mail server written in Rust with **native JMAP support** — not IMAP/SMTP with JMAP bolted on. It handles JMAP, IMAP, SMTP, and ManageSieve in a single binary. Self-hosted, no third-party dependencies.
+[Stalwart](https://github.com/stalwartlabs/mail-server) is a Rust mail server with native JMAP support – not IMAP/SMTP with JMAP bolted on. It handles JMAP, IMAP, SMTP, and ManageSieve in a single self-hosted binary with no third-party dependencies.
 
 ## Contributing
 
-See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.
-
-## Roadmap
-
-See [ROADMAP.md](ROADMAP.md) for planned features and current status.
+See [CONTRIBUTING.md](CONTRIBUTING.md).
 
 ## License
 
-[GNU AGPL v3](LICENSE)
-
-This repository also preserves the original MIT attribution notice for the
-fork lineage in [NOTICE](NOTICE).
+[GNU AGPL v3](LICENSE). This repository preserves the original MIT attribution for the fork lineage in [NOTICE](NOTICE).
 
 ## Acknowledgments
 
-Thanks to [root-fr/jmap-webmail](https://github.com/root-fr/jmap-webmail/) and [@ma2t](https://github.com/ma2t) for doing most of the groundwork that this project builds upon.
+Thanks to [root-fr/jmap-webmail](https://github.com/root-fr/jmap-webmail/) and [@ma2t](https://github.com/ma2t) for the groundwork this project builds upon.

VERSION

@@ -1 +1 @@
-1.4.4
+1.7.1

app/(main)/[...rest]/page.tsx

@@ -0,0 +1,10 @@
+import { notFound } from 'next/navigation';
+
+// Catch-all that anchors unmatched URLs into the (main) route group so
+// Next renders app/(main)/not-found.tsx (wrapped by (main)/layout.tsx)
+// instead of the built-in __next_builtin__not-found page. Without this,
+// route groups can't pick a root layout for URLs that match nothing, so
+// 404s render bare.
+export default function CatchAll() {
+  notFound();
+}

app/(main)/[locale]/auth/callback/page.tsx

@@ -0,0 +1,217 @@
+"use client";
+
+import { Suspense, useEffect, useState } from "react";
+import { useRouter, useSearchParams } from "next/navigation";
+import { useTranslations } from "next-intl";
+import { useAuthStore } from "@/stores/auth-store";
+import { getPathPrefix } from "@/lib/browser-navigation";
+import { Loader2, AlertCircle } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { useParams } from "next/navigation";
+
+function OAuthCallbackInner() {
+  const router = useRouter();
+  const params = useParams();
+  const searchParams = useSearchParams();
+  const t = useTranslations("login");
+  const { loginWithOAuth, loginWithServerSso } = useAuthStore();
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    const code = searchParams.get("code");
+    const state = searchParams.get("state");
+    const errorParam = searchParams.get("error");
+
+    if (errorParam) {
+      setError(errorParam === "access_denied" ? "access_denied" : "token_exchange_failed");
+      return;
+    }
+
+    if (!code) {
+      setError("missing_params");
+      return;
+    }
+
+    const savedState = sessionStorage.getItem("oauth_state");
+
+    if (savedState) {
+      // Classic flow - sessionStorage has the PKCE state (same-tab OAuth)
+      if (!state || state !== savedState) {
+        setError("invalid_state");
+        return;
+      }
+
+      const codeVerifier = sessionStorage.getItem("oauth_code_verifier");
+      const serverUrl = sessionStorage.getItem("oauth_server_url");
+      const serverId = sessionStorage.getItem("oauth_server_id") || undefined;
+
+      if (!codeVerifier || !serverUrl) {
+        setError("missing_params");
+        return;
+      }
+
+      const prefix = getPathPrefix(params.locale as string);
+      const redirectUri = `${window.location.origin}${prefix}/${params.locale}/auth/callback`;
+
+      loginWithOAuth(serverUrl, code, codeVerifier, redirectUri, serverId)
+        .then((success) => {
+          if (success) {
+            sessionStorage.removeItem("oauth_state");
+            sessionStorage.removeItem("oauth_code_verifier");
+            sessionStorage.removeItem("oauth_server_url");
+            sessionStorage.removeItem("oauth_server_id");
+            sessionStorage.removeItem("oauth_add_account_mode");
+            let redirectTo = `${prefix}/${params.locale}`;
+            try {
+              const saved = sessionStorage.getItem('redirect_after_login');
+              if (saved) {
+                sessionStorage.removeItem('redirect_after_login');
+                redirectTo = saved;
+              }
+            } catch { /* sessionStorage may be unavailable */ }
+            router.push(redirectTo);
+          } else {
+            setError("token_exchange_failed");
+          }
+        })
+        .catch(() => {
+          setError("token_exchange_failed");
+        });
+    } else if (state) {
+      // Server-side SSO flow - state was stored in encrypted httpOnly cookie.
+      // Branch on mobile handoff first: the login page left a marker in
+      // sessionStorage if it kicked this OAuth dance off for the mobile app.
+      let mobileRedirectUri: string | null = null;
+      let mobileState: string | null = null;
+      try {
+        mobileRedirectUri = sessionStorage.getItem("mobile_redirect_uri");
+        mobileState = sessionStorage.getItem("mobile_state");
+      } catch { /* sessionStorage may be unavailable */ }
+
+      if (mobileRedirectUri && mobileRedirectUri.startsWith("bulwarkmobile://")) {
+        // Drive /api/auth/sso/complete directly so we can read the tokens
+        // out of the response - loginWithServerSso would consume them and
+        // wire up the webmail auth store, which isn't useful here. The
+        // server's mobile-flow branch (keyed on the pending cookie) skips
+        // the refresh-token cookie write for the same reason.
+        (async () => {
+          try {
+            const res = await fetch("/api/auth/sso/complete", {
+              method: "POST",
+              headers: { "Content-Type": "application/json" },
+              credentials: "include",
+              body: JSON.stringify({ code, state }),
+            });
+            if (!res.ok) {
+              setError("token_exchange_failed");
+              return;
+            }
+            const data = await res.json();
+            const serverUrl = data.server_url as string | undefined;
+            const accessToken = data.access_token as string | undefined;
+            const tokenEndpoint = data.token_endpoint as string | undefined;
+            const clientId = data.client_id as string | undefined;
+            if (!serverUrl || !accessToken || !tokenEndpoint || !clientId) {
+              setError("token_exchange_failed");
+              return;
+            }
+            const fragment = new URLSearchParams({
+              flow: "oauth",
+              server_url: serverUrl,
+              access_token: accessToken,
+              token_endpoint: tokenEndpoint,
+              client_id: clientId,
+              state: mobileState ?? "",
+            });
+            if (typeof data.refresh_token === "string") {
+              fragment.set("refresh_token", data.refresh_token);
+            }
+            if (typeof data.expires_in === "number") {
+              fragment.set("expires_in", String(data.expires_in));
+            }
+            try {
+              sessionStorage.removeItem("mobile_redirect_uri");
+              sessionStorage.removeItem("mobile_state");
+            } catch { /* ignore */ }
+            window.location.replace(`${mobileRedirectUri}#${fragment.toString()}`);
+          } catch {
+            setError("token_exchange_failed");
+          }
+        })();
+        return;
+      }
+
+      const ssoPrefix = getPathPrefix(params.locale as string);
+      loginWithServerSso(code, state)
+        .then((success) => {
+          if (success) {
+            let redirectTo = `${ssoPrefix}/${params.locale}`;
+            try {
+              const saved = sessionStorage.getItem('redirect_after_login');
+              if (saved) {
+                sessionStorage.removeItem('redirect_after_login');
+                redirectTo = saved;
+              }
+            } catch { /* sessionStorage may be unavailable */ }
+            router.push(redirectTo);
+          } else {
+            setError("token_exchange_failed");
+          }
+        })
+        .catch(() => {
+          setError("token_exchange_failed");
+        });
+    } else {
+      setError("invalid_state");
+    }
+  }, []); // eslint-disable-line react-hooks/exhaustive-deps
+
+  if (error) {
+    return (
+      <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-background via-background to-muted/20">
+        <div className="w-full max-w-sm mx-auto px-4 text-center">
+          <div className="inline-flex items-center justify-center w-20 h-20 rounded-2xl bg-red-500/10 mb-6">
+            <AlertCircle className="w-10 h-10 text-red-500" />
+          </div>
+          <h1 className="text-xl font-medium text-foreground mb-2">
+            {t("oauth_error.title")}
+          </h1>
+          <p className="text-muted-foreground text-sm mb-6">
+            {t(`oauth_error.${error}`)}
+          </p>
+          <Button
+            variant="outline"
+            onClick={() => router.push(`${getPathPrefix(params.locale as string)}/${params.locale}/login`)}
+          >
+            {t("oauth_error.back_to_login")}
+          </Button>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-background via-background to-muted/20">
+      <div className="w-full max-w-sm mx-auto px-4 text-center" role="status">
+        <Loader2 className="w-8 h-8 animate-spin text-primary mx-auto mb-4" />
+        <p className="text-muted-foreground text-sm">{t("oauth_completing")}</p>
+      </div>
+    </div>
+  );
+}
+
+export default function OAuthCallbackPage() {
+  return (
+    <Suspense
+      fallback={
+        <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-background via-background to-muted/20">
+          <div className="w-full max-w-sm mx-auto px-4 text-center" role="status">
+            <Loader2 className="w-8 h-8 animate-spin text-primary mx-auto mb-4" />
+          </div>
+        </div>
+      }
+    >
+      <OAuthCallbackInner />
+    </Suspense>
+  );
+}

app/(main)/[locale]/contacts/page.tsx

@@ -1,9 +1,10 @@
 "use client";
 
 import { useState, useEffect, useCallback, useRef, useMemo } from "react";
-import { useRouter } from "@/i18n/navigation";
 import { useTranslations } from "next-intl";
-import { ArrowLeft, Users } from "lucide-react";
+import { useSearchParams } from "next/navigation";
+import { useRouter } from "@/i18n/navigation";
+import { ArrowLeft, Users, AlertTriangle } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
 import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
@@ -14,19 +15,26 @@ import { ContactGroupForm } from "@/components/contacts/contact-group-form";
 import { ContactGroupDetail } from "@/components/contacts/contact-group-detail";
 import { ContactsSidebar, type ContactCategory } from "@/components/contacts/contacts-sidebar";
 import { ContactImportDialog } from "@/components/contacts/contact-import-dialog";
+import { RenameDialog } from "@/components/files/rename-dialog";
 import { exportContacts } from "@/components/contacts/contact-export";
+import { AppTopBannerSlot } from "@/components/plugins/app-top-banner-slot";
 import { useContactStore, getContactDisplayName } from "@/stores/contact-store";
-import { useAuthStore } from "@/stores/auth-store";
+import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
 import { useEmailStore } from "@/stores/email-store";
+import { usePolicyStore } from "@/stores/policy-store";
 import { toast } from "@/stores/toast-store";
-import { cn } from "@/lib/utils";
+import { cn, generateUUID } from "@/lib/utils";
 import { NavigationRail } from "@/components/layout/navigation-rail";
 import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
 import { InlineAppView } from "@/components/layout/inline-app-view";
 import { useSidebarApps } from "@/hooks/use-sidebar-apps";
+import { useIsEmbedded } from "@/hooks/use-is-embedded";
+import { useProMultiAccountContacts } from "@/hooks/use-pro-multi-account-contacts";
 import { ResizeHandle } from "@/components/layout/resize-handle";
-import { useIsMobile } from "@/hooks/use-media-query";
-import type { ContactCard, AddressBook } from "@/lib/jmap/types";
+import { useIsDesktop, useIsMobile } from "@/hooks/use-media-query";
+import { useRefreshGesture } from "@/hooks/use-refresh-gesture";
+import type { ContactCard, AddressBook, AddressBookRights } from "@/lib/jmap/types";
+import { ShareCollectionDialog } from "@/components/settings/share-collection-dialog";
 
 type View =
   | "list"
@@ -39,8 +47,8 @@ type View =
   | "bulk-add-to-group";
 
 export default function ContactsPage() {
-  const router = useRouter();
   const t = useTranslations("contacts");
+  const contactsEnabled = usePolicyStore((s) => s.isFeatureEnabled('contactsEnabled'));
   const { client, isAuthenticated, logout, checkAuth, isLoading: authLoading } = useAuthStore();
   const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
   const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
@@ -74,16 +82,39 @@ export default function ContactsPage() {
     bulkDeleteContacts,
     bulkAddToGroup,
     moveContactToAddressBook,
+    renameAddressBook,
+    removeAddressBook,
+    shareAddressBook,
+    renameKeyword,
     importContacts,
   } = useContactStore();
 
   const [view, setView] = useState<View>("list");
   const [activeCategory, setActiveCategory] = useState<ContactCategory>("all");
   const [showImportDialog, setShowImportDialog] = useState(false);
+  const [renamingAddressBook, setRenamingAddressBook] = useState<AddressBook | null>(null);
+  const [sharingAddressBookId, setSharingAddressBookId] = useState<string | null>(null);
+  const [defaultBookIdForCreate, setDefaultBookIdForCreate] = useState<string | undefined>(undefined);
+  const [createPrefill, setCreatePrefill] = useState<{ email?: string; name?: string } | undefined>(undefined);
+  const [returnToEmail, setReturnToEmail] = useState(false);
+  const [renamingKeyword, setRenamingKeyword] = useState<string | null>(null);
   const [selectedGroupId, setSelectedGroupId] = useState<string | null>(null);
   const hasFetched = useRef(false);
   const { dialogProps: confirmDialogProps, confirm: confirmDialog } = useConfirmDialog();
   const isMobile = useIsMobile();
+  const isDesktop = useIsDesktop();
+  const isEmbedded = useIsEmbedded();
+  const router = useRouter();
+  const searchParams = useSearchParams();
+  // One-shot intent flag: only consume the URL params on the first render that
+  // has them. After applying, we strip the query so a later refresh or
+  // re-mount doesn't re-trigger the navigation.
+  const intentAppliedRef = useRef(false);
+  // Narrow pane (Pro split or small window): the categories sidebar collapses
+  // into a burger-toggled overlay.
+  const isNarrow = !isDesktop;
+  const [narrowSidebarOpen, setNarrowSidebarOpen] = useState(false);
+  useEffect(() => { if (!isNarrow) setNarrowSidebarOpen(false); }, [isNarrow]);
 
   // Panel resize state - sidebar (categories)
   const [sidebarWidth, setSidebarWidth] = useState(() => {
@@ -94,13 +125,20 @@ export default function ContactsPage() {
 
   // Panel resize state - contact list
   const [listWidth, setListWidth] = useState(() => {
-    try { const v = localStorage.getItem("contacts-list-width"); return v ? Number(v) : 320; } catch { return 320; }
+    try { const v = localStorage.getItem("contacts-list-width"); return v ? Number(v) : 384; } catch { return 384; }
   });
   const [isListResizing, setIsListResizing] = useState(false);
-  const listDragStartWidth = useRef(320);
+  const listDragStartWidth = useRef(384);
 
-  // Check auth on mount
+  // Check auth on mount – skip when already authenticated so that navigating
+  // between routes doesn't retrigger checkAuth's transient `{ client: null,
+  // isLoading: true }` reset, which was flashing the spinner on every nav.
   useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
     checkAuth().finally(() => {
       setInitialCheckDone(true);
     });
@@ -109,26 +147,91 @@ export default function ContactsPage() {
   useEffect(() => {
     if (initialCheckDone && !isAuthenticated && !authLoading) {
       try { sessionStorage.setItem('redirect_after_login', window.location.pathname); } catch { /* ignore */ }
-      router.push("/login");
+      redirectToLogin();
     }
-  }, [initialCheckDone, isAuthenticated, authLoading, router]);
+  }, [initialCheckDone, isAuthenticated, authLoading]);
+
+  // Pro shell only: aggregate contacts and address books from every
+  // connected account so the sidebar lists them all. The hook is a no-op
+  // outside the embedded shell.
+  const { enabled: multiAccountEnabled, accountClients } = useProMultiAccountContacts();
 
   useEffect(() => {
+    if (isEmbedded) return;
     if (client && supportsSync && !hasFetched.current) {
       hasFetched.current = true;
       fetchContacts(client);
     }
-  }, [client, supportsSync, fetchContacts]);
+  }, [client, supportsSync, fetchContacts, isEmbedded]);
+
+  // Consume one-shot URL params (set by the mobile recipient popover when no
+  // sidebar is available) and strip them so a refresh doesn't replay the
+  // intent. `from=email` flips the mobile back button to `router.back()`.
+  useEffect(() => {
+    if (intentAppliedRef.current) return;
+    const contactId = searchParams.get('contactId');
+    const addEmail = searchParams.get('addEmail');
+    const addName = searchParams.get('addName');
+    const from = searchParams.get('from');
+    if (!contactId && !addEmail && !from) return;
+    intentAppliedRef.current = true;
+    if (from === 'email') setReturnToEmail(true);
+    if (contactId) {
+      setSelectedContact(contactId);
+      setView('detail');
+    } else if (addEmail) {
+      setCreatePrefill({ email: addEmail, name: addName ?? undefined });
+      setSelectedContact(null);
+      setView('create');
+    }
+    router.replace('/contacts');
+  }, [searchParams, router, setSelectedContact]);
+
+  // Intercept browser refresh gestures (F5, Ctrl/Cmd+R, pull-to-refresh)
+  // and refresh contacts via JMAP instead of reloading the page.
+  useRefreshGesture({
+    enabled: isAuthenticated && !!client && supportsSync,
+    onRefresh: async () => {
+      if (!client) return;
+      if (multiAccountEnabled && accountClients.length > 0) {
+        const activeId = useAuthStore.getState().activeAccountId;
+        if (activeId) {
+          const { fetchAllAccountsContacts, fetchAllAccountsAddressBooks } = useContactStore.getState();
+          await Promise.all([
+            fetchAllAccountsAddressBooks(accountClients, activeId),
+            fetchAllAccountsContacts(accountClients, activeId),
+          ]);
+          return;
+        }
+      }
+      await fetchContacts(client);
+    },
+  });
 
   const groups = useMemo(() => contacts.filter(c => c.kind === 'group'), [contacts]);
   const individuals = useMemo(() => contacts.filter(c => c.kind !== 'group'), [contacts]);
   const selectedContact = contacts.find((c) => c.id === selectedContactId) || null;
   const selectedGroup = selectedGroupId ? contacts.find(c => c.id === selectedGroupId) || null : null;
-  const selectedGroupMembers = selectedGroupId ? getGroupMembers(selectedGroupId) : [];
+  const selectedGroupMembers = useMemo(() => selectedGroupId ? getGroupMembers(selectedGroupId) : [], [selectedGroupId, getGroupMembers]);
+
+  // Collect all unique keywords across contacts
+  const allKeywords = useMemo(() => {
+    const kws = new Set<string>();
+    for (const contact of individuals) {
+      if (!contact.keywords) continue;
+      for (const [kw, active] of Object.entries(contact.keywords)) {
+        if (active) kws.add(kw);
+      }
+    }
+    return Array.from(kws).sort((a, b) => a.localeCompare(b));
+  }, [individuals]);
 
   // Contacts to display based on active category
   const displayedContacts = useMemo(() => {
     if (activeCategory === "all") return individuals;
+    if (activeCategory === "uncategorized") {
+      return individuals.filter(c => !c.keywords || Object.keys(c.keywords).filter(k => c.keywords![k]).length === 0);
+    }
     if ("addressBookId" in activeCategory) {
       const bookId = activeCategory.addressBookId;
       return individuals.filter(c => {
@@ -143,20 +246,6 @@ export default function ContactsPage() {
     return getGroupMembers(activeCategory.groupId);
   }, [activeCategory, individuals, getGroupMembers]);
 
-  // Label for the current category
-  const categoryLabel = useMemo(() => {
-    if (activeCategory === "all") return t("tabs.all");
-    if ("addressBookId" in activeCategory) {
-      const book = addressBooks.find(b => b.id === activeCategory.addressBookId);
-      return book?.name || t("tabs.all");
-    }
-    if ("keyword" in activeCategory) {
-      return activeCategory.keyword;
-    }
-    const group = contacts.find(c => c.id === activeCategory.groupId);
-    return group ? getContactDisplayName(group) : t("tabs.all");
-  }, [activeCategory, contacts, addressBooks, t]);
-
   const handleSelectCategory = useCallback((category: ContactCategory) => {
     setActiveCategory(category);
     clearSelection();
@@ -166,6 +255,7 @@ export default function ContactsPage() {
     } else {
       setSelectedGroupId(null);
     }
+    setNarrowSidebarOpen(false);
   }, [clearSelection]);
 
   const handleDropContacts = useCallback(async (contactIds: string[], addressBook: AddressBook) => {
@@ -182,6 +272,31 @@ export default function ContactsPage() {
     }
   }, [client, moveContactToAddressBook, t]);
 
+  const handleDropContactsToCategory = useCallback(async (contactIds: string[], keyword: string) => {
+    if (!client && supportsSync) return;
+    try {
+      for (const contactId of contactIds) {
+        const contact = contacts.find(c => c.id === contactId);
+        if (!contact) continue;
+        const existingKeywords = contact.keywords || {};
+        if (existingKeywords[keyword]) continue; // already has this keyword
+        const updatedKeywords = { ...existingKeywords, [keyword]: true };
+        if (supportsSync && client) {
+          await updateContact(client, contactId, { keywords: updatedKeywords });
+        } else {
+          updateLocalContact(contactId, { keywords: updatedKeywords });
+        }
+      }
+      const msg = contactIds.length === 1
+        ? t("category_added", { name: keyword })
+        : t("category_added_plural", { count: contactIds.length, name: keyword });
+      toast.success(msg);
+    } catch (error) {
+      console.error('Failed to add contacts to category:', error);
+      toast.error(t("toast.error_update"));
+    }
+  }, [client, supportsSync, contacts, updateContact, updateLocalContact, t]);
+
   const handleImportContacts = useCallback(async (importedContacts: ContactCard[]) => {
     return importContacts(
       supportsSync && client ? client : null,
@@ -204,9 +319,7 @@ export default function ContactsPage() {
     setView("edit");
   };
 
-  const handleDelete = async () => {
-    if (!selectedContact) return;
-
+  const deleteContactById = useCallback(async (contactId: string) => {
     const confirmed = await confirmDialog({
       title: t("delete_confirm_title"),
       message: t("delete_confirm"),
@@ -217,33 +330,82 @@ export default function ContactsPage() {
 
     try {
       if (supportsSync && client) {
-        await deleteContact(client, selectedContact.id);
+        await deleteContact(client, contactId);
       } else {
-        deleteLocalContact(selectedContact.id);
+        deleteLocalContact(contactId);
       }
       toast.success(t("toast.deleted"));
-      setView("list");
+      if (selectedContactId === contactId) setView("list");
     } catch (error) {
       console.error('Failed to delete contact:', error);
       toast.error(t("toast.error_delete"));
     }
+  }, [confirmDialog, t, supportsSync, client, deleteContact, deleteLocalContact, selectedContactId]);
+
+  const handleDelete = async () => {
+    if (!selectedContact) return;
+    await deleteContactById(selectedContact.id);
   };
 
+  const handleEditContact = useCallback((id: string) => {
+    setSelectedContact(id);
+    setView("edit");
+  }, [setSelectedContact]);
+
+  const handleDeleteContact = useCallback((contact: ContactCard) => {
+    void deleteContactById(contact.id);
+  }, [deleteContactById]);
+
+  const handleAddContactToGroup = useCallback((id: string) => {
+    clearSelection();
+    toggleContactSelection(id);
+    if (groups.length === 0) {
+      setView("group-create");
+      return;
+    }
+    setView("bulk-add-to-group");
+  }, [clearSelection, toggleContactSelection, groups.length]);
+
+  const handleDuplicateContact = useCallback(async (source: ContactCard) => {
+    const { id: _id, created: _created, updated: _updated, ...rest } = source;
+    void _id; void _created; void _updated;
+    const data: Partial<ContactCard> = JSON.parse(JSON.stringify(rest));
+    if (supportsSync && client) {
+      await createContact(client, data);
+      toast.success(t("toast.created"));
+    } else {
+      const localContact: ContactCard = {
+        id: `local-${generateUUID()}`,
+        addressBookIds: data.addressBookIds || {},
+        ...data,
+      };
+      addLocalContact(localContact);
+      toast.success(t("toast.created"));
+    }
+  }, [supportsSync, client, createContact, addLocalContact, t]);
+
   const handleSaveNew = useCallback(async (data: Partial<ContactCard>) => {
     if (supportsSync && client) {
       await createContact(client, data);
       toast.success(t("toast.created"));
     } else {
       const localContact: ContactCard = {
-        id: `local-${crypto.randomUUID()}`,
+        id: `local-${generateUUID()}`,
         addressBookIds: {},
         ...data,
       };
       addLocalContact(localContact);
       toast.success(t("toast.created"));
     }
+    setDefaultBookIdForCreate(undefined);
+    setCreatePrefill(undefined);
+    if (returnToEmail) {
+      setReturnToEmail(false);
+      router.back();
+      return;
+    }
     setView("list");
-  }, [supportsSync, client, createContact, addLocalContact, t]);
+  }, [supportsSync, client, createContact, addLocalContact, t, returnToEmail, router]);
 
   const handleSaveEdit = useCallback(async (data: Partial<ContactCard>) => {
     if (!selectedContact) return;
@@ -259,6 +421,15 @@ export default function ContactsPage() {
   }, [supportsSync, client, selectedContact, updateContact, updateLocalContact, t]);
 
   const handleCancel = () => {
+    setDefaultBookIdForCreate(undefined);
+    // Came from email → cancel returns to the email instead of the contact list.
+    if (returnToEmail && view === "create") {
+      setCreatePrefill(undefined);
+      setReturnToEmail(false);
+      router.back();
+      return;
+    }
+    if (view === "create") setCreatePrefill(undefined);
     if (view === "group-create" || view === "group-edit") {
       setView(selectedGroup ? "group-detail" : "list");
     } else if (view === "bulk-add-to-group") {
@@ -268,7 +439,7 @@ export default function ContactsPage() {
     }
   };
 
-  const handleSelectGroup = (id: string) => {
+  const _handleSelectGroup = (id: string) => {
     setSelectedGroupId(id);
     setActiveCategory({ groupId: id });
     setView("group-detail");
@@ -430,7 +601,7 @@ export default function ContactsPage() {
   const renderRightPanel = () => {
     switch (view) {
       case "create":
-        return <ContactForm addressBooks={addressBooks} onSave={handleSaveNew} onCancel={handleCancel} />;
+        return <ContactForm addressBooks={addressBooks} allKeywords={allKeywords} defaultAddressBookId={defaultBookIdForCreate} prefill={createPrefill} onSave={handleSaveNew} onCancel={handleCancel} />;
 
       case "edit":
         if (!selectedContact) return null;
@@ -438,6 +609,7 @@ export default function ContactsPage() {
           <ContactForm
             contact={selectedContact}
             addressBooks={addressBooks}
+            allKeywords={allKeywords}
             onSave={handleSaveEdit}
             onCancel={handleCancel}
           />
@@ -529,30 +701,60 @@ export default function ContactsPage() {
             contact={selectedContact}
             onEdit={handleEdit}
             onDelete={handleDelete}
+            onAddToGroup={
+              selectedContact
+                ? () => handleAddContactToGroup(selectedContact.id)
+                : undefined
+            }
+            onDuplicate={
+              selectedContact
+                ? () => void handleDuplicateContact(selectedContact)
+                : undefined
+            }
             isMobile={isMobile}
           />
         );
     }
   };
 
+  if (!contactsEnabled) {
+    return (
+      <div className="flex h-dvh items-center justify-center bg-background p-6">
+        <div className="max-w-lg text-center space-y-3">
+          <AlertTriangle className="w-10 h-10 text-yellow-500 mx-auto" />
+          <p className="text-sm font-medium">Contacts feature is disabled by your administrator</p>
+          <p className="text-xs text-muted-foreground">Please contact your administrator if you need access.</p>
+        </div>
+      </div>
+    );
+  }
+
   const showListPanel = !isMobile || view === "list";
   const showRightPanel = !isMobile || view !== "list";
 
   const mobileBackToList = () => {
+    if (returnToEmail) {
+      setReturnToEmail(false);
+      setCreatePrefill(undefined);
+      router.back();
+      return;
+    }
     setView("list");
     clearSelection();
   };
 
   return (
-    <div className="flex h-dvh bg-background overflow-hidden">
-      {/* Navigation Rail - desktop only */}
-      {!isMobile && (
+    <div className={cn("flex flex-col bg-background overflow-hidden pt-[env(safe-area-inset-top)]", isEmbedded ? "h-full" : "h-dvh")}>
+      <AppTopBannerSlot />
+      <div className={cn("flex flex-1 min-h-0 overflow-hidden", isMobile && "flex-col")}>
+      {/* Navigation Rail - desktop only (hidden when embedded in Pro shell) */}
+      {!isMobile && !isEmbedded && (
         <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
           <NavigationRail
             collapsed
             quota={quota}
             isPushConnected={isPushConnected}
-            onLogout={() => { logout(); if (!useAuthStore.getState().isAuthenticated) router.push('/login'); }}
+            onLogout={logout}
             onManageApps={handleManageApps}
             onInlineApp={handleInlineApp}
             onCloseInlineApp={closeInlineApp}
@@ -561,22 +763,37 @@ export default function ContactsPage() {
         </div>
       )}
 
-      <div className="flex flex-col flex-1 min-w-0">
+      <div className="flex flex-col flex-1 min-w-0 min-h-0">
         {inlineApp && (
           <InlineAppView apps={loadedApps} activeAppId={inlineApp!.id} onClose={closeInlineApp} />
         )}
-        <div className={cn("flex flex-1 min-h-0", inlineApp && "hidden")}>
+        <div className={cn("relative flex flex-1 min-h-0", inlineApp && "hidden")}>
+          {/* Narrow-pane backdrop for the overlay categories sidebar */}
+          {isNarrow && narrowSidebarOpen && (
+            <div
+              className={cn(
+                "inset-0 bg-black/50 z-40",
+                isEmbedded ? "absolute" : "fixed"
+              )}
+              onClick={() => setNarrowSidebarOpen(false)}
+            />
+          )}
           {showListPanel && (
             <>
-              {/* Panel 1: Categories sidebar */}
-              {!isMobile && (
+              {/* Panel 1: Categories sidebar (in-flow on desktop, overlay on narrow) */}
+              {(!isMobile || isNarrow) && (
                 <>
                   <div
                     className={cn(
-                      "border-r border-border flex flex-col flex-shrink-0",
-                      !isSidebarResizing && "transition-[width] duration-300"
+                      "border-r border-border flex flex-col flex-shrink-0 bg-background",
+                      !isSidebarResizing && "transition-[width] duration-300",
+                      isNarrow && cn(
+                        "absolute inset-y-0 left-0 z-50 w-72 pt-[env(safe-area-inset-top)]",
+                        "transform transition-transform duration-300 ease-in-out",
+                        !narrowSidebarOpen && "-translate-x-full"
+                      )
                     )}
-                    style={{ width: `${sidebarWidth}px` }}
+                    style={isNarrow ? undefined : { width: `${sidebarWidth}px` }}
                   >
                     <ContactsSidebar
                       groups={groups}
@@ -590,22 +807,49 @@ export default function ContactsPage() {
                       onEditGroup={handleEditGroupFromSidebar}
                       onDeleteGroup={handleDeleteGroupFromSidebar}
                       onDropContacts={handleDropContacts}
+                      onDropContactsToCategory={handleDropContactsToCategory}
+                      onRenameAddressBook={client ? (book) => setRenamingAddressBook(book) : undefined}
+                      onShareAddressBook={client ? (book) => setSharingAddressBookId(book.id) : undefined}
+                      onCreateContactInBook={(book) => {
+                        setDefaultBookIdForCreate(book.id);
+                        handleCreateNew();
+                      }}
+                      onDeleteAddressBook={client ? async (book) => {
+                        const ok = await confirmDialog({
+                          title: t("address_books.delete"),
+                          message: t("address_books.confirm_delete", { name: book.name }),
+                          variant: "destructive",
+                          confirmText: t("address_books.delete"),
+                        });
+                        if (!ok) return;
+                        try {
+                          await removeAddressBook(client, book);
+                          toast.success(t("address_books.deleted"));
+                        } catch {
+                          toast.error(t("address_books.delete_failed"));
+                        }
+                      } : undefined}
+                      onRenameKeyword={(kw) => setRenamingKeyword(kw)}
+                      multiAccountMode={multiAccountEnabled && accountClients.length > 1}
                     />
                   </div>
-                  <ResizeHandle
-                    onResizeStart={() => { sidebarDragStartWidth.current = sidebarWidth; setIsSidebarResizing(true); }}
-                    onResize={(delta) => setSidebarWidth(Math.max(180, Math.min(400, sidebarDragStartWidth.current + delta)))}
-                    onResizeEnd={() => {
-                      setIsSidebarResizing(false);
-                      localStorage.setItem("contacts-sidebar-width", String(sidebarWidth));
-                    }}
-                    onDoubleClick={() => { setSidebarWidth(256); localStorage.setItem("contacts-sidebar-width", "256"); }}
-                  />
+                  {!isNarrow && (
+                    <ResizeHandle
+                      onResizeStart={() => { sidebarDragStartWidth.current = sidebarWidth; setIsSidebarResizing(true); }}
+                      onResize={(delta) => setSidebarWidth(Math.max(180, Math.min(400, sidebarDragStartWidth.current + delta)))}
+                      onResizeEnd={() => {
+                        setIsSidebarResizing(false);
+                        localStorage.setItem("contacts-sidebar-width", String(sidebarWidth));
+                      }}
+                      onDoubleClick={() => { setSidebarWidth(256); localStorage.setItem("contacts-sidebar-width", "256"); }}
+                    />
+                  )}
                 </>
               )}
 
               {/* Panel 2: Contact list */}
               <div
+                data-tour="contacts-list"
                 className={cn(
                   "border-r border-border bg-background flex flex-col flex-shrink-0",
                   isMobile ? "w-full" : "",
@@ -620,7 +864,6 @@ export default function ContactsPage() {
                   onSearchChange={setSearchQuery}
                   onSelectContact={handleSelectContact}
                   onCreateNew={handleCreateNew}
-                  categoryLabel={categoryLabel}
                   className="flex-1"
                   selectedContactIds={selectedContactIds}
                   onToggleSelection={toggleContactSelection}
@@ -630,6 +873,10 @@ export default function ContactsPage() {
                   onBulkDelete={handleBulkDelete}
                   onBulkAddToGroup={handleBulkAddToGroup}
                   onBulkExport={handleBulkExport}
+                  onEditContact={handleEditContact}
+                  onDeleteContact={handleDeleteContact}
+                  onAddContactToGroup={handleAddContactToGroup}
+                  onMenuClick={isNarrow ? () => setNarrowSidebarOpen(true) : undefined}
                 />
               </div>
 
@@ -641,7 +888,7 @@ export default function ContactsPage() {
                     setIsListResizing(false);
                     localStorage.setItem("contacts-list-width", String(listWidth));
                   }}
-                  onDoubleClick={() => { setListWidth(320); localStorage.setItem("contacts-list-width", "320"); }}
+                  onDoubleClick={() => { setListWidth(384); localStorage.setItem("contacts-list-width", "384"); }}
                 />
               )}
             </>
@@ -659,7 +906,7 @@ export default function ContactsPage() {
                     className="touch-manipulation"
                   >
                     <ArrowLeft className="w-4 h-4 mr-2" />
-                    {t("back_to_mail")}
+                    {returnToEmail ? t("back_to_email") : t("back_to_contacts")}
                   </Button>
                 </div>
               )}
@@ -670,7 +917,7 @@ export default function ContactsPage() {
           )}
         </div>
 
-        {isMobile && (
+        {isMobile && !isEmbedded && (
           <NavigationRail
             orientation="horizontal"
             onManageApps={handleManageApps}
@@ -683,6 +930,46 @@ export default function ContactsPage() {
 
       <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
       <ConfirmDialog {...confirmDialogProps} />
+      {renamingKeyword !== null && (
+        <RenameDialog
+          currentName={renamingKeyword}
+          title={t("rename_category")}
+          label={t("category_name_label")}
+          onCancel={() => setRenamingKeyword(null)}
+          onConfirm={async (newName) => {
+            try {
+              await renameKeyword(supportsSync && client ? client : null, renamingKeyword, newName);
+              toast.success(t("category_renamed"));
+              if (typeof activeCategory === "object" && "keyword" in activeCategory && activeCategory.keyword === renamingKeyword) {
+                setActiveCategory({ keyword: newName.trim() });
+              }
+              setRenamingKeyword(null);
+            } catch (err) {
+              console.error("Failed to rename category:", err);
+              toast.error(t("category_rename_failed"));
+            }
+          }}
+        />
+      )}
+      {renamingAddressBook && (
+        <RenameDialog
+          currentName={renamingAddressBook.name}
+          title={t("address_books.rename")}
+          label={t("address_books.name_label")}
+          onCancel={() => setRenamingAddressBook(null)}
+          onConfirm={async (newName) => {
+            if (!client) return;
+            try {
+              await renameAddressBook(client, renamingAddressBook, newName);
+              toast.success(t("address_books.renamed"));
+              setRenamingAddressBook(null);
+            } catch (err) {
+              console.error("Failed to rename address book:", err);
+              toast.error(t("address_books.rename_failed"));
+            }
+          }}
+        />
+      )}
       {showImportDialog && (
         <div className="fixed inset-0 bg-black/50 z-50 flex items-center justify-center p-4">
           <div className="bg-background rounded-lg border border-border shadow-xl w-full max-w-2xl max-h-[80vh] overflow-hidden">
@@ -694,6 +981,24 @@ export default function ContactsPage() {
           </div>
         </div>
       )}
+      {sharingAddressBookId && client && (() => {
+        const book = addressBooks.find((b) => b.id === sharingAddressBookId);
+        if (!book) return null;
+        return (
+          <ShareCollectionDialog
+            client={client}
+            kind="addressBook"
+            collectionName={book.name}
+            shareWith={book.shareWith}
+            ownAccountId={client.getAccountId()}
+            onShare={async (principalId, rights) => {
+              await shareAddressBook(client, book, principalId, rights as AddressBookRights | null);
+            }}
+            onClose={() => setSharingAddressBookId(null)}
+          />
+        );
+      })()}
+      </div>
     </div>
   );
 }

app/(main)/[locale]/files/page.tsx

@@ -7,26 +7,36 @@ import { ArrowLeft } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
 import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
-import { useAuthStore } from "@/stores/auth-store";
+import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
+import { useAccountStore } from "@/stores/account-store";
 import { useEmailStore } from "@/stores/email-store";
 import { useFileStore } from "@/stores/file-store";
 import { toast } from "@/stores/toast-store";
-import { cn } from "@/lib/utils";
+import { cn, formatFileSize } from "@/lib/utils";
 import { NavigationRail } from "@/components/layout/navigation-rail";
 import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
 import { InlineAppView } from "@/components/layout/inline-app-view";
 import { useSidebarApps } from "@/hooks/use-sidebar-apps";
+import { useIsEmbedded } from "@/hooks/use-is-embedded";
 import { useIsMobile } from "@/hooks/use-media-query";
+import { useRefreshGesture } from "@/hooks/use-refresh-gesture";
+import { usePolicyStore } from "@/stores/policy-store";
 import { FileBrowser } from "@/components/files/file-browser";
 import { ImagePreviewModal } from "@/components/files/image-preview-modal";
 import { FilePreviewModal } from "@/components/files/file-preview-modal";
 import { loadFilesSettings } from "@/components/files/files-settings-dialog";
 import type { FolderLayout } from "@/components/files/files-settings-dialog";
+import { AppTopBannerSlot } from "@/components/plugins/app-top-banner-slot";
+import { AlertTriangle } from "lucide-react";
 
 export default function FilesPage() {
   const router = useRouter();
   const t = useTranslations("files");
+  const filesEnabled = usePolicyStore((s) => s.isFeatureEnabled('filesEnabled'));
   const { isAuthenticated, logout, checkAuth, isLoading: authLoading, client } = useAuthStore();
+  const activeAccountId = useAuthStore((s) => s.activeAccountId);
+  const getClientForAccount = useAuthStore((s) => s.getClientForAccount);
+  const accounts = useAccountStore((s) => s.accounts);
   const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
   const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
   const { quota, isPushConnected } = useEmailStore();
@@ -45,7 +55,7 @@ export default function FilesPage() {
     navigateByPath,
     refresh,
     createDirectory,
-    uploadFile,
+    uploadFile: _uploadFile,
     uploadFiles,
     uploadFolder,
     deleteResource,
@@ -79,6 +89,7 @@ export default function FilesPage() {
   } = useFileStore();
 
   const isMobile = useIsMobile();
+  const isEmbedded = useIsEmbedded();
   const [folderLayout, setFolderLayout] = useState<FolderLayout>(() => loadFilesSettings().folderLayout);
   const hasFetched = useRef(false);
 
@@ -101,8 +112,15 @@ export default function FilesPage() {
 
   const detailResource = detailName ? resources.find(r => r.name === detailName) || null : null;
 
-  // Check auth on mount
+  // Check auth on mount – skip when already authenticated so that navigating
+  // between routes doesn't retrigger checkAuth's transient `{ client: null,
+  // isLoading: true }` reset, which was flashing the spinner on every nav.
   useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
     checkAuth().finally(() => {
       setInitialCheckDone(true);
     });
@@ -112,17 +130,31 @@ export default function FilesPage() {
   useEffect(() => {
     if (initialCheckDone && !isAuthenticated && !authLoading) {
       try { sessionStorage.setItem('redirect_after_login', window.location.pathname); } catch { /* ignore */ }
-      router.push("/login");
+      redirectToLogin();
     }
-  }, [initialCheckDone, isAuthenticated, authLoading, router]);
+  }, [initialCheckDone, isAuthenticated, authLoading]);
 
-  // Initialize JMAP files client
+  // Initialize JMAP files client. In the Pro shell, all connected accounts
+  // are surfaced as top-level folders at the root, so we *don't* auto-attach
+  // to the active account - the user picks one explicitly.
   useEffect(() => {
-    if (isAuthenticated && client && !hasFetched.current) {
-      hasFetched.current = true;
-      initClient(client);
+    if (!isAuthenticated || !client || hasFetched.current) return;
+    hasFetched.current = true;
+    if (isEmbedded) {
+      useFileStore.getState().clearClient();
+    } else {
+      initClient(client, activeAccountId);
     }
-  }, [isAuthenticated, client, initClient]);
+  }, [isAuthenticated, client, initClient, activeAccountId, isEmbedded]);
+
+  // Intercept browser refresh gestures (F5, Ctrl/Cmd+R, pull-to-refresh)
+  // and refresh files via JMAP instead of reloading the page.
+  useRefreshGesture({
+    enabled: isAuthenticated && !!client && supportsFiles === true,
+    onRefresh: async () => {
+      await refresh();
+    },
+  });
 
   // Check support and load root after client is initialized
   const storeClient = useFileStore(s => s.client);
@@ -137,6 +169,17 @@ export default function FilesPage() {
   }, [storeClient, supportsFiles, checkSupport, navigate]);
 
   const handleNavigate = useCallback((path: string, resourceId?: string | null) => {
+    // Pro shell only: the Account breadcrumb segment signals "go to this
+    // account's filesystem root" via a sentinel, distinguishing it from a
+    // Home click (which detaches the account and returns to the picker).
+    if (resourceId === '__account_root__') {
+      void navigate(null);
+      return;
+    }
+    if (isEmbedded && path === '/' && resourceId === undefined) {
+      useFileStore.getState().clearClient();
+      return;
+    }
     if (resourceId !== undefined) {
       // Direct ID-based navigation (directory click, breadcrumb dropdown folder)
       navigate(resourceId, path.split('/').pop() || '');
@@ -144,7 +187,7 @@ export default function FilesPage() {
       // Path-based navigation (breadcrumbs, favorites, recent files)
       navigateByPath(path);
     }
-  }, [navigate, navigateByPath]);
+  }, [navigate, navigateByPath, isEmbedded]);
 
   const handleCreateFolder = useCallback(async (name: string) => {
     try {
@@ -156,39 +199,43 @@ export default function FilesPage() {
     }
   }, [createDirectory, t]);
 
-  const MAX_FILE_SIZE = 500 * 1024 * 1024; // 500 MB
+  const maxSizeUpload = client?.getMaxSizeUpload() || 0;
 
   const handleUploadFiles = useCallback(async (files: File[]) => {
-    const oversized = files.filter(f => f.size > MAX_FILE_SIZE);
-    const valid = files.filter(f => f.size <= MAX_FILE_SIZE);
-    if (oversized.length > 0) {
-      toast.error(t("file_too_large", { name: oversized[0].name, max: "500 MB" }));
+    if (maxSizeUpload > 0) {
+      const oversized = files.filter(f => f.size > maxSizeUpload);
+      files = files.filter(f => f.size <= maxSizeUpload);
+      if (oversized.length > 0) {
+        toast.error(t("file_too_large", { name: oversized[0].name, max: formatFileSize(maxSizeUpload) }));
+      }
     }
-    if (valid.length === 0) return;
+    if (files.length === 0) return;
     try {
-      await uploadFiles(valid);
-      toast.success(t("upload_success", { count: valid.length }));
+      await uploadFiles(files);
+      toast.success(t("upload_success", { count: files.length }));
     } catch (err) {
       console.error("Failed to upload files:", err);
       toast.error(t("upload_error"));
     }
-  }, [uploadFiles, t]);
+  }, [uploadFiles, t, maxSizeUpload]);
 
   const handleUploadFolder = useCallback(async (files: File[]) => {
-    const oversized = files.filter(f => f.size > MAX_FILE_SIZE);
-    const valid = files.filter(f => f.size <= MAX_FILE_SIZE);
-    if (oversized.length > 0) {
-      toast.error(t("file_too_large", { name: oversized[0].name, max: "500 MB" }));
+    if (maxSizeUpload > 0) {
+      const oversized = files.filter(f => f.size > maxSizeUpload);
+      files = files.filter(f => f.size <= maxSizeUpload);
+      if (oversized.length > 0) {
+        toast.error(t("file_too_large", { name: oversized[0].name, max: formatFileSize(maxSizeUpload) }));
+      }
     }
-    if (valid.length === 0) return;
+    if (files.length === 0) return;
     try {
-      await uploadFolder(valid);
-      toast.success(t("upload_success", { count: valid.length }));
+      await uploadFolder(files);
+      toast.success(t("upload_success", { count: files.length }));
     } catch (err) {
       console.error("Failed to upload folder:", err);
       toast.error(t("upload_error"));
     }
-  }, [uploadFolder, t]);
+  }, [uploadFolder, t, maxSizeUpload]);
 
   const handleDelete = useCallback(async (name: string) => {
     const confirmed = await confirmDialog({
@@ -347,17 +394,51 @@ export default function FilesPage() {
     setShowDetails(v => !v);
   }, []);
 
+  const currentFilesAccountId = useFileStore((s) => s.currentAccountId);
+
+  // Pro shell only: all connected accounts are equal top-level entries at
+  // the root. The root path "/" itself is a cross-account picker - no
+  // account's files are shown until the user enters one.
+  const accountFolders = isEmbedded
+    ? accounts
+        .filter((a) => a.isConnected)
+        .map((a) => ({
+          accountId: a.id,
+          label: a.label || a.email,
+          email: a.email,
+          avatarColor: a.avatarColor,
+        }))
+    : [];
+  const isAccountPicker = isEmbedded && currentFilesAccountId === null;
+  const currentAccountLabel = isEmbedded && currentFilesAccountId
+    ? (accounts.find((a) => a.id === currentFilesAccountId)?.label
+        || accounts.find((a) => a.id === currentFilesAccountId)?.email
+        || null)
+    : null;
+
+  const handleSelectAccount = useCallback((accountId: string) => {
+    const nextClient = getClientForAccount(accountId);
+    if (!nextClient) return;
+    const store = useFileStore.getState();
+    store.initClient(nextClient, accountId);
+    // Reset supportsFiles so the existing checkSupport effect re-runs for
+    // the freshly-attached client and triggers the initial navigate(null).
+    useFileStore.setState({ supportsFiles: null });
+  }, [getClientForAccount]);
+
   if (!isAuthenticated) return null;
 
   return (
-    <div className="flex h-dvh bg-background overflow-hidden">
-      {!isMobile && (
+    <div className={cn("flex flex-col bg-background overflow-hidden pt-[env(safe-area-inset-top)]", isEmbedded ? "h-full" : "h-dvh")}>
+      <AppTopBannerSlot />
+      <div className="flex flex-1 min-h-0 overflow-hidden">
+      {!isMobile && !isEmbedded && (
         <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
           <NavigationRail
             collapsed
             quota={quota}
             isPushConnected={isPushConnected}
-            onLogout={() => { logout(); if (!useAuthStore.getState().isAuthenticated) router.push('/login'); }}
+            onLogout={logout}
             onManageApps={handleManageApps}
             onInlineApp={handleInlineApp}
             onCloseInlineApp={closeInlineApp}
@@ -372,7 +453,7 @@ export default function FilesPage() {
         )}
         <div className={cn("flex flex-1 min-h-0", inlineApp && "hidden")}>
           <div className="flex-1 min-w-0 flex flex-col">
-            {folderLayout !== "sidebar" && (
+            {folderLayout !== "sidebar" && !isEmbedded && (
               <div className={cn("p-4 border-b border-border", isMobile && "px-3 py-3")}>
                 <div className="flex items-center justify-between">
                   <Button
@@ -388,12 +469,25 @@ export default function FilesPage() {
               </div>
             )}
 
-            <div className="flex-1 min-h-0">
-              {supportsFiles === false ? (
+            <div className="flex-1 min-h-0 flex flex-col">
+              {!filesEnabled ? (
+                <div className="flex items-center justify-center h-full">
+                  <div className="max-w-lg text-center space-y-3 px-4">
+                    <AlertTriangle className="w-10 h-10 text-yellow-500 mx-auto" />
+                    <p className="text-sm font-medium">{t("disabled_title")}</p>
+                    <p className="text-xs text-muted-foreground">{t("disabled_description")}</p>
+                  </div>
+                </div>
+              ) : supportsFiles === false ? (
                 <div className="flex items-center justify-center h-full">
                   <p className="text-sm text-muted-foreground">{t("not_available")}</p>
                 </div>
               ) : (
+                <div className="flex flex-col flex-1 min-h-0">
+                  <div className="mx-4 mt-3 mb-1 flex items-start gap-2 rounded-md border border-yellow-500/30 bg-yellow-500/10 px-3 py-2">
+                    <AlertTriangle className="w-4 h-4 text-yellow-500 shrink-0 mt-0.5" />
+                    <p className="text-xs text-yellow-700 dark:text-yellow-400">{t("stability_warning")}</p>
+                  </div>
                 <FileBrowser
                   currentPath={currentPath}
                   resources={resources}
@@ -437,13 +531,18 @@ export default function FilesPage() {
                   showDetails={showDetails}
                   onToggleDetails={handleToggleDetails}
                   detailResource={detailResource}
+                  accountFolders={accountFolders}
+                  onSelectAccount={handleSelectAccount}
+                  accountPickerMode={isAccountPicker}
+                  accountLabel={currentAccountLabel}
                 />
+                </div>
               )}
             </div>
           </div>
         </div>
 
-        {isMobile && (
+        {isMobile && !isEmbedded && (
           <NavigationRail
             orientation="horizontal"
             onManageApps={handleManageApps}
@@ -476,6 +575,7 @@ export default function FilesPage() {
 
       <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
       <ConfirmDialog {...confirmDialogProps} />
+      </div>
     </div>
   );
 }

app/(main)/[locale]/layout.tsx

@@ -0,0 +1,52 @@
+import { notFound } from "next/navigation";
+import { IntlProvider } from "@/components/providers/intl-provider";
+import { ThemeProvider } from "@/components/providers/theme-provider";
+import { CalendarAlertProvider } from "@/components/providers/calendar-alert-provider";
+import { EmbeddedBridgeProvider } from "@/components/providers/embedded-bridge-provider";
+import { RateLimitToastProvider } from "@/components/providers/rate-limit-toast-provider";
+import { TourProvider } from "@/components/tour/tour-provider";
+import { ProtocolLaunchHandlerProvider } from "@/components/protocol/protocol-launch-handler-provider";
+import { ProInterfaceRedirect } from "@/components/pro/pro-interface-redirect";
+import { PluginDialogHost } from "@/components/plugins/plugin-dialog-host";
+import { PluginConsentDialog } from "@/components/plugins/plugin-consent-dialog";
+import { locales } from "@/i18n/routing";
+
+export default async function LocaleLayout({
+  children,
+  params,
+}: {
+  children: React.ReactNode;
+  params: Promise<{ locale: string }>;
+}) {
+  const { locale } = await params;
+
+  if (!(locales as readonly string[]).includes(locale)) notFound();
+
+  let messages;
+  try {
+    messages = (await import(`@/locales/${locale}/common.json`)).default;
+  } catch {
+    notFound();
+  }
+
+  return (
+    <IntlProvider locale={locale} messages={messages}>
+      <ThemeProvider>
+        <CalendarAlertProvider>
+          <RateLimitToastProvider>
+            <EmbeddedBridgeProvider>
+              <TourProvider>
+                <ProtocolLaunchHandlerProvider>
+                  <ProInterfaceRedirect />
+                  {children}
+                  <PluginDialogHost />
+                  <PluginConsentDialog />
+                </ProtocolLaunchHandlerProvider>
+              </TourProvider>
+            </EmbeddedBridgeProvider>
+          </RateLimitToastProvider>
+        </CalendarAlertProvider>
+      </ThemeProvider>
+    </IntlProvider>
+  );
+}

app/(main)/[locale]/login/page.tsx

@@ -7,16 +7,27 @@ import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { useAuthStore } from "@/stores/auth-store";
+import { useAccountStore } from "@/stores/account-store";
 import { useThemeStore } from "@/stores/theme-store";
 import { useShallow } from "zustand/react/shallow";
 import { useConfig } from "@/hooks/use-config";
+import { apiFetch, getPathPrefix } from "@/lib/browser-navigation";
 import { cn } from "@/lib/utils";
-import { Mail, AlertCircle, Loader2, X, Info, Eye, EyeOff, LogIn, Sun, Moon, Monitor, Check, Shield } from "lucide-react";
+import { AlertCircle, Loader2, X, Info, Eye, EyeOff, LogIn, Sun, Moon, Monitor, Check, Shield, Play, Copy } from "lucide-react";
 import { discoverOAuth, type OAuthMetadata } from "@/lib/oauth/discovery";
 import { generateCodeVerifier, generateCodeChallenge, generateState } from "@/lib/oauth/pkce";
-import { OAUTH_SCOPES } from "@/lib/oauth/tokens";
+import { useUpdateStore, selectBanner } from "@/stores/update-store";
+import type { PublicJmapServerEntry } from "@/lib/admin/jmap-servers";
 
-const APP_VERSION = "1.4.3";
+function findServerByDomain(servers: PublicJmapServerEntry[], email: string | undefined): PublicJmapServerEntry | undefined {
+  if (!email || !email.includes("@")) return undefined;
+  const domain = email.split("@")[1]?.trim().toLowerCase();
+  if (!domain) return undefined;
+  return servers.find((s) => (s.domains ?? []).some((d) => d.toLowerCase() === domain));
+}
+
+const APP_VERSION = process.env.NEXT_PUBLIC_APP_VERSION || "0.0.0";
+const GIT_COMMIT = process.env.NEXT_PUBLIC_GIT_COMMIT || "unknown";
 
 const THEME_OPTIONS = [
   { value: "light" as const, icon: Sun, label: "Light" },
@@ -24,21 +35,124 @@ const THEME_OPTIONS = [
   { value: "system" as const, icon: Monitor, label: "System" },
 ];
 
+function VersionBadge() {
+  const [copied, setCopied] = useState(false);
+  const banner = useUpdateStore(useShallow(selectBanner));
+  const startPolling = useUpdateStore((s) => s.startPolling);
+
+  useEffect(() => { startPolling(); }, [startPolling]);
+
+  const versionInfo = `Version: ${APP_VERSION}\nBuild: ${GIT_COMMIT}${banner?.latest ? `\nLatest: ${banner.latest}` : ""}`;
+
+  const handleCopy = () => {
+    navigator.clipboard.writeText(versionInfo).then(() => {
+      setCopied(true);
+      setTimeout(() => setCopied(false), 2000);
+    });
+  };
+
+  const isRed = banner?.variant === "red";
+  const triggerText = !banner
+    ? `v${APP_VERSION}`
+    : banner.severity === "security"
+      ? "Security update available"
+      : banner.severity === "deprecated"
+        ? "Version no longer supported"
+        : "New version available";
+
+  const triggerColor = !banner
+    ? "text-muted-foreground/40"
+    : isRed
+      ? "text-red-600/80 dark:text-red-400/80 hover:text-red-600 dark:hover:text-red-400"
+      : "text-amber-600/80 dark:text-amber-400/80 hover:text-amber-600 dark:hover:text-amber-400";
+
+  const triggerClass = cn(
+    "peer text-center text-xs transition-colors",
+    triggerColor,
+    banner?.url ? "cursor-pointer underline-offset-2 hover:underline" : "cursor-default",
+  );
+
+  const trigger = banner?.url ? (
+    <a href={banner.url} target="_blank" rel="noopener noreferrer" className={triggerClass}>
+      {triggerText}
+    </a>
+  ) : (
+    <p className={triggerClass}>{triggerText}</p>
+  );
+
+  return (
+    <div className="relative inline-flex justify-center">
+      {trigger}
+      <div className="absolute top-full left-1/2 -translate-x-1/2 mt-1.5 px-3 py-2 rounded-md bg-popover text-popover-foreground text-xs shadow-md border border-border opacity-0 peer-hover:opacity-100 hover:opacity-100 transition-opacity whitespace-nowrap z-10">
+        <div className="flex items-center gap-2">
+          <div className="space-y-0.5">
+            <p>Version: <span className="font-medium">{APP_VERSION}</span></p>
+            <p>Build: <span className="font-medium">{GIT_COMMIT}</span></p>
+            {banner?.latest && (
+              <p>Latest: <span className="font-medium">{banner.latest}</span></p>
+            )}
+            {banner?.advisory && (
+              <p className="text-red-500 dark:text-red-400">{banner.advisory}</p>
+            )}
+          </div>
+          <button
+            onClick={handleCopy}
+            className="p-1 rounded hover:bg-muted transition-colors"
+            aria-label="Copy version info"
+          >
+            {copied ? <Check className="w-3.5 h-3.5 text-green-500" /> : <Copy className="w-3.5 h-3.5" />}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+// Only redirect targets matching this scheme are honored by the mobile
+// handoff path. Without the check the login page becomes an open redirector
+// that funnels password and token material to any caller-supplied URL.
+const MOBILE_REDIRECT_SCHEME = "bulwarkmobile://";
+
 export default function LoginPage() {
   const router = useRouter();
   const t = useTranslations("login");
   const params = useParams();
   const searchParams = useSearchParams();
   const isAddAccountMode = searchParams.get("mode") === "add-account";
-  const { login, isLoading, error, clearError, isAuthenticated } = useAuthStore();
+
+  // When the mobile app launches the webmail in a browser tab it tacks on
+  // these params. We grab them once at mount and stash them in a ref so any
+  // login path that completes (password or OAuth) can hand control back to
+  // the app instead of routing into /mail.
+  const rawMobileRedirectUri = searchParams.get("mobile_redirect_uri") ?? "";
+  const rawMobileState = searchParams.get("mobile_state") ?? "";
+  const mobileRedirectUri = rawMobileRedirectUri.startsWith(MOBILE_REDIRECT_SCHEME)
+    ? rawMobileRedirectUri
+    : "";
+  const mobileState = mobileRedirectUri ? rawMobileState : "";
+  const isMobileHandoff = Boolean(mobileRedirectUri);
+  const { login, loginDemo, isLoading, error, clearError, isAuthenticated } = useAuthStore();
   const { theme, setTheme, initializeTheme } = useThemeStore(useShallow((s) => ({ theme: s.theme, setTheme: s.setTheme, initializeTheme: s.initializeTheme })));
-  const { appName, jmapServerUrl: serverUrl, oauthEnabled, oauthOnly, oauthClientId, oauthIssuerUrl, rememberMeEnabled, devMode, loginLogoLightUrl, loginLogoDarkUrl, loginCompanyName, loginImprintUrl, loginPrivacyPolicyUrl, loginWebsiteUrl, isLoading: configLoading, error: configError } = useConfig();
+  const { appName, jmapServerUrl: configuredServerUrl, oauthEnabled, oauthOnly, oauthClientId: globalOauthClientId, oauthIssuerUrl: globalOauthIssuerUrl, oauthScopes, rememberMeEnabled, devMode, demoMode, loginLogoLightUrl, loginLogoDarkUrl, loginCompanyName, loginImprintUrl, loginPrivacyPolicyUrl, loginWebsiteUrl, isLoading: configLoading, error: configError, autoSsoEnabled, embeddedMode: _embeddedMode, allowCustomJmapEndpoint, jmapServers, jmapServerAutoPickByDomain } = useConfig();
   const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
 
   const [formData, setFormData] = useState({
     username: "",
     password: "",
   });
+  const [jmapEndpoint, setJmapEndpoint] = useState("");
+  const [selectedServerId, setSelectedServerId] = useState<string | null>(null);
+  const [domainAutoLocked, setDomainAutoLocked] = useState(false);
+
+  const hasServerList = jmapServers.length > 0;
+  const selectedServer = hasServerList
+    ? jmapServers.find((s) => s.id === selectedServerId) ?? jmapServers[0]
+    : undefined;
+
+  // Effective values: per-server overrides win, then global config.
+  const serverUrl = selectedServer?.url || configuredServerUrl;
+  const effectiveOauthClientId = selectedServer?.oauth?.clientId || globalOauthClientId;
+  const effectiveOauthIssuerUrl = selectedServer?.oauth?.issuerUrl || globalOauthIssuerUrl;
   const [totpCode, setTotpCode] = useState("");
   const [showTotpField, setShowTotpField] = useState(false);
   const [rememberMe, setRememberMe] = useState(false);
@@ -54,6 +168,7 @@ export default function LoginPage() {
   const [oauthMetadata, setOauthMetadata] = useState<OAuthMetadata | null>(null);
   const [oauthDiscoveryDone, setOauthDiscoveryDone] = useState(false);
   const [oauthLoading, setOauthLoading] = useState(false);
+  const [demoLoading, setDemoLoading] = useState(false);
 
   const suggestionsRef = useRef<HTMLDivElement>(null);
   const inputRef = useRef<HTMLInputElement>(null);
@@ -61,6 +176,9 @@ export default function LoginPage() {
   const totpInputRef = useRef<HTMLInputElement>(null);
   const prevError = useRef<string | null>(null);
   const themeMenuRef = useRef<HTMLDivElement>(null);
+  // Captured by handleSubmit when in mobile handoff mode; consumed by the
+  // isAuthenticated effect to build the deep-link fragment.
+  const mobileHandoffPayloadRef = useRef<{ server_url: string; username: string; password: string } | null>(null);
 
   useEffect(() => {
     initializeTheme();
@@ -72,6 +190,33 @@ export default function LoginPage() {
     }
   }, [appName, serverUrl]);
 
+  useEffect(() => {
+    if (serverUrl && !jmapEndpoint) {
+      setJmapEndpoint(serverUrl);
+    }
+  }, [serverUrl, jmapEndpoint]);
+
+  // Initialize selected server when the server list arrives. Picks the first
+  // entry; the auto-pick effect below may override based on the email domain.
+  useEffect(() => {
+    if (!hasServerList) return;
+    if (selectedServerId && jmapServers.some((s) => s.id === selectedServerId)) return;
+    setSelectedServerId(jmapServers[0].id);
+  }, [hasServerList, jmapServers, selectedServerId]);
+
+  // Auto-pick by email domain. Locks the dropdown to the matched server until
+  // the user clears the email or types a domain we don't recognize.
+  useEffect(() => {
+    if (!jmapServerAutoPickByDomain || !hasServerList) return;
+    const match = findServerByDomain(jmapServers, formData.username);
+    if (match) {
+      if (selectedServerId !== match.id) setSelectedServerId(match.id);
+      setDomainAutoLocked(true);
+    } else {
+      setDomainAutoLocked(false);
+    }
+  }, [jmapServerAutoPickByDomain, hasServerList, jmapServers, formData.username, selectedServerId]);
+
   useEffect(() => {
     try {
       if (sessionStorage.getItem('session_expired') === 'true') {
@@ -90,6 +235,14 @@ export default function LoginPage() {
     prevError.current = error;
   }, [error]);
 
+  // Auto-show and focus TOTP field when server requires it
+  useEffect(() => {
+    if (error === 'totp_required') {
+      setShowTotpField(true);
+      setTimeout(() => totpInputRef.current?.focus(), 100);
+    }
+  }, [error]);
+
   useEffect(() => {
     if (!serverUrl) return;
     const saved = localStorage.getItem("webmail_usernames");
@@ -105,6 +258,19 @@ export default function LoginPage() {
 
   useEffect(() => {
     if (isAuthenticated && !isAddAccountMode) {
+      // Mobile handoff: the password path completes here once the auth store
+      // flips isAuthenticated. Hand the verified credentials back to the
+      // mobile app instead of pushing to /mail. handleSubmit captured the
+      // values needed for the fragment.
+      if (isMobileHandoff && mobileHandoffPayloadRef.current) {
+        const fragment = new URLSearchParams({
+          flow: "password",
+          ...mobileHandoffPayloadRef.current,
+          state: mobileState,
+        });
+        window.location.replace(`${mobileRedirectUri}#${fragment.toString()}`);
+        return;
+      }
       let redirectTo = '/';
       try {
         const saved = sessionStorage.getItem('redirect_after_login');
@@ -115,7 +281,7 @@ export default function LoginPage() {
       } catch { /* ignore */ }
       router.push(redirectTo);
     }
-  }, [isAuthenticated, router, isAddAccountMode]);
+  }, [isAuthenticated, router, isAddAccountMode, isMobileHandoff, mobileRedirectUri, mobileState]);
 
   useEffect(() => {
     clearError();
@@ -161,7 +327,9 @@ export default function LoginPage() {
 
   useEffect(() => {
     if (!oauthEnabled || !serverUrl) return;
-    discoverOAuth(oauthIssuerUrl || serverUrl)
+    setOauthDiscoveryDone(false);
+    setOauthMetadata(null);
+    discoverOAuth(effectiveOauthIssuerUrl || serverUrl)
       .then((metadata) => {
         setOauthMetadata(metadata);
         setOauthDiscoveryDone(true);
@@ -170,7 +338,82 @@ export default function LoginPage() {
         setOauthMetadata(null);
         setOauthDiscoveryDone(true);
       });
-  }, [oauthEnabled, serverUrl, oauthIssuerUrl]);
+  }, [oauthEnabled, serverUrl, effectiveOauthIssuerUrl]);
+
+  // Auto-SSO: when enabled with OAUTH_ONLY, skip the login page entirely
+  const ssoError = searchParams.get("sso_error");
+  const autoSsoTriggered = useRef(false);
+
+  const startServerSideSso = useCallback(async () => {
+    setOauthLoading(true);
+    try {
+      const prefix = getPathPrefix(params.locale as string);
+      const redirectUri = `${window.location.origin}${prefix}/${params.locale}/auth/callback`;
+      // In mobile-handoff mode the callback page needs to know it should
+      // redirect into the app rather than into /mail. Stash the params in
+      // sessionStorage so the same-tab callback can read them - the SSO
+      // pending cookie carries the authoritative copy server-side too.
+      if (isMobileHandoff) {
+        try {
+          sessionStorage.setItem("mobile_redirect_uri", mobileRedirectUri);
+          sessionStorage.setItem("mobile_state", mobileState);
+        } catch { /* sessionStorage unavailable */ }
+      }
+      const res = await apiFetch('/api/auth/sso/start', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        credentials: 'include',
+        body: JSON.stringify({
+          redirect_uri: redirectUri,
+          locale: params.locale,
+          server_id: selectedServer?.id,
+          ...(isMobileHandoff
+            ? { mobile_redirect_uri: mobileRedirectUri, mobile_state: mobileState }
+            : {}),
+        }),
+      });
+
+      if (!res.ok) {
+        setOauthLoading(false);
+        return;
+      }
+
+      const { authorize_url } = await res.json();
+
+      // Navigate to the authorize URL
+      const isIframe = (() => { try { return window.self !== window.top; } catch { return true; } })();
+      if (isIframe) {
+        // In an iframe, try top-level navigation
+        try {
+          window.top!.location.href = authorize_url;
+        } catch {
+          // Cross-origin restriction - fall back to current frame
+          window.location.href = authorize_url;
+        }
+      } else {
+        window.location.href = authorize_url;
+      }
+    } catch {
+      setOauthLoading(false);
+    }
+  }, [params.locale, selectedServer?.id, isMobileHandoff, mobileRedirectUri, mobileState]);
+
+  useEffect(() => {
+    if (!autoSsoEnabled || !oauthOnly || !oauthDiscoveryDone || !oauthMetadata) return;
+    if (ssoError || isAddAccountMode || isAuthenticated) return;
+    if (autoSsoTriggered.current) return;
+
+    // Guard against redirect loops
+    try {
+      if (sessionStorage.getItem("sso_attempted")) return;
+      sessionStorage.setItem("sso_attempted", "1");
+      // Clear the flag after 30 seconds so retries are possible
+      setTimeout(() => { try { sessionStorage.removeItem("sso_attempted"); } catch { /* ignore */ } }, 30000);
+    } catch { /* sessionStorage unavailable */ }
+
+    autoSsoTriggered.current = true;
+    startServerSideSso();
+  }, [autoSsoEnabled, oauthOnly, oauthDiscoveryDone, oauthMetadata, ssoError, isAddAccountMode, isAuthenticated, startServerSideSso]);
 
   const handleThemeSelect = useCallback((newTheme: "light" | "dark" | "system") => {
     setTheme(newTheme);
@@ -206,7 +449,7 @@ export default function LoginPage() {
     );
   }
 
-  if (!serverUrl) {
+  if (!serverUrl && !demoMode && !allowCustomJmapEndpoint) {
     return (
       <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-background to-muted/30">
         <div className="w-full max-w-md mx-auto px-4 text-center">
@@ -294,26 +537,56 @@ export default function LoginPage() {
   };
 
   const handleOAuthLogin = async () => {
-    if (!oauthMetadata || !oauthClientId) return;
+    if (!oauthMetadata || !effectiveOauthClientId) return;
+    // In mobile-handoff mode the client-side PKCE flow doesn't help us:
+    // tokens would land in sessionStorage on the webmail origin and the
+    // mobile app couldn't read them. Route through the server-side SSO
+    // path instead, which has the mobile-aware /api/auth/sso/complete
+    // branch.
+    if (isMobileHandoff) {
+      await startServerSideSso();
+      return;
+    }
     setOauthLoading(true);
 
     const verifier = generateCodeVerifier();
     const challenge = await generateCodeChallenge(verifier);
     const state = generateState();
-    const redirectUri = `${window.location.origin}/${params.locale}/auth/callback`;
+    const prefix = getPathPrefix(params.locale as string);
+    const redirectUri = `${window.location.origin}${prefix}/${params.locale}/auth/callback`;
+
+    // Resolve the JMAP URL to send to the callback. Server-list entries win
+    // over the custom-endpoint input, which wins over the global server URL.
+    const oauthServerUrl = selectedServer?.url
+      || (allowCustomJmapEndpoint ? jmapEndpoint : configuredServerUrl);
 
     sessionStorage.setItem("oauth_code_verifier", verifier);
     sessionStorage.setItem("oauth_state", state);
-    sessionStorage.setItem("oauth_server_url", serverUrl!);
+    sessionStorage.setItem("oauth_server_url", oauthServerUrl!);
+    if (selectedServer?.id) {
+      sessionStorage.setItem("oauth_server_id", selectedServer.id);
+    } else {
+      sessionStorage.removeItem("oauth_server_id");
+    }
     if (isAddAccountMode) {
       sessionStorage.setItem("oauth_add_account_mode", "true");
     }
 
+    // Persist the next-free cookie slot so loginWithOAuth (in stores/auth-store.ts)
+    // writes the refresh token to the correct per-account jmap_rt_<slot> cookie.
+    // loginWithOAuth reads this key but it was previously never written, so every
+    // OAuth account collapsed onto slot 0 and clobbered earlier accounts' refresh
+    // tokens. getNextCookieSlot() returns 0 when no accounts exist (correct for
+    // first sign-in) and the lowest unused slot otherwise (correct for "+ Add
+    // Account").
+    const nextSlot = useAccountStore.getState().getNextCookieSlot();
+    sessionStorage.setItem("oauth_cookie_slot", nextSlot.toString());
+
     const authUrl = new URL(oauthMetadata.authorization_endpoint);
     authUrl.searchParams.set("response_type", "code");
-    authUrl.searchParams.set("client_id", oauthClientId);
+    authUrl.searchParams.set("client_id", effectiveOauthClientId);
     authUrl.searchParams.set("redirect_uri", redirectUri);
-    authUrl.searchParams.set("scope", OAUTH_SCOPES);
+    authUrl.searchParams.set("scope", oauthScopes || "openid email profile");
     authUrl.searchParams.set("state", state);
     authUrl.searchParams.set("code_challenge", challenge);
     authUrl.searchParams.set("code_challenge_method", "S256");
@@ -324,8 +597,22 @@ export default function LoginPage() {
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
 
+    // Server-list entries always win - `allowCustomJmapEndpoint` is only honored
+    // when the admin hasn't configured a server list.
+    const effectiveServerUrl = selectedServer?.url
+      || (allowCustomJmapEndpoint ? jmapEndpoint : serverUrl);
+    // Capture before login() so the isAuthenticated effect can build the
+    // deep-link fragment with values the user actually typed (formData may
+    // be cleared by the auth store on success).
+    if (isMobileHandoff) {
+      mobileHandoffPayloadRef.current = {
+        server_url: effectiveServerUrl,
+        username: formData.username,
+        password: formData.password,
+      };
+    }
     const success = await login(
-      serverUrl,
+      effectiveServerUrl,
       formData.username,
       formData.password,
       totpCode || undefined,
@@ -334,7 +621,15 @@ export default function LoginPage() {
 
     if (success) {
       saveUsername(formData.username);
+      if (isMobileHandoff) {
+        // The isAuthenticated effect handles the redirect; nothing else to
+        // do here. Don't push to / - that would race the deep link.
+        return;
+      }
       router.push('/');
+    } else if (isMobileHandoff) {
+      // Stale payload should never feed into a later retry's redirect.
+      mobileHandoffPayloadRef.current = null;
     }
   };
 
@@ -353,9 +648,169 @@ export default function LoginPage() {
     }
   };
 
+  const handleDemoLogin = async () => {
+    setDemoLoading(true);
+    const success = await loginDemo();
+    if (success) {
+      router.push('/');
+    }
+    setDemoLoading(false);
+  };
+
   const currentThemeOption = THEME_OPTIONS.find(o => o.value === theme) || THEME_OPTIONS[2];
   const CurrentThemeIcon = currentThemeOption.icon;
 
+  // Demo-only mode: show only a large demo login button
+  if (demoMode && !isAddAccountMode) {
+    return (
+      <div className="min-h-screen flex flex-col items-center justify-center bg-gradient-to-br from-background via-muted/10 to-muted/30 relative px-4">
+        {/* Theme toggle */}
+        <div className="absolute top-5 right-5" ref={themeMenuRef} suppressHydrationWarning>
+          <button
+            type="button"
+            onClick={() => setShowThemeMenu(!showThemeMenu)}
+            className={cn(
+              "flex items-center gap-2 px-3 py-2 rounded-xl border text-sm transition-all duration-200",
+              showThemeMenu
+                ? "bg-secondary border-border text-foreground shadow-md"
+                : "bg-background/60 backdrop-blur-sm border-border/50 text-muted-foreground hover:text-foreground hover:bg-secondary/80 hover:border-border"
+            )}
+            aria-label={`Theme: ${currentThemeOption.label}`}
+            aria-expanded={showThemeMenu}
+            aria-haspopup="listbox"
+          >
+            <CurrentThemeIcon className="w-4 h-4" />
+            <span className="hidden sm:inline" suppressHydrationWarning>{currentThemeOption.label}</span>
+          </button>
+
+          {showThemeMenu && (
+            <div
+              className="absolute right-0 top-full mt-2 w-40 rounded-xl border border-border bg-background shadow-lg overflow-hidden animate-fade-in z-50"
+              role="listbox"
+              aria-label="Theme selection"
+            >
+              {THEME_OPTIONS.map((option) => {
+                const Icon = option.icon;
+                const isActive = theme === option.value;
+                return (
+                  <button
+                    key={option.value}
+                    type="button"
+                    role="option"
+                    aria-selected={isActive}
+                    onClick={() => handleThemeSelect(option.value)}
+                    className={cn(
+                      "w-full flex items-center gap-3 px-3.5 py-2.5 text-sm transition-colors",
+                      isActive
+                        ? "bg-primary/10 text-foreground font-medium"
+                        : "text-muted-foreground hover:bg-muted hover:text-foreground"
+                    )}
+                  >
+                    <Icon className="w-4 h-4" />
+                    <span className="flex-1 text-left">{option.label}</span>
+                    {isActive && <Check className="w-3.5 h-3.5 text-primary" />}
+                  </button>
+                );
+              })}
+            </div>
+          )}
+        </div>
+
+        <div className="w-full max-w-[440px] mx-auto">
+          <div className="rounded-2xl border border-border/60 bg-background/80 backdrop-blur-sm shadow-xl shadow-black/5 dark:shadow-black/20 overflow-hidden">
+            {/* Header with logo */}
+            <div className="px-8 pt-12 pb-4 text-center">
+              <div className="inline-flex items-center justify-center w-20 h-20 mb-6">
+                <img
+                  src={resolvedTheme === 'dark' ? loginLogoDarkUrl : loginLogoLightUrl}
+                  alt={appName}
+                  className="max-w-20 max-h-20 object-contain"
+                />
+              </div>
+              <h1 className="text-3xl font-bold text-foreground tracking-tight">
+                {appName}
+              </h1>
+              <p className="text-base text-muted-foreground mt-2 max-w-xs mx-auto leading-relaxed">
+                {t("demo_tagline")}
+              </p>
+            </div>
+
+            {/* Large demo button */}
+            <div className="px-8 pb-10 pt-4">
+              {error && (
+                <div className={cn(
+                  "mb-5 p-3 rounded-xl border border-destructive/20 bg-destructive/5 flex items-start gap-3",
+                  shakeError && "animate-shake"
+                )}>
+                  <div className="w-10 h-10 rounded-full bg-destructive/15 text-destructive flex items-center justify-center flex-shrink-0 shadow-sm">
+                    <AlertCircle className="w-5 h-5" />
+                  </div>
+                  <div className="flex-1 min-w-0 self-center">
+                    <p className="text-sm text-destructive leading-relaxed">
+                      {t(`error.${error}`) || t("error.generic")}
+                    </p>
+                  </div>
+                </div>
+              )}
+
+              <Button
+                type="button"
+                className="w-full h-14 font-semibold text-lg bg-primary hover:bg-primary/90 transition-all duration-200 rounded-xl shadow-lg shadow-primary/25 hover:shadow-xl hover:shadow-primary/30 hover:scale-[1.02] active:scale-[0.98]"
+                onClick={handleDemoLogin}
+                disabled={demoLoading || isLoading}
+              >
+                {demoLoading ? (
+                  <div className="flex items-center gap-3">
+                    <Loader2 className="w-5 h-5 animate-spin" />
+                    {t("demo_launching")}
+                  </div>
+                ) : (
+                  <div className="flex items-center gap-3">
+                    <Play className="w-5 h-5" />
+                    {t("demo_login_button")}
+                  </div>
+                )}
+              </Button>
+
+              <p className="text-center text-sm text-muted-foreground mt-4 leading-relaxed">
+                {t("demo_no_signup")}
+              </p>
+            </div>
+          </div>
+
+          {/* Footer */}
+          <div className="mt-6 flex flex-col items-center gap-2">
+            {loginCompanyName && (
+              <p className="text-center text-xs text-muted-foreground/60 font-medium">
+                {loginCompanyName}
+              </p>
+            )}
+            {(loginImprintUrl || loginPrivacyPolicyUrl || loginWebsiteUrl) && (
+              <div className="flex items-center gap-3 flex-wrap justify-center">
+                {loginWebsiteUrl && (
+                  <a href={loginWebsiteUrl} target="_blank" rel="noopener noreferrer" className="text-xs text-muted-foreground/50 hover:text-muted-foreground transition-colors">
+                    {t("website")}
+                  </a>
+                )}
+                {loginImprintUrl && (
+                  <a href={loginImprintUrl} target="_blank" rel="noopener noreferrer" className="text-xs text-muted-foreground/50 hover:text-muted-foreground transition-colors">
+                    {t("imprint")}
+                  </a>
+                )}
+                {loginPrivacyPolicyUrl && (
+                  <a href={loginPrivacyPolicyUrl} target="_blank" rel="noopener noreferrer" className="text-xs text-muted-foreground/50 hover:text-muted-foreground transition-colors">
+                    {t("privacy_policy")}
+                  </a>
+                )}
+              </div>
+            )}
+            <VersionBadge />
+          </div>
+        </div>
+      </div>
+    );
+  }
+
   return (
     <div className="min-h-screen flex flex-col items-center justify-center bg-gradient-to-br from-background via-muted/10 to-muted/30 relative px-4">
       {/* Theme toggle - top right, dropdown style */}
@@ -435,37 +890,45 @@ export default function LoginPage() {
             {/* Session Expired Banner */}
             {sessionExpired && (
               <div
-                className="mb-5 p-3.5 bg-blue-500/10 border border-blue-500/20 rounded-xl flex items-start gap-3"
+                className="mb-5 p-3 rounded-xl border border-info/20 bg-info/5 flex items-start gap-3"
                 role="status"
                 aria-live="polite"
               >
-                <Info className="w-4.5 h-4.5 text-blue-600 dark:text-blue-400 flex-shrink-0 mt-0.5" />
-                <p className="text-sm text-blue-700 dark:text-blue-300 flex-1 leading-relaxed">
-                  {t("session_expired")}
-                </p>
-                <button
-                  type="button"
-                  onClick={() => setSessionExpired(false)}
-                  className="p-0.5 rounded-md hover:bg-blue-500/10 transition-colors flex-shrink-0"
-                  aria-label={t("dismiss")}
-                >
-                  <X className="w-4 h-4 text-blue-600 dark:text-blue-400" />
-                </button>
+                <div className="w-10 h-10 rounded-full bg-info/15 text-info flex items-center justify-center flex-shrink-0 shadow-sm">
+                  <Info className="w-5 h-5" />
+                </div>
+                <div className="flex-1 min-w-0 self-center flex items-center gap-2">
+                  <p className="text-sm text-info flex-1 leading-relaxed">
+                    {t("session_expired")}
+                  </p>
+                  <button
+                    type="button"
+                    onClick={() => setSessionExpired(false)}
+                    className="p-1 rounded-md text-info hover:bg-info/10 transition-colors flex-shrink-0"
+                    aria-label={t("dismiss")}
+                  >
+                    <X className="w-4 h-4" />
+                  </button>
+                </div>
               </div>
             )}
 
             {/* Error Message */}
             {error && (
               <div className={cn(
-                "mb-5 p-3.5 bg-red-500/10 border border-red-500/20 rounded-xl flex items-start gap-3",
+                "mb-5 p-3 rounded-xl border border-destructive/20 bg-destructive/5 flex items-start gap-3",
                 shakeError && "animate-shake"
               )}>
-                <AlertCircle className="w-4.5 h-4.5 text-red-500 flex-shrink-0 mt-0.5" />
-                <p className="text-sm text-red-600 dark:text-red-400 leading-relaxed">
-                  {error === 'invalid_credentials' && showTotpField && totpCode
-                    ? t('error.totp_invalid')
-                    : t(`error.${error}`) || t("error.generic")}
-                </p>
+                <div className="w-10 h-10 rounded-full bg-destructive/15 text-destructive flex items-center justify-center flex-shrink-0 shadow-sm">
+                  <AlertCircle className="w-5 h-5" />
+                </div>
+                <div className="flex-1 min-w-0 self-center">
+                  <p className="text-sm text-destructive leading-relaxed">
+                    {error === 'invalid_credentials' && showTotpField && totpCode
+                      ? t('error.totp_invalid')
+                      : t(`error.${error}`) || t("error.generic")}
+                  </p>
+                </div>
               </div>
             )}
 
@@ -491,7 +954,7 @@ export default function LoginPage() {
                   )}
                 </Button>
                 <p className="text-center text-xs text-muted-foreground">
-                  Dev mode — logging in as dev@localhost
+                  Dev mode - logging in as dev@localhost
                 </p>
               </div>
             ) : oauthOnly ? (
@@ -517,11 +980,15 @@ export default function LoginPage() {
                     )}
                   </Button>
                 ) : oauthDiscoveryDone ? (
-                  <div className="p-3.5 bg-amber-500/10 border border-amber-500/20 rounded-xl flex items-start gap-2">
-                    <AlertCircle className="w-4 h-4 text-amber-700 dark:text-amber-400 flex-shrink-0 mt-0.5" />
-                    <p className="text-sm text-amber-700 dark:text-amber-400">
-                      {t("error.oauth_discovery_failed")}
-                    </p>
+                  <div className="p-3 rounded-xl border border-warning/20 bg-warning/5 flex items-start gap-3">
+                    <div className="w-10 h-10 rounded-full bg-warning/15 text-warning flex items-center justify-center flex-shrink-0 shadow-sm">
+                      <AlertCircle className="w-5 h-5" />
+                    </div>
+                    <div className="flex-1 min-w-0 self-center">
+                      <p className="text-sm text-warning leading-relaxed">
+                        {t("error.oauth_discovery_failed")}
+                      </p>
+                    </div>
                   </div>
                 ) : (
                   <div className="flex justify-center py-4">
@@ -533,6 +1000,51 @@ export default function LoginPage() {
               /* Login Form */
               <form onSubmit={handleSubmit} className="space-y-5">
                 <fieldset disabled={isLoading} className="space-y-4">
+                  {/* Server picker (when admin has configured a server list) */}
+                  {hasServerList && jmapServers.length > 1 && (
+                    <div className="space-y-1.5">
+                      <label htmlFor="jmap-server-select" className="block text-sm font-medium text-foreground">
+                        {t("jmap_server_label")}
+                      </label>
+                      <select
+                        id="jmap-server-select"
+                        value={selectedServer?.id ?? ""}
+                        onChange={(e) => setSelectedServerId(e.target.value)}
+                        disabled={domainAutoLocked}
+                        className="h-11 w-full px-3.5 bg-muted/40 border border-border/60 rounded-xl focus:bg-background focus:border-primary/50 transition-all duration-200 text-sm text-foreground disabled:opacity-70 disabled:cursor-not-allowed"
+                      >
+                        {jmapServers.map((s) => (
+                          <option key={s.id} value={s.id}>{s.label}</option>
+                        ))}
+                      </select>
+                      {domainAutoLocked && (
+                        <p className="text-[11px] text-muted-foreground leading-snug">
+                          {t("jmap_server_auto_picked")}
+                        </p>
+                      )}
+                    </div>
+                  )}
+                  {/* JMAP Endpoint field (only when no server list and custom endpoints are allowed) */}
+                  {!hasServerList && allowCustomJmapEndpoint && (
+                    <div className="space-y-1.5">
+                      <label htmlFor="jmap-endpoint" className="block text-sm font-medium text-foreground">
+                        {t("jmap_endpoint_label")}
+                      </label>
+                      <Input
+                        id="jmap-endpoint"
+                        type="url"
+                        value={jmapEndpoint}
+                        onChange={(e) => setJmapEndpoint(e.target.value)}
+                        className="h-11 px-3.5 bg-muted/40 border-border/60 rounded-xl focus:bg-background focus:border-primary/50 transition-all duration-200"
+                        placeholder={t("jmap_endpoint_placeholder")}
+                        required
+                      />
+                      <p className="text-[11px] text-muted-foreground leading-snug">
+                        {t("jmap_endpoint_cors_hint")}
+                      </p>
+                    </div>
+                  )}
+
                   {/* Username field */}
                   <div className="space-y-1.5">
                     <label htmlFor="username" className="block text-sm font-medium text-foreground">
@@ -645,7 +1157,10 @@ export default function LoginPage() {
                         maxLength={6}
                         value={totpCode}
                         onChange={(e) => setTotpCode(e.target.value.replace(/\D/g, ''))}
-                        className="h-11 px-3.5 bg-muted/40 border-border/60 rounded-xl focus:bg-background focus:border-primary/50 transition-all duration-200 text-center font-mono tracking-widest"
+                        className={cn(
+                          "h-11 px-3.5 bg-muted/40 border-border/60 rounded-xl focus:bg-background focus:border-primary/50 transition-all duration-200 text-center font-mono tracking-widest",
+                          error === 'totp_required' && "border-primary ring-2 ring-primary/30"
+                        )}
                         placeholder={t("totp_placeholder")}
                         autoComplete="one-time-code"
                         aria-label={t("totp_label")}
@@ -725,11 +1240,15 @@ export default function LoginPage() {
                 )}
 
                 {oauthEnabled && oauthDiscoveryDone && !oauthMetadata && (
-                  <div className="mt-2 p-3 bg-amber-500/10 border border-amber-500/20 rounded-xl flex items-start gap-2">
-                    <AlertCircle className="w-4 h-4 text-amber-700 dark:text-amber-400 flex-shrink-0 mt-0.5" />
-                    <p className="text-sm text-amber-700 dark:text-amber-400">
-                      {t("error.oauth_discovery_failed")}
-                    </p>
+                  <div className="mt-2 p-3 rounded-xl border border-warning/20 bg-warning/5 flex items-start gap-3">
+                    <div className="w-10 h-10 rounded-full bg-warning/15 text-warning flex items-center justify-center flex-shrink-0 shadow-sm">
+                      <AlertCircle className="w-5 h-5" />
+                    </div>
+                    <div className="flex-1 min-w-0 self-center">
+                      <p className="text-sm text-warning leading-relaxed">
+                        {t("error.oauth_discovery_failed")}
+                      </p>
+                    </div>
                   </div>
                 )}
               </form>
@@ -747,6 +1266,34 @@ export default function LoginPage() {
                 </Button>
               </div>
             )}
+
+            {/* Demo Mode Button */}
+            {demoMode && !isAddAccountMode && (
+              <div className="mt-4 pt-4 border-t border-border/40">
+                <Button
+                  type="button"
+                  variant="outline"
+                  className="w-full h-11 font-medium text-[15px] rounded-xl border-border/60 hover:bg-muted/50"
+                  onClick={handleDemoLogin}
+                  disabled={demoLoading || isLoading}
+                >
+                  {demoLoading ? (
+                    <div className="flex items-center gap-2">
+                      <Loader2 className="w-4 h-4 animate-spin" />
+                      {t("demo_launching")}
+                    </div>
+                  ) : (
+                    <div className="flex items-center gap-2">
+                      <Play className="w-4 h-4" />
+                      {t("try_demo")}
+                    </div>
+                  )}
+                </Button>
+                <p className="text-center text-xs text-muted-foreground mt-2">
+                  {t("demo_description")}
+                </p>
+              </div>
+            )}
           </div>
         </div>
 
@@ -791,9 +1338,7 @@ export default function LoginPage() {
               )}
             </div>
           )}
-          <p className="text-center text-xs text-muted-foreground/40">
-            v{APP_VERSION}
-          </p>
+          <VersionBadge />
         </div>
       </div>
     </div>

app/(main)/[locale]/pro/page.tsx

@@ -0,0 +1,402 @@
+"use client";
+
+import { useEffect, useMemo, useRef, useState, type ComponentType, type DragEvent } from "react";
+import { useTranslations } from "next-intl";
+import { NavigationRail } from "@/components/layout/navigation-rail";
+import { KeyboardShortcutsModal } from "@/components/keyboard-shortcuts-modal";
+import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
+import { InlineAppView } from "@/components/layout/inline-app-view";
+import { useSidebarApps } from "@/hooks/use-sidebar-apps";
+import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
+import { useEmailStore } from "@/stores/email-store";
+import { useSettingsStore } from "@/stores/settings-store";
+import { useDeviceDetection } from "@/hooks/use-media-query";
+import { EmbeddedContext } from "@/hooks/use-is-embedded";
+import { PaneSizeContext } from "@/hooks/use-pane-size";
+import { ProTabBar, PRO_TAB_DRAG_MIME } from "@/components/pro/pro-tab-bar";
+import { useProTabStore, type ProTab, type ProTabKind, type ProPaneId } from "@/stores/pro-tab-store";
+import { cn } from "@/lib/utils";
+
+import MailPage from "@/app/(main)/[locale]/page";
+import CalendarPage from "@/app/(main)/[locale]/calendar/page";
+import ContactsPage from "@/app/(main)/[locale]/contacts/page";
+import FilesPage from "@/app/(main)/[locale]/files/page";
+import SettingsPage from "@/app/(main)/[locale]/settings/page";
+import { ProComposeTabBody } from "@/components/pro/pro-compose-tab-body";
+import { ProEmailTabBody } from "@/components/pro/pro-email-tab-body";
+
+const APP_TAB_COMPONENTS: Partial<Record<ProTabKind, ComponentType>> = {
+  mail: MailPage,
+  calendar: CalendarPage,
+  contacts: ContactsPage,
+  files: FilesPage,
+  settings: SettingsPage,
+};
+
+type DropTarget = 'left' | 'right' | null;
+
+function renderTabBody(tab: ProTab): React.ReactNode {
+  if (tab.kind === 'compose' && tab.composeData) {
+    return <ProComposeTabBody tabId={tab.id} data={tab.composeData} />;
+  }
+  if (tab.kind === 'email' && tab.emailData) {
+    return <ProEmailTabBody tabId={tab.id} data={tab.emailData} />;
+  }
+  const Component = APP_TAB_COMPONENTS[tab.kind];
+  return Component ? <Component /> : null;
+}
+
+interface PaneProps {
+  paneId: ProPaneId;
+  tabs: ProTab[];
+  activeTabId: string | null;
+  loadedTabIds: string[];
+  onPaneFocus: (paneId: ProPaneId) => void;
+  isFocused: boolean;
+}
+
+function Pane({ paneId, tabs, activeTabId, loadedTabIds, onPaneFocus, isFocused }: PaneProps) {
+  const paneRef = useRef<HTMLDivElement | null>(null);
+  // Measured pane width, published to children via PaneSizeContext so that
+  // useDeviceDetection / useIsMobile / etc. branch on pane width - not full
+  // viewport - and inner pages collapse to their mobile/tablet layouts when
+  // the pane is narrow.
+  const [paneWidth, setPaneWidth] = useState<number | null>(null);
+
+  useEffect(() => {
+    const el = paneRef.current;
+    if (!el || typeof ResizeObserver === "undefined") return;
+    const initialRect = el.getBoundingClientRect();
+    if (initialRect.width > 0) setPaneWidth(initialRect.width);
+    const ro = new ResizeObserver((entries) => {
+      const entry = entries[0];
+      if (!entry) return;
+      const w = entry.contentRect.width;
+      setPaneWidth((prev) => (prev !== null && Math.abs(prev - w) < 0.5 ? prev : w));
+    });
+    ro.observe(el);
+    return () => ro.disconnect();
+  }, []);
+
+  return (
+    <div
+      ref={paneRef}
+      className="relative flex flex-1 flex-col overflow-hidden min-w-0 min-h-0"
+      onMouseDownCapture={() => { if (!isFocused) onPaneFocus(paneId); }}
+    >
+      <PaneSizeContext.Provider value={paneWidth}>
+        {tabs
+          .filter((tab) => loadedTabIds.includes(tab.id))
+          .map((tab) => {
+            const isActive = tab.id === activeTabId;
+            return (
+              <div
+                key={tab.id}
+                className={cn("absolute inset-0 overflow-hidden", !isActive && "hidden")}
+                aria-hidden={!isActive}
+              >
+                {renderTabBody(tab)}
+              </div>
+            );
+          })}
+      </PaneSizeContext.Provider>
+    </div>
+  );
+}
+
+export default function ProHome() {
+  const t = useTranslations();
+  const { isMobile, isTablet, isDesktop } = useDeviceDetection();
+
+  const [initialCheckDone, setInitialCheckDone] = useState(
+    () => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client
+  );
+  const [showShortcutsModal, setShowShortcutsModal] = useState(false);
+  const {
+    showAppsModal,
+    inlineApp,
+    loadedApps,
+    handleManageApps,
+    handleInlineApp,
+    closeInlineApp,
+    closeAppsModal,
+  } = useSidebarApps();
+
+  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
+  const client = useAuthStore((s) => s.client);
+  const logout = useAuthStore((s) => s.logout);
+  const checkAuth = useAuthStore((s) => s.checkAuth);
+  const authLoading = useAuthStore((s) => s.isLoading);
+  const quota = useEmailStore((s) => s.quota);
+  const isPushConnected = useEmailStore((s) => s.isPushConnected);
+  const proInterface = useSettingsStore((s) => s.proInterface);
+
+  const tabs = useProTabStore((s) => s.tabs);
+  const activeMainTabId = useProTabStore((s) => s.activeTabId);
+  const activeSplitTabId = useProTabStore((s) => s.activeSplitTabId);
+  const splitOrientation = useProTabStore((s) => s.splitOrientation);
+  const focusedPaneId = useProTabStore((s) => s.focusedPaneId);
+  const loadedTabIds = useProTabStore((s) => s.loadedTabIds);
+  const openTab = useProTabStore((s) => s.openTab);
+  const closeTab = useProTabStore((s) => s.closeTab);
+  const setActiveTab = useProTabStore((s) => s.setActiveTab);
+  const setFocusedPane = useProTabStore((s) => s.setFocusedPane);
+  const moveTabToPane = useProTabStore((s) => s.moveTabToPane);
+
+  const [isTabDragging, setIsTabDragging] = useState(false);
+  const [splitDropTarget, setSplitDropTarget] = useState<DropTarget>(null);
+  /** Whether the split pane visually renders before (true) or after (false) main. */
+  const [splitLeading, setSplitLeading] = useState(false);
+
+  // Auth bootstrap (mirrors standard page)
+  useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
+    checkAuth().finally(() => {
+      setInitialCheckDone(true);
+    });
+  }, [checkAuth]);
+
+  useEffect(() => {
+    if (initialCheckDone && !isAuthenticated && !authLoading) {
+      redirectToLogin();
+    }
+  }, [initialCheckDone, isAuthenticated, authLoading]);
+
+  useEffect(() => {
+    if (!initialCheckDone || typeof window === "undefined") return;
+    // Pro is desktop-only, and only used when the user has explicitly
+    // enabled it. If either precondition stops holding, hand the user back
+    // to the standard shell.
+    if (isMobile || isTablet || !proInterface) {
+      window.location.replace("/");
+    }
+  }, [initialCheckDone, isMobile, isTablet, proInterface]);
+
+  const mainTabs = useMemo(() => tabs.filter((t) => t.paneId === 'main'), [tabs]);
+  const splitTabs = useMemo(() => tabs.filter((t) => t.paneId === 'split'), [tabs]);
+
+  const focusedActiveTab = useMemo(() => {
+    const id = focusedPaneId === 'main' ? activeMainTabId : activeSplitTabId;
+    return tabs.find((t) => t.id === id) ?? null;
+  }, [tabs, focusedPaneId, activeMainTabId, activeSplitTabId]);
+
+  const handleRailNavigate = (itemId: 'mail' | 'calendar' | 'contacts' | 'files' | 'settings') => {
+    openTab(itemId);
+    return true;
+  };
+
+  const railActiveItemId: 'mail' | 'calendar' | 'contacts' | 'files' | 'settings' | null =
+    focusedActiveTab && (
+      focusedActiveTab.kind === 'mail' || focusedActiveTab.kind === 'calendar'
+      || focusedActiveTab.kind === 'contacts' || focusedActiveTab.kind === 'files'
+      || focusedActiveTab.kind === 'settings'
+    ) ? focusedActiveTab.kind : null;
+
+  const isSplit = splitOrientation !== null && splitTabs.length > 0;
+
+  // ---- Body-level drop targets ----
+
+  const isProTabDrag = (e: DragEvent) => e.dataTransfer.types.includes(PRO_TAB_DRAG_MIME);
+
+  const computeDropTarget = (e: DragEvent<HTMLDivElement>): DropTarget => {
+    const rect = e.currentTarget.getBoundingClientRect();
+    const xFrac = (e.clientX - rect.left) / rect.width;
+    return xFrac < 0.5 ? 'left' : 'right';
+  };
+
+  const targetPaneFromDrop = (target: DropTarget): ProPaneId | null => {
+    if (!target || !isSplit) return null;
+    const leftIsSplit = splitLeading;
+    if (target === 'left') return leftIsSplit ? 'split' : 'main';
+    return leftIsSplit ? 'main' : 'split';
+  };
+
+  const handleBodyDragOver = (e: DragEvent<HTMLDivElement>) => {
+    if (!isProTabDrag(e)) return;
+    e.preventDefault();
+    e.dataTransfer.dropEffect = "move";
+    const next = computeDropTarget(e);
+    if (next !== splitDropTarget) setSplitDropTarget(next);
+  };
+
+  const handleBodyDragLeave = (e: DragEvent<HTMLDivElement>) => {
+    const next = e.relatedTarget as Node | null;
+    if (next && e.currentTarget.contains(next)) return;
+    setSplitDropTarget(null);
+  };
+
+  const handleBodyDrop = (e: DragEvent<HTMLDivElement>) => {
+    if (!isProTabDrag(e)) return;
+    const target = computeDropTarget(e);
+    setSplitDropTarget(null);
+    setIsTabDragging(false);
+    if (!target) return;
+    e.preventDefault();
+    const draggedId = e.dataTransfer.getData(PRO_TAB_DRAG_MIME);
+    if (!draggedId) return;
+
+    if (isSplit) {
+      // Move tab to whichever pane occupies the dropped side.
+      const destPane = targetPaneFromDrop(target);
+      if (destPane) moveTabToPane(draggedId, destPane);
+      return;
+    }
+    // Create a new side-by-side split. `splitLeading` controls which side
+    // visually hosts the split pane.
+    moveTabToPane(draggedId, 'split', 'vertical');
+    setSplitLeading(target === 'left');
+  };
+
+  // Loading state (matches standard page exactly)
+  if (!initialCheckDone || authLoading || !isAuthenticated || !client) {
+    return (
+      <div className="flex h-screen items-center justify-center bg-background">
+        <div className="text-center">
+          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-foreground mx-auto"></div>
+          <p className="mt-4 text-sm text-muted-foreground">{t("common.loading")}</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (!isDesktop) return null;
+
+  // Stable keys are essential: when the split collapses, the row's child
+  // list goes from [splitPane, divider, mainPane] (or the leading variant)
+  // to [mainPane]. Without keys, React would reuse the Pane instance at
+  // index 0 - repurposing the *split* pane's instance into the main pane,
+  // which strands the main pane's ResizeObserver/paneWidth on a now-
+  // unmounted DOM node and reparents the mail tab body (causing remount
+  // + stale "still-narrow" measurements after the split is closed).
+  const mainPane = (
+    <Pane
+      key="pane-main"
+      paneId="main"
+      tabs={mainTabs}
+      activeTabId={activeMainTabId}
+      loadedTabIds={loadedTabIds}
+      onPaneFocus={setFocusedPane}
+      isFocused={focusedPaneId === 'main'}
+    />
+  );
+
+  const splitPane = isSplit ? (
+    <Pane
+      key="pane-split"
+      paneId="split"
+      tabs={splitTabs}
+      activeTabId={activeSplitTabId}
+      loadedTabIds={loadedTabIds}
+      onPaneFocus={setFocusedPane}
+      isFocused={focusedPaneId === 'split'}
+    />
+  ) : null;
+
+  const splitDivider = isSplit ? (
+    <div
+      key="pane-divider"
+      aria-hidden="true"
+      className="flex-shrink-0 w-px bg-transparent"
+      style={{ borderLeft: '1px solid rgba(128, 128, 128, 0.3)' }}
+    />
+  ) : null;
+
+  // Drop-zone overlay: a single half-body preview of where the dragged tab
+  // would land. The whole body is always a drop target (the entire surface
+  // maps to one of the four sides), so we only render the active side.
+  const dropZone = isTabDragging && splitDropTarget ? (
+    <DropZone side={splitDropTarget} />
+  ) : null;
+
+  return (
+    <EmbeddedContext.Provider value={true}>
+      <div className="flex flex-col h-dvh bg-background overflow-hidden pt-[env(safe-area-inset-top)]">
+        <div className="flex flex-1 overflow-hidden">
+          {/* Leftmost Navigation Rail - identical to the standard layout */}
+          <div
+            className="w-14 bg-secondary flex flex-col flex-shrink-0"
+            style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}
+          >
+            <NavigationRail
+              collapsed
+              quota={quota}
+              isPushConnected={isPushConnected}
+              onLogout={logout}
+              onShowShortcuts={() => setShowShortcutsModal(true)}
+              onManageApps={handleManageApps}
+              onInlineApp={handleInlineApp}
+              onCloseInlineApp={closeInlineApp}
+              activeAppId={inlineApp?.id ?? null}
+              onNavigate={handleRailNavigate}
+              activeItemId={railActiveItemId}
+            />
+          </div>
+
+          {inlineApp && (
+            <InlineAppView
+              apps={loadedApps}
+              activeAppId={inlineApp.id}
+              onClose={closeInlineApp}
+              className="flex-1"
+            />
+          )}
+
+          {!inlineApp && (
+            <div className="flex flex-1 flex-col overflow-hidden min-w-0">
+              {/* Single, unified tab bar above both panes. */}
+              <ProTabBar
+                tabs={tabs}
+                activeMainTabId={activeMainTabId}
+                activeSplitTabId={activeSplitTabId}
+                onActivate={setActiveTab}
+                onClose={closeTab}
+                onDragStateChange={setIsTabDragging}
+              />
+
+              {/* Panes container - accepts body drops for split/move. */}
+              <div
+                className="relative flex flex-row flex-1 overflow-hidden min-w-0"
+                onDragOver={handleBodyDragOver}
+                onDragLeave={handleBodyDragLeave}
+                onDrop={handleBodyDrop}
+              >
+                {isSplit
+                  ? (splitLeading
+                      ? <>{splitPane}{splitDivider}{mainPane}</>
+                      : <>{mainPane}{splitDivider}{splitPane}</>)
+                  : mainPane}
+
+                {dropZone}
+              </div>
+            </div>
+          )}
+        </div>
+
+        <KeyboardShortcutsModal
+          isOpen={showShortcutsModal}
+          onClose={() => setShowShortcutsModal(false)}
+        />
+        {showAppsModal && (
+          <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
+        )}
+      </div>
+    </EmbeddedContext.Provider>
+  );
+}
+
+function DropZone({ side }: { side: 'left' | 'right' }) {
+  return (
+    <div
+      aria-hidden="true"
+      className={cn(
+        "pointer-events-none absolute top-0 bottom-0 w-1/2 z-10",
+        "bg-primary/15 ring-2 ring-primary/40 ring-inset",
+        side === 'left' ? "left-0" : "right-0",
+      )}
+    />
+  );
+}

app/(main)/[locale]/settings/page.tsx

@@ -0,0 +1,981 @@
+"use client";
+
+import { useState, useEffect, useRef, useMemo } from 'react';
+import { useRouter } from '@/i18n/navigation';
+import { useTranslations, useMessages } from 'next-intl';
+import {
+  ArrowLeft,
+  ChevronRight,
+  LogOut,
+  Settings as SettingsIcon,
+  Palette,
+  Search,
+  User,
+  Shield,
+  UserPen,
+  PalmtreeIcon,
+  Calendar,
+  Filter,
+  FileText,
+  FolderOpen,
+  Tags,
+  HardDrive,
+  BookUser,
+  KeyRound,
+  PanelLeftClose,
+  Bell,
+  Puzzle,
+  LayoutGrid,
+  Link as LinkIcon,
+  BookOpen,
+  PenLine,
+  EyeOff,
+  Languages,
+  Info,
+  Bug,
+  X,
+  type LucideIcon,
+} from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { AppearanceSettings } from '@/components/settings/appearance-settings';
+import { AppTopBannerSlot } from '@/components/plugins/app-top-banner-slot';
+import { LayoutSettings } from '@/components/settings/layout-settings';
+import { LanguageSettings } from '@/components/settings/language-settings';
+import { ReadingSettings } from '@/components/settings/reading-settings';
+import { ComposingSettings } from '@/components/settings/composing-settings';
+import { ContentSendersSettings } from '@/components/settings/content-senders-settings';
+import { AccountSettings } from '@/components/settings/account-settings';
+import { IdentitySettings } from '@/components/settings/identity-settings';
+import { VacationSettings } from '@/components/settings/vacation-settings';
+import { CalendarSettings } from '@/components/settings/calendar-settings';
+import { CalendarManagementSettings } from '@/components/settings/calendar-management-settings';
+import { AddressBookManagementSettings } from '@/components/settings/address-book-management-settings';
+import { FilterSettings } from '@/components/settings/filter-settings';
+import { TemplateSettings } from '@/components/settings/template-settings';
+import { AboutDataSettings } from '@/components/settings/about-data-settings';
+import { DebugSettings } from '@/components/settings/debug-settings';
+import { FolderSettings } from '@/components/settings/folder-settings';
+import { KeywordSettings } from '@/components/settings/keyword-settings';
+import { AccountSecuritySettings } from '@/components/settings/account-security-settings';
+import { FilesSettingsComponent } from '@/components/settings/files-settings';
+import { ContactsSettings } from '@/components/settings/contacts-settings';
+import { SmimeSettings } from '@/components/settings/smime-settings';
+import { SidebarAppsSettings } from '@/components/settings/sidebar-apps-settings';
+import { NotificationSettings } from '@/components/settings/notification-settings';
+import { ThemesSettings } from '@/components/settings/themes-settings';
+import { PluginsSettings } from '@/components/settings/plugins-settings';
+import { ProtocolHandlerSettings } from '@/components/settings/protocol-handler-settings';
+import { useAuthStore, redirectToLogin } from '@/stores/auth-store';
+import { useEmailStore } from '@/stores/email-store';
+import { usePluginStore } from '@/stores/plugin-store';
+import { useThemeStore } from '@/stores/theme-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { useIsDesktop } from '@/hooks/use-media-query';
+import { NavigationRail } from '@/components/layout/navigation-rail';
+import { SidebarAppsModal } from '@/components/layout/sidebar-apps-modal';
+import { InlineAppView } from '@/components/layout/inline-app-view';
+import { useSidebarApps } from '@/hooks/use-sidebar-apps';
+import { useIsEmbedded } from '@/hooks/use-is-embedded';
+import { ResizeHandle } from '@/components/layout/resize-handle';
+import { useConfig } from '@/hooks/use-config';
+import { usePolicyStore } from '@/stores/policy-store';
+import { cn } from '@/lib/utils';
+
+type Tab =
+  | 'account'
+  | 'language'
+  | 'notifications'
+  | 'appearance'
+  | 'layout'
+  | 'reading'
+  | 'composing'
+  | 'identities'
+  | 'vacation'
+  | 'filters'
+  | 'templates'
+  | 'folders'
+  | 'keywords'
+  | 'security'
+  | 'encryption'
+  | 'content_senders'
+  | 'calendar'
+  | 'contacts'
+  | 'files'
+  | 'protocol_handlers'
+  | 'sidebar_apps'
+  | 'about_data'
+  | 'themes'
+  | 'plugins'
+  | 'debug';
+
+type TabGroup = 'general' | 'appearance' | 'mail' | 'privacy' | 'apps' | 'advanced';
+
+interface TabDef {
+  id: Tab;
+  label: string;
+  icon: LucideIcon;
+  group: TabGroup;
+}
+
+const tabIcons: Record<Tab, LucideIcon> = {
+  account: User,
+  language: Languages,
+  notifications: Bell,
+  appearance: Palette,
+  layout: LayoutGrid,
+  reading: BookOpen,
+  composing: PenLine,
+  identities: UserPen,
+  vacation: PalmtreeIcon,
+  filters: Filter,
+  templates: FileText,
+  folders: FolderOpen,
+  keywords: Tags,
+  security: Shield,
+  encryption: KeyRound,
+  content_senders: EyeOff,
+  calendar: Calendar,
+  contacts: BookUser,
+  files: HardDrive,
+  protocol_handlers: LinkIcon,
+  sidebar_apps: PanelLeftClose,
+  about_data: Info,
+  themes: Palette,
+  plugins: Puzzle,
+  debug: Bug,
+};
+
+const tabGroupOrder: TabGroup[] = ['general', 'appearance', 'mail', 'privacy', 'apps', 'advanced'];
+
+// Translation paths per tab. Tabs that share a namespace (email_behavior,
+// appearance) explicitly list the subkeys they actually render so sub-results
+// are attributed to the correct tab. Tabs with their own namespace just point
+// at the namespace root.
+const tabSearchPaths: Record<Tab, string[]> = {
+  account: [
+    'settings.account.name_label',
+    'settings.account.username_label',
+    'settings.account.account_type_label',
+    'settings.account.auth_method_label',
+    'settings.account.email',
+    'settings.account.server',
+    'settings.account.storage',
+    'settings.account.accounts',
+  ],
+  language: ['settings.appearance.language'],
+  notifications: ['settings.notifications'],
+  appearance: [
+    'settings.appearance.theme',
+    'settings.appearance.font_size',
+    'settings.appearance.list_density',
+    'settings.appearance.animations',
+  ],
+  layout: [
+    'settings.appearance.toolbar_position',
+    'settings.appearance.toolbar_labels',
+    'settings.appearance.hide_account_switcher',
+    'settings.appearance.show_rail_account_list',
+    'settings.appearance.unified_mailbox',
+    'settings.appearance.colorful_sidebar_icons',
+    'settings.email_behavior.mail_layout',
+  ],
+  reading: [
+    'settings.email_behavior.mark_read',
+    'settings.email_behavior.archive_mode',
+    'settings.email_behavior.delete_action',
+    'settings.email_behavior.attachment_click_action',
+    'settings.email_behavior.attachment_image_previews',
+    'settings.email_behavior.attachment_position',
+    'settings.email_behavior.disable_threading',
+    'settings.email_behavior.emails_per_page',
+    'settings.email_behavior.hide_inline_image_attachments',
+    'settings.email_behavior.hover_actions',
+    'settings.email_behavior.permanently_delete_junk',
+    'settings.email_behavior.show_preview',
+    'settings.email_behavior.plain_text_mode',
+  ],
+  composing: [
+    'settings.email_behavior.attachment_reminder',
+    'settings.email_behavior.auto_select_reply_identity',
+    'settings.email_behavior.default_mail_program',
+    'settings.email_behavior.signature_position',
+    'settings.email_behavior.sub_address_delimiter',
+  ],
+  identities: ['settings.identities'],
+  vacation: ['settings.vacation'],
+  filters: ['settings.filters'],
+  templates: ['settings.templates'],
+  folders: ['settings.folders'],
+  keywords: ['settings.keywords'],
+  security: ['settings.security'],
+  encryption: ['smime'],
+  content_senders: [
+    'settings.email_behavior.always_light_mode',
+    'settings.email_behavior.external_content',
+    'settings.email_behavior.trusted_senders',
+  ],
+  calendar: ['calendar.settings', 'calendar.management'],
+  contacts: ['settings.contacts', 'contacts'],
+  files: ['settings.files'],
+  protocol_handlers: ['protocol_handlers'],
+  sidebar_apps: ['settings.sidebar_apps', 'sidebar_apps'],
+  about_data: ['settings.advanced'],
+  themes: [],
+  plugins: [],
+  debug: ['settings.advanced'],
+};
+
+// Extra English keywords per tab so common search terms hit even when the
+// translation doesn't contain the literal word.
+const tabKeywords: Record<Tab, string> = {
+  account: 'profile email password user signin signout reorder rearrange drag dropdown switcher multi-account',
+  language: 'locale region timezone date time format',
+  notifications: 'sound alert push badge',
+  appearance: 'theme dark light font size accent color animation density',
+  layout: 'toolbar sidebar account switcher unified mailbox icons rail',
+  reading: 'mark read preview thread conversation archive delete attachment open',
+  composing: 'editor signature plain text reply forward draft compose',
+  identities: 'from address signature email',
+  vacation: 'auto reply away out of office holiday responder',
+  filters: 'sieve rules block junk forward',
+  templates: 'snippet quick reply',
+  folders: 'mailbox subscribe',
+  keywords: 'tags labels colors',
+  security: 'password 2fa two-factor passkey app password mfa',
+  encryption: 's/mime smime certificate pgp gpg',
+  content_senders: 'block sender remote images privacy tracking',
+  calendar: 'event schedule appointment meeting timezone',
+  contacts: 'address book contact',
+  files: 'attachments cloud drive storage upload',
+  protocol_handlers: 'mailto webcal links default app protocol handler',
+  sidebar_apps: 'apps webview iframe',
+  about_data: 'export import storage quota privacy backup',
+  themes: 'custom theme css skin appearance',
+  plugins: 'extensions addons',
+  debug: 'logs developer console diagnostic',
+};
+
+function flattenStrings(node: unknown, sink: string[]): void {
+  if (typeof node === 'string') {
+    sink.push(node);
+    return;
+  }
+  if (Array.isArray(node)) {
+    for (const item of node) flattenStrings(item, sink);
+    return;
+  }
+  if (node && typeof node === 'object') {
+    for (const value of Object.values(node)) flattenStrings(value, sink);
+  }
+}
+
+interface SubResult {
+  label: string;
+  description?: string;
+  // For plugin setting fields: the id of the plugin whose card needs to be
+  // expanded before the field becomes visible in the DOM.
+  pluginId?: string;
+}
+
+// Walk a translation subtree and emit sub-results for renderable settings.
+// Picks up:
+//   - bare string leaves (when a tab path points directly at a flat label)
+//   - objects with a `label` or `title` field (the standard pattern)
+//   - flat `*_label` string keys at any object level (e.g. `name_label`)
+function collectSubResults(node: unknown, sink: SubResult[]): void {
+  if (typeof node === 'string') {
+    sink.push({ label: node });
+    return;
+  }
+  if (!node || typeof node !== 'object' || Array.isArray(node)) return;
+  const obj = node as Record<string, unknown>;
+  const label = typeof obj.label === 'string' ? obj.label : (typeof obj.title === 'string' ? obj.title : undefined);
+  if (label) {
+    sink.push({
+      label,
+      description: typeof obj.description === 'string' ? obj.description : undefined,
+    });
+  }
+  for (const [key, value] of Object.entries(obj)) {
+    if (typeof value === 'string' && key !== 'label' && key !== 'title' && key.endsWith('_label')) {
+      sink.push({ label: value });
+    }
+  }
+  for (const value of Object.values(obj)) {
+    if (value && typeof value === 'object' && !Array.isArray(value)) {
+      collectSubResults(value, sink);
+    }
+  }
+}
+
+function getByPath(obj: unknown, path: string): unknown {
+  let cur: unknown = obj;
+  for (const key of path.split('.')) {
+    if (cur && typeof cur === 'object' && key in (cur as Record<string, unknown>)) {
+      cur = (cur as Record<string, unknown>)[key];
+    } else {
+      return undefined;
+    }
+  }
+  return cur;
+}
+
+// Map legacy tab IDs to current ones; runs once on read of localStorage.
+const LEGACY_TAB_MAP: Record<string, Tab> = {
+  email: 'reading',
+  advanced: 'about_data',
+};
+
+function readPersistedTab(): Tab {
+  try {
+    const saved = localStorage.getItem('settings-active-tab');
+    if (!saved) return 'appearance';
+    if (saved in LEGACY_TAB_MAP) {
+      const migrated = LEGACY_TAB_MAP[saved];
+      try { localStorage.setItem('settings-active-tab', migrated); } catch { /* ignore */ }
+      return migrated;
+    }
+    return saved as Tab;
+  } catch {
+    return 'appearance';
+  }
+}
+
+export default function SettingsPage() {
+  const router = useRouter();
+  const t = useTranslations('settings');
+  const tSidebar = useTranslations('sidebar');
+  const { client, isAuthenticated, logout, checkAuth, isLoading: authLoading } = useAuthStore();
+  const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
+  const isEmbedded = useIsEmbedded();
+  const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
+  const { quota, isPushConnected } = useEmailStore();
+  const { stalwartFeaturesEnabled } = useConfig();
+  const { isFeatureEnabled } = usePolicyStore();
+  const [activeTab, setActiveTab] = useState<Tab>(readPersistedTab);
+  const [mobileShowContent, setMobileShowContent] = useState(false);
+  const [searchQuery, setSearchQuery] = useState('');
+  const [pendingHighlight, setPendingHighlight] = useState<{ tab: Tab; label: string; pluginId?: string } | null>(null);
+  const isDesktop = useIsDesktop();
+
+  const messages = useMessages() as Record<string, unknown>;
+  const installedPlugins = usePluginStore((s) => s.plugins);
+  const installedThemes = useThemeStore((s) => s.installedThemes);
+  const sidebarAppsList = useSettingsStore((s) => s.sidebarApps);
+  const proInterface = useSettingsStore((s) => s.proInterface);
+
+  // Build a per-tab haystack for fulltext search and a list of sub-results
+  // (individual settings) per tab. Sub-results come from translation entries
+  // that have a `label`/`title` field, plus dynamic content (installed
+  // plugins/themes/sidebar apps).
+  const { tabSearchHaystacks, tabSubResults } = useMemo(() => {
+    const haystacks: Partial<Record<Tab, string>> = {};
+    const subs: Partial<Record<Tab, SubResult[]>> = {};
+    const tabIds = Object.keys(tabSearchPaths) as Tab[];
+    for (const tabId of tabIds) {
+      const strings: string[] = [tabId.replace(/_/g, ' '), tabKeywords[tabId] ?? ''];
+      const list: SubResult[] = [];
+      for (const path of tabSearchPaths[tabId]) {
+        const node = getByPath(messages, path);
+        flattenStrings(node, strings);
+        collectSubResults(node, list);
+      }
+      // Dedupe sub-results by label
+      const seen = new Set<string>();
+      subs[tabId] = list.filter((r) => {
+        if (seen.has(r.label)) return false;
+        seen.add(r.label);
+        return true;
+      });
+      haystacks[tabId] = strings.join(' ').toLowerCase();
+    }
+    if (installedPlugins.length) {
+      const haystackText = installedPlugins.map((p) => {
+        const fieldText = p.settingsSchema
+          ? Object.values(p.settingsSchema)
+              .map((s) => `${s.label} ${s.description ?? ''}`)
+              .join(' ')
+          : '';
+        return `${p.name} ${p.description} ${p.author} ${fieldText}`;
+      }).join(' ');
+      haystacks.plugins = `${haystacks.plugins ?? ''} ${haystackText}`.toLowerCase();
+      const pluginSubs: SubResult[] = installedPlugins.flatMap((p) => {
+        const items: SubResult[] = [{ label: p.name, description: p.description }];
+        if (p.settingsSchema) {
+          for (const schema of Object.values(p.settingsSchema)) {
+            items.push({
+              label: schema.label,
+              description: schema.description,
+              pluginId: p.id,
+            });
+          }
+        }
+        return items;
+      });
+      subs.plugins = [...(subs.plugins ?? []), ...pluginSubs];
+    }
+    if (installedThemes.length) {
+      const text = installedThemes.map((th) => `${th.name} ${th.description} ${th.author}`).join(' ');
+      haystacks.themes = `${haystacks.themes ?? ''} ${text}`.toLowerCase();
+      subs.themes = [
+        ...(subs.themes ?? []),
+        ...installedThemes.map((th) => ({ label: th.name, description: th.description })),
+      ];
+    }
+    if (sidebarAppsList.length) {
+      const text = sidebarAppsList.map((a) => `${a.name} ${a.url}`).join(' ');
+      haystacks.sidebar_apps = `${haystacks.sidebar_apps ?? ''} ${text}`.toLowerCase();
+      subs.sidebar_apps = [
+        ...(subs.sidebar_apps ?? []),
+        ...sidebarAppsList.map((a) => ({ label: a.name, description: a.url })),
+      ];
+    }
+    return { tabSearchHaystacks: haystacks, tabSubResults: subs };
+  }, [messages, installedPlugins, installedThemes, sidebarAppsList]);
+
+  // Sidebar resize state
+  const [settingsSidebarWidth, setSettingsSidebarWidth] = useState(() => {
+    try { const v = localStorage.getItem('settings-sidebar-width'); return v ? Number(v) : 256; } catch { return 256; }
+  });
+  const [isResizing, setIsResizing] = useState(false);
+  const dragStartWidth = useRef(256);
+
+  // Check auth on mount – skip when already authenticated so that navigating
+  // between routes doesn't retrigger checkAuth's transient `{ client: null,
+  // isLoading: true }` reset, which was flashing the spinner on every nav.
+  useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
+    checkAuth().finally(() => {
+      setInitialCheckDone(true);
+    });
+  }, [checkAuth]);
+
+  // Listen for tab change events from child components (with legacy migration)
+  useEffect(() => {
+    const handler = (e: Event) => {
+      const raw = (e as CustomEvent).detail as string;
+      if (!raw) return;
+      const tab = (LEGACY_TAB_MAP[raw] ?? raw) as Tab;
+      setActiveTab(tab);
+      try { localStorage.setItem('settings-active-tab', tab); } catch { /* ignore */ }
+    };
+    window.addEventListener('settings-tab-change', handler);
+    return () => window.removeEventListener('settings-tab-change', handler);
+  }, []);
+
+  useEffect(() => {
+    if (initialCheckDone && !isAuthenticated && !authLoading) {
+      try { sessionStorage.setItem('redirect_after_login', window.location.pathname); } catch { /* ignore */ }
+      redirectToLogin();
+    }
+  }, [initialCheckDone, isAuthenticated, authLoading]);
+
+  // Sync the mobile submenu view with browser history so the system back
+  // button (or gesture) returns to the settings list before exiting /settings.
+  useEffect(() => {
+    if (isDesktop) return;
+    if (typeof window === 'undefined') return;
+    if (!mobileShowContent) return;
+
+    window.history.pushState({ __settingsSubmenu: true }, '');
+
+    const handlePop = () => {
+      setMobileShowContent(false);
+    };
+    window.addEventListener('popstate', handlePop);
+    return () => window.removeEventListener('popstate', handlePop);
+  }, [isDesktop, mobileShowContent]);
+
+  // After clicking a search sub-result, scroll the matching setting into view
+  // and add a temporary highlight class. Some tabs fetch data and render
+  // their SettingItems only after a loading state, so retry until the element
+  // shows up (or we give up after ~2s).
+  useEffect(() => {
+    if (!pendingHighlight) return;
+    if (pendingHighlight.tab !== activeTab) return;
+    if (typeof window === 'undefined') return;
+
+    // For plugin-setting sub-results, ask the plugins tab to expand the
+    // matching card so the field becomes part of the DOM. Dispatched here
+    // (not in the click handler) because PluginsSettings only mounts after
+    // the tab switches, and its listener registers in its own useEffect -
+    // child effects run before parent effects, so by the time we get here
+    // the listener is guaranteed to be in place.
+    if (pendingHighlight.pluginId) {
+      window.dispatchEvent(
+        new CustomEvent('settings-plugin-expand', { detail: { pluginId: pendingHighlight.pluginId } })
+      );
+    }
+
+    let cancelled = false;
+    let retryTimer: ReturnType<typeof setTimeout> | undefined;
+    let cleanupTimer: ReturnType<typeof setTimeout> | undefined;
+    let highlightedEl: HTMLElement | null = null;
+
+    const escaped = pendingHighlight.label.replace(/"/g, '\\"');
+    const selector = `[data-search-label="${escaped}"]`;
+    const deadline = Date.now() + 2000;
+
+    const tryHighlight = () => {
+      if (cancelled) return;
+      const el = document.querySelector<HTMLElement>(selector);
+      if (!el) {
+        if (Date.now() < deadline) {
+          retryTimer = setTimeout(tryHighlight, 80);
+        }
+        return;
+      }
+      el.scrollIntoView({ behavior: 'smooth', block: 'center' });
+      // Remove + reflow + add restarts the CSS animation if the class was
+      // already present (re-clicking the same sub-result).
+      el.classList.remove('settings-search-highlight');
+      void el.offsetWidth;
+      el.classList.add('settings-search-highlight');
+      highlightedEl = el;
+      cleanupTimer = setTimeout(() => {
+        el.classList.remove('settings-search-highlight');
+        highlightedEl = null;
+      }, 1800);
+    };
+
+    // First attempt next frame so the freshly-mounted tab content is in DOM.
+    const raf = window.requestAnimationFrame(tryHighlight);
+
+    // Do NOT reset pendingHighlight here - that would retrigger this effect
+    // and the cleanup below would strip the class right after we added it.
+    return () => {
+      cancelled = true;
+      window.cancelAnimationFrame(raf);
+      if (retryTimer) clearTimeout(retryTimer);
+      if (cleanupTimer) clearTimeout(cleanupTimer);
+      if (highlightedEl) highlightedEl.classList.remove('settings-search-highlight');
+    };
+  }, [pendingHighlight, activeTab]);
+
+  if (!isAuthenticated) {
+    return null;
+  }
+
+  const supportsVacation = client?.supportsVacationResponse() ?? false;
+  const supportsCalendar = client?.supportsCalendars() ?? false;
+  const supportsSieve = client?.supportsSieve() ?? false;
+  const supportsFiles = client?.supportsFiles() ?? false;
+
+  const tabs: TabDef[] = [
+    // General
+    { id: 'account', label: t('tabs.account'), icon: tabIcons.account, group: 'general' },
+    { id: 'language', label: t('tabs.language'), icon: tabIcons.language, group: 'general' },
+    { id: 'notifications', label: t('tabs.notifications'), icon: tabIcons.notifications, group: 'general' },
+    { id: 'protocol_handlers', label: t('tabs.protocol_handlers'), icon: tabIcons.protocol_handlers, group: 'general' },
+
+    // Appearance
+    { id: 'appearance', label: t('tabs.appearance'), icon: tabIcons.appearance, group: 'appearance' },
+    { id: 'layout', label: t('tabs.layout'), icon: tabIcons.layout, group: 'appearance' },
+
+    // Mail
+    { id: 'reading', label: t('tabs.reading'), icon: tabIcons.reading, group: 'mail' },
+    { id: 'composing', label: t('tabs.composing'), icon: tabIcons.composing, group: 'mail' },
+    { id: 'identities', label: t('tabs.identities'), icon: tabIcons.identities, group: 'mail' },
+    ...(supportsVacation ? [{ id: 'vacation' as Tab, label: t('tabs.vacation'), icon: tabIcons.vacation, group: 'mail' as TabGroup }] : []),
+    ...(supportsSieve ? [{ id: 'filters' as Tab, label: t('tabs.filters'), icon: tabIcons.filters, group: 'mail' as TabGroup }] : []),
+    ...(isFeatureEnabled('templatesEnabled') ? [{ id: 'templates' as Tab, label: t('tabs.templates'), icon: tabIcons.templates, group: 'mail' as TabGroup }] : []),
+    { id: 'folders', label: t('tabs.folders'), icon: tabIcons.folders, group: 'mail' },
+    ...(isFeatureEnabled('customKeywordsEnabled') ? [{ id: 'keywords' as Tab, label: t('tabs.keywords'), icon: tabIcons.keywords, group: 'mail' as TabGroup }] : []),
+
+    // Privacy & Security
+    ...(stalwartFeaturesEnabled ? [{ id: 'security' as Tab, label: t('tabs.security'), icon: tabIcons.security, group: 'privacy' as TabGroup }] : []),
+    ...(isFeatureEnabled('smimeEnabled') ? [{ id: 'encryption' as Tab, label: t('tabs.encryption'), icon: tabIcons.encryption, group: 'privacy' as TabGroup }] : []),
+    { id: 'content_senders', label: t('tabs.content_senders'), icon: tabIcons.content_senders, group: 'privacy' },
+
+    // Apps
+    ...(supportsCalendar ? [{ id: 'calendar' as Tab, label: t('tabs.calendar'), icon: tabIcons.calendar, group: 'apps' as TabGroup }] : []),
+    ...(isFeatureEnabled('contactsEnabled') ? [{ id: 'contacts' as Tab, label: t('tabs.contacts'), icon: tabIcons.contacts, group: 'apps' as TabGroup }] : []),
+    ...(supportsFiles && isFeatureEnabled('filesEnabled') ? [{ id: 'files' as Tab, label: t('tabs.files'), icon: tabIcons.files, group: 'apps' as TabGroup }] : []),
+    ...(isFeatureEnabled('sidebarAppsEnabled') ? [{ id: 'sidebar_apps' as Tab, label: t('tabs.sidebar_apps'), icon: tabIcons.sidebar_apps, group: 'apps' as TabGroup }] : []),
+
+    // Advanced
+    { id: 'about_data', label: t('tabs.about_data'), icon: tabIcons.about_data, group: 'advanced' },
+    ...(isFeatureEnabled('themesEnabled') ? [{ id: 'themes' as Tab, label: 'Themes', icon: tabIcons.themes, group: 'advanced' as TabGroup }] : []),
+    ...(isFeatureEnabled('pluginsEnabled') ? [{ id: 'plugins' as Tab, label: 'Plugins', icon: tabIcons.plugins, group: 'advanced' as TabGroup }] : []),
+    ...(isFeatureEnabled('debugModeEnabled') ? [{ id: 'debug' as Tab, label: t('tabs.debug'), icon: tabIcons.debug, group: 'advanced' as TabGroup }] : []),
+  ];
+
+  // Group tabs by category
+  const groupedTabs = tabGroupOrder
+    .map((group) => ({
+      group,
+      label: t(`tab_groups.${group}`),
+      items: tabs.filter((tab) => tab.group === group),
+    }))
+    .filter((g) => g.items.length > 0);
+
+  const trimmedQuery = searchQuery.trim().toLowerCase();
+  const matchesQuery = (tab: TabDef) => {
+    if (!trimmedQuery) return true;
+    if (tab.label.toLowerCase().includes(trimmedQuery)) return true;
+    return tabSearchHaystacks[tab.id]?.includes(trimmedQuery) ?? false;
+  };
+
+  const subResultsForTab = (tabId: Tab): SubResult[] => {
+    if (!trimmedQuery) return [];
+    const list = tabSubResults[tabId] ?? [];
+    return list
+      .filter((r) =>
+        r.label.toLowerCase().includes(trimmedQuery) ||
+        (r.description?.toLowerCase().includes(trimmedQuery) ?? false)
+      )
+      .slice(0, 6);
+  };
+
+  const filteredGroupedTabs = trimmedQuery
+    ? groupedTabs
+        .map((g) => ({ ...g, items: g.items.filter(matchesQuery) }))
+        .filter((g) => g.items.length > 0)
+    : groupedTabs;
+
+  // If active tab is not in the visible list (e.g., feature disabled), fall back.
+  const isActiveVisible = tabs.some((tab) => tab.id === activeTab);
+  const effectiveActiveTab: Tab = isActiveVisible ? activeTab : 'appearance';
+
+  const handleTabSelect = (tabId: Tab) => {
+    setActiveTab(tabId);
+    try { localStorage.setItem('settings-active-tab', tabId); } catch { /* ignore */ }
+    if (!isDesktop) {
+      setMobileShowContent(true);
+    }
+  };
+
+  const handleSubResultSelect = (tabId: Tab, sub: SubResult) => {
+    handleTabSelect(tabId);
+    setPendingHighlight({ tab: tabId, label: sub.label, pluginId: sub.pluginId });
+  };
+
+  const activeTabLabel = tabs.find((tab) => tab.id === effectiveActiveTab)?.label ?? '';
+
+  const renderTabContent = () => (
+    <>
+      {effectiveActiveTab === 'account' && <AccountSettings />}
+      {effectiveActiveTab === 'language' && <LanguageSettings />}
+      {effectiveActiveTab === 'notifications' && <NotificationSettings />}
+      {effectiveActiveTab === 'appearance' && <AppearanceSettings />}
+      {effectiveActiveTab === 'layout' && <LayoutSettings />}
+      {effectiveActiveTab === 'reading' && <ReadingSettings />}
+      {effectiveActiveTab === 'composing' && <ComposingSettings />}
+      {effectiveActiveTab === 'identities' && <IdentitySettings />}
+      {effectiveActiveTab === 'vacation' && <VacationSettings />}
+      {effectiveActiveTab === 'filters' && <FilterSettings />}
+      {effectiveActiveTab === 'templates' && <TemplateSettings />}
+      {effectiveActiveTab === 'folders' && <FolderSettings />}
+      {effectiveActiveTab === 'keywords' && <KeywordSettings />}
+      {effectiveActiveTab === 'security' && <AccountSecuritySettings />}
+      {effectiveActiveTab === 'encryption' && <SmimeSettings />}
+      {effectiveActiveTab === 'content_senders' && <ContentSendersSettings />}
+      {effectiveActiveTab === 'calendar' && <><CalendarSettings /><div className="mt-8"><CalendarManagementSettings /></div></>}
+      {effectiveActiveTab === 'contacts' && <><ContactsSettings /><div className="mt-8"><AddressBookManagementSettings /></div></>}
+      {effectiveActiveTab === 'files' && <FilesSettingsComponent />}
+      {effectiveActiveTab === 'protocol_handlers' && <ProtocolHandlerSettings supportsCalendar={supportsCalendar} />}
+      {effectiveActiveTab === 'sidebar_apps' && <SidebarAppsSettings />}
+      {effectiveActiveTab === 'about_data' && <AboutDataSettings />}
+      {effectiveActiveTab === 'themes' && <ThemesSettings />}
+      {effectiveActiveTab === 'plugins' && <PluginsSettings />}
+      {effectiveActiveTab === 'debug' && <DebugSettings />}
+    </>
+  );
+
+  // Mobile layout
+  if (!isDesktop) {
+    if (mobileShowContent) {
+      return (
+        <div className={cn("flex flex-col bg-background pt-[env(safe-area-inset-top)]", isEmbedded ? "h-full" : "h-dvh")}>
+          <AppTopBannerSlot />
+          <div className="flex items-center gap-2 px-4 h-14 border-b border-border bg-background shrink-0">
+            <Button
+              variant="ghost"
+              size="icon"
+              onClick={() => window.history.back()}
+              className="h-10 w-10"
+            >
+              <ArrowLeft className="w-5 h-5" />
+            </Button>
+            <h1 className="font-semibold text-lg truncate">{activeTabLabel}</h1>
+          </div>
+
+          <div className="flex-1 overflow-y-auto p-4">
+            {renderTabContent()}
+          </div>
+
+          {!isEmbedded && (
+            <NavigationRail
+              orientation="horizontal"
+              onManageApps={handleManageApps}
+              onInlineApp={handleInlineApp}
+              onCloseInlineApp={closeInlineApp}
+              activeAppId={inlineApp?.id ?? null}
+            />
+          )}
+          <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
+        </div>
+      );
+    }
+
+    return (
+      <div className={cn("flex flex-col bg-background pt-[env(safe-area-inset-top)]", isEmbedded ? "h-full" : "h-dvh")}>
+        <AppTopBannerSlot />
+        <div className="flex items-center gap-2 px-4 h-14 border-b border-border bg-background shrink-0">
+          <Button
+            variant="ghost"
+            size="icon"
+            onClick={() => router.push('/')}
+            className="h-10 w-10"
+          >
+            <ArrowLeft className="w-5 h-5" />
+          </Button>
+          <div className="flex items-center gap-2">
+            <SettingsIcon className="w-5 h-5 text-muted-foreground" />
+            <h1 className="font-semibold text-lg">{t('title')}</h1>
+          </div>
+        </div>
+
+        <div className="flex-1 overflow-y-auto">
+          <div className="px-4 pt-3 pb-1">
+            <div className="relative">
+              <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground pointer-events-none" />
+              <Input
+                type="search"
+                value={searchQuery}
+                onChange={(e) => setSearchQuery(e.target.value)}
+                placeholder={t('search_placeholder')}
+                className="pl-9 pr-9 h-10"
+                aria-label={t('search_placeholder')}
+              />
+              {searchQuery && (
+                <button
+                  type="button"
+                  onClick={() => setSearchQuery('')}
+                  className="absolute right-2 top-1/2 -translate-y-1/2 p-1 rounded-md text-muted-foreground hover:bg-muted"
+                  aria-label={t('search_clear')}
+                >
+                  <X className="w-4 h-4" />
+                </button>
+              )}
+            </div>
+          </div>
+          <div className="py-2">
+            {filteredGroupedTabs.length === 0 && (
+              <div className="px-5 py-6 text-sm text-muted-foreground text-center">
+                {t('search_no_results')}
+              </div>
+            )}
+            {filteredGroupedTabs.map((group, groupIndex) => (
+              <div key={group.group}>
+                {groupIndex > 0 && <div className="mx-5 my-2 border-t border-border" />}
+                <div className="px-5 pt-3 pb-1.5">
+                  <span className="text-xs font-semibold uppercase tracking-wider text-muted-foreground">
+                    {group.label}
+                  </span>
+                </div>
+                {group.items.map((tab) => {
+                  const Icon = tab.icon;
+                  const subs = subResultsForTab(tab.id);
+                  return (
+                    <div key={tab.id}>
+                      <button
+                        onClick={() => handleTabSelect(tab.id)}
+                        className="w-full flex items-center justify-between px-5 py-3.5 text-sm text-foreground hover:bg-muted transition-colors duration-150"
+                      >
+                        <span className="flex items-center gap-3">
+                          <Icon className="w-4 h-4 text-muted-foreground" />
+                          {tab.label}
+                        </span>
+                        <ChevronRight className="w-4 h-4 text-muted-foreground" />
+                      </button>
+                      {subs.map((sub) => (
+                        <button
+                          key={`${tab.id}:${sub.label}`}
+                          onClick={() => handleSubResultSelect(tab.id, sub)}
+                          className="w-full flex items-center pl-12 pr-5 py-2 text-xs text-muted-foreground hover:bg-muted hover:text-foreground transition-colors duration-150 text-left"
+                        >
+                          <span className="truncate">{sub.label}</span>
+                        </button>
+                      ))}
+                    </div>
+                  );
+                })}
+              </div>
+            ))}
+          </div>
+
+          <div className="border-t border-border px-5 py-3">
+            <button
+              onClick={logout}
+              className="w-full flex items-center gap-3 py-2.5 text-sm text-destructive hover:bg-muted rounded-md px-2 transition-colors duration-150"
+            >
+              <LogOut className="w-4 h-4" />
+              <span>{tSidebar('sign_out')}</span>
+            </button>
+          </div>
+        </div>
+
+        {!isEmbedded && (
+          <NavigationRail
+            orientation="horizontal"
+            onManageApps={handleManageApps}
+            onInlineApp={handleInlineApp}
+            onCloseInlineApp={closeInlineApp}
+            activeAppId={inlineApp?.id ?? null}
+          />
+        )}
+        <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
+      </div>
+    );
+  }
+
+  // Desktop layout
+  return (
+    <div className={cn("flex flex-col bg-background pt-[env(safe-area-inset-top)]", isEmbedded ? "h-full" : "h-dvh")}>
+      <AppTopBannerSlot />
+      <div className="flex flex-1 min-h-0">
+      {!isEmbedded && (
+        <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
+          <NavigationRail
+            collapsed
+            quota={quota}
+            isPushConnected={isPushConnected}
+            onLogout={logout}
+            onManageApps={handleManageApps}
+            onInlineApp={handleInlineApp}
+            onCloseInlineApp={closeInlineApp}
+            activeAppId={inlineApp?.id ?? null}
+          />
+        </div>
+      )}
+
+      {inlineApp && (
+        <InlineAppView apps={loadedApps} activeAppId={inlineApp!.id} onClose={closeInlineApp} className="flex-1" />
+      )}
+      {!inlineApp && (
+      <>
+      <div
+        className={cn(
+          "border-r border-border bg-secondary flex flex-col",
+          !isResizing && "transition-[width] duration-300"
+        )}
+        style={{ width: `${settingsSidebarWidth}px` }}
+      >
+        {!proInterface && (
+          <div className="p-4 border-b border-border">
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={() => router.push('/')}
+              className="w-full justify-start"
+            >
+              <ArrowLeft className="w-4 h-4 mr-2" />
+              {t('back_to_mail')}
+            </Button>
+          </div>
+        )}
+
+        <div className="flex-1 overflow-y-auto py-2" data-tour="settings-tabs">
+          <div className="px-3 pt-1 pb-1">
+            <div className="relative">
+              <Search className="absolute left-2.5 top-1/2 -translate-y-1/2 w-3.5 h-3.5 text-muted-foreground pointer-events-none" />
+              <Input
+                type="search"
+                value={searchQuery}
+                onChange={(e) => setSearchQuery(e.target.value)}
+                placeholder={t('search_placeholder')}
+                className="pl-8 pr-8 h-9 text-sm"
+                aria-label={t('search_placeholder')}
+              />
+              {searchQuery && (
+                <button
+                  type="button"
+                  onClick={() => setSearchQuery('')}
+                  className="absolute right-1.5 top-1/2 -translate-y-1/2 p-0.5 rounded-md text-muted-foreground hover:bg-muted"
+                  aria-label={t('search_clear')}
+                >
+                  <X className="w-3.5 h-3.5" />
+                </button>
+              )}
+            </div>
+          </div>
+          <div className="px-2 space-y-0.5">
+            {filteredGroupedTabs.length === 0 && (
+              <div className="px-3 py-6 text-sm text-muted-foreground text-center">
+                {t('search_no_results')}
+              </div>
+            )}
+            {filteredGroupedTabs.map((group, groupIndex) => (
+              <div key={group.group}>
+                {groupIndex > 0 && <div className="mx-1 my-2 border-t border-border" />}
+                <div className="px-3 pt-2.5 pb-1">
+                  <span className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
+                    {group.label}
+                  </span>
+                </div>
+                {group.items.map((tab) => {
+                  const Icon = tab.icon;
+                  const subs = subResultsForTab(tab.id);
+                  return (
+                    <div key={tab.id}>
+                      <button
+                        onClick={() => setActiveTab(tab.id)}
+                        className={cn(
+                          'w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
+                          effectiveActiveTab === tab.id
+                            ? 'bg-accent text-accent-foreground font-medium'
+                            : 'hover:bg-muted text-foreground'
+                        )}
+                      >
+                        <Icon className={cn(
+                          'w-4 h-4 shrink-0',
+                          effectiveActiveTab === tab.id ? 'text-accent-foreground' : 'text-muted-foreground'
+                        )} />
+                        {tab.label}
+                      </button>
+                      {subs.map((sub) => (
+                        <button
+                          key={`${tab.id}:${sub.label}`}
+                          onClick={() => handleSubResultSelect(tab.id, sub)}
+                          className="w-full text-left pl-9 pr-3 py-1.5 rounded-md text-xs text-muted-foreground hover:bg-muted hover:text-foreground transition-colors duration-150"
+                        >
+                          <span className="truncate block">{sub.label}</span>
+                        </button>
+                      ))}
+                    </div>
+                  );
+                })}
+              </div>
+            ))}
+          </div>
+        </div>
+      </div>
+
+      <ResizeHandle
+        onResizeStart={() => { dragStartWidth.current = settingsSidebarWidth; setIsResizing(true); }}
+        onResize={(delta) => setSettingsSidebarWidth(Math.max(180, Math.min(400, dragStartWidth.current + delta)))}
+        onResizeEnd={() => {
+          setIsResizing(false);
+          localStorage.setItem('settings-sidebar-width', String(settingsSidebarWidth));
+        }}
+        onDoubleClick={() => { setSettingsSidebarWidth(256); localStorage.setItem('settings-sidebar-width', '256'); }}
+      />
+
+      <div className="flex-1 overflow-y-auto">
+        <div className="max-w-3xl mx-auto px-6 py-6">
+          {renderTabContent()}
+        </div>
+      </div>
+      </>
+      )}
+      <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
+      </div>
+    </div>
+  );
+}

app/(main)/admin/_tabs/_jmap-servers-section.tsx

@@ -0,0 +1,272 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { Plus, Trash2, RotateCcw, ChevronDown, ChevronRight } from 'lucide-react';
+import type { JmapServerEntry } from '@/lib/admin/jmap-servers';
+
+interface Props {
+  value: JmapServerEntry[];
+  source?: string;
+  onChange: (next: JmapServerEntry[]) => void;
+  onRevert: () => void;
+}
+
+interface RowDraft {
+  id: string;
+  label: string;
+  url: string;
+  domains: string;
+  oauthClientId: string;
+  oauthIssuerUrl: string;
+  oauthClientSecret: string;
+  oauthExpanded: boolean;
+}
+
+function entryToDraft(e: JmapServerEntry): RowDraft {
+  return {
+    id: e.id,
+    label: e.label,
+    url: e.url,
+    domains: (e.domains ?? []).join(', '),
+    oauthClientId: e.oauth?.clientId ?? '',
+    oauthIssuerUrl: e.oauth?.issuerUrl ?? '',
+    oauthClientSecret: e.oauth?.clientSecret ?? '',
+    oauthExpanded: !!(e.oauth && (e.oauth.clientId || e.oauth.issuerUrl || e.oauth.clientSecret)),
+  };
+}
+
+function draftToEntry(d: RowDraft): JmapServerEntry | null {
+  const id = d.id.trim();
+  const url = d.url.trim().replace(/\/+$/, '');
+  if (!id || !url) return null;
+  const domains = d.domains
+    .split(/[,\s]+/)
+    .map((s) => s.trim().toLowerCase())
+    .filter(Boolean);
+  const clientId = d.oauthClientId.trim();
+  const issuerUrl = d.oauthIssuerUrl.trim().replace(/\/+$/, '');
+  const clientSecret = d.oauthClientSecret;
+  const oauth = clientId || issuerUrl || clientSecret
+    ? {
+        ...(clientId ? { clientId } : {}),
+        ...(issuerUrl ? { issuerUrl } : {}),
+        ...(clientSecret ? { clientSecret } : {}),
+      }
+    : undefined;
+  return {
+    id,
+    label: d.label.trim() || id,
+    url,
+    ...(domains.length > 0 ? { domains } : {}),
+    ...(oauth ? { oauth } : {}),
+  };
+}
+
+function emptyDraft(): RowDraft {
+  return {
+    id: '',
+    label: '',
+    url: '',
+    domains: '',
+    oauthClientId: '',
+    oauthIssuerUrl: '',
+    oauthClientSecret: '',
+    oauthExpanded: false,
+  };
+}
+
+export function JmapServersSection({ value, source, onChange, onRevert }: Props) {
+  const [drafts, setDrafts] = useState<RowDraft[]>(() => value.map(entryToDraft));
+
+  useEffect(() => {
+    // Re-sync from props when the underlying config value changes (e.g. revert,
+    // initial load). Skip when drafts already represent the same array to avoid
+    // clobbering in-progress edits.
+    setDrafts((prev) => {
+      if (prev.length === value.length) {
+        const same = prev.every((d, i) => {
+          const e = value[i];
+          return d.id === e.id && d.url === e.url && d.label === e.label;
+        });
+        if (same) return prev;
+      }
+      return value.map(entryToDraft);
+    });
+  }, [value]);
+
+  function commit(next: RowDraft[]) {
+    setDrafts(next);
+    const entries: JmapServerEntry[] = [];
+    for (const d of next) {
+      const e = draftToEntry(d);
+      if (e) entries.push(e);
+    }
+    onChange(entries);
+  }
+
+  function update(idx: number, patch: Partial<RowDraft>) {
+    commit(drafts.map((d, i) => (i === idx ? { ...d, ...patch } : d)));
+  }
+
+  function remove(idx: number) {
+    commit(drafts.filter((_, i) => i !== idx));
+  }
+
+  function add() {
+    setDrafts((prev) => [...prev, emptyDraft()]);
+    // Don't commit yet - new row needs id+url before it counts.
+  }
+
+  const ids = new Set<string>();
+  const duplicateIdx = new Set<number>();
+  drafts.forEach((d, i) => {
+    const id = d.id.trim();
+    if (!id) return;
+    if (ids.has(id)) duplicateIdx.add(i);
+    ids.add(id);
+  });
+
+  return (
+    <div className="px-4 py-3 space-y-3">
+      <div className="flex items-center justify-between gap-2">
+        <div className="min-w-0">
+          <div className="flex items-center gap-2">
+            <span className="text-sm font-medium text-foreground">Servers</span>
+            {source && source !== 'default' && (
+              <span className={`text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded ${source === 'admin' ? 'bg-primary/10 text-primary' : 'bg-muted text-muted-foreground'}`}>
+                {source}
+              </span>
+            )}
+          </div>
+          <p className="text-xs text-muted-foreground mt-0.5">
+            Each entry appears as an option on the login dropdown. Leave the list empty to fall back to the single <code className="text-[11px]">JMAP Server URL</code> above.
+          </p>
+        </div>
+        <div className="flex items-center gap-2 shrink-0">
+          {source === 'admin' && (
+            <button
+              onClick={onRevert}
+              className="text-muted-foreground hover:text-foreground"
+              title="Revert to default"
+            >
+              <RotateCcw className="w-3.5 h-3.5" />
+            </button>
+          )}
+          <button
+            onClick={add}
+            className="inline-flex items-center gap-1.5 h-8 px-2.5 rounded-md border border-input bg-background text-xs text-foreground hover:bg-muted transition-colors"
+          >
+            <Plus className="w-3.5 h-3.5" />
+            Add server
+          </button>
+        </div>
+      </div>
+
+      {drafts.length === 0 && (
+        <div className="text-xs text-muted-foreground italic">No servers configured.</div>
+      )}
+
+      {drafts.map((d, i) => {
+        const isDuplicate = duplicateIdx.has(i);
+        return (
+          <div key={i} className="rounded-md border border-border bg-muted/20 p-3 space-y-2">
+            <div className="grid grid-cols-1 sm:grid-cols-12 gap-2 items-start">
+              <div className="sm:col-span-3">
+                <label className="block text-[11px] font-medium text-muted-foreground mb-1">ID</label>
+                <input
+                  type="text"
+                  value={d.id}
+                  onChange={(e) => update(i, { id: e.target.value })}
+                  placeholder="main"
+                  className={`h-8 w-full rounded-md border bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring ${isDuplicate ? 'border-destructive' : 'border-input'}`}
+                />
+                {isDuplicate && <p className="text-[10px] text-destructive mt-0.5">Duplicate id</p>}
+              </div>
+              <div className="sm:col-span-4">
+                <label className="block text-[11px] font-medium text-muted-foreground mb-1">Label</label>
+                <input
+                  type="text"
+                  value={d.label}
+                  onChange={(e) => update(i, { label: e.target.value })}
+                  placeholder="Main server"
+                  className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+              </div>
+              <div className="sm:col-span-5">
+                <label className="block text-[11px] font-medium text-muted-foreground mb-1">JMAP URL</label>
+                <div className="flex items-center gap-2">
+                  <input
+                    type="url"
+                    value={d.url}
+                    onChange={(e) => update(i, { url: e.target.value })}
+                    placeholder="https://mail.example.com"
+                    className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                  <button
+                    onClick={() => remove(i)}
+                    className="shrink-0 text-muted-foreground hover:text-destructive"
+                    title="Remove server"
+                  >
+                    <Trash2 className="w-3.5 h-3.5" />
+                  </button>
+                </div>
+              </div>
+            </div>
+            <div>
+              <label className="block text-[11px] font-medium text-muted-foreground mb-1">
+                Email domains (comma-separated, used for auto-pick)
+              </label>
+              <input
+                type="text"
+                value={d.domains}
+                onChange={(e) => update(i, { domains: e.target.value })}
+                placeholder="example.com, example.org"
+                className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+              />
+            </div>
+            <button
+              onClick={() => update(i, { oauthExpanded: !d.oauthExpanded })}
+              className="inline-flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground"
+              type="button"
+            >
+              {d.oauthExpanded ? <ChevronDown className="w-3.5 h-3.5" /> : <ChevronRight className="w-3.5 h-3.5" />}
+              Per-server OAuth (optional, overrides global)
+            </button>
+            {d.oauthExpanded && (
+              <div className="grid grid-cols-1 sm:grid-cols-3 gap-2 pl-4 border-l border-border">
+                <div>
+                  <label className="block text-[11px] font-medium text-muted-foreground mb-1">OAuth Client ID</label>
+                  <input
+                    type="text"
+                    value={d.oauthClientId}
+                    onChange={(e) => update(i, { oauthClientId: e.target.value })}
+                    className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                </div>
+                <div>
+                  <label className="block text-[11px] font-medium text-muted-foreground mb-1">OAuth Issuer URL</label>
+                  <input
+                    type="url"
+                    value={d.oauthIssuerUrl}
+                    onChange={(e) => update(i, { oauthIssuerUrl: e.target.value })}
+                    placeholder="https://auth.example.com"
+                    className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                </div>
+                <div>
+                  <label className="block text-[11px] font-medium text-muted-foreground mb-1">OAuth Client Secret</label>
+                  <input
+                    type="password"
+                    value={d.oauthClientSecret}
+                    onChange={(e) => update(i, { oauthClientSecret: e.target.value })}
+                    className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                </div>
+              </div>
+            )}
+          </div>
+        );
+      })}
+    </div>
+  );
+}

app/(main)/admin/_tabs/auth.tsx

@@ -0,0 +1,384 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { Save, Loader2, RotateCcw, Sparkles } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+
+interface ConfigEntry {
+  // Sensitive keys (sessionSecret, oauthClientSecret) come back with
+  // `value` omitted and `hasValue` set instead - the server never echoes
+  // the raw secret to the client.
+  value?: unknown;
+  source: 'admin' | 'env' | 'default';
+  hasValue?: boolean;
+}
+
+export function AuthTab() {
+  const [config, setConfig] = useState<Record<string, ConfigEntry>>({});
+  const [edits, setEdits] = useState<Record<string, unknown>>({});
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+
+  useEffect(() => { fetchConfig(); }, []);
+
+  async function fetchConfig() {
+    setLoading(true);
+    const res = await apiFetch('/api/admin/config');
+    if (res.ok) setConfig(await res.json());
+    setLoading(false);
+  }
+
+  function handleChange(key: string, value: unknown) {
+    setEdits(prev => ({ ...prev, [key]: value }));
+    setMessage(null);
+  }
+
+  function currentValue(key: string): unknown {
+    if (key in edits) return edits[key];
+    return config[key]?.value;
+  }
+
+  async function handleSave() {
+    if (Object.keys(edits).length === 0) return;
+    setSaving(true);
+    setMessage(null);
+
+    const res = await apiFetch('/api/admin/config', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(edits),
+    });
+
+    if (res.ok) {
+      setMessage({ type: 'success', text: 'Authentication settings saved.' });
+      setEdits({});
+      await fetchConfig();
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Failed to save' });
+    }
+    setSaving(false);
+  }
+
+  async function handleRevert(key: string) {
+    const res = await apiFetch('/api/admin/config', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ key }),
+    });
+    if (res.ok) {
+      setEdits(prev => { const next = { ...prev }; delete next[key]; return next; });
+      await fetchConfig();
+    }
+  }
+
+  const [setupRunning, setSetupRunning] = useState(false);
+  const [setupOpen, setSetupOpen] = useState(false);
+  const [setupOrigin, setSetupOrigin] = useState('');
+  const [setupIssuer, setSetupIssuer] = useState('');
+  const [setupOauthOnly, setSetupOauthOnly] = useState(false);
+
+  function openSetupDialog() {
+    if (typeof window === 'undefined') return;
+    const origin = window.location.origin;
+    const jmapUrl = (currentValue('jmapServerUrl') as string | undefined)?.replace(/\/+$/, '') || '';
+    setSetupOrigin(origin);
+    setSetupIssuer(jmapUrl || origin);
+    setSetupOauthOnly(currentValue('oauthOnly') === true);
+    setSetupOpen(true);
+  }
+
+  async function handleAutoSetup() {
+    setSetupRunning(true);
+    setMessage(null);
+    try {
+      const res = await apiFetch('/api/admin/oauth/setup', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          origin: setupOrigin.trim().replace(/\/+$/, ''),
+          issuerUrl: setupIssuer.trim().replace(/\/+$/, ''),
+          oauthOnly: setupOauthOnly,
+        }),
+      });
+      const data = await res.json();
+      if (res.ok) {
+        setMessage({
+          type: 'success',
+          text: `OAuth client ${data.action} on Stalwart (${data.issuerUrl}). ${data.redirectUriCount} redirect URI(s) registered for ${data.origin}.`,
+        });
+        setEdits({});
+        setSetupOpen(false);
+        await fetchConfig();
+      } else {
+        const detail = data.detail ? ` (${typeof data.detail === 'string' ? data.detail : JSON.stringify(data.detail).slice(0, 200)})` : '';
+        setMessage({ type: 'error', text: (data.error || 'Setup failed') + detail });
+      }
+    } catch (err) {
+      setMessage({ type: 'error', text: err instanceof Error ? err.message : 'Setup failed' });
+    } finally {
+      setSetupRunning(false);
+    }
+  }
+
+  const setupOriginValid = /^https?:\/\/[^/]+$/.test(setupOrigin.trim().replace(/\/+$/, ''));
+  const setupIssuerValid = /^https?:\/\/[^/]+$/.test(setupIssuer.trim().replace(/\/+$/, ''));
+
+  const hasEdits = Object.keys(edits).length > 0;
+
+  if (loading) {
+    return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
+  }
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Authentication</h1>
+          <p className="text-sm text-muted-foreground mt-1">OAuth, SSO, and session configuration</p>
+        </div>
+        {hasEdits && (
+          <button
+            onClick={handleSave}
+            disabled={saving}
+            className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+          >
+            {saving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
+            Save changes
+          </button>
+        )}
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      <div className="rounded-lg border border-primary/30 bg-primary/5 p-4">
+        <div className="flex flex-col sm:flex-row sm:items-start sm:justify-between gap-3 sm:gap-4">
+          <div className="min-w-0">
+            <div className="flex items-center gap-2">
+              <Sparkles className="w-4 h-4 text-primary shrink-0" />
+              <h3 className="text-sm font-medium text-foreground">Auto-configure OAuth (Stalwart)</h3>
+            </div>
+            <p className="text-xs text-muted-foreground mt-1">
+              Registers an OAuth client on the connected Stalwart server, generates a client secret, and saves the settings here.
+              Requires your Stalwart account to have admin permissions.
+            </p>
+          </div>
+          <button
+            onClick={openSetupDialog}
+            disabled={setupRunning}
+            className="shrink-0 inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+          >
+            {setupRunning ? <Loader2 className="w-4 h-4 animate-spin" /> : <Sparkles className="w-4 h-4" />}
+            {setupRunning ? 'Configuring…' : 'Set up automagically'}
+          </button>
+        </div>
+      </div>
+
+      {setupOpen && (
+        <div
+          className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-sm p-4"
+          role="dialog"
+          aria-modal="true"
+          aria-labelledby="oauth-setup-title"
+          onClick={(e) => { if (e.target === e.currentTarget && !setupRunning) setSetupOpen(false); }}
+        >
+          <div className="w-full max-w-md rounded-lg border border-border bg-background shadow-xl">
+            <div className="px-5 py-4 border-b border-border">
+              <h3 id="oauth-setup-title" className="text-base font-medium text-foreground">Auto-configure OAuth</h3>
+              <p className="text-xs text-muted-foreground mt-1">
+                Verify the URLs below before continuing. The webmail and Stalwart can live on different domains.
+              </p>
+            </div>
+            <div className="px-5 py-4 space-y-4">
+              <div>
+                <label htmlFor="setup-origin" className="block text-xs font-medium text-foreground mb-1">
+                  Webmail origin
+                </label>
+                <input
+                  id="setup-origin"
+                  type="url"
+                  value={setupOrigin}
+                  onChange={(e) => setSetupOrigin(e.target.value)}
+                  disabled={setupRunning}
+                  placeholder="https://webmail.example.com"
+                  className="w-full h-9 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+                <p className="text-[11px] text-muted-foreground mt-1">
+                  Used to register redirect URIs (one per locale: <code>{setupOrigin.trim().replace(/\/+$/, '') || 'https://…'}/&lt;locale&gt;/auth/callback</code>) on Stalwart.
+                </p>
+                {!setupOriginValid && setupOrigin.length > 0 && (
+                  <p className="text-[11px] text-destructive mt-1">Must be like https://host with no path.</p>
+                )}
+              </div>
+              <div>
+                <label htmlFor="setup-issuer" className="block text-xs font-medium text-foreground mb-1">
+                  Stalwart issuer URL
+                </label>
+                <input
+                  id="setup-issuer"
+                  type="url"
+                  value={setupIssuer}
+                  onChange={(e) => setSetupIssuer(e.target.value)}
+                  disabled={setupRunning}
+                  placeholder="https://mail.example.com"
+                  className="w-full h-9 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+                <p className="text-[11px] text-muted-foreground mt-1">
+                  Where Stalwart serves <code>/.well-known/oauth-authorization-server</code>. Saved as <code>OAUTH_ISSUER_URL</code>. Pre-filled from your JMAP server URL.
+                </p>
+                {!setupIssuerValid && setupIssuer.length > 0 && (
+                  <p className="text-[11px] text-destructive mt-1">Must be like https://host with no path.</p>
+                )}
+              </div>
+              <label className="inline-flex items-center gap-2 text-xs text-foreground select-none cursor-pointer">
+                <input
+                  type="checkbox"
+                  checked={setupOauthOnly}
+                  onChange={(e) => setSetupOauthOnly(e.target.checked)}
+                  className="h-3.5 w-3.5 rounded border-input"
+                  disabled={setupRunning}
+                />
+                Also enable “OAuth only” (hide password login)
+              </label>
+            </div>
+            <div className="px-5 py-3 border-t border-border flex items-center justify-end gap-2 bg-muted/30 rounded-b-lg">
+              <button
+                onClick={() => setSetupOpen(false)}
+                disabled={setupRunning}
+                className="h-9 px-3 rounded-md border border-input bg-background text-sm text-foreground hover:bg-muted disabled:opacity-50 transition-colors"
+              >
+                Cancel
+              </button>
+              <button
+                onClick={handleAutoSetup}
+                disabled={setupRunning || !setupOriginValid || !setupIssuerValid}
+                className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+              >
+                {setupRunning ? <Loader2 className="w-4 h-4 animate-spin" /> : <Sparkles className="w-4 h-4" />}
+                {setupRunning ? 'Configuring…' : 'Configure'}
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+
+      <Section title="OAuth / OpenID Connect">
+        <Toggle label="OAuth Enabled" configKey="oauthEnabled" value={currentValue('oauthEnabled') as boolean} source={config.oauthEnabled?.source} onChange={handleChange} onRevert={handleRevert} />
+        <Toggle label="OAuth Only" description="Hide password login form when enabled" configKey="oauthOnly" value={currentValue('oauthOnly') as boolean} source={config.oauthOnly?.source} onChange={handleChange} onRevert={handleRevert} />
+        <Text label="OAuth Client ID" configKey="oauthClientId" value={currentValue('oauthClientId') as string} source={config.oauthClientId?.source} onChange={handleChange} onRevert={handleRevert} />
+        <Text label="OAuth Client Secret" configKey="oauthClientSecret" value={currentValue('oauthClientSecret') as string} source={config.oauthClientSecret?.source} onChange={handleChange} onRevert={handleRevert} type="password" placeholder={config.oauthClientSecret?.hasValue ? '••••••••  (saved - type to replace)' : undefined} />
+        <Text label="OAuth Issuer URL" configKey="oauthIssuerUrl" value={currentValue('oauthIssuerUrl') as string} source={config.oauthIssuerUrl?.source} onChange={handleChange} onRevert={handleRevert} placeholder="https://auth.example.com" />
+        <Text label="OAuth Scopes" description="Space-separated scopes that replace the defaults. Leave blank to use the built-in scope list." configKey="oauthScopes" value={currentValue('oauthScopes') as string} source={config.oauthScopes?.source} onChange={handleChange} onRevert={handleRevert} placeholder="openid email offline_access" />
+        <Text label="OAuth Extra Scopes" description="Additional space-separated scopes appended to the defaults." configKey="oauthExtraScopes" value={currentValue('oauthExtraScopes') as string} source={config.oauthExtraScopes?.source} onChange={handleChange} onRevert={handleRevert} placeholder="urn:ietf:params:oauth:..." />
+      </Section>
+
+      <Section title="Single Sign-On">
+        <Toggle label="Auto SSO" description="Automatically redirect to SSO provider on load" configKey="autoSsoEnabled" value={currentValue('autoSsoEnabled') as boolean} source={config.autoSsoEnabled?.source} onChange={handleChange} onRevert={handleRevert} />
+      </Section>
+
+      <Section title="Session & Security">
+        <Select label="Cookie SameSite" configKey="cookieSameSite" value={currentValue('cookieSameSite') as string} source={config.cookieSameSite?.source} options={['lax', 'strict', 'none']} onChange={handleChange} onRevert={handleRevert} />
+        <Text label="Allowed Frame Ancestors" configKey="allowedFrameAncestors" value={currentValue('allowedFrameAncestors') as string} source={config.allowedFrameAncestors?.source} onChange={handleChange} onRevert={handleRevert} placeholder="'none' or https://..." />
+        <Text label="Parent Origin" description="For embedded mode communication" configKey="parentOrigin" value={currentValue('parentOrigin') as string} source={config.parentOrigin?.source} onChange={handleChange} onRevert={handleRevert} />
+      </Section>
+    </div>
+  );
+}
+
+function Section({ title, children }: { title: string; children: React.ReactNode }) {
+  return (
+    <div className="border border-border rounded-lg">
+      <div className="px-4 py-3 border-b border-border bg-muted/30">
+        <h2 className="text-sm font-medium text-foreground">{title}</h2>
+      </div>
+      <div className="divide-y divide-border">{children}</div>
+    </div>
+  );
+}
+
+function SourceBadge({ source }: { source?: string }) {
+  if (!source || source === 'default') return null;
+  return (
+    <span className={`text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded ${source === 'admin' ? 'bg-primary/10 text-primary' : 'bg-muted text-muted-foreground'}`}>
+      {source}
+    </span>
+  );
+}
+
+function Text({ label, description, configKey, value, source, onChange, onRevert, placeholder, type = 'text' }: {
+  label: string; description?: string; configKey: string; value: string; source?: string;
+  onChange: (k: string, v: unknown) => void; onRevert: (k: string) => void; placeholder?: string; type?: string;
+}) {
+  return (
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+      <div className="min-w-0">
+        <div className="flex items-center gap-2">
+          <span className="text-sm text-foreground">{label}</span>
+          <SourceBadge source={source} />
+        </div>
+        {description && <p className="text-xs text-muted-foreground mt-0.5">{description}</p>}
+      </div>
+      <div className="flex items-center gap-2 w-full sm:w-auto">
+        <input type={type} value={value ?? ''} onChange={(e) => onChange(configKey, e.target.value)} placeholder={placeholder}
+          className="h-8 w-full sm:w-64 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring" />
+        {source === 'admin' && (
+          <button onClick={() => onRevert(configKey)} className="shrink-0 text-muted-foreground hover:text-foreground" title="Revert"><RotateCcw className="w-3.5 h-3.5" /></button>
+        )}
+      </div>
+    </div>
+  );
+}
+
+function Toggle({ label, description, configKey, value, source, onChange, onRevert }: {
+  label: string; description?: string; configKey: string; value: boolean; source?: string;
+  onChange: (k: string, v: unknown) => void; onRevert: (k: string) => void;
+}) {
+  return (
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+      <div className="min-w-0">
+        <div className="flex items-center gap-2">
+          <span className="text-sm text-foreground">{label}</span>
+          <SourceBadge source={source} />
+        </div>
+        {description && <p className="text-xs text-muted-foreground mt-0.5">{description}</p>}
+      </div>
+      <div className="flex items-center gap-2 shrink-0">
+        <button onClick={() => onChange(configKey, !value)}
+          className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${value ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+          <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${value ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+        </button>
+        {source === 'admin' && (
+          <button onClick={() => onRevert(configKey)} className="text-muted-foreground hover:text-foreground" title="Revert"><RotateCcw className="w-3.5 h-3.5" /></button>
+        )}
+      </div>
+    </div>
+  );
+}
+
+function Select({ label, configKey, value, source, options, onChange, onRevert }: {
+  label: string; configKey: string; value: string; source?: string; options: string[];
+  onChange: (k: string, v: unknown) => void; onRevert: (k: string) => void;
+}) {
+  return (
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+      <div className="flex items-center gap-2 min-w-0">
+        <span className="text-sm text-foreground">{label}</span>
+        <SourceBadge source={source} />
+      </div>
+      <div className="flex items-center gap-2 shrink-0">
+        <select value={value ?? ''} onChange={(e) => onChange(configKey, e.target.value)}
+          className="h-8 rounded-md border border-input bg-background px-2.5 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring">
+          {options.map(o => <option key={o} value={o}>{o}</option>)}
+        </select>
+        {source === 'admin' && (
+          <button onClick={() => onRevert(configKey)} className="text-muted-foreground hover:text-foreground" title="Revert"><RotateCcw className="w-3.5 h-3.5" /></button>
+        )}
+      </div>
+    </div>
+  );
+}

app/(main)/admin/_tabs/branding.tsx

@@ -0,0 +1,448 @@
+'use client';
+
+import { useEffect, useRef, useState } from 'react';
+import { Save, Loader2, RotateCcw, ImageIcon, Upload, Trash2 } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+
+interface ConfigEntry {
+  value?: unknown;
+  source: 'admin' | 'env' | 'default';
+  hasValue?: boolean;
+}
+
+const IMAGE_FIELDS = [
+  { key: 'faviconUrl', label: 'Favicon', accept: '.svg,.png,.ico,.webp' },
+  { key: 'appLogoLightUrl', label: 'App Logo (Light Mode)', accept: '.svg,.png,.jpg,.webp' },
+  { key: 'appLogoDarkUrl', label: 'App Logo (Dark Mode)', accept: '.svg,.png,.jpg,.webp' },
+  { key: 'loginLogoLightUrl', label: 'Login Logo (Light Mode)', accept: '.svg,.png,.jpg,.webp' },
+  { key: 'loginLogoDarkUrl', label: 'Login Logo (Dark Mode)', accept: '.svg,.png,.jpg,.webp' },
+];
+
+const TEXT_FIELDS = [
+  { key: 'loginCompanyName', label: 'Company Name' },
+  { key: 'loginImprintUrl', label: 'Imprint URL' },
+  { key: 'loginPrivacyPolicyUrl', label: 'Privacy Policy URL' },
+  { key: 'loginWebsiteUrl', label: 'Company Website URL' },
+];
+
+const PWA_IMAGE_FIELDS = [
+  { key: 'pwaIconUrl', label: 'PWA Icon', accept: '.svg,.png,.jpg,.webp' },
+];
+
+const PWA_TEXT_FIELDS = [
+  { key: 'appShortName', label: 'Short Name', placeholder: 'Shown on home screen (max ~12 chars)' },
+  { key: 'appDescription', label: 'Description', placeholder: 'App description for install prompts' },
+];
+
+const PWA_COLOR_FIELDS = [
+  { key: 'pwaThemeColor', label: 'Theme Color', defaultValue: '#ffffff' },
+  { key: 'pwaBackgroundColor', label: 'Background Color', defaultValue: '#ffffff' },
+];
+
+export function BrandingTab() {
+  const [config, setConfig] = useState<Record<string, ConfigEntry>>({});
+  const [edits, setEdits] = useState<Record<string, unknown>>({});
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [uploading, setUploading] = useState<string | null>(null);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const fileInputRefs = useRef<Record<string, HTMLInputElement | null>>({});
+
+  useEffect(() => {
+    fetchConfig();
+  }, []);
+
+  async function fetchConfig() {
+    setLoading(true);
+    const res = await apiFetch('/api/admin/config');
+    if (res.ok) setConfig(await res.json());
+    setLoading(false);
+  }
+
+  function handleChange(key: string, value: string) {
+    setEdits(prev => ({ ...prev, [key]: value }));
+    setMessage(null);
+  }
+
+  function currentValue(key: string): string {
+    if (key in edits) return edits[key] as string;
+    return (config[key]?.value as string) ?? '';
+  }
+
+  async function handleSave() {
+    if (Object.keys(edits).length === 0) return;
+    setSaving(true);
+    setMessage(null);
+
+    const res = await apiFetch('/api/admin/config', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(edits),
+    });
+
+    if (res.ok) {
+      setMessage({ type: 'success', text: 'Branding updated. Changes visible on next page load.' });
+      setEdits({});
+      await fetchConfig();
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Failed to save' });
+    }
+    setSaving(false);
+  }
+
+  async function handleUpload(slot: string, file: File) {
+    setUploading(slot);
+    setMessage(null);
+
+    const formData = new FormData();
+    formData.append('file', file);
+    formData.append('slot', slot);
+
+    const res = await apiFetch('/api/admin/branding', {
+      method: 'POST',
+      body: formData,
+    });
+
+    if (res.ok) {
+      const data = await res.json();
+      setMessage({ type: 'success', text: `Uploaded ${file.name} successfully.` });
+      setEdits(prev => {
+        const next = { ...prev };
+        delete next[slot];
+        return next;
+      });
+      setConfig(prev => ({
+        ...prev,
+        [slot]: { value: data.url, source: 'admin' },
+      }));
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Upload failed' });
+    }
+    setUploading(null);
+  }
+
+  async function handleDeleteUpload(slot: string) {
+    setMessage(null);
+
+    const res = await apiFetch('/api/admin/branding', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ slot }),
+    });
+
+    if (res.ok) {
+      setMessage({ type: 'success', text: 'Uploaded file removed. Reverted to default.' });
+      setEdits(prev => {
+        const next = { ...prev };
+        delete next[slot];
+        return next;
+      });
+      await fetchConfig();
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Failed to remove' });
+    }
+  }
+
+  async function handleRevert(key: string) {
+    const res = await apiFetch('/api/admin/config', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ key }),
+    });
+    if (res.ok) {
+      setEdits(prev => {
+        const next = { ...prev };
+        delete next[key];
+        return next;
+      });
+      await fetchConfig();
+    }
+  }
+
+  const isUploadedFile = (key: string): boolean => {
+    const val = currentValue(key);
+    return val.startsWith('/api/admin/branding/');
+  };
+
+  const hasEdits = Object.keys(edits).length > 0;
+
+  if (loading) {
+    return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
+  }
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Branding</h1>
+          <p className="text-sm text-muted-foreground mt-1">Customize logos, favicon, and company information</p>
+        </div>
+        {hasEdits && (
+          <button
+            onClick={handleSave}
+            disabled={saving}
+            className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+          >
+            {saving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
+            Save changes
+          </button>
+        )}
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Images & Logos</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Upload a file or enter a URL. Supported formats: SVG, PNG, JPEG, WebP, ICO (max 2 MB)</p>
+        </div>
+        <div className="divide-y divide-border">
+          {IMAGE_FIELDS.map(field => (
+            <div key={field.key} className="px-4 py-3">
+              <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="flex items-center gap-2 min-w-0">
+                  <label className="text-sm text-foreground">{field.label}</label>
+                  {config[field.key]?.source === 'admin' && (
+                    <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">
+                      {isUploadedFile(field.key) ? 'uploaded' : 'admin'}
+                    </span>
+                  )}
+                </div>
+                <div className="flex items-center gap-2 w-full sm:w-auto">
+                  <input
+                    type="text"
+                    value={currentValue(field.key)}
+                    onChange={(e) => handleChange(field.key, e.target.value)}
+                    placeholder="Enter URL or upload a file"
+                    className="h-8 w-full sm:w-64 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                  <input
+                    ref={el => { fileInputRefs.current[field.key] = el; }}
+                    type="file"
+                    accept={field.accept}
+                    className="hidden"
+                    onChange={(e) => {
+                      const file = e.target.files?.[0];
+                      if (file) handleUpload(field.key, file);
+                      e.target.value = '';
+                    }}
+                  />
+                  <button
+                    onClick={() => fileInputRefs.current[field.key]?.click()}
+                    disabled={uploading === field.key}
+                    className="inline-flex items-center gap-1.5 h-8 px-2.5 rounded-md border border-input bg-background text-sm text-foreground hover:bg-muted disabled:opacity-50 transition-colors"
+                    title="Upload file"
+                  >
+                    {uploading === field.key ? <Loader2 className="w-3.5 h-3.5 animate-spin" /> : <Upload className="w-3.5 h-3.5" />}
+                  </button>
+                  {isUploadedFile(field.key) && (
+                    <button
+                      onClick={() => handleDeleteUpload(field.key)}
+                      className="text-muted-foreground hover:text-destructive transition-colors"
+                      title="Remove uploaded file"
+                    >
+                      <Trash2 className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                  {config[field.key]?.source === 'admin' && !isUploadedFile(field.key) && (
+                    <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                      <RotateCcw className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                </div>
+              </div>
+              {currentValue(field.key) && (
+                <div className="mt-2 flex items-center gap-2">
+                  <ImageIcon className="w-3.5 h-3.5 text-muted-foreground" />
+                  <div className="h-8 w-auto bg-muted rounded flex items-center justify-center px-2">
+                    <img
+                      src={currentValue(field.key)}
+                      alt={field.label}
+                      className="max-h-6 max-w-[200px] object-contain"
+                      onError={(e) => { (e.target as HTMLImageElement).style.display = 'none'; }}
+                    />
+                  </div>
+                </div>
+              )}
+            </div>
+          ))}
+        </div>
+      </div>
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Progressive Web App</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Shown when users install the webmail to their home screen. Leave fields blank to fall back to the favicon and app name.</p>
+        </div>
+        <div className="divide-y divide-border">
+          {PWA_IMAGE_FIELDS.map(field => (
+            <div key={field.key} className="px-4 py-3">
+              <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="flex items-center gap-2 min-w-0">
+                  <label className="text-sm text-foreground">{field.label}</label>
+                  {config[field.key]?.source === 'admin' && (
+                    <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">
+                      {isUploadedFile(field.key) ? 'uploaded' : 'admin'}
+                    </span>
+                  )}
+                </div>
+                <div className="flex items-center gap-2 w-full sm:w-auto">
+                  <input
+                    type="text"
+                    value={currentValue(field.key)}
+                    onChange={(e) => handleChange(field.key, e.target.value)}
+                    placeholder="Enter URL or upload a file"
+                    className="h-8 w-full sm:w-64 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                  <input
+                    ref={el => { fileInputRefs.current[field.key] = el; }}
+                    type="file"
+                    accept={field.accept}
+                    className="hidden"
+                    onChange={(e) => {
+                      const file = e.target.files?.[0];
+                      if (file) handleUpload(field.key, file);
+                      e.target.value = '';
+                    }}
+                  />
+                  <button
+                    onClick={() => fileInputRefs.current[field.key]?.click()}
+                    disabled={uploading === field.key}
+                    className="inline-flex items-center gap-1.5 h-8 px-2.5 rounded-md border border-input bg-background text-sm text-foreground hover:bg-muted disabled:opacity-50 transition-colors"
+                    title="Upload file"
+                  >
+                    {uploading === field.key ? <Loader2 className="w-3.5 h-3.5 animate-spin" /> : <Upload className="w-3.5 h-3.5" />}
+                  </button>
+                  {isUploadedFile(field.key) && (
+                    <button
+                      onClick={() => handleDeleteUpload(field.key)}
+                      className="text-muted-foreground hover:text-destructive transition-colors"
+                      title="Remove uploaded file"
+                    >
+                      <Trash2 className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                  {config[field.key]?.source === 'admin' && !isUploadedFile(field.key) && (
+                    <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                      <RotateCcw className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                </div>
+              </div>
+              {currentValue(field.key) && (
+                <div className="mt-2 flex items-center gap-2">
+                  <ImageIcon className="w-3.5 h-3.5 text-muted-foreground" />
+                  <div className="h-8 w-auto bg-muted rounded flex items-center justify-center px-2">
+                    <img
+                      src={currentValue(field.key)}
+                      alt={field.label}
+                      className="max-h-6 max-w-[200px] object-contain"
+                      onError={(e) => { (e.target as HTMLImageElement).style.display = 'none'; }}
+                    />
+                  </div>
+                </div>
+              )}
+            </div>
+          ))}
+          {PWA_TEXT_FIELDS.map(field => (
+            <div key={field.key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div className="flex items-center gap-2 min-w-0">
+                <label className="text-sm text-foreground">{field.label}</label>
+                {config[field.key]?.source === 'admin' && (
+                  <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">admin</span>
+                )}
+              </div>
+              <div className="flex items-center gap-2 w-full sm:w-auto">
+                <input
+                  type="text"
+                  value={currentValue(field.key)}
+                  onChange={(e) => handleChange(field.key, e.target.value)}
+                  placeholder={field.placeholder}
+                  className="h-8 w-full sm:w-72 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+                {config[field.key]?.source === 'admin' && (
+                  <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                    <RotateCcw className="w-3.5 h-3.5" />
+                  </button>
+                )}
+              </div>
+            </div>
+          ))}
+          {PWA_COLOR_FIELDS.map(field => {
+            const value = currentValue(field.key) || field.defaultValue;
+            return (
+              <div key={field.key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="flex items-center gap-2 min-w-0">
+                  <label className="text-sm text-foreground">{field.label}</label>
+                  {config[field.key]?.source === 'admin' && (
+                    <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">admin</span>
+                  )}
+                </div>
+                <div className="flex items-center gap-2 w-full sm:w-auto">
+                  <input
+                    type="color"
+                    value={/^#[0-9a-fA-F]{6}$/.test(value) ? value : field.defaultValue}
+                    onChange={(e) => handleChange(field.key, e.target.value)}
+                    className="h-8 w-10 cursor-pointer rounded-md border border-input bg-background p-0.5"
+                    title="Pick a color"
+                  />
+                  <input
+                    type="text"
+                    value={currentValue(field.key)}
+                    onChange={(e) => handleChange(field.key, e.target.value)}
+                    placeholder={field.defaultValue}
+                    className="h-8 w-full sm:w-32 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm font-mono text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                  {config[field.key]?.source === 'admin' && (
+                    <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                      <RotateCcw className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                </div>
+              </div>
+            );
+          })}
+        </div>
+      </div>
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Company Information</h2>
+        </div>
+        <div className="divide-y divide-border">
+          {TEXT_FIELDS.map(field => (
+            <div key={field.key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div className="flex items-center gap-2 min-w-0">
+                <label className="text-sm text-foreground">{field.label}</label>
+                {config[field.key]?.source === 'admin' && (
+                  <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">admin</span>
+                )}
+              </div>
+              <div className="flex items-center gap-2 w-full sm:w-auto">
+                <input
+                  type="text"
+                  value={currentValue(field.key)}
+                  onChange={(e) => handleChange(field.key, e.target.value)}
+                  placeholder={field.key.includes('Url') ? 'https://...' : 'Enter value'}
+                  className="h-8 w-full sm:w-72 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+                {config[field.key]?.source === 'admin' && (
+                  <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                    <RotateCcw className="w-3.5 h-3.5" />
+                  </button>
+                )}
+              </div>
+            </div>
+          ))}
+        </div>
+      </div>
+    </div>
+  );
+}

app/(main)/admin/_tabs/dashboard.tsx

@@ -0,0 +1,214 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { AlertTriangle } from 'lucide-react';
+import { SettingsSection, SettingItem, ToggleSwitch } from '@/components/settings/settings-section';
+import type { AuditEntry } from '@/lib/admin/types';
+import { apiFetch } from '@/lib/browser-navigation';
+
+interface AdminStatus {
+  enabled: boolean;
+  authenticated: boolean;
+  lastLogin: string | null;
+  passwordChangedAt: string | null;
+}
+
+interface ConfigData {
+  appName?: string;
+  jmapServerUrl?: string;
+  settingsSyncEnabled?: boolean;
+  stalwartFeaturesEnabled?: boolean;
+  oauthEnabled?: boolean;
+  devMode?: boolean;
+}
+
+export function DashboardTab() {
+  const [status, setStatus] = useState<AdminStatus | null>(null);
+  const [recentActivity, setRecentActivity] = useState<AuditEntry[]>([]);
+  const [config, setConfig] = useState<ConfigData | null>(null);
+  const [, setConfigSources] = useState<Record<string, { value?: unknown; source: string; hasValue?: boolean }> | null>(null);
+  const [warnings, setWarnings] = useState<string[]>([]);
+  const [pluginCount, setPluginCount] = useState(0);
+  const [themeCount, setThemeCount] = useState(0);
+  const [policyRuleCount, setPolicyRuleCount] = useState(0);
+  const [accountCounts, setAccountCounts] = useState<{ total: number; active7d: number } | null>(null);
+  const [jmapHealth, setJmapHealth] = useState<'unknown' | 'ok' | 'error'>('unknown');
+
+  useEffect(() => {
+    fetchDashboardData();
+  }, []);
+
+  async function fetchDashboardData() {
+    const [statusRes, auditRes, configRes, adminConfigRes, pluginRes, themeRes, policyRes, telemetryRes] = await Promise.all([
+      apiFetch('/api/admin/auth'),
+      apiFetch('/api/admin/audit?limit=10'),
+      apiFetch('/api/config'),
+      apiFetch('/api/admin/config'),
+      apiFetch('/api/admin/plugins').catch(() => null),
+      apiFetch('/api/admin/themes').catch(() => null),
+      apiFetch('/api/admin/policy').catch(() => null),
+      apiFetch('/api/admin/telemetry').catch(() => null),
+    ]);
+
+    if (statusRes.ok) setStatus(await statusRes.json());
+    if (auditRes.ok) {
+      const data = await auditRes.json();
+      setRecentActivity(data.entries || []);
+    }
+    let configData: ConfigData | null = null;
+    if (configRes.ok) {
+      configData = await configRes.json();
+      setConfig(configData);
+    }
+
+    if (pluginRes?.ok) {
+      const plugins = await pluginRes.json();
+      setPluginCount(Array.isArray(plugins) ? plugins.length : 0);
+    }
+    if (themeRes?.ok) {
+      const themes = await themeRes.json();
+      setThemeCount(Array.isArray(themes) ? themes.length : 0);
+    }
+    if (policyRes?.ok) {
+      const policy = await policyRes.json();
+      const restrictionCount = policy.restrictions ? Object.keys(policy.restrictions).length : 0;
+      const disabledGates = policy.features ? Object.values(policy.features).filter((v: unknown) => !v).length : 0;
+      setPolicyRuleCount(restrictionCount + disabledGates);
+    }
+    if (telemetryRes?.ok) {
+      const telemetry = await telemetryRes.json();
+      if (telemetry.accountCounts && typeof telemetry.accountCounts.total === 'number') {
+        setAccountCounts(telemetry.accountCounts);
+      }
+    }
+
+    if (configData?.jmapServerUrl) {
+      try {
+        const jmapRes = await apiFetch('/api/config');
+        setJmapHealth(jmapRes.ok ? 'ok' : 'error');
+      } catch {
+        setJmapHealth('error');
+      }
+    }
+
+    const w: string[] = [];
+    if (adminConfigRes.ok) {
+      const sources = await adminConfigRes.json();
+      setConfigSources(sources);
+      const sessionSecret = sources?.sessionSecret;
+      // Server redacts the raw value for sensitive keys; rely on hasValue,
+      // which is false when unset or matching a known placeholder default.
+      if (!sessionSecret?.hasValue) {
+        w.push('SESSION_SECRET is not set or using a default value. Sessions are insecure.');
+      }
+      const adminPassword = sources?.adminPassword;
+      if (adminPassword?.value && adminPassword.source === 'env') {
+        w.push('ADMIN_PASSWORD is still set in environment variables. Remove it now that the hash is stored securely.');
+      }
+    }
+    setWarnings(w);
+  }
+
+  const jmapUrl = config?.jmapServerUrl || '-';
+  const jmapHostname = jmapUrl !== '-' ? (() => { try { return new URL(jmapUrl).hostname; } catch { return jmapUrl; } })() : '-';
+
+  return (
+    <div className="max-w-3xl space-y-8">
+      {warnings.map((msg, i) => (
+        <div key={i} className="flex items-start gap-3 rounded-lg border border-warning/20 bg-warning/10 p-4">
+          <AlertTriangle className="w-5 h-5 text-warning mt-0.5 shrink-0" />
+          <p className="text-sm text-warning">{msg}</p>
+        </div>
+      ))}
+
+      <SettingsSection title="Server" description="Application and connection details">
+        <SettingItem label="Application">
+          <span className="text-sm text-foreground">{config?.appName || '-'}</span>
+        </SettingItem>
+        <SettingItem label="JMAP Server" description={jmapUrl !== '-' ? jmapUrl : undefined}>
+          <span className="text-sm text-foreground">{jmapHostname}</span>
+        </SettingItem>
+        <SettingItem label="JMAP Connection">
+          <span className={`inline-flex items-center gap-1.5 text-sm font-medium ${
+            jmapHealth === 'ok' ? 'text-green-600 dark:text-green-400' : jmapHealth === 'error' ? 'text-red-600 dark:text-red-400' : 'text-muted-foreground'
+          }`}>
+            <span className={`w-2 h-2 rounded-full ${
+              jmapHealth === 'ok' ? 'bg-green-500' : jmapHealth === 'error' ? 'bg-red-500' : 'bg-muted-foreground/40'
+            }`} />
+            {jmapHealth === 'ok' ? 'Connected' : jmapHealth === 'error' ? 'Error' : 'Unknown'}
+          </span>
+        </SettingItem>
+        <SettingItem label="Last Login">
+          <span className="text-sm text-foreground">
+            {status?.lastLogin ? new Date(status.lastLogin).toLocaleString() : 'Never'}
+          </span>
+        </SettingItem>
+      </SettingsSection>
+
+      <SettingsSection title="Features" description="Enabled integrations and modules">
+        <SettingItem label="Admin Panel" description="Administrative access to server configuration">
+          <ToggleSwitch checked={!!status?.enabled} onChange={() => {}} disabled />
+        </SettingItem>
+        <SettingItem label="Settings Sync" description="Synchronize user settings across devices">
+          <ToggleSwitch checked={!!config?.settingsSyncEnabled} onChange={() => {}} disabled />
+        </SettingItem>
+        <SettingItem label="OAuth" description="OAuth authentication provider">
+          <ToggleSwitch checked={!!config?.oauthEnabled} onChange={() => {}} disabled />
+        </SettingItem>
+        <SettingItem label="Stalwart Integration" description="Stalwart mail server features">
+          <ToggleSwitch checked={config?.stalwartFeaturesEnabled !== false} onChange={() => {}} disabled />
+        </SettingItem>
+      </SettingsSection>
+
+      <SettingsSection title="Accounts" description="Unique logins recorded over the last 90 days">
+        <SettingItem label="Total accounts" description="Distinct identities seen in the retention window">
+          <span className="text-sm text-foreground">{accountCounts?.total ?? '-'}</span>
+        </SettingItem>
+        <SettingItem label="Active in last 7 days" description="Identities with a login in the past week">
+          <span className="text-sm text-foreground">{accountCounts?.active7d ?? '-'}</span>
+        </SettingItem>
+      </SettingsSection>
+
+      <SettingsSection title="Extensions" description="Installed plugins, themes, and policy rules">
+        <SettingItem label="Plugins">
+          <span className="text-sm text-foreground">{pluginCount}</span>
+        </SettingItem>
+        <SettingItem label="Themes">
+          <span className="text-sm text-foreground">{themeCount}</span>
+        </SettingItem>
+        <SettingItem label="Policy Rules">
+          <span className="text-sm text-foreground">{policyRuleCount}</span>
+        </SettingItem>
+      </SettingsSection>
+
+      <SettingsSection title="Recent Activity" description="Latest administrative actions">
+        {recentActivity.length === 0 ? (
+          <div className="py-4 text-sm text-muted-foreground">
+            No activity recorded yet
+          </div>
+        ) : (
+          recentActivity.map((entry, i) => (
+            <SettingItem
+              key={i}
+              label={entry.action}
+              description={formatDetail(entry.detail) || undefined}
+            >
+              <div className="flex items-center gap-3 text-xs text-muted-foreground">
+                <span>{entry.ip}</span>
+                <span>{new Date(entry.ts).toLocaleString()}</span>
+              </div>
+            </SettingItem>
+          ))
+        )}
+      </SettingsSection>
+    </div>
+  );
+}
+
+function formatDetail(detail: Record<string, unknown>): string {
+  if (!detail || Object.keys(detail).length === 0) return '';
+  if (detail.key) return `${detail.key}: ${detail.old} → ${detail.new}`;
+  if (detail.reason) return String(detail.reason);
+  if (detail.changes && Array.isArray(detail.changes)) return `${detail.changes.length} setting(s) changed`;
+  return JSON.stringify(detail).slice(0, 80);
+}

app/(main)/admin/_tabs/logs.tsx

@@ -0,0 +1,174 @@
+'use client';
+
+import { useEffect, useState, useCallback } from 'react';
+import { RefreshCw } from 'lucide-react';
+import type { AuditEntry } from '@/lib/admin/types';
+import { apiFetch } from '@/lib/browser-navigation';
+
+export function LogsTab() {
+  const [entries, setEntries] = useState<AuditEntry[]>([]);
+  const [total, setTotal] = useState(0);
+  const [page, setPage] = useState(1);
+  const [loading, setLoading] = useState(true);
+  const [actionFilter, setActionFilter] = useState('');
+  const limit = 50;
+
+  const fetchLogs = useCallback(async () => {
+    setLoading(true);
+    const params = new URLSearchParams({ page: String(page), limit: String(limit) });
+    if (actionFilter) params.set('action', actionFilter);
+
+    const res = await apiFetch(`/api/admin/audit?${params}`);
+    if (res.ok) {
+      const data = await res.json();
+      setEntries(data.entries || []);
+      setTotal(data.total || 0);
+    }
+    setLoading(false);
+  }, [page, actionFilter]);
+
+  useEffect(() => { fetchLogs(); }, [fetchLogs]);
+
+  const totalPages = Math.max(1, Math.ceil(total / limit));
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Audit Log</h1>
+          <p className="text-sm text-muted-foreground mt-1">{total} total entries</p>
+        </div>
+        <button
+          onClick={fetchLogs}
+          className="inline-flex items-center gap-2 h-9 px-3 rounded-md border border-input bg-background text-sm text-foreground hover:bg-accent transition-colors"
+        >
+          <RefreshCw className={`w-4 h-4 ${loading ? 'animate-spin' : ''}`} />
+          Refresh
+        </button>
+      </div>
+
+      <div className="flex items-center gap-3">
+        <select
+          value={actionFilter}
+          onChange={(e) => { setActionFilter(e.target.value); setPage(1); }}
+          className="h-8 w-full sm:w-auto rounded-md border border-input bg-background px-2.5 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+        >
+          <option value="">All actions</option>
+          <option value="admin.login">Login</option>
+          <option value="admin.logout">Logout</option>
+          <option value="admin.login_failed">Login Failed</option>
+          <option value="admin.login_blocked">Login Blocked</option>
+          <option value="admin.change-password">Password Change</option>
+          <option value="config.update">Config Update</option>
+          <option value="config.revert">Config Revert</option>
+          <option value="policy.update">Policy Update</option>
+        </select>
+      </div>
+
+      <div className="sm:hidden space-y-2">
+        {loading && entries.length === 0 ? (
+          <div className="rounded-lg border border-border px-4 py-8 text-center text-sm text-muted-foreground">Loading...</div>
+        ) : entries.length === 0 ? (
+          <div className="rounded-lg border border-border px-4 py-8 text-center text-sm text-muted-foreground">No entries found</div>
+        ) : (
+          entries.map((entry, i) => (
+            <div key={i} className="rounded-lg border border-border p-3 space-y-1.5">
+              <div className="flex items-center justify-between gap-2">
+                <span className="text-xs font-mono px-2 py-0.5 rounded bg-muted text-muted-foreground truncate">
+                  {entry.action}
+                </span>
+                <span className="text-[11px] text-muted-foreground whitespace-nowrap">
+                  {new Date(entry.ts).toLocaleString()}
+                </span>
+              </div>
+              <div className="text-xs text-foreground break-words">
+                {formatDetail(entry.detail)}
+              </div>
+              <div className="text-[11px] text-muted-foreground font-mono">
+                {entry.ip}
+              </div>
+            </div>
+          ))
+        )}
+      </div>
+
+      <div className="hidden sm:block border border-border rounded-lg overflow-x-auto">
+        <table className="w-full text-sm">
+          <thead>
+            <tr className="border-b border-border bg-muted/30">
+              <th className="text-left px-4 py-2 font-medium text-muted-foreground whitespace-nowrap">Time</th>
+              <th className="text-left px-4 py-2 font-medium text-muted-foreground whitespace-nowrap">Action</th>
+              <th className="text-left px-4 py-2 font-medium text-muted-foreground">Details</th>
+              <th className="text-left px-4 py-2 font-medium text-muted-foreground whitespace-nowrap">IP</th>
+            </tr>
+          </thead>
+          <tbody className="divide-y divide-border">
+            {loading && entries.length === 0 ? (
+              <tr>
+                <td colSpan={4} className="px-4 py-8 text-center text-muted-foreground">Loading...</td>
+              </tr>
+            ) : entries.length === 0 ? (
+              <tr>
+                <td colSpan={4} className="px-4 py-8 text-center text-muted-foreground">No entries found</td>
+              </tr>
+            ) : (
+              entries.map((entry, i) => (
+                <tr key={i} className="hover:bg-muted/20">
+                  <td className="px-4 py-2 text-xs text-muted-foreground whitespace-nowrap">
+                    {new Date(entry.ts).toLocaleString()}
+                  </td>
+                  <td className="px-4 py-2">
+                    <span className="text-xs font-mono px-2 py-0.5 rounded bg-muted text-muted-foreground">
+                      {entry.action}
+                    </span>
+                  </td>
+                  <td className="px-4 py-2 text-xs text-foreground max-w-xs truncate">
+                    {formatDetail(entry.detail)}
+                  </td>
+                  <td className="px-4 py-2 text-xs text-muted-foreground font-mono">
+                    {entry.ip}
+                  </td>
+                </tr>
+              ))
+            )}
+          </tbody>
+        </table>
+      </div>
+
+      {totalPages > 1 && (
+        <div className="flex items-center justify-between">
+          <p className="text-xs text-muted-foreground">
+            Page {page} of {totalPages}
+          </p>
+          <div className="flex items-center gap-2">
+            <button
+              onClick={() => setPage(p => Math.max(1, p - 1))}
+              disabled={page === 1}
+              className="h-8 px-3 rounded-md border border-input bg-background text-sm disabled:opacity-50 hover:bg-accent transition-colors"
+            >
+              Previous
+            </button>
+            <button
+              onClick={() => setPage(p => Math.min(totalPages, p + 1))}
+              disabled={page === totalPages}
+              className="h-8 px-3 rounded-md border border-input bg-background text-sm disabled:opacity-50 hover:bg-accent transition-colors"
+            >
+              Next
+            </button>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
+
+function formatDetail(detail: Record<string, unknown>): string {
+  if (!detail || Object.keys(detail).length === 0) return '-';
+  if (detail.reason) return String(detail.reason);
+  if (detail.key) return `${detail.key}: ${JSON.stringify(detail.old)} → ${JSON.stringify(detail.new)}`;
+  if (detail.changes && Array.isArray(detail.changes)) {
+    return detail.changes.map((c: Record<string, unknown>) => `${c.key}`).join(', ');
+  }
+  if (detail.restrictionCount !== undefined) return `${detail.restrictionCount} restriction(s)`;
+  return JSON.stringify(detail).slice(0, 100);
+}

app/(main)/admin/_tabs/marketplace.tsx

@@ -0,0 +1,426 @@
+'use client';
+
+import { useEffect, useState, useCallback } from 'react';
+import Link from 'next/link';
+import { Search, Download, Check, Loader2, Store, Puzzle, SwatchBook, Star, Eye, AlertTriangle, ArrowUpCircle } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+import { compareVersions, isVersionSatisfied } from '@/lib/version-compare';
+
+const CURRENT_APP_VERSION = process.env.NEXT_PUBLIC_APP_VERSION || '0.0.0';
+
+interface Extension {
+  slug: string;
+  name: string;
+  type: 'plugin' | 'theme';
+  pluginType: string | null;
+  description: string;
+  permissions: string[];
+  tags: string[];
+  totalDownloads: number;
+  featured: boolean;
+  minAppVersion: string | null;
+  latestVersion: string | null;
+  installed: boolean;
+  installedVersion: string | null;
+  iconUrl: string | null;
+  bannerUrl: string | null;
+  author: {
+    displayName: string;
+    githubLogin: string;
+    avatarUrl: string | null;
+  } | null;
+}
+
+interface SearchResult {
+  data: Extension[];
+  meta: {
+    page: number;
+    perPage: number;
+    total: number;
+  };
+}
+
+type TypeFilter = 'all' | 'plugin' | 'theme';
+
+export function MarketplaceTab() {
+  const [extensions, setExtensions] = useState<Extension[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [query, setQuery] = useState('');
+  const [typeFilter, setTypeFilter] = useState<TypeFilter>('all');
+  const [page, setPage] = useState(1);
+  const [total, setTotal] = useState(0);
+  const [perPage] = useState(12);
+  const [installing, setInstalling] = useState<string | null>(null);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const [error, setError] = useState<string | null>(null);
+
+  const fetchExtensions = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      const params = new URLSearchParams();
+      if (query) params.set('q', query);
+      if (typeFilter !== 'all') params.set('type', typeFilter);
+      params.set('page', String(page));
+      params.set('perPage', String(perPage));
+      params.set('sort', 'newest');
+
+      const res = await apiFetch(`/api/admin/marketplace?${params}`);
+      if (!res.ok) {
+        const data = await res.json().catch(() => ({}));
+        setError(data.error || 'Failed to connect to extension directory');
+        setExtensions([]);
+        return;
+      }
+
+      const data: SearchResult = await res.json();
+      setExtensions(data.data || []);
+      setTotal(data.meta?.total || 0);
+    } catch {
+      setError('Failed to connect to extension directory. Make sure it is running.');
+      setExtensions([]);
+    } finally {
+      setLoading(false);
+    }
+  }, [query, typeFilter, page, perPage]);
+
+  useEffect(() => {
+    fetchExtensions();
+  }, [fetchExtensions]);
+
+  const [searchInput, setSearchInput] = useState('');
+  useEffect(() => {
+    const t = setTimeout(() => {
+      setQuery(searchInput);
+      setPage(1);
+    }, 300);
+    return () => clearTimeout(t);
+  }, [searchInput]);
+
+  async function handleInstall(ext: Extension) {
+    if (ext.minAppVersion && !isVersionSatisfied(CURRENT_APP_VERSION, ext.minAppVersion)) {
+      setMessage({
+        type: 'error',
+        text: `"${ext.name}" requires app v${ext.minAppVersion}+. You are running v${CURRENT_APP_VERSION}.`,
+      });
+      return;
+    }
+    const isUpdate = ext.installed;
+    const targetVersion = ext.latestVersion || '1.0.0';
+    setInstalling(ext.slug);
+    setMessage(null);
+
+    try {
+      const res = await apiFetch('/api/admin/marketplace', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          slug: ext.slug,
+          version: targetVersion,
+          type: ext.type,
+        }),
+      });
+
+      const data = await res.json();
+
+      if (res.ok) {
+        const warnings = data.warnings?.length ? ` (${data.warnings.length} warning(s))` : '';
+        setMessage({
+          type: 'success',
+          text: isUpdate
+            ? `"${ext.name}" updated to v${targetVersion}${warnings}`
+            : `"${ext.name}" installed successfully${warnings}`,
+        });
+        setExtensions(prev => prev.map(e =>
+          e.slug === ext.slug
+            ? { ...e, installed: true, installedVersion: targetVersion }
+            : e,
+        ));
+      } else {
+        setMessage({ type: 'error', text: data.error || (isUpdate ? 'Update failed' : 'Installation failed') });
+      }
+    } catch {
+      setMessage({ type: 'error', text: isUpdate ? 'Update failed - network error' : 'Installation failed - network error' });
+    } finally {
+      setInstalling(null);
+    }
+  }
+
+  const totalPages = Math.ceil(total / perPage);
+
+  return (
+    <div className="space-y-6">
+      <div>
+        <h1 className="text-2xl font-semibold text-foreground">Marketplace</h1>
+        <p className="text-sm text-muted-foreground mt-1">
+          Browse and install plugins and themes from the BulwarkMail extension directory
+        </p>
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      <div className="flex flex-col sm:flex-row sm:items-center gap-3">
+        <div className="relative flex-1 min-w-0">
+          <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
+          <input
+            type="text"
+            placeholder="Search extensions..."
+            value={searchInput}
+            onChange={(e) => setSearchInput(e.target.value)}
+            className="w-full h-9 pl-9 pr-3 rounded-md border border-input bg-background text-sm text-foreground placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring/20 focus:border-ring"
+          />
+        </div>
+        <div className="flex items-center gap-1 rounded-md border border-input bg-background p-0.5 self-start sm:self-auto">
+          {(['all', 'plugin', 'theme'] as const).map((t) => (
+            <button
+              key={t}
+              onClick={() => { setTypeFilter(t); setPage(1); }}
+              className={`h-8 px-3 rounded text-sm font-medium transition-colors ${
+                typeFilter === t
+                  ? 'bg-accent text-accent-foreground'
+                  : 'text-muted-foreground hover:text-foreground'
+              }`}
+            >
+              {t === 'all' ? 'All' : t === 'plugin' ? 'Plugins' : 'Themes'}
+            </button>
+          ))}
+        </div>
+      </div>
+
+      {error && (
+        <div className="border border-border rounded-lg p-12 text-center">
+          <Store className="w-10 h-10 text-muted-foreground/40 mx-auto mb-3" />
+          <p className="text-sm text-muted-foreground">{error}</p>
+          <p className="text-xs text-muted-foreground mt-1">
+            Start the extension directory server on the configured port
+          </p>
+          <button
+            onClick={fetchExtensions}
+            className="mt-4 inline-flex items-center gap-2 h-8 px-3 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90"
+          >
+            Retry
+          </button>
+        </div>
+      )}
+
+      {loading && !error && (
+        <div className="flex items-center justify-center py-12">
+          <Loader2 className="w-5 h-5 animate-spin text-muted-foreground" />
+          <span className="ml-2 text-sm text-muted-foreground">Searching extensions...</span>
+        </div>
+      )}
+
+      {!loading && !error && extensions.length === 0 && (
+        <div className="border border-border rounded-lg p-12 text-center">
+          <Store className="w-10 h-10 text-muted-foreground/40 mx-auto mb-3" />
+          <p className="text-sm text-muted-foreground">No extensions found</p>
+          {query && (
+            <p className="text-xs text-muted-foreground mt-1">
+              Try a different search term
+            </p>
+          )}
+        </div>
+      )}
+
+      {!loading && !error && extensions.length > 0 && (
+        <>
+          <div className="text-xs text-muted-foreground">
+            {total} extension{total !== 1 ? 's' : ''} found
+          </div>
+          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
+            {extensions.map((ext) => (
+              <ExtensionCard
+                key={ext.slug}
+                extension={ext}
+                installing={installing === ext.slug}
+                onInstall={() => handleInstall(ext)}
+              />
+            ))}
+          </div>
+
+          {totalPages > 1 && (
+            <div className="flex items-center justify-center gap-2 pt-2">
+              <button
+                onClick={() => setPage(p => Math.max(1, p - 1))}
+                disabled={page <= 1}
+                className="h-8 px-3 rounded-md border border-border text-sm text-foreground hover:bg-muted disabled:opacity-50 disabled:cursor-not-allowed"
+              >
+                Previous
+              </button>
+              <span className="text-sm text-muted-foreground">
+                Page {page} of {totalPages}
+              </span>
+              <button
+                onClick={() => setPage(p => Math.min(totalPages, p + 1))}
+                disabled={page >= totalPages}
+                className="h-8 px-3 rounded-md border border-border text-sm text-foreground hover:bg-muted disabled:opacity-50 disabled:cursor-not-allowed"
+              >
+                Next
+              </button>
+            </div>
+          )}
+        </>
+      )}
+    </div>
+  );
+}
+
+function ExtensionCard({
+  extension,
+  installing,
+  onInstall,
+}: {
+  extension: Extension;
+  installing: boolean;
+  onInstall: () => void;
+}) {
+  const isPlugin = extension.type === 'plugin';
+  const previewHref = `/admin/marketplace/${encodeURIComponent(extension.slug)}`;
+  const versionMismatch = !!extension.minAppVersion
+    && !isVersionSatisfied(CURRENT_APP_VERSION, extension.minAppVersion);
+  const updateAvailable = extension.installed
+    && !!extension.installedVersion
+    && !!extension.latestVersion
+    && compareVersions(extension.latestVersion, extension.installedVersion) > 0
+    && !versionMismatch;
+
+  return (
+    <div className="group relative border border-border rounded-lg overflow-hidden hover:border-ring/30 transition-colors">
+      {extension.bannerUrl && (
+        <Link href={previewHref} className="block focus:outline-none">
+          <img
+            src={extension.bannerUrl}
+            alt=""
+            className="block h-24 w-full object-cover border-b border-border"
+            loading="lazy"
+          />
+        </Link>
+      )}
+      <Link href={previewHref} className="block p-4 focus:outline-none focus-visible:ring-2 focus-visible:ring-ring/40 rounded-lg">
+        <div className="flex items-start gap-3">
+          <div className="w-10 h-10 rounded-md bg-muted flex items-center justify-center shrink-0 overflow-hidden">
+            {extension.iconUrl ? (
+              <img
+                src={extension.iconUrl}
+                alt=""
+                className="w-10 h-10 object-cover"
+                loading="lazy"
+              />
+            ) : isPlugin ? (
+              <Puzzle className="w-5 h-5 text-muted-foreground" />
+            ) : (
+              <SwatchBook className="w-5 h-5 text-muted-foreground" />
+            )}
+          </div>
+          <div className="min-w-0 flex-1">
+            <div className="flex items-center gap-1.5">
+              <span className="text-sm font-medium text-foreground truncate group-hover:underline">
+                {extension.name}
+              </span>
+              {extension.featured && (
+                <Star className="w-3.5 h-3.5 text-warning shrink-0 fill-warning" />
+              )}
+            </div>
+            <div className="flex items-center gap-1.5 mt-0.5">
+              <span className={`text-[10px] px-1.5 py-0.5 rounded font-medium ${
+                isPlugin
+                  ? 'bg-blue-100 text-blue-700 dark:bg-blue-950/30 dark:text-blue-400'
+                  : 'bg-purple-100 text-purple-700 dark:bg-purple-950/30 dark:text-purple-400'
+              }`}>
+                {isPlugin ? (extension.pluginType || 'plugin') : 'theme'}
+              </span>
+              {extension.author && (
+                <span className="text-xs text-muted-foreground truncate">
+                  by {extension.author.displayName}
+                </span>
+              )}
+            </div>
+          </div>
+        </div>
+
+        <p className="text-xs text-muted-foreground mt-3 line-clamp-2">
+          {extension.description}
+        </p>
+
+        {extension.tags && extension.tags.length > 0 && (
+          <div className="flex flex-wrap gap-1 mt-3">
+            {extension.tags.slice(0, 3).map(tag => (
+              <span key={tag} className="text-[10px] px-1.5 py-0.5 rounded bg-muted text-muted-foreground">
+                {tag}
+              </span>
+            ))}
+          </div>
+        )}
+
+        <div className="flex items-center justify-between mt-4 pt-3 border-t border-border">
+          <div className="flex items-center gap-3 text-xs text-muted-foreground">
+            <span className="flex items-center gap-1">
+              <Download className="w-3 h-3" />
+              {extension.totalDownloads.toLocaleString()}
+            </span>
+            {extension.permissions && extension.permissions.length > 0 && (
+              <span title={extension.permissions.join(', ')}>
+                {extension.permissions.length} permission{extension.permissions.length !== 1 ? 's' : ''}
+              </span>
+            )}
+          </div>
+          <span className="inline-flex items-center gap-1 text-xs text-muted-foreground group-hover:text-foreground">
+            <Eye className="w-3 h-3" />
+            Preview
+          </span>
+        </div>
+      </Link>
+
+      <div className="px-4 pb-4 -mt-1 flex items-center gap-2 flex-wrap">
+        {extension.installed && updateAvailable ? (
+          <button
+            onClick={(e) => { e.preventDefault(); e.stopPropagation(); onInstall(); }}
+            disabled={installing}
+            title={`Update from v${extension.installedVersion} to v${extension.latestVersion}`}
+            className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-blue-600 text-white text-xs font-medium hover:bg-blue-700 disabled:opacity-50 transition-colors"
+          >
+            {installing ? (
+              <Loader2 className="w-3 h-3 animate-spin" />
+            ) : (
+              <ArrowUpCircle className="w-3 h-3" />
+            )}
+            Update to v{extension.latestVersion}
+          </button>
+        ) : extension.installed ? (
+          <span
+            className="inline-flex items-center gap-1 h-7 px-2.5 rounded-md bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 text-xs font-medium"
+            title={extension.installedVersion ? `Installed: v${extension.installedVersion}` : undefined}
+          >
+            <Check className="w-3 h-3" />
+            Installed
+          </span>
+        ) : versionMismatch ? (
+          <span
+            className="inline-flex items-center gap-1 h-7 px-2.5 rounded-md bg-amber-100 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300 text-xs font-medium"
+            title={`Requires app v${extension.minAppVersion}+. You are running v${CURRENT_APP_VERSION}.`}
+          >
+            <AlertTriangle className="w-3 h-3" />
+            Requires v{extension.minAppVersion}+
+          </span>
+        ) : (
+          <button
+            onClick={(e) => { e.preventDefault(); e.stopPropagation(); onInstall(); }}
+            disabled={installing}
+            className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-primary text-primary-foreground text-xs font-medium hover:bg-primary/90 disabled:opacity-50 transition-colors"
+          >
+            {installing ? (
+              <Loader2 className="w-3 h-3 animate-spin" />
+            ) : (
+              <Download className="w-3 h-3" />
+            )}
+            Quick install
+          </button>
+        )}
+      </div>
+    </div>
+  );
+}

app/(main)/admin/_tabs/plugin-config-panel.tsx

@@ -0,0 +1,314 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { Puzzle, ArrowLeft, Loader2, Eye, EyeOff } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+import { usePluginSlotOffers } from '@/hooks/use-plugin-slot-offers';
+import { PluginIframeSlot } from '@/components/plugins/plugin-iframe-slot';
+
+interface ConfigField {
+  type: 'string' | 'secret' | 'boolean' | 'number' | 'select';
+  label: string;
+  description?: string;
+  required?: boolean;
+  default?: unknown;
+  placeholder?: string;
+  options?: { label: string; value: string }[];
+}
+
+interface PluginConfig {
+  [key: string]: unknown;
+}
+
+interface PluginInfo {
+  id: string;
+  name: string;
+  description: string;
+  version: string;
+  author: string;
+  type: string;
+  permissions: string[];
+  enabled: boolean;
+  configSchema?: Record<string, ConfigField>;
+}
+
+interface Props {
+  pluginId: string;
+  onBack: () => void;
+}
+
+export function PluginConfigPanel({ pluginId, onBack }: Props) {
+  const [plugin, setPlugin] = useState<PluginInfo | null>(null);
+  const [config, setConfig] = useState<PluginConfig>({});
+  const [formValues, setFormValues] = useState<Record<string, string>>({});
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [revealSecrets, setRevealSecrets] = useState<Record<string, boolean>>({});
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+
+  useEffect(() => {
+    let cancelled = false;
+    async function fetchData() {
+      setLoading(true);
+      try {
+        const [pluginsRes, configRes] = await Promise.all([
+          apiFetch('/api/admin/plugins'),
+          apiFetch(`/api/admin/plugins/${encodeURIComponent(pluginId)}/config`),
+        ]);
+        if (cancelled) return;
+
+        if (pluginsRes.ok) {
+          const plugins: PluginInfo[] = await pluginsRes.json();
+          setPlugin(plugins.find(p => p.id === pluginId) || null);
+        }
+
+        if (configRes.ok) {
+          setConfig(await configRes.json());
+        }
+      } finally {
+        if (!cancelled) setLoading(false);
+      }
+    }
+    fetchData();
+    return () => { cancelled = true; };
+  }, [pluginId]);
+
+  useEffect(() => {
+    if (!plugin?.configSchema) return;
+    const initial: Record<string, string> = {};
+    for (const [key, field] of Object.entries(plugin.configSchema)) {
+      const stored = config[key];
+      if (stored !== undefined && stored !== null) {
+        initial[key] = String(stored);
+      } else if (field.default !== undefined) {
+        initial[key] = String(field.default);
+      } else {
+        initial[key] = '';
+      }
+    }
+    setFormValues(initial);
+  }, [plugin, config]);
+
+  async function handleSaveAll() {
+    if (!plugin?.configSchema) return;
+    setSaving(true);
+    setMessage(null);
+
+    for (const [key, field] of Object.entries(plugin.configSchema)) {
+      if (field.required && !formValues[key]?.trim()) {
+        setMessage({ type: 'error', text: `"${field.label}" is required` });
+        setSaving(false);
+        return;
+      }
+    }
+
+    try {
+      let hasError = false;
+      for (const [key, field] of Object.entries(plugin.configSchema)) {
+        const newVal = formValues[key] ?? '';
+        const oldVal = config[key] !== undefined ? String(config[key]) : '';
+
+        if (newVal === oldVal) continue;
+        if (field.type === 'secret' && !newVal && config[key]) continue;
+
+        let value: unknown = newVal;
+        if (field.type === 'boolean') value = newVal === 'true';
+        else if (field.type === 'number') value = Number(newVal);
+
+        if (!newVal && !field.required) {
+          const res = await apiFetch(`/api/admin/plugins/${encodeURIComponent(pluginId)}/config`, {
+            method: 'DELETE',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ key }),
+          });
+          if (res.ok) {
+            setConfig(prev => { const next = { ...prev }; delete next[key]; return next; });
+          } else {
+            hasError = true;
+          }
+          continue;
+        }
+
+        const res = await apiFetch(`/api/admin/plugins/${encodeURIComponent(pluginId)}/config`, {
+          method: 'PUT',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ key, value }),
+        });
+        if (res.ok) {
+          setConfig(prev => ({ ...prev, [key]: value }));
+        } else {
+          hasError = true;
+        }
+      }
+
+      setMessage(hasError
+        ? { type: 'error', text: 'Some settings failed to save' }
+        : { type: 'success', text: 'Configuration saved' }
+      );
+    } catch {
+      setMessage({ type: 'error', text: 'Failed to save configuration' });
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  if (loading) {
+    return (
+      <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">
+        <Loader2 className="w-4 h-4 animate-spin mr-2" />
+        Loading...
+      </div>
+    );
+  }
+
+  if (!plugin) {
+    return (
+      <div className="space-y-4">
+        <button
+          type="button"
+          onClick={onBack}
+          className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+        >
+          <ArrowLeft className="w-4 h-4" /> Back to Plugins
+        </button>
+        <p className="text-sm text-destructive">Plugin not found: {pluginId}</p>
+      </div>
+    );
+  }
+
+  const schema = plugin.configSchema;
+  const hasSchema = schema && Object.keys(schema).length > 0;
+
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center gap-3">
+        <button
+          type="button"
+          onClick={onBack}
+          className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+          aria-label="Back to Plugins"
+        >
+          <ArrowLeft className="w-4 h-4" />
+        </button>
+        <div>
+          <h1 className="text-2xl font-semibold text-foreground flex items-center gap-2">
+            <Puzzle className="w-5 h-5" />
+            {plugin.name} Configuration
+          </h1>
+          <p className="text-sm text-muted-foreground mt-0.5">
+            v{plugin.version} by {plugin.author}
+          </p>
+        </div>
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      {hasSchema ? (
+        <div className="border border-border rounded-lg">
+          <div className="px-4 py-3 border-b border-border bg-muted/30">
+            <h2 className="text-sm font-medium text-foreground">Settings</h2>
+          </div>
+          <div className="p-4 space-y-5">
+            {Object.entries(schema).map(([key, field]) => (
+              <div key={key}>
+                <label className="text-sm font-medium text-foreground block mb-1">
+                  {field.label}
+                  {field.required && <span className="text-destructive ml-0.5">*</span>}
+                </label>
+                {field.description && (
+                  <p className="text-xs text-muted-foreground mb-1.5">{field.description}</p>
+                )}
+
+                {field.type === 'boolean' ? (
+                  <select
+                    value={formValues[key] ?? String(field.default ?? 'false')}
+                    onChange={(e) => setFormValues(prev => ({ ...prev, [key]: e.target.value }))}
+                    className="w-full h-9 px-3 rounded-md border border-input bg-background text-sm focus:outline-none focus:ring-2 focus:ring-ring"
+                  >
+                    <option value="true">Enabled</option>
+                    <option value="false">Disabled</option>
+                  </select>
+                ) : field.type === 'select' && field.options ? (
+                  <select
+                    value={formValues[key] ?? ''}
+                    onChange={(e) => setFormValues(prev => ({ ...prev, [key]: e.target.value }))}
+                    className="w-full h-9 px-3 rounded-md border border-input bg-background text-sm focus:outline-none focus:ring-2 focus:ring-ring"
+                  >
+                    <option value="">- Select -</option>
+                    {field.options.map(opt => (
+                      <option key={opt.value} value={opt.value}>{opt.label}</option>
+                    ))}
+                  </select>
+                ) : field.type === 'secret' ? (
+                  <div className="relative">
+                    <input
+                      type={revealSecrets[key] ? 'text' : 'password'}
+                      value={formValues[key] ?? ''}
+                      onChange={(e) => setFormValues(prev => ({ ...prev, [key]: e.target.value }))}
+                      placeholder={config[key] ? '••••••••  (unchanged)' : (field.placeholder || '')}
+                      className="w-full h-9 px-3 pr-10 rounded-md border border-input bg-background text-sm focus:outline-none focus:ring-2 focus:ring-ring font-mono"
+                    />
+                    <button
+                      type="button"
+                      onClick={() => setRevealSecrets(prev => ({ ...prev, [key]: !prev[key] }))}
+                      className="absolute right-2 top-1/2 -translate-y-1/2 p-1 text-muted-foreground hover:text-foreground"
+                      aria-label={revealSecrets[key] ? 'Hide' : 'Show'}
+                    >
+                      {revealSecrets[key] ? <EyeOff className="w-4 h-4" /> : <Eye className="w-4 h-4" />}
+                    </button>
+                  </div>
+                ) : (
+                  <input
+                    type={field.type === 'number' ? 'number' : 'text'}
+                    value={formValues[key] ?? ''}
+                    onChange={(e) => setFormValues(prev => ({ ...prev, [key]: e.target.value }))}
+                    placeholder={field.placeholder || ''}
+                    className="w-full h-9 px-3 rounded-md border border-input bg-background text-sm focus:outline-none focus:ring-2 focus:ring-ring"
+                  />
+                )}
+              </div>
+            ))}
+
+            <button
+              onClick={handleSaveAll}
+              disabled={saving}
+              className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+            >
+              {saving ? <Loader2 className="w-4 h-4 animate-spin" /> : null}
+              Save Configuration
+            </button>
+          </div>
+        </div>
+      ) : (
+        <div className="border border-border rounded-lg p-8 text-center">
+          <p className="text-sm text-muted-foreground">This plugin does not declare any configuration settings.</p>
+        </div>
+      )}
+
+      <PluginAdminSection pluginId={pluginId} />
+    </div>
+  );
+}
+
+/**
+ * Renders the plugin's own `admin-plugin-page` slot, if the plugin offers
+ * one. Sandboxed plugins ship a React component under `slots['admin-plugin-page']`
+ * and the host gives it a dedicated iframe inside the admin panel.
+ */
+function PluginAdminSection({ pluginId }: { pluginId: string }) {
+  const offers = usePluginSlotOffers('admin-plugin-page');
+  const offer = offers.find((o) => o.pluginId === pluginId);
+  if (!offer) return null;
+  return (
+    <div className="border border-border rounded-lg overflow-hidden">
+      <div className="bg-muted/40 px-4 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider">
+        Plugin admin panel
+      </div>
+      <PluginIframeSlot pluginId={pluginId} slot="admin-plugin-page" />
+    </div>
+  );
+}

app/(main)/admin/_tabs/plugins.tsx

@@ -0,0 +1,459 @@
+'use client';
+
+import { useEffect, useState, useRef } from 'react';
+import { Upload, Trash2, Power, PowerOff, AlertTriangle, Loader2, Package, Save, Shield, Lock, LockOpen, Settings } from 'lucide-react';
+import type { SettingsPolicy } from '@/lib/admin/types';
+import { DEFAULT_POLICY } from '@/lib/admin/types';
+import { apiFetch } from '@/lib/browser-navigation';
+import { PluginConfigPanel } from './plugin-config-panel';
+
+interface PluginEntry {
+  id: string;
+  name: string;
+  version: string;
+  author: string;
+  description: string;
+  type: string;
+  enabled: boolean;
+  forceEnabled?: boolean;
+  permissions: string[];
+  installedAt: string;
+  updatedAt: string;
+}
+
+export function PluginsTab() {
+  const [plugins, setPlugins] = useState<PluginEntry[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [uploading, setUploading] = useState(false);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  const [policy, setPolicy] = useState<SettingsPolicy>({ ...DEFAULT_POLICY });
+  const [policyDirty, setPolicyDirty] = useState(false);
+  const [savingPolicy, setSavingPolicy] = useState(false);
+  const [configuringId, setConfiguringId] = useState<string | null>(null);
+
+  useEffect(() => { fetchPlugins(); fetchPolicy(); }, []);
+
+  async function fetchPolicy() {
+    try {
+      const res = await apiFetch('/api/admin/policy');
+      if (res.ok) {
+        const data = await res.json();
+        setPolicy(data);
+      }
+    } catch { /* ignore */ }
+  }
+
+  function togglePluginsEnabled() {
+    setPolicy(prev => ({
+      ...prev,
+      features: { ...prev.features, pluginsEnabled: !prev.features.pluginsEnabled },
+    }));
+    setPolicyDirty(true);
+    setMessage(null);
+  }
+
+  function togglePluginsUploadEnabled() {
+    setPolicy(prev => ({
+      ...prev,
+      features: { ...prev.features, pluginsUploadEnabled: !prev.features.pluginsUploadEnabled },
+    }));
+    setPolicyDirty(true);
+    setMessage(null);
+  }
+
+  function toggleRequirePluginApproval() {
+    setPolicy(prev => ({
+      ...prev,
+      features: { ...prev.features, requirePluginApproval: !prev.features.requirePluginApproval },
+    }));
+    setPolicyDirty(true);
+    setMessage(null);
+  }
+
+  async function handleSavePolicy() {
+    setSavingPolicy(true);
+    setMessage(null);
+    try {
+      const res = await apiFetch('/api/admin/policy', {
+        method: 'PUT',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(policy),
+      });
+      if (res.ok) {
+        setMessage({ type: 'success', text: 'Plugin policy saved. Users will see changes on next login.' });
+        setPolicyDirty(false);
+      } else {
+        const data = await res.json();
+        setMessage({ type: 'error', text: data.error || 'Failed to save policy' });
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Failed to save policy' });
+    } finally {
+      setSavingPolicy(false);
+    }
+  }
+
+  async function fetchPlugins() {
+    setLoading(true);
+    try {
+      const res = await apiFetch('/api/admin/plugins');
+      if (res.ok) setPlugins(await res.json());
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleUpload(e: React.ChangeEvent<HTMLInputElement>) {
+    const file = e.target.files?.[0];
+    if (!file) return;
+
+    setUploading(true);
+    setMessage(null);
+
+    const formData = new FormData();
+    formData.append('file', file);
+
+    try {
+      const res = await apiFetch('/api/admin/plugins', {
+        method: 'POST',
+        body: formData,
+      });
+
+      const data = await res.json();
+      if (res.ok) {
+        const warnings = data.warnings?.length ? ` (${data.warnings.length} warning(s))` : '';
+        setMessage({ type: 'success', text: `Plugin "${data.plugin.name}" installed${warnings}` });
+        await fetchPlugins();
+      } else {
+        setMessage({ type: 'error', text: data.error || 'Upload failed' });
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Upload failed' });
+    } finally {
+      setUploading(false);
+      if (fileInputRef.current) fileInputRef.current.value = '';
+    }
+  }
+
+  async function togglePlugin(id: string, enabled: boolean) {
+    setMessage(null);
+    const res = await apiFetch('/api/admin/plugins', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ id, enabled }),
+    });
+
+    if (res.ok) {
+      setPlugins(prev => prev.map(p => p.id === id ? { ...p, enabled } : p));
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Update failed' });
+    }
+  }
+
+  async function toggleForceEnabled(id: string, forceEnabled: boolean) {
+    setMessage(null);
+    const body: Record<string, unknown> = { id, forceEnabled };
+    if (forceEnabled) body.enabled = true;
+
+    const res = await apiFetch('/api/admin/plugins', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body),
+    });
+
+    if (res.ok) {
+      setPlugins(prev => prev.map(p => p.id === id ? { ...p, forceEnabled, ...(forceEnabled ? { enabled: true } : {}) } : p));
+      setPolicy(prev => {
+        const current = prev.forceEnabledPlugins || [];
+        return {
+          ...prev,
+          forceEnabledPlugins: forceEnabled
+            ? [...current.filter(pid => pid !== id), id]
+            : current.filter(pid => pid !== id),
+        };
+      });
+      setPolicyDirty(true);
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Update failed' });
+    }
+  }
+
+  async function forceEnableAll() {
+    setMessage(null);
+    const disabled = plugins.filter(p => !p.enabled);
+    if (disabled.length === 0) {
+      setMessage({ type: 'success', text: 'All plugins are already enabled' });
+      return;
+    }
+    let failed = 0;
+    for (const p of disabled) {
+      const res = await apiFetch('/api/admin/plugins', {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ id: p.id, enabled: true }),
+      });
+      if (!res.ok) failed++;
+    }
+    setPlugins(prev => prev.map(p => failed === 0 ? { ...p, enabled: true } : p));
+    if (failed === 0) {
+      await fetchPlugins();
+      setMessage({ type: 'success', text: `All ${disabled.length} plugin(s) enabled` });
+    } else {
+      await fetchPlugins();
+      setMessage({ type: 'error', text: `${failed} plugin(s) failed to enable` });
+    }
+  }
+
+  async function forceDisableAll() {
+    setMessage(null);
+    const enabled = plugins.filter(p => p.enabled);
+    if (enabled.length === 0) {
+      setMessage({ type: 'success', text: 'All plugins are already disabled' });
+      return;
+    }
+    let failed = 0;
+    for (const p of enabled) {
+      const res = await apiFetch('/api/admin/plugins', {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ id: p.id, enabled: false }),
+      });
+      if (!res.ok) failed++;
+    }
+    if (failed === 0) {
+      await fetchPlugins();
+      setMessage({ type: 'success', text: `All ${enabled.length} plugin(s) disabled` });
+    } else {
+      await fetchPlugins();
+      setMessage({ type: 'error', text: `${failed} plugin(s) failed to disable` });
+    }
+  }
+
+  async function deletePlugin(id: string, name: string) {
+    if (!confirm(`Remove plugin "${name}"? This cannot be undone.`)) return;
+
+    setMessage(null);
+    const res = await apiFetch('/api/admin/plugins', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ id }),
+    });
+
+    if (res.ok) {
+      setPlugins(prev => prev.filter(p => p.id !== id));
+      setMessage({ type: 'success', text: `Plugin "${name}" removed` });
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Delete failed' });
+    }
+  }
+
+  if (configuringId) {
+    return <PluginConfigPanel pluginId={configuringId} onBack={() => { setConfiguringId(null); fetchPlugins(); }} />;
+  }
+
+  if (loading) {
+    return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
+  }
+
+  const pluginsEnabled = policy.features.pluginsEnabled ?? true;
+  const pluginsUploadEnabled = policy.features.pluginsUploadEnabled ?? true;
+  const requirePluginApproval = policy.features.requirePluginApproval ?? true;
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Plugins</h1>
+          <p className="text-sm text-muted-foreground mt-1">Manage plugins and plugin policy for all users</p>
+        </div>
+        <div className="flex flex-wrap items-center gap-2">
+          {policyDirty && (
+            <button
+              onClick={handleSavePolicy}
+              disabled={savingPolicy}
+              className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+            >
+              {savingPolicy ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
+              Save Policy
+            </button>
+          )}
+          <label className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 cursor-pointer transition-all shadow-sm">
+            {uploading ? <Loader2 className="w-4 h-4 animate-spin" /> : <Upload className="w-4 h-4" />}
+            Upload Plugin
+            <input
+              ref={fileInputRef}
+              type="file"
+              accept=".zip"
+              onChange={handleUpload}
+              disabled={uploading}
+              className="sr-only"
+            />
+          </label>
+        </div>
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <div className="flex items-center gap-2">
+            <Shield className="w-4 h-4 text-muted-foreground" />
+            <h2 className="text-sm font-medium text-foreground">Plugin Policy</h2>
+          </div>
+          <p className="text-xs text-muted-foreground mt-0.5">Control plugin availability for users</p>
+        </div>
+        <div className="divide-y divide-border">
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+            <div>
+              <span className="text-sm text-foreground">Plugins Enabled</span>
+              <p className="text-xs text-muted-foreground mt-0.5">Allow the plugin system to load and run plugins for users</p>
+            </div>
+            <button onClick={togglePluginsEnabled}
+              className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${pluginsEnabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+              <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${pluginsEnabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+            </button>
+          </div>
+
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+            <div>
+              <span className="text-sm text-foreground">User Plugin Uploads</span>
+              <p className="text-xs text-muted-foreground mt-0.5">Allow users to upload plugin ZIP files in Settings</p>
+            </div>
+            <button onClick={togglePluginsUploadEnabled}
+              className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${pluginsUploadEnabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+              <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${pluginsUploadEnabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+            </button>
+          </div>
+
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+            <div>
+              <span className="text-sm text-foreground">Require Admin Approval</span>
+              <p className="text-xs text-muted-foreground mt-0.5">User-uploaded plugins must be approved by an admin before they can be enabled</p>
+            </div>
+            <button onClick={toggleRequirePluginApproval}
+              className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${requirePluginApproval ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+              <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${requirePluginApproval ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+            </button>
+          </div>
+
+          {plugins.length > 0 && (
+            <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div>
+                <span className="text-sm text-foreground">Force Enable / Disable All</span>
+                <p className="text-xs text-muted-foreground mt-0.5">Bulk toggle all deployed plugins at once</p>
+              </div>
+              <div className="flex items-center gap-2">
+                <button
+                  onClick={forceEnableAll}
+                  className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-emerald-600 text-white text-xs font-medium hover:bg-emerald-700 transition-colors"
+                >
+                  <Power className="w-3.5 h-3.5" />
+                  Enable All
+                </button>
+                <button
+                  onClick={forceDisableAll}
+                  className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-muted text-muted-foreground text-xs font-medium hover:bg-accent hover:text-foreground transition-colors"
+                >
+                  <PowerOff className="w-3.5 h-3.5" />
+                  Disable All
+                </button>
+              </div>
+            </div>
+          )}
+        </div>
+      </div>
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <div className="flex items-center gap-2">
+            <Package className="w-4 h-4 text-muted-foreground" />
+            <h2 className="text-sm font-medium text-foreground">Deployed Plugins</h2>
+          </div>
+          <p className="text-xs text-muted-foreground mt-0.5">Admin-uploaded plugins for all users</p>
+        </div>
+        {plugins.length === 0 ? (
+          <div className="p-12 text-center">
+            <Package className="w-10 h-10 text-muted-foreground/40 mx-auto mb-3" />
+            <p className="text-sm text-muted-foreground">No plugins installed</p>
+            <p className="text-xs text-muted-foreground mt-1">Upload a plugin ZIP file to get started</p>
+          </div>
+        ) : (
+          <div className="divide-y divide-border">
+            {plugins.map(plugin => (
+              <div key={plugin.id} className="px-4 py-4 flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="min-w-0 flex-1">
+                  <div className="flex flex-wrap items-center gap-x-2 gap-y-1">
+                    <span className="text-sm font-medium text-foreground">{plugin.name}</span>
+                    <span className="text-xs text-muted-foreground">v{plugin.version}</span>
+                    <span className={`text-xs px-1.5 py-0.5 rounded ${plugin.enabled ? 'bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400' : 'bg-muted text-muted-foreground'}`}>
+                      {plugin.enabled ? 'Enabled' : 'Disabled'}
+                    </span>
+                    {plugin.forceEnabled && (
+                      <span className="text-xs px-1.5 py-0.5 rounded bg-amber-100 text-amber-700 dark:bg-amber-950/30 dark:text-amber-400 flex items-center gap-1">
+                        <Lock className="w-3 h-3" /> Forced
+                      </span>
+                    )}
+                  </div>
+                {plugin.description && (
+                  <p className="text-xs text-muted-foreground mt-0.5 truncate">{plugin.description}</p>
+                )}
+                <div className="text-xs text-muted-foreground mt-1">
+                  by {plugin.author} &middot; {plugin.type} &middot; installed {new Date(plugin.installedAt).toLocaleDateString()}
+                </div>
+                {plugin.permissions.length > 0 && (
+                  <div className="flex items-center gap-1 mt-1">
+                    <AlertTriangle className="w-3 h-3 text-warning" />
+                    <span className="text-xs text-warning">
+                      Permissions: {plugin.permissions.join(', ')}
+                    </span>
+                  </div>
+                )}
+              </div>
+
+              <div className="flex items-center gap-2">
+                <button
+                  type="button"
+                  onClick={() => setConfiguringId(plugin.id)}
+                  title="Configure"
+                  className="p-2 rounded-md hover:bg-accent text-muted-foreground hover:text-foreground transition-colors"
+                >
+                  <Settings className="w-4 h-4" />
+                </button>
+                <button
+                  onClick={() => toggleForceEnabled(plugin.id, !plugin.forceEnabled)}
+                  title={plugin.forceEnabled ? 'Remove force-enable (users can disable)' : 'Force enable (users cannot disable)'}
+                  className={`p-2 rounded-md transition-colors ${plugin.forceEnabled ? 'bg-amber-100 text-amber-700 hover:bg-amber-200 dark:bg-amber-950/30 dark:text-amber-400 dark:hover:bg-amber-950/50' : 'hover:bg-accent text-muted-foreground hover:text-foreground'}`}
+                >
+                  {plugin.forceEnabled ? <Lock className="w-4 h-4" /> : <LockOpen className="w-4 h-4" />}
+                </button>
+                <button
+                  onClick={() => togglePlugin(plugin.id, !plugin.enabled)}
+                  title={plugin.enabled ? 'Disable' : 'Enable'}
+                  className="p-2 rounded-md hover:bg-accent text-muted-foreground hover:text-foreground transition-colors"
+                >
+                  <Power className="w-4 h-4" />
+                </button>
+                <button
+                  onClick={() => deletePlugin(plugin.id, plugin.name)}
+                  title="Remove"
+                  className="p-2 rounded-md hover:bg-destructive/10 text-muted-foreground hover:text-destructive transition-colors"
+                >
+                  <Trash2 className="w-4 h-4" />
+                </button>
+              </div>
+            </div>
+          ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

app/(main)/admin/_tabs/policy.tsx

@@ -0,0 +1,217 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { Save, Loader2, Lock } from 'lucide-react';
+import type { SettingsPolicy, FeatureGates } from '@/lib/admin/types';
+import { DEFAULT_FEATURE_GATES, DEFAULT_POLICY } from '@/lib/admin/types';
+import { apiFetch } from '@/lib/browser-navigation';
+
+const EXCLUDED_FEATURE_GATES: (keyof FeatureGates)[] = ['pluginsEnabled', 'pluginsUploadEnabled', 'themesEnabled', 'userThemesEnabled'];
+
+const FEATURE_GATE_LABELS: Partial<Record<keyof FeatureGates, { label: string; description: string }>> = {
+  sidebarAppsEnabled: { label: 'Sidebar Apps', description: 'Allow custom web apps in navigation rail' },
+  settingsExportEnabled: { label: 'Settings Export/Import', description: 'Allow users to export and import settings JSON' },
+  customKeywordsEnabled: { label: 'Custom Keywords', description: 'Allow user-created labels and tags' },
+  templatesEnabled: { label: 'Email Templates', description: 'Allow email template creation and library' },
+  calendarTasksEnabled: { label: 'Calendar Tasks', description: 'Show task panel in calendar view' },
+  contactsEnabled: { label: 'Contacts', description: 'Enable contacts/address book features' },
+  smimeEnabled: { label: 'S/MIME', description: 'Enable certificate management and email signing' },
+  externalContentEnabled: { label: 'External Content', description: 'Allow users to choose external content loading policy' },
+  debugModeEnabled: { label: 'Debug Mode', description: 'Allow users to enable debug/diagnostic mode' },
+  folderIconsEnabled: { label: 'Folder Icons', description: 'Allow custom folder icon picker' },
+  hoverActionsConfigEnabled: { label: 'Hover Actions Config', description: 'Allow users to customize email hover actions' },
+  filesEnabled: { label: 'Files (WebDAV)', description: 'Enable file storage via WebDAV. WARNING: Large uploads can cause Stalwart/RocksDB instability. Not recommended for production.' },
+};
+
+const RESTRICTABLE_SETTINGS = [
+  { key: 'fontSize', label: 'Font Size', category: 'Appearance', type: 'enum', allowedValues: ['small', 'medium', 'large'] },
+  { key: 'density', label: 'Density', category: 'Appearance', type: 'enum', allowedValues: ['compact', 'regular', 'spacious'] },
+  { key: 'animationsEnabled', label: 'Animations', category: 'Appearance', type: 'boolean' },
+  { key: 'markAsReadDelay', label: 'Mark as Read Delay', category: 'Email', type: 'number' },
+  { key: 'deleteAction', label: 'Delete Action', category: 'Email', type: 'enum', allowedValues: ['trash', 'permanent'] },
+  { key: 'showPreview', label: 'Show Preview', category: 'Email', type: 'boolean' },
+  { key: 'mailLayout', label: 'Mail Layout', category: 'Email', type: 'enum', allowedValues: ['split', 'focus', 'horizontal'] },
+  { key: 'emailsPerPage', label: 'Emails Per Page', category: 'Email', type: 'number' },
+  { key: 'externalContentPolicy', label: 'External Content Policy', category: 'Email', type: 'enum', allowedValues: ['allow', 'block', 'ask'] },
+  { key: 'sendConfirmation', label: 'Send Confirmation', category: 'Composer', type: 'boolean' },
+  { key: 'defaultReplyMode', label: 'Default Reply Mode', category: 'Composer', type: 'enum', allowedValues: ['reply', 'reply-all'] },
+  { key: 'autoSelectReplyIdentity', label: 'Auto-select Reply Identity', category: 'Composer', type: 'boolean' },
+  { key: 'plainTextMode', label: 'Plain Text Only', category: 'Composer', type: 'boolean' },
+  { key: 'sessionTimeout', label: 'Session Timeout', category: 'Privacy', type: 'number' },
+  { key: 'emailNotificationsEnabled', label: 'Email Notifications', category: 'Notifications', type: 'boolean' },
+  { key: 'calendarNotificationsEnabled', label: 'Calendar Notifications', category: 'Notifications', type: 'boolean' },
+  { key: 'debugMode', label: 'Debug Mode', category: 'Advanced', type: 'boolean' },
+];
+
+export function PolicyTab() {
+  const [policy, setPolicy] = useState<SettingsPolicy>({ ...DEFAULT_POLICY });
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const [dirty, setDirty] = useState(false);
+
+  useEffect(() => { fetchPolicy(); }, []);
+
+  async function fetchPolicy() {
+    setLoading(true);
+    try {
+      const res = await apiFetch('/api/admin/policy');
+      if (res.ok) {
+        const data = await res.json();
+        setPolicy(data);
+      }
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  function toggleFeature(key: keyof FeatureGates) {
+    setPolicy(prev => ({
+      ...prev,
+      features: { ...prev.features, [key]: !prev.features[key] },
+    }));
+    setDirty(true);
+    setMessage(null);
+  }
+
+  function toggleLocked(settingKey: string) {
+    setPolicy(prev => {
+      const existing = prev.restrictions[settingKey] || {};
+      const newRestrictions = { ...prev.restrictions };
+      if (existing.locked) {
+        delete newRestrictions[settingKey];
+      } else {
+        newRestrictions[settingKey] = { ...existing, locked: true };
+      }
+      return { ...prev, restrictions: newRestrictions };
+    });
+    setDirty(true);
+    setMessage(null);
+  }
+
+  function toggleHidden(settingKey: string) {
+    setPolicy(prev => {
+      const existing = prev.restrictions[settingKey] || {};
+      const newRestrictions = { ...prev.restrictions };
+      newRestrictions[settingKey] = { ...existing, hidden: !existing.hidden };
+      if (!newRestrictions[settingKey].hidden && !newRestrictions[settingKey].locked) {
+        delete newRestrictions[settingKey];
+      }
+      return { ...prev, restrictions: newRestrictions };
+    });
+    setDirty(true);
+    setMessage(null);
+  }
+
+  async function handleSave() {
+    setSaving(true);
+    setMessage(null);
+
+    const res = await apiFetch('/api/admin/policy', {
+      method: 'PUT',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(policy),
+    });
+
+    if (res.ok) {
+      setMessage({ type: 'success', text: 'Policy saved. Users will see changes on next login.' });
+      setDirty(false);
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Failed to save' });
+    }
+    setSaving(false);
+  }
+
+  if (loading) {
+    return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
+  }
+
+  const categories = [...new Set(RESTRICTABLE_SETTINGS.map(s => s.category))];
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">User Policy</h1>
+          <p className="text-sm text-muted-foreground mt-1">Control which features and settings users can access</p>
+        </div>
+        {dirty && (
+          <button
+            onClick={handleSave}
+            disabled={saving}
+            className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+          >
+            {saving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
+            Save policy
+          </button>
+        )}
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Feature Gates</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Toggle entire features on or off for all users. Plugin and theme gates are on their respective admin pages.</p>
+        </div>
+        <div className="divide-y divide-border">
+          {(Object.keys(DEFAULT_FEATURE_GATES) as (keyof FeatureGates)[])
+            .filter(key => !EXCLUDED_FEATURE_GATES.includes(key))
+            .map(key => {
+            const meta = FEATURE_GATE_LABELS[key];
+            if (!meta) return null;
+            const { label, description } = meta;
+            const enabled = policy.features[key];
+            return (
+              <div key={key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="min-w-0">
+                  <span className="text-sm text-foreground">{label}</span>
+                  <p className="text-xs text-muted-foreground mt-0.5">{description}</p>
+                </div>
+                <button onClick={() => toggleFeature(key)}
+                  className={`shrink-0 relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${enabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+                  <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${enabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+                </button>
+              </div>
+            );
+          })}
+        </div>
+      </div>
+
+      {categories.map(category => (
+        <div key={category} className="border border-border rounded-lg">
+          <div className="px-4 py-3 border-b border-border bg-muted/30">
+            <h2 className="text-sm font-medium text-foreground">{category}</h2>
+          </div>
+          <div className="divide-y divide-border">
+            {RESTRICTABLE_SETTINGS.filter(s => s.category === category).map(setting => {
+              const restriction = policy.restrictions[setting.key] || {};
+              return (
+                <div key={setting.key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                  <span className="text-sm text-foreground">{setting.label}</span>
+                  <div className="flex items-center gap-3 shrink-0">
+                    <label className="flex items-center gap-1.5 text-xs text-muted-foreground cursor-pointer">
+                      <input type="checkbox" checked={!!restriction.locked} onChange={() => toggleLocked(setting.key)}
+                        className="rounded border-input" />
+                      <Lock className="w-3 h-3" /> Lock
+                    </label>
+                    <label className="flex items-center gap-1.5 text-xs text-muted-foreground cursor-pointer">
+                      <input type="checkbox" checked={!!restriction.hidden} onChange={() => toggleHidden(setting.key)}
+                        className="rounded border-input" />
+                      Hide
+                    </label>
+                  </div>
+                </div>
+              );
+            })}
+          </div>
+        </div>
+      ))}
+    </div>
+  );
+}

app/(main)/admin/_tabs/settings.tsx

@@ -0,0 +1,273 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { Save, RotateCcw, Loader2 } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+import { JmapServersSection } from './_jmap-servers-section';
+import type { JmapServerEntry } from '@/lib/admin/jmap-servers';
+
+interface ConfigEntry {
+  value?: unknown;
+  source: 'admin' | 'env' | 'default';
+  hasValue?: boolean;
+}
+
+export function SettingsTab() {
+  const [config, setConfig] = useState<Record<string, ConfigEntry>>({});
+  const [edits, setEdits] = useState<Record<string, unknown>>({});
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+
+  useEffect(() => {
+    fetchConfig();
+  }, []);
+
+  async function fetchConfig() {
+    setLoading(true);
+    const res = await apiFetch('/api/admin/config');
+    if (res.ok) {
+      setConfig(await res.json());
+    }
+    setLoading(false);
+  }
+
+  function handleChange(key: string, value: unknown) {
+    setEdits(prev => ({ ...prev, [key]: value }));
+    setMessage(null);
+  }
+
+  function currentValue(key: string): unknown {
+    if (key in edits) return edits[key];
+    return config[key]?.value;
+  }
+
+  async function handleSave() {
+    if (Object.keys(edits).length === 0) return;
+    setSaving(true);
+    setMessage(null);
+
+    const res = await apiFetch('/api/admin/config', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(edits),
+    });
+
+    if (res.ok) {
+      setMessage({ type: 'success', text: 'Settings saved. Changes take effect on next page load.' });
+      setEdits({});
+      await fetchConfig();
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Failed to save' });
+    }
+    setSaving(false);
+  }
+
+  async function handleRevert(key: string) {
+    const res = await apiFetch('/api/admin/config', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ key }),
+    });
+    if (res.ok) {
+      setEdits(prev => {
+        const next = { ...prev };
+        delete next[key];
+        return next;
+      });
+      await fetchConfig();
+      setMessage({ type: 'success', text: `${key} reverted to default` });
+    }
+  }
+
+  const hasEdits = Object.keys(edits).length > 0;
+
+  if (loading) {
+    return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
+  }
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Server Settings</h1>
+          <p className="text-sm text-muted-foreground mt-1">General server configuration</p>
+        </div>
+        {hasEdits && (
+          <button
+            onClick={handleSave}
+            disabled={saving}
+            className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+          >
+            {saving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
+            Save changes
+          </button>
+        )}
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      <SettingsSection title="General">
+        <TextSetting label="Application Name" configKey="appName" value={currentValue('appName') as string} source={config.appName?.source} onChange={handleChange} onRevert={handleRevert} />
+        <TextSetting label="JMAP Server URL" configKey="jmapServerUrl" value={currentValue('jmapServerUrl') as string} source={config.jmapServerUrl?.source} onChange={handleChange} onRevert={handleRevert} placeholder="https://mail.example.com" />
+        <ToggleSetting label="Allow Custom JMAP Endpoint" description="Show a JMAP server URL field on the login form, allowing users to connect to any JMAP server" configKey="allowCustomJmapEndpoint" value={currentValue('allowCustomJmapEndpoint') as boolean} source={config.allowCustomJmapEndpoint?.source} onChange={handleChange} onRevert={handleRevert} />
+        {!!currentValue('allowCustomJmapEndpoint') && (
+          <div className="px-4 py-2.5 bg-amber-50 dark:bg-amber-950/30 border-l-2 border-amber-400 dark:border-amber-600">
+            <p className="text-xs text-amber-800 dark:text-amber-300 leading-relaxed">
+              <strong>CORS warning:</strong> External JMAP servers must include this domain in their CORS <code className="text-[11px] bg-amber-100 dark:bg-amber-900/50 px-1 py-0.5 rounded">Access-Control-Allow-Origin</code> header, or requests from the browser will be blocked.
+            </p>
+          </div>
+        )}
+        <ToggleSetting label="Stalwart Features" description="Enable Stalwart Mail Server-specific features" configKey="stalwartFeaturesEnabled" value={currentValue('stalwartFeaturesEnabled') as boolean} source={config.stalwartFeaturesEnabled?.source} onChange={handleChange} onRevert={handleRevert} />
+        <ToggleSetting label="Demo Mode" description="Enable demo mode with sample data" configKey="demoMode" value={currentValue('demoMode') as boolean} source={config.demoMode?.source} onChange={handleChange} onRevert={handleRevert} />
+      </SettingsSection>
+
+      <SettingsSection title="JMAP Servers (multi-server)">
+        <ToggleSetting
+          label="Auto-pick server by email domain"
+          description="When users type their email, automatically select the matching server from the list below."
+          configKey="jmapServerAutoPickByDomain"
+          value={currentValue('jmapServerAutoPickByDomain') as boolean}
+          source={config.jmapServerAutoPickByDomain?.source}
+          onChange={handleChange}
+          onRevert={handleRevert}
+        />
+        <JmapServersSection
+          value={(currentValue('jmapServers') as JmapServerEntry[]) ?? []}
+          source={config.jmapServers?.source}
+          onChange={(next) => handleChange('jmapServers', next)}
+          onRevert={() => handleRevert('jmapServers')}
+        />
+        {Array.isArray(currentValue('jmapServers')) && (currentValue('jmapServers') as JmapServerEntry[]).length > 0 && (
+          <div className="px-4 py-2.5 bg-amber-50 dark:bg-amber-950/30 border-l-2 border-amber-400 dark:border-amber-600">
+            <p className="text-xs text-amber-800 dark:text-amber-300 leading-relaxed">
+              <strong>CORS warning:</strong> Each JMAP server must allow this webmail's origin in its <code className="text-[11px] bg-amber-100 dark:bg-amber-900/50 px-1 py-0.5 rounded">Access-Control-Allow-Origin</code> header, or browser requests will be blocked.
+            </p>
+          </div>
+        )}
+      </SettingsSection>
+
+      <SettingsSection title="Logging">
+        <SelectSetting label="Log Format" configKey="logFormat" value={currentValue('logFormat') as string} source={config.logFormat?.source} options={['text', 'json']} onChange={handleChange} onRevert={handleRevert} />
+        <SelectSetting label="Log Level" configKey="logLevel" value={currentValue('logLevel') as string} source={config.logLevel?.source} options={['error', 'warn', 'info', 'debug']} onChange={handleChange} onRevert={handleRevert} />
+      </SettingsSection>
+
+      <SettingsSection title="Settings Sync">
+        <ToggleSetting label="Settings Sync Enabled" description="Requires SESSION_SECRET to be set" configKey="settingsSyncEnabled" value={currentValue('settingsSyncEnabled') as boolean} source={config.settingsSyncEnabled?.source} onChange={handleChange} onRevert={handleRevert} />
+      </SettingsSection>
+    </div>
+  );
+}
+
+function SettingsSection({ title, children }: { title: string; children: React.ReactNode }) {
+  return (
+    <div className="border border-border rounded-lg">
+      <div className="px-4 py-3 border-b border-border bg-muted/30">
+        <h2 className="text-sm font-medium text-foreground">{title}</h2>
+      </div>
+      <div className="divide-y divide-border">
+        {children}
+      </div>
+    </div>
+  );
+}
+
+function SourceBadge({ source }: { source?: string }) {
+  if (!source || source === 'default') return null;
+  return (
+    <span className={`text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded ${source === 'admin' ? 'bg-primary/10 text-primary' : 'bg-muted text-muted-foreground'}`}>
+      {source}
+    </span>
+  );
+}
+
+function TextSetting({ label, configKey, value, source, onChange, onRevert, placeholder }: {
+  label: string; configKey: string; value: string; source?: string;
+  onChange: (key: string, value: unknown) => void; onRevert: (key: string) => void; placeholder?: string;
+}) {
+  return (
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+      <div className="flex items-center gap-2 min-w-0">
+        <label className="text-sm text-foreground">{label}</label>
+        <SourceBadge source={source} />
+      </div>
+      <div className="flex items-center gap-2 w-full sm:w-auto">
+        <input
+          type="text"
+          value={value ?? ''}
+          onChange={(e) => onChange(configKey, e.target.value)}
+          placeholder={placeholder}
+          className="h-8 w-full sm:w-64 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+        />
+        {source === 'admin' && (
+          <button onClick={() => onRevert(configKey)} className="shrink-0 text-muted-foreground hover:text-foreground" title="Revert to default">
+            <RotateCcw className="w-3.5 h-3.5" />
+          </button>
+        )}
+      </div>
+    </div>
+  );
+}
+
+function ToggleSetting({ label, description, configKey, value, source, onChange, onRevert }: {
+  label: string; description?: string; configKey: string; value: boolean; source?: string;
+  onChange: (key: string, value: unknown) => void; onRevert: (key: string) => void;
+}) {
+  return (
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+      <div className="min-w-0">
+        <div className="flex items-center gap-2">
+          <span className="text-sm text-foreground">{label}</span>
+          <SourceBadge source={source} />
+        </div>
+        {description && <p className="text-xs text-muted-foreground mt-0.5">{description}</p>}
+      </div>
+      <div className="flex items-center gap-2 shrink-0">
+        <button
+          onClick={() => onChange(configKey, !value)}
+          className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${value ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}
+        >
+          <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${value ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+        </button>
+        {source === 'admin' && (
+          <button onClick={() => onRevert(configKey)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+            <RotateCcw className="w-3.5 h-3.5" />
+          </button>
+        )}
+      </div>
+    </div>
+  );
+}
+
+function SelectSetting({ label, configKey, value, source, options, onChange, onRevert }: {
+  label: string; configKey: string; value: string; source?: string; options: string[];
+  onChange: (key: string, value: unknown) => void; onRevert: (key: string) => void;
+}) {
+  return (
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+      <div className="flex items-center gap-2 min-w-0">
+        <span className="text-sm text-foreground">{label}</span>
+        <SourceBadge source={source} />
+      </div>
+      <div className="flex items-center gap-2 shrink-0">
+        <select
+          value={value ?? ''}
+          onChange={(e) => onChange(configKey, e.target.value)}
+          className="h-8 rounded-md border border-input bg-background px-2.5 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+        >
+          {options.map(opt => <option key={opt} value={opt}>{opt}</option>)}
+        </select>
+        {source === 'admin' && (
+          <button onClick={() => onRevert(configKey)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+            <RotateCcw className="w-3.5 h-3.5" />
+          </button>
+        )}
+      </div>
+    </div>
+  );
+}

app/(main)/admin/_tabs/telemetry.tsx

@@ -0,0 +1,250 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { Loader2, Send, Save, CheckCircle2, XCircle, ExternalLink } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+
+interface TelemetryStatus {
+  consent: 'pending' | 'on' | 'off';
+  consentSource: 'env' | 'file';
+  endpoint: string;
+  defaultEndpoint: string;
+  consentedAt: string | null;
+  lastSentAt: string | null;
+  nextScheduledAt: string | null;
+  payloadPreview: Record<string, unknown>;
+  accountCounts: { total: number; active7d: number };
+}
+
+function timeAgo(iso: string | null): string {
+  if (!iso) return 'never';
+  const d = Date.now() - new Date(iso).getTime();
+  if (d < 0) return new Date(iso).toLocaleString();
+  const m = Math.floor(d / 60000);
+  if (m < 1) return 'just now';
+  if (m < 60) return `${m} min ago`;
+  const h = Math.floor(m / 60);
+  if (h < 48) return `${h} hours ago`;
+  const days = Math.floor(h / 24);
+  return `${days} days ago`;
+}
+
+export function TelemetryTab() {
+  const [status, setStatus] = useState<TelemetryStatus | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [busy, setBusy] = useState<string | null>(null);
+  const [endpointDraft, setEndpointDraft] = useState('');
+  const [sendResult, setSendResult] = useState<{ ok: boolean; msg: string } | null>(null);
+
+  async function refresh(): Promise<void> {
+    setLoading(true);
+    try {
+      const r = await apiFetch('/api/admin/telemetry');
+      if (!r.ok) throw new Error('failed to load');
+      const data = (await r.json()) as TelemetryStatus;
+      setStatus(data);
+      setEndpointDraft(data.endpoint);
+    } catch (err) {
+      console.error(err);
+    } finally {
+      setLoading(false);
+    }
+  }
+  useEffect(() => { void refresh(); }, []);
+
+  async function setConsent(consent: 'on' | 'off'): Promise<void> {
+    setBusy('consent');
+    try {
+      const r = await apiFetch('/api/admin/telemetry', {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ action: 'set-consent', consent }),
+      });
+      if (!r.ok) {
+        const j = (await r.json().catch(() => ({}))) as { error?: string };
+        alert(j.error ?? 'failed');
+      }
+      await refresh();
+    } finally { setBusy(null); }
+  }
+
+  async function saveEndpoint(): Promise<void> {
+    setBusy('endpoint');
+    try {
+      const r = await apiFetch('/api/admin/telemetry', {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ action: 'set-endpoint', endpoint: endpointDraft }),
+      });
+      if (!r.ok) {
+        const j = (await r.json().catch(() => ({}))) as { error?: string };
+        alert(j.error ?? 'failed');
+      }
+      await refresh();
+    } finally { setBusy(null); }
+  }
+
+  async function sendNow(): Promise<void> {
+    setBusy('send');
+    setSendResult(null);
+    try {
+      const r = await apiFetch('/api/admin/telemetry', {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ action: 'send-now' }),
+      });
+      const j = (await r.json().catch(() => ({}))) as { ok?: boolean; status?: number; error?: string };
+      setSendResult({
+        ok: !!j.ok,
+        msg: j.ok ? `sent (HTTP ${j.status ?? '?'})` : `failed: ${j.error ?? 'unknown'}`,
+      });
+      await refresh();
+    } finally { setBusy(null); }
+  }
+
+  if (loading || !status) {
+    return (
+      <div className="p-8 flex items-center gap-2 text-muted-foreground">
+        <Loader2 className="h-4 w-4 animate-spin" /> loading…
+      </div>
+    );
+  }
+
+  const envOverridden = status.consentSource === 'env';
+  const isOn = status.consent === 'on';
+
+  return (
+    <div className="space-y-6">
+      <header className="space-y-2">
+        <h1 className="text-2xl font-semibold">Anonymous Usage Stats</h1>
+        <p className="text-sm text-muted-foreground">
+          Bulwark sends one anonymous heartbeat per day so we can see how many instances are
+          running, on what platforms, and which features they use. <strong>Enabled by default</strong>;
+          one click below disables it. No email addresses, no hostnames, no IPs are sent.{' '}
+          <a
+            href="https://bulwarkmail.org/docs/legal/privacy/telemetry"
+            target="_blank"
+            rel="noreferrer"
+            className="underline inline-flex items-center gap-1"
+          >
+            Full schema and policy <ExternalLink className="h-3 w-3" />
+          </a>
+        </p>
+      </header>
+
+      <section className="rounded-lg border p-4 space-y-3">
+        <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
+          <div className="min-w-0">
+            <div className="font-medium">Status</div>
+            <div className="text-sm text-muted-foreground">
+              {status.consent === 'pending' && 'Initialising - no heartbeats sent yet.'}
+              {status.consent === 'on' && 'Heartbeats are enabled (default).'}
+              {status.consent === 'off' && 'Heartbeats are off.'}
+              {envOverridden && (
+                <> Locked by <code>BULWARK_TELEMETRY</code> env var.</>
+              )}
+            </div>
+          </div>
+          <div className="flex gap-2">
+            <button
+              type="button"
+              disabled={busy === 'consent' || envOverridden || isOn}
+              onClick={() => void setConsent('on')}
+              className="px-3 py-1.5 rounded-md border bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
+            >
+              Enable
+            </button>
+            <button
+              type="button"
+              disabled={busy === 'consent' || envOverridden || status.consent === 'off'}
+              onClick={() => void setConsent('off')}
+              className="px-3 py-1.5 rounded-md border hover:bg-accent disabled:opacity-50"
+            >
+              Disable
+            </button>
+          </div>
+        </div>
+        <dl className="grid grid-cols-2 gap-2 text-sm pt-2 border-t">
+          <dt className="text-muted-foreground">Last sent</dt>
+          <dd>{timeAgo(status.lastSentAt)}</dd>
+          <dt className="text-muted-foreground">Next scheduled</dt>
+          <dd>{timeAgo(status.nextScheduledAt)}</dd>
+          <dt className="text-muted-foreground">Consented at</dt>
+          <dd>{status.consentedAt ? new Date(status.consentedAt).toLocaleString() : '-'}</dd>
+        </dl>
+      </section>
+
+      <section className="rounded-lg border p-4 space-y-2">
+        <div className="font-medium">Account activity</div>
+        <p className="text-sm text-muted-foreground">
+          Unique accounts that have logged in over the last 90 days. Identities are stored as a
+          per-instance HMAC, never as plaintext usernames. These are the numbers reported in the
+          heartbeat as bucketed ranges.
+        </p>
+        <dl className="grid grid-cols-2 gap-2 text-sm pt-1">
+          <dt className="text-muted-foreground">Total (90d)</dt>
+          <dd className="font-mono">{status.accountCounts?.total ?? 0}</dd>
+          <dt className="text-muted-foreground">Active (7d)</dt>
+          <dd className="font-mono">{status.accountCounts?.active7d ?? 0}</dd>
+        </dl>
+      </section>
+
+      <section className="rounded-lg border p-4 space-y-3">
+        <div className="font-medium">Endpoint</div>
+        <p className="text-sm text-muted-foreground">
+          Where heartbeats are sent. Defaults to the project&apos;s collector. Point at your own collector
+          (open source at <code>bulwarkmail/dashboard</code>) or clear this field to disable sending.
+        </p>
+        <div className="flex flex-col sm:flex-row gap-2">
+          <input
+            type="url"
+            value={endpointDraft}
+            onChange={(e) => setEndpointDraft(e.target.value)}
+            placeholder={status.defaultEndpoint}
+            className="flex-1 min-w-0 px-3 py-1.5 rounded-md border bg-background"
+          />
+          <button
+            type="button"
+            disabled={busy === 'endpoint' || endpointDraft === status.endpoint}
+            onClick={() => void saveEndpoint()}
+            className="shrink-0 px-3 py-1.5 rounded-md border bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 inline-flex items-center justify-center gap-1"
+          >
+            <Save className="h-4 w-4" /> Save
+          </button>
+        </div>
+      </section>
+
+      <section className="rounded-lg border p-4 space-y-3">
+        <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
+          <div className="min-w-0">
+            <div className="font-medium">Payload preview</div>
+            <div className="text-sm text-muted-foreground">
+              Exactly what the next heartbeat would send from this install, right now.
+            </div>
+          </div>
+          <button
+            type="button"
+            disabled={busy === 'send' || !isOn}
+            onClick={() => void sendNow()}
+            className="shrink-0 px-3 py-1.5 rounded-md border bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 inline-flex items-center gap-1"
+          >
+            <Send className="h-4 w-4" /> Send now
+          </button>
+        </div>
+        {sendResult && (
+          <div
+            className={`text-sm flex items-center gap-2 ${
+              sendResult.ok ? 'text-emerald-600' : 'text-red-600'
+            }`}
+          >
+            {sendResult.ok ? <CheckCircle2 className="h-4 w-4" /> : <XCircle className="h-4 w-4" />}
+            {sendResult.msg}
+          </div>
+        )}
+        <pre className="text-xs bg-muted/50 rounded-md p-3 overflow-x-auto max-h-96">
+          {JSON.stringify(status.payloadPreview, null, 2)}
+        </pre>
+      </section>
+    </div>
+  );
+}

app/(main)/admin/_tabs/themes.tsx

@@ -0,0 +1,545 @@
+'use client';
+
+import { useEffect, useState, useRef } from 'react';
+import { Upload, Trash2, Power, PowerOff, Loader2, Palette, Save, Shield, Lock, LockOpen } from 'lucide-react';
+import type { SettingsPolicy } from '@/lib/admin/types';
+import { DEFAULT_POLICY, DEFAULT_THEME_POLICY } from '@/lib/admin/types';
+import { apiFetch } from '@/lib/browser-navigation';
+
+const BUILTIN_THEME_OPTIONS = [
+  { id: 'builtin-nord', name: 'Nord' },
+  { id: 'builtin-catppuccin', name: 'Catppuccin' },
+  { id: 'builtin-solarized', name: 'Solarized' },
+];
+
+interface ThemeEntry {
+  id: string;
+  name: string;
+  version: string;
+  author: string;
+  description: string;
+  variants: string[];
+  enabled: boolean;
+  forceEnabled?: boolean;
+  installedAt: string;
+  updatedAt: string;
+}
+
+export function ThemesTab() {
+  const [themes, setThemes] = useState<ThemeEntry[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [uploading, setUploading] = useState(false);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  const [policy, setPolicy] = useState<SettingsPolicy>({ ...DEFAULT_POLICY });
+  const [policyDirty, setPolicyDirty] = useState(false);
+  const [savingPolicy, setSavingPolicy] = useState(false);
+
+  useEffect(() => { fetchThemes(); fetchPolicy(); }, []);
+
+  async function fetchPolicy() {
+    try {
+      const res = await apiFetch('/api/admin/policy');
+      if (res.ok) {
+        const data = await res.json();
+        setPolicy({
+          ...data,
+          themePolicy: { ...DEFAULT_THEME_POLICY, ...(data.themePolicy || {}) },
+        });
+      }
+    } catch { /* ignore */ }
+  }
+
+  function toggleThemesEnabled() {
+    setPolicy(prev => ({
+      ...prev,
+      features: { ...prev.features, themesEnabled: !prev.features.themesEnabled },
+    }));
+    setPolicyDirty(true);
+    setMessage(null);
+  }
+
+  function toggleUserThemeUploads() {
+    setPolicy(prev => ({
+      ...prev,
+      features: { ...prev.features, userThemesEnabled: !prev.features.userThemesEnabled },
+    }));
+    setPolicyDirty(true);
+    setMessage(null);
+  }
+
+  function toggleBuiltinTheme(themeId: string) {
+    setPolicy(prev => {
+      const disabled = prev.themePolicy?.disabledBuiltinThemes || [];
+      const isDisabled = disabled.includes(themeId);
+      return {
+        ...prev,
+        themePolicy: {
+          ...DEFAULT_THEME_POLICY,
+          ...prev.themePolicy,
+          disabledBuiltinThemes: isDisabled
+            ? disabled.filter((id: string) => id !== themeId)
+            : [...disabled, themeId],
+        },
+      };
+    });
+    setPolicyDirty(true);
+    setMessage(null);
+  }
+
+  function toggleAdminTheme(themeId: string) {
+    setPolicy(prev => {
+      const disabled = prev.themePolicy?.disabledThemes || [];
+      const isDisabled = disabled.includes(themeId);
+      return {
+        ...prev,
+        themePolicy: {
+          ...DEFAULT_THEME_POLICY,
+          ...prev.themePolicy,
+          disabledThemes: isDisabled
+            ? disabled.filter((id: string) => id !== themeId)
+            : [...disabled, themeId],
+        },
+      };
+    });
+    setPolicyDirty(true);
+    setMessage(null);
+  }
+
+  function setDefaultTheme(themeId: string | null) {
+    setPolicy(prev => ({
+      ...prev,
+      themePolicy: {
+        ...DEFAULT_THEME_POLICY,
+        ...prev.themePolicy,
+        defaultThemeId: themeId,
+      },
+    }));
+    setPolicyDirty(true);
+    setMessage(null);
+  }
+
+  async function handleSavePolicy() {
+    setSavingPolicy(true);
+    setMessage(null);
+    try {
+      const res = await apiFetch('/api/admin/policy', {
+        method: 'PUT',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(policy),
+      });
+      if (res.ok) {
+        setMessage({ type: 'success', text: 'Theme policy saved. Users will see changes on next login.' });
+        setPolicyDirty(false);
+      } else {
+        const data = await res.json();
+        setMessage({ type: 'error', text: data.error || 'Failed to save policy' });
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Failed to save policy' });
+    } finally {
+      setSavingPolicy(false);
+    }
+  }
+
+  async function fetchThemes() {
+    setLoading(true);
+    try {
+      const res = await apiFetch('/api/admin/themes');
+      if (res.ok) setThemes(await res.json());
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleUpload(e: React.ChangeEvent<HTMLInputElement>) {
+    const file = e.target.files?.[0];
+    if (!file) return;
+
+    setUploading(true);
+    setMessage(null);
+
+    const formData = new FormData();
+    formData.append('file', file);
+
+    try {
+      const res = await apiFetch('/api/admin/themes', {
+        method: 'POST',
+        body: formData,
+      });
+
+      const data = await res.json();
+      if (res.ok) {
+        const warnings = data.warnings?.length ? ` (${data.warnings.length} warning(s))` : '';
+        setMessage({ type: 'success', text: `Theme "${data.theme.name}" installed${warnings}` });
+        await fetchThemes();
+      } else {
+        setMessage({ type: 'error', text: data.error || 'Upload failed' });
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Upload failed' });
+    } finally {
+      setUploading(false);
+      if (fileInputRef.current) fileInputRef.current.value = '';
+    }
+  }
+
+  async function toggleTheme(id: string, enabled: boolean) {
+    setMessage(null);
+    const res = await apiFetch('/api/admin/themes', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ id, enabled }),
+    });
+
+    if (res.ok) {
+      setThemes(prev => prev.map(t => t.id === id ? { ...t, enabled } : t));
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Update failed' });
+    }
+  }
+
+  async function toggleForceEnabled(id: string, forceEnabled: boolean) {
+    setMessage(null);
+    const body: Record<string, unknown> = { id, forceEnabled };
+    if (forceEnabled) body.enabled = true;
+
+    const res = await apiFetch('/api/admin/themes', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body),
+    });
+
+    if (res.ok) {
+      setThemes(prev => prev.map(t => t.id === id ? { ...t, forceEnabled, ...(forceEnabled ? { enabled: true } : {}) } : t));
+      setPolicy(prev => {
+        const current = prev.forceEnabledThemes || [];
+        return {
+          ...prev,
+          forceEnabledThemes: forceEnabled
+            ? [...current.filter(tid => tid !== id), id]
+            : current.filter(tid => tid !== id),
+        };
+      });
+      setPolicyDirty(true);
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Update failed' });
+    }
+  }
+
+  async function forceEnableAll() {
+    setMessage(null);
+    const disabled = themes.filter(t => !t.enabled);
+    if (disabled.length === 0) {
+      setMessage({ type: 'success', text: 'All themes are already enabled' });
+      return;
+    }
+    let failed = 0;
+    for (const t of disabled) {
+      const res = await apiFetch('/api/admin/themes', {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ id: t.id, enabled: true }),
+      });
+      if (!res.ok) failed++;
+    }
+    if (failed === 0) {
+      await fetchThemes();
+      setMessage({ type: 'success', text: `All ${disabled.length} theme(s) enabled` });
+    } else {
+      await fetchThemes();
+      setMessage({ type: 'error', text: `${failed} theme(s) failed to enable` });
+    }
+  }
+
+  async function forceDisableAll() {
+    setMessage(null);
+    const enabled = themes.filter(t => t.enabled);
+    if (enabled.length === 0) {
+      setMessage({ type: 'success', text: 'All themes are already disabled' });
+      return;
+    }
+    let failed = 0;
+    for (const t of enabled) {
+      const res = await apiFetch('/api/admin/themes', {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ id: t.id, enabled: false }),
+      });
+      if (!res.ok) failed++;
+    }
+    if (failed === 0) {
+      await fetchThemes();
+      setMessage({ type: 'success', text: `All ${enabled.length} theme(s) disabled` });
+    } else {
+      await fetchThemes();
+      setMessage({ type: 'error', text: `${failed} theme(s) failed to disable` });
+    }
+  }
+
+  async function deleteTheme(id: string, name: string) {
+    if (!confirm(`Remove theme "${name}"? This cannot be undone.`)) return;
+
+    setMessage(null);
+    const res = await apiFetch('/api/admin/themes', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ id }),
+    });
+
+    if (res.ok) {
+      setThemes(prev => prev.filter(t => t.id !== id));
+      setMessage({ type: 'success', text: `Theme "${name}" removed` });
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Delete failed' });
+    }
+  }
+
+  if (loading) {
+    return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
+  }
+
+  const themesEnabled = policy.features.themesEnabled ?? true;
+  const userThemesEnabled = policy.features.userThemesEnabled ?? true;
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Themes</h1>
+          <p className="text-sm text-muted-foreground mt-1">Manage themes and theme policy for all users</p>
+        </div>
+        <div className="flex flex-wrap items-center gap-2">
+          {policyDirty && (
+            <button
+              onClick={handleSavePolicy}
+              disabled={savingPolicy}
+              className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+            >
+              {savingPolicy ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
+              Save Policy
+            </button>
+          )}
+          <label className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 cursor-pointer transition-all shadow-sm">
+            {uploading ? <Loader2 className="w-4 h-4 animate-spin" /> : <Upload className="w-4 h-4" />}
+            Upload Theme
+            <input
+              ref={fileInputRef}
+              type="file"
+              accept=".zip"
+              onChange={handleUpload}
+              disabled={uploading}
+              className="sr-only"
+            />
+          </label>
+        </div>
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <div className="flex items-center gap-2">
+            <Shield className="w-4 h-4 text-muted-foreground" />
+            <h2 className="text-sm font-medium text-foreground">Theme Policy</h2>
+          </div>
+          <p className="text-xs text-muted-foreground mt-0.5">Control theme availability and defaults for users</p>
+        </div>
+
+        <div className="divide-y divide-border">
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+            <div className="min-w-0">
+              <span className="text-sm text-foreground">Themes Enabled</span>
+              <p className="text-xs text-muted-foreground mt-0.5">Allow users to select and apply themes</p>
+            </div>
+            <button onClick={toggleThemesEnabled}
+              className={`shrink-0 relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${themesEnabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+              <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${themesEnabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+            </button>
+          </div>
+
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+            <div className="min-w-0">
+              <span className="text-sm text-foreground">User Theme Uploads</span>
+              <p className="text-xs text-muted-foreground mt-0.5">Allow users to upload their own theme files</p>
+            </div>
+            <button onClick={toggleUserThemeUploads}
+              className={`shrink-0 relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${userThemesEnabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+              <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${userThemesEnabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+            </button>
+          </div>
+
+          {themes.length > 0 && (
+            <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div className="min-w-0">
+                <span className="text-sm text-foreground">Force Enable / Disable All</span>
+                <p className="text-xs text-muted-foreground mt-0.5">Bulk toggle all deployed themes at once</p>
+              </div>
+              <div className="flex items-center gap-2 shrink-0">
+                <button
+                  onClick={forceEnableAll}
+                  className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-emerald-600 text-white text-xs font-medium hover:bg-emerald-700 transition-colors"
+                >
+                  <Power className="w-3.5 h-3.5" />
+                  Enable All
+                </button>
+                <button
+                  onClick={forceDisableAll}
+                  className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-muted text-muted-foreground text-xs font-medium hover:bg-accent hover:text-foreground transition-colors"
+                >
+                  <PowerOff className="w-3.5 h-3.5" />
+                  Disable All
+                </button>
+              </div>
+            </div>
+          )}
+
+          <div className="px-4 py-3">
+            <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div className="min-w-0">
+                <span className="text-sm text-foreground">Default Theme</span>
+                <p className="text-xs text-muted-foreground mt-0.5">Theme applied when users have not chosen one</p>
+              </div>
+              <select
+                value={policy.themePolicy?.defaultThemeId || ''}
+                onChange={(e) => setDefaultTheme(e.target.value || null)}
+                className="h-8 px-2 w-full sm:w-auto shrink-0 rounded-md border border-input bg-background text-sm text-foreground"
+              >
+                <option value="">System Default</option>
+                <optgroup label="Built-in">
+                  {BUILTIN_THEME_OPTIONS
+                    .filter(t => !(policy.themePolicy?.disabledBuiltinThemes || []).includes(t.id))
+                    .map(t => (
+                      <option key={t.id} value={t.id}>{t.name}</option>
+                    ))}
+                </optgroup>
+                {themes.length > 0 && (
+                  <optgroup label="Admin-deployed">
+                    {themes
+                      .filter(t => !(policy.themePolicy?.disabledThemes || []).includes(t.id))
+                      .map(t => (
+                        <option key={t.id} value={t.id}>{t.name}</option>
+                      ))}
+                  </optgroup>
+                )}
+              </select>
+            </div>
+          </div>
+
+          <div className="px-4 py-3">
+            <span className="text-xs font-medium uppercase tracking-wider text-muted-foreground">Built-in Themes</span>
+            <div className="mt-2 space-y-2">
+              {BUILTIN_THEME_OPTIONS.map(theme => {
+                const disabled = (policy.themePolicy?.disabledBuiltinThemes || []).includes(theme.id);
+                return (
+                  <div key={theme.id} className="flex items-center justify-between gap-4">
+                    <span className="text-sm text-foreground">{theme.name}</span>
+                    <button onClick={() => toggleBuiltinTheme(theme.id)}
+                      className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${!disabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+                      <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${!disabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+                    </button>
+                  </div>
+                );
+              })}
+            </div>
+          </div>
+
+          {themes.length > 0 && (
+            <div className="px-4 py-3">
+              <span className="text-xs font-medium uppercase tracking-wider text-muted-foreground">Admin-deployed Themes</span>
+              <div className="mt-2 space-y-2">
+                {themes.map(theme => {
+                  const disabled = (policy.themePolicy?.disabledThemes || []).includes(theme.id);
+                  return (
+                    <div key={theme.id} className="flex items-center justify-between gap-4">
+                      <span className="text-sm text-foreground">{theme.name}</span>
+                      <button onClick={() => toggleAdminTheme(theme.id)}
+                        className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${!disabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+                        <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${!disabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
+                      </button>
+                    </div>
+                  );
+                })}
+              </div>
+            </div>
+          )}
+        </div>
+      </div>
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <div className="flex items-center gap-2">
+            <Palette className="w-4 h-4 text-muted-foreground" />
+            <h2 className="text-sm font-medium text-foreground">Deployed Themes</h2>
+          </div>
+          <p className="text-xs text-muted-foreground mt-0.5">Admin-uploaded themes available to all users</p>
+        </div>
+        {themes.length === 0 ? (
+          <div className="p-12 text-center">
+            <Palette className="w-10 h-10 text-muted-foreground/40 mx-auto mb-3" />
+            <p className="text-sm text-muted-foreground">No themes installed</p>
+            <p className="text-xs text-muted-foreground mt-1">Upload a theme ZIP file to get started</p>
+          </div>
+        ) : (
+          <div className="divide-y divide-border">
+            {themes.map(theme => (
+              <div key={theme.id} className="px-4 py-4 flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="min-w-0 flex-1">
+                  <div className="flex flex-wrap items-center gap-x-2 gap-y-1">
+                    <span className="text-sm font-medium text-foreground">{theme.name}</span>
+                    <span className="text-xs text-muted-foreground">v{theme.version}</span>
+                    <span className={`text-xs px-1.5 py-0.5 rounded ${theme.enabled ? 'bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400' : 'bg-muted text-muted-foreground'}`}>
+                      {theme.enabled ? 'Enabled' : 'Disabled'}
+                    </span>
+                    {theme.forceEnabled && (
+                      <span className="text-xs px-1.5 py-0.5 rounded bg-amber-100 text-amber-700 dark:bg-amber-950/30 dark:text-amber-400 flex items-center gap-1">
+                        <Lock className="w-3 h-3" /> Forced
+                      </span>
+                    )}
+                  </div>
+                  {theme.description && (
+                    <p className="text-xs text-muted-foreground mt-0.5 truncate">{theme.description}</p>
+                  )}
+                  <div className="text-xs text-muted-foreground mt-1">
+                    by {theme.author} &middot; {theme.variants.join(', ')} &middot; installed {new Date(theme.installedAt).toLocaleDateString()}
+                  </div>
+                </div>
+
+                <div className="flex items-center gap-2">
+                  <button
+                    onClick={() => toggleForceEnabled(theme.id, !theme.forceEnabled)}
+                    title={theme.forceEnabled ? 'Remove force-enable (users can deactivate)' : 'Force enable (users cannot deactivate)'}
+                    className={`p-2 rounded-md transition-colors ${theme.forceEnabled ? 'bg-amber-100 text-amber-700 hover:bg-amber-200 dark:bg-amber-950/30 dark:text-amber-400 dark:hover:bg-amber-950/50' : 'hover:bg-accent text-muted-foreground hover:text-foreground'}`}
+                  >
+                    {theme.forceEnabled ? <Lock className="w-4 h-4" /> : <LockOpen className="w-4 h-4" />}
+                  </button>
+                  <button
+                    onClick={() => toggleTheme(theme.id, !theme.enabled)}
+                    title={theme.enabled ? 'Disable' : 'Enable'}
+                    className="p-2 rounded-md hover:bg-accent text-muted-foreground hover:text-foreground transition-colors"
+                  >
+                    <Power className="w-4 h-4" />
+                  </button>
+                  <button
+                    onClick={() => deleteTheme(theme.id, theme.name)}
+                    title="Remove"
+                    className="p-2 rounded-md hover:bg-destructive/10 text-muted-foreground hover:text-destructive transition-colors"
+                  >
+                    <Trash2 className="w-4 h-4" />
+                  </button>
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

app/(main)/admin/_tabs/version.tsx

@@ -0,0 +1,237 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import {
+  Loader2,
+  RefreshCw,
+  CheckCircle2,
+  AlertTriangle,
+  ShieldAlert,
+  ExternalLink,
+} from 'lucide-react';
+import { SettingsSection, SettingItem } from '@/components/settings/settings-section';
+import { apiFetch } from '@/lib/browser-navigation';
+import type { UpdateStatus, UpdateSeverity } from '@/lib/version-check/types';
+
+interface VersionAdminStatus {
+  current: string;
+  build: string;
+  endpoint: string;
+  defaultEndpoint: string;
+  disabledByEnv: boolean;
+  lastCheckedAt: string | null;
+  lastSuccessAt: string | null;
+  nextScheduledAt: string | null;
+  status: UpdateStatus | null;
+}
+
+function timeAgo(iso: string | null): string {
+  if (!iso) return 'never';
+  const d = Date.now() - new Date(iso).getTime();
+  if (d < 0) return new Date(iso).toLocaleString();
+  const m = Math.floor(d / 60000);
+  if (m < 1) return 'just now';
+  if (m < 60) return `${m} min ago`;
+  const h = Math.floor(m / 60);
+  if (h < 48) return `${h} hours ago`;
+  return `${Math.floor(h / 24)} days ago`;
+}
+
+function severityChip(severity: UpdateSeverity) {
+  switch (severity) {
+    case 'security':
+      return {
+        label: 'Security update',
+        className: 'bg-red-500/10 text-red-700 dark:text-red-300 border-red-500/30',
+        Icon: ShieldAlert,
+      };
+    case 'deprecated':
+      return {
+        label: 'Deprecated',
+        className: 'bg-red-500/10 text-red-700 dark:text-red-300 border-red-500/30',
+        Icon: ShieldAlert,
+      };
+    case 'normal':
+      return {
+        label: 'Update available',
+        className: 'bg-amber-500/10 text-amber-700 dark:text-amber-300 border-amber-500/30',
+        Icon: AlertTriangle,
+      };
+    case 'unknown':
+      return {
+        label: 'Unknown',
+        className: 'bg-muted text-muted-foreground border-border',
+        Icon: AlertTriangle,
+      };
+    case 'none':
+    default:
+      return {
+        label: 'Up to date',
+        className: 'bg-emerald-500/10 text-emerald-700 dark:text-emerald-300 border-emerald-500/30',
+        Icon: CheckCircle2,
+      };
+  }
+}
+
+export function VersionTab() {
+  const [data, setData] = useState<VersionAdminStatus | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [checking, setChecking] = useState(false);
+  const [checkResult, setCheckResult] = useState<{ ok: boolean; msg: string } | null>(null);
+
+  async function refresh(): Promise<void> {
+    setLoading(true);
+    try {
+      const r = await apiFetch('/api/admin/version');
+      if (!r.ok) throw new Error('failed to load');
+      setData((await r.json()) as VersionAdminStatus);
+    } catch (err) {
+      console.error(err);
+    } finally {
+      setLoading(false);
+    }
+  }
+  useEffect(() => { void refresh(); }, []);
+
+  async function checkNow(): Promise<void> {
+    setChecking(true);
+    setCheckResult(null);
+    try {
+      const r = await apiFetch('/api/admin/version', {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ action: 'check-now' }),
+      });
+      const j = (await r.json().catch(() => ({}))) as { ok?: boolean; error?: string };
+      setCheckResult({
+        ok: !!j.ok,
+        msg: j.ok ? 'Update check completed.' : `Failed: ${j.error ?? 'unknown'}`,
+      });
+      await refresh();
+    } finally {
+      setChecking(false);
+    }
+  }
+
+  if (loading || !data) {
+    return (
+      <div className="p-8 flex items-center gap-2 text-muted-foreground">
+        <Loader2 className="h-4 w-4 animate-spin" /> loading…
+      </div>
+    );
+  }
+
+  const status = data.status;
+  const chip = severityChip(status?.severity ?? 'none');
+  const ChipIcon = chip.Icon;
+  const releaseUrl = status?.url ?? null;
+  const newer = status?.latest && status.latest !== data.current ? status.latest : null;
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Version</h1>
+          <p className="text-sm text-muted-foreground mt-1">
+            Hourly check against the Bulwark version server. Severity is decided server-side and
+            disable with <code>BULWARK_UPDATE_CHECK=off</code>.
+          </p>
+        </div>
+        <button
+          type="button"
+          disabled={checking}
+          onClick={() => void checkNow()}
+          className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+        >
+          {checking ? <Loader2 className="w-4 h-4 animate-spin" /> : <RefreshCw className="w-4 h-4" />}
+          Check now
+        </button>
+      </div>
+
+      {checkResult && (
+        <div
+          className={`text-sm rounded-md px-3 py-2 ${
+            checkResult.ok
+              ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300'
+              : 'bg-destructive/10 text-destructive'
+          }`}
+        >
+          {checkResult.msg}
+        </div>
+      )}
+
+      <SettingsSection title="Status">
+        <SettingItem label="Severity">
+          <span
+            className={`inline-flex items-center gap-1.5 rounded-full border px-2 py-0.5 text-xs font-medium ${chip.className}`}
+          >
+            <ChipIcon className="h-3 w-3" />
+            {chip.label}
+          </span>
+        </SettingItem>
+        <SettingItem label="Running" description={data.build !== 'unknown' ? `Build ${data.build}` : undefined}>
+          <span className="text-sm font-mono text-foreground">{data.current}</span>
+        </SettingItem>
+        {newer && (
+          <SettingItem label="Latest release">
+            {releaseUrl ? (
+              <a
+                href={releaseUrl}
+                target="_blank"
+                rel="noreferrer"
+                className="inline-flex items-center gap-1 text-sm font-mono text-foreground hover:underline"
+              >
+                {newer} <ExternalLink className="w-3 h-3" />
+              </a>
+            ) : (
+              <span className="text-sm font-mono text-foreground">{newer}</span>
+            )}
+          </SettingItem>
+        )}
+        {status?.advisory && (
+          <SettingItem label="Advisory">
+            <span className="text-sm font-mono text-red-600 dark:text-red-400">{status.advisory}</span>
+          </SettingItem>
+        )}
+      </SettingsSection>
+
+      <SettingsSection title="Schedule" description="Hourly polling with ±5 minute jitter.">
+        <SettingItem label="Last checked">
+          <span className="text-sm text-foreground">{timeAgo(data.lastCheckedAt)}</span>
+        </SettingItem>
+        <SettingItem label="Last success">
+          <span className="text-sm text-foreground">{timeAgo(data.lastSuccessAt)}</span>
+        </SettingItem>
+        <SettingItem label="Next scheduled">
+          <span className="text-sm text-foreground">{timeAgo(data.nextScheduledAt)}</span>
+        </SettingItem>
+        {status?.checkedAt && (
+          <SettingItem label="Server timestamp" description="When the server last refreshed its release list.">
+            <span className="text-sm text-foreground">{new Date(status.checkedAt).toLocaleString()}</span>
+          </SettingItem>
+        )}
+      </SettingsSection>
+
+      <SettingsSection title="Source">
+        <SettingItem
+          label="Endpoint"
+          description={data.endpoint === data.defaultEndpoint ? 'Default endpoint.' : `Default: ${data.defaultEndpoint}`}
+        >
+          <a
+            href={data.endpoint}
+            target="_blank"
+            rel="noreferrer"
+            className="inline-flex items-center gap-1 text-sm text-foreground hover:underline break-all"
+          >
+            {data.endpoint} <ExternalLink className="w-3 h-3 shrink-0" />
+          </a>
+        </SettingItem>
+        <SettingItem label="Disabled by env" description="Set BULWARK_UPDATE_CHECK=off to disable.">
+          <span className={`text-sm font-medium ${data.disabledByEnv ? 'text-amber-600 dark:text-amber-400' : 'text-muted-foreground'}`}>
+            {data.disabledByEnv ? 'Yes' : 'No'}
+          </span>
+        </SettingItem>
+      </SettingsSection>
+    </div>
+  );
+}

app/(main)/admin/auth/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=auth');
+}

app/(main)/admin/branding/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=branding');
+}

app/(main)/admin/change-password/page.tsx

@@ -0,0 +1,117 @@
+'use client';
+
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import { Lock } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+
+export default function ChangePasswordPage() {
+  const router = useRouter();
+  const [currentPassword, setCurrentPassword] = useState('');
+  const [newPassword, setNewPassword] = useState('');
+  const [confirmPassword, setConfirmPassword] = useState('');
+  const [error, setError] = useState('');
+  const [success, setSuccess] = useState(false);
+  const [loading, setLoading] = useState(false);
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    setError('');
+    setSuccess(false);
+
+    if (newPassword.length < 8) {
+      setError('New password must be at least 8 characters.');
+      return;
+    }
+    if (newPassword !== confirmPassword) {
+      setError('New passwords do not match.');
+      return;
+    }
+
+    setLoading(true);
+    const res = await apiFetch('/api/admin/change-password', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ currentPassword, newPassword }),
+    });
+
+    if (res.ok) {
+      setSuccess(true);
+      setCurrentPassword('');
+      setNewPassword('');
+      setConfirmPassword('');
+      setTimeout(() => router.push('/admin'), 2000);
+    } else {
+      const data = await res.json().catch(() => ({}));
+      setError(data.error || 'Failed to change password.');
+    }
+    setLoading(false);
+  }
+
+  return (
+    <div className="max-w-md mx-auto space-y-6">
+      <div>
+        <h1 className="text-2xl font-semibold text-foreground">Change Password</h1>
+        <p className="text-sm text-muted-foreground mt-1">Update your admin password.</p>
+      </div>
+
+      <form onSubmit={handleSubmit} className="space-y-4">
+        <div className="space-y-1.5">
+          <label className="text-sm font-medium text-foreground">Current Password</label>
+          <div className="relative">
+            <Lock className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
+            <input
+              type="password"
+              value={currentPassword}
+              onChange={e => setCurrentPassword(e.target.value)}
+              required
+              className="w-full h-9 pl-9 pr-3 rounded-md border border-input bg-background text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+              autoComplete="current-password"
+            />
+          </div>
+        </div>
+
+        <div className="space-y-1.5">
+          <label className="text-sm font-medium text-foreground">New Password</label>
+          <input
+            type="password"
+            value={newPassword}
+            onChange={e => setNewPassword(e.target.value)}
+            required
+            minLength={8}
+            className="w-full h-9 px-3 rounded-md border border-input bg-background text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+            autoComplete="new-password"
+          />
+        </div>
+
+        <div className="space-y-1.5">
+          <label className="text-sm font-medium text-foreground">Confirm New Password</label>
+          <input
+            type="password"
+            value={confirmPassword}
+            onChange={e => setConfirmPassword(e.target.value)}
+            required
+            minLength={8}
+            className="w-full h-9 px-3 rounded-md border border-input bg-background text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+            autoComplete="new-password"
+          />
+        </div>
+
+        {error && (
+          <p className="text-sm text-red-500">{error}</p>
+        )}
+        {success && (
+          <p className="text-sm text-green-600">Password changed. Redirecting...</p>
+        )}
+
+        <button
+          type="submit"
+          disabled={loading}
+          className="w-full h-9 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
+        >
+          {loading ? 'Changing...' : 'Change Password'}
+        </button>
+      </form>
+    </div>
+  );
+}

app/(main)/admin/layout.tsx

@@ -0,0 +1,479 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { useRouter, usePathname } from 'next/navigation';
+import Link from 'next/link';
+import { useAdminTabStore, type AdminTabId } from '@/stores/admin-tab-store';
+import {
+  LayoutDashboard,
+  Settings,
+  Palette,
+  Shield,
+  Scale,
+  ScrollText,
+  LogOut,
+  KeyRound,
+  Puzzle,
+  SwatchBook,
+  Activity,
+  Package,
+  Mail,
+  Calendar,
+  BookUser,
+  HardDrive,
+  Store,
+  Menu,
+  X,
+} from 'lucide-react';
+import { cn } from '@/lib/utils';
+import { useConfig } from '@/hooks/use-config';
+import { usePolicyStore } from '@/stores/policy-store';
+import { useThemeStore } from '@/stores/theme-store';
+import { getActiveAccountSlotHeaders } from '@/lib/auth/active-account-slot';
+
+import { useUpdateStore, selectHasUpdate } from '@/stores/update-store';
+import { apiFetch, getPathPrefix } from '@/lib/browser-navigation';
+
+// Single-page tab navigation: clicks update a Zustand store. The URL stays
+// at /admin so React doesn't fire a route transition on every tab switch -
+// matches the regular settings page pattern, fixes the dev-mode "Rendering…"
+// hang we saw with both /admin/<segment> routes and ?tab= search params.
+const NAV_GROUPS: ReadonlyArray<{
+  label: string;
+  items: ReadonlyArray<{ tab: AdminTabId; label: string; icon: typeof LayoutDashboard }>;
+}> = [
+  {
+    label: 'Overview',
+    items: [
+      { tab: 'dashboard', label: 'Dashboard', icon: LayoutDashboard },
+    ],
+  },
+  {
+    label: 'Configuration',
+    items: [
+      { tab: 'settings', label: 'Settings', icon: Settings },
+      { tab: 'branding', label: 'Branding', icon: Palette },
+      { tab: 'auth', label: 'Authentication', icon: Shield },
+      { tab: 'policy', label: 'Policy', icon: Scale },
+    ],
+  },
+  {
+    label: 'Extensions',
+    items: [
+      { tab: 'plugins', label: 'Plugins', icon: Puzzle },
+      { tab: 'themes', label: 'Themes', icon: SwatchBook },
+      { tab: 'marketplace', label: 'Marketplace', icon: Store },
+    ],
+  },
+  {
+    label: 'System',
+    items: [
+      { tab: 'version', label: 'Version', icon: Package },
+      { tab: 'telemetry', label: 'Telemetry', icon: Activity },
+      { tab: 'logs', label: 'Audit Log', icon: ScrollText },
+    ],
+  },
+];
+
+export default function AdminLayout({ children }: { children: React.ReactNode }) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const storeActiveTab = useAdminTabStore((s) => s.activeTab);
+  const setActiveTab = useAdminTabStore((s) => s.setActiveTab);
+  // Highlight the active tab only on /admin itself - on dynamic routes
+  // (e.g. /admin/plugins/[id]) no tab is "current".
+  const activeTab = pathname === '/admin' ? storeActiveTab : null;
+  const [authenticated, setAuthenticated] = useState<boolean | null>(null);
+  const [authError, setAuthError] = useState<string | null>(null);
+  const [isStalwartAdmin, setIsStalwartAdmin] = useState(false);
+  const [mobileNavOpen, setMobileNavOpen] = useState(false);
+  const { appLogoLightUrl, appLogoDarkUrl, loginLogoLightUrl, loginLogoDarkUrl } = useConfig();
+  const filesEnabled = usePolicyStore((s) => s.isFeatureEnabled('filesEnabled'));
+  const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
+  const logoUrl = resolvedTheme === 'dark'
+    ? (appLogoDarkUrl || appLogoLightUrl || loginLogoDarkUrl)
+    : (appLogoLightUrl || appLogoDarkUrl || loginLogoLightUrl);
+
+  // Match the navigation rail: red for security/deprecated, amber for normal.
+  const hasUpdate = useUpdateStore(selectHasUpdate);
+  const updateSeverity = useUpdateStore((s) => s.status?.severity);
+  const startUpdatePolling = useUpdateStore((s) => s.startPolling);
+  useEffect(() => { startUpdatePolling(); }, [startUpdatePolling]);
+  const updateImportant = updateSeverity === 'security' || updateSeverity === 'deprecated';
+
+  useEffect(() => {
+    setMobileNavOpen(false);
+  }, [pathname]);
+
+  useEffect(() => {
+    if (!mobileNavOpen) return;
+    const previous = document.body.style.overflow;
+    document.body.style.overflow = 'hidden';
+    return () => {
+      document.body.style.overflow = previous;
+    };
+  }, [mobileNavOpen]);
+
+  useEffect(() => {
+    if (pathname === '/admin/login') return;
+    let cancelled = false;
+
+    async function checkAuth() {
+      try {
+        const jmapHeaders = getActiveAccountSlotHeaders();
+        const res = await apiFetch('/api/admin/auth', { headers: jmapHeaders });
+        const data = await res.json();
+        if (cancelled) return;
+
+        const stalwartAdmin = data.stalwartAdmin === true;
+        setIsStalwartAdmin(stalwartAdmin);
+
+        // If neither password-based admin nor Stalwart admin, redirect away
+        if (!data.enabled && !stalwartAdmin) {
+          router.replace('/');
+          return;
+        }
+
+        if (data.authenticated) {
+          setAuthenticated(true);
+          return;
+        }
+
+        // If Stalwart admin but not yet authenticated, auto-login
+        if (stalwartAdmin) {
+          const loginRes = await apiFetch('/api/admin/auth', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json', ...jmapHeaders },
+            body: JSON.stringify({ stalwartAuth: true }),
+          });
+          if (cancelled) return;
+          if (loginRes.ok) {
+            setAuthenticated(true);
+            return;
+          }
+          const body = await loginRes.json().catch(() => ({}));
+          setAuthError(body?.error || `Admin auto-login failed (HTTP ${loginRes.status})`);
+          setAuthenticated(false);
+          return;
+        }
+
+        router.replace('/admin/login');
+      } catch (err) {
+        if (cancelled) return;
+        setAuthError(err instanceof Error ? err.message : 'Network error during admin check');
+        setAuthenticated(false);
+      }
+    }
+
+    checkAuth();
+    return () => { cancelled = true; };
+  }, [pathname, router]);
+
+  async function handleLogout() {
+    await apiFetch('/api/admin/auth', { method: 'DELETE' });
+    router.replace('/admin/login');
+  }
+
+  // Don't gate the login page
+  if (pathname === '/admin/login') {
+    return <>{children}</>;
+  }
+
+  // /admin lives outside the [locale] tree, so links back to the webmail
+  // apps are bare <a> tags (hard navigation). Next.js only auto-applies
+  // basePath to <Link>/router APIs - for these we prepend it manually so
+  // NEXT_PUBLIC_BASE_PATH=/webmail deployments don't redirect to "/".
+  const prefix = getPathPrefix();
+
+  const navContent = (
+    <>
+      <div className="flex-1 overflow-y-auto py-2">
+        <div className="px-2 space-y-0.5">
+          {NAV_GROUPS.map((group, groupIndex) => (
+            <div key={group.label}>
+              {groupIndex > 0 && <div className="mx-1 my-2 border-t border-border" />}
+              <div className="px-3 pt-2.5 pb-1">
+                <span className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
+                  {group.label}
+                </span>
+              </div>
+              {group.items.map(({ tab, label, icon: Icon }) => {
+                const active = activeTab === tab;
+                const showDot = tab === 'version' && hasUpdate;
+                const handleClick = () => {
+                  setActiveTab(tab);
+                  // From a dynamic route (/admin/plugins/[id], /admin/marketplace/[slug])
+                  // we still need a real navigation back to /admin so the page renders.
+                  if (pathname !== '/admin') router.push('/admin');
+                };
+                return (
+                  <button
+                    key={tab}
+                    type="button"
+                    onClick={handleClick}
+                    className={cn(
+                      'w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
+                      active
+                        ? 'bg-accent text-accent-foreground font-medium'
+                        : 'hover:bg-muted text-foreground'
+                    )}
+                  >
+                    <span className="relative shrink-0">
+                      <Icon className={cn(
+                        'w-4 h-4',
+                        active ? 'text-accent-foreground' : 'text-muted-foreground'
+                      )} />
+                      {showDot && (
+                        <span
+                          className={cn(
+                            'absolute -top-0.5 -right-0.5 w-2 h-2 rounded-full ring-2',
+                            active ? 'ring-accent' : 'ring-background',
+                            updateImportant ? 'bg-red-500' : 'bg-amber-500',
+                          )}
+                          aria-label={updateImportant ? 'Important update available' : 'Update available'}
+                        />
+                      )}
+                    </span>
+                    {label}
+                  </button>
+                );
+              })}
+            </div>
+          ))}
+        </div>
+      </div>
+
+      <div className="px-2 py-2 border-t border-border space-y-0.5 shrink-0">
+        {!isStalwartAdmin && (
+          <Link
+            href="/admin/change-password"
+            className={cn(
+              'w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
+              pathname === '/admin/change-password'
+                ? 'bg-accent text-accent-foreground font-medium'
+                : 'hover:bg-muted text-foreground'
+            )}
+          >
+            <KeyRound className={cn(
+              'w-4 h-4 shrink-0',
+              pathname === '/admin/change-password' ? 'text-accent-foreground' : 'text-muted-foreground'
+            )} />
+            Change Password
+          </Link>
+        )}
+        <button
+          onClick={handleLogout}
+          className="w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5 hover:bg-muted text-foreground"
+        >
+          <LogOut className="w-4 h-4 shrink-0 text-muted-foreground" />
+          Sign out
+        </button>
+      </div>
+    </>
+  );
+
+  return (
+    <div className="min-h-screen flex bg-background">
+      {/* Slim webmail nav rail (desktop only) */}
+      <nav className="hidden md:flex w-14 bg-secondary flex-col items-center py-3 gap-2 border-r border-border sticky top-0 h-screen shrink-0">
+        {logoUrl ? (
+          <img src={logoUrl} alt="" className="w-7 h-7 object-contain mb-2" />
+        ) : (
+          <div className="w-7 h-7 mb-2" />
+        )}
+        <a
+          href={`${prefix}/`}
+          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+          title="Mail"
+        >
+          <Mail className="w-[18px] h-[18px]" />
+        </a>
+        <a
+          href={`${prefix}/calendar`}
+          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+          title="Calendar"
+        >
+          <Calendar className="w-[18px] h-[18px]" />
+        </a>
+        <a
+          href={`${prefix}/contacts`}
+          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+          title="Contacts"
+        >
+          <BookUser className="w-[18px] h-[18px]" />
+        </a>
+        {filesEnabled && (
+          <a
+            href={`${prefix}/files`}
+            className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+            title="Files"
+          >
+            <HardDrive className="w-[18px] h-[18px]" />
+          </a>
+        )}
+        <div className="mt-auto flex flex-col items-center gap-2">
+          <div className="flex items-center justify-center w-10 h-10 rounded-md bg-primary/10 text-primary" title="Admin">
+            <Shield className="w-[18px] h-[18px]" />
+          </div>
+          <a
+            href={`${prefix}/settings`}
+            className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+            title="Settings"
+          >
+            <Settings className="w-[18px] h-[18px]" />
+          </a>
+        </div>
+      </nav>
+
+      {/* Admin Sidebar (desktop only) */}
+      <aside className="hidden md:flex w-60 border-r border-border bg-secondary flex-col sticky top-0 h-screen">
+        <div className="h-14 flex items-center px-4 border-b border-border shrink-0">
+          {logoUrl ? (
+            <img src={logoUrl} alt="" className="w-5 h-5 object-contain mr-2" />
+          ) : (
+            <Shield className="w-5 h-5 text-primary mr-2" />
+          )}
+          <span className="font-semibold text-sm text-foreground">Admin Panel</span>
+        </div>
+        {navContent}
+      </aside>
+
+      {/* Mobile drawer overlay */}
+      {mobileNavOpen && (
+        <div
+          className="md:hidden fixed inset-0 z-40 bg-black/50 backdrop-blur-sm"
+          onClick={() => setMobileNavOpen(false)}
+          aria-hidden="true"
+        />
+      )}
+
+      {/* Mobile drawer */}
+      <aside
+        className={cn(
+          'md:hidden fixed inset-y-0 left-0 z-50 w-72 max-w-[85vw] border-r border-border bg-secondary flex flex-col transition-transform duration-200 ease-out',
+          mobileNavOpen ? 'translate-x-0' : '-translate-x-full'
+        )}
+        aria-label="Admin navigation"
+        aria-hidden={!mobileNavOpen}
+      >
+        <div className="h-14 flex items-center justify-between px-3 border-b border-border shrink-0">
+          <div className="flex items-center min-w-0">
+            {logoUrl ? (
+              <img src={logoUrl} alt="" className="w-5 h-5 object-contain mr-2" />
+            ) : (
+              <Shield className="w-5 h-5 text-primary mr-2" />
+            )}
+            <span className="font-semibold text-sm text-foreground truncate">Admin Panel</span>
+          </div>
+          <button
+            type="button"
+            onClick={() => setMobileNavOpen(false)}
+            className="flex items-center justify-center w-9 h-9 rounded-md text-muted-foreground hover:text-foreground hover:bg-muted transition-colors"
+            aria-label="Close navigation"
+          >
+            <X className="w-5 h-5" />
+          </button>
+        </div>
+        {navContent}
+      </aside>
+
+      {/* Main content */}
+      <main className="flex-1 min-w-0 overflow-x-hidden">
+        {/* Mobile header */}
+        <div className="md:hidden sticky top-0 z-30 h-14 flex items-center gap-2 px-3 border-b border-border bg-background">
+          <button
+            type="button"
+            onClick={() => setMobileNavOpen(true)}
+            className="flex items-center justify-center w-9 h-9 rounded-md text-foreground hover:bg-muted transition-colors"
+            aria-label="Open navigation"
+          >
+            <Menu className="w-5 h-5" />
+          </button>
+          <div className="flex items-center min-w-0">
+            {logoUrl ? (
+              <img src={logoUrl} alt="" className="w-5 h-5 object-contain mr-2" />
+            ) : (
+              <Shield className="w-5 h-5 text-primary mr-2" />
+            )}
+            <span className="font-semibold text-sm text-foreground truncate">Admin Panel</span>
+          </div>
+        </div>
+
+        <div className="max-w-4xl mx-auto p-4 md:p-6 pb-[calc(4rem+env(safe-area-inset-bottom))] md:pb-6">
+          {authError ? (
+            <div className="rounded-lg border border-destructive/40 bg-destructive/10 p-4 text-sm text-destructive">
+              <p className="font-medium">Admin authentication failed</p>
+              <p className="mt-1 text-destructive/80">{authError}</p>
+            </div>
+          ) : authenticated === null ? (
+            <div className="py-12 text-center text-sm text-muted-foreground animate-pulse">
+              Loading admin panel…
+            </div>
+          ) : authenticated ? (
+            children
+          ) : null}
+        </div>
+      </main>
+
+      {/* Mobile bottom nav (main webmail nav) */}
+      <nav
+        className="md:hidden fixed inset-x-0 bottom-0 z-30 flex items-center bg-background border-t border-border pb-[env(safe-area-inset-bottom)]"
+        aria-label="Main navigation"
+      >
+        <a
+          href={`${prefix}/`}
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+          title="Mail"
+        >
+          <Mail className="w-5 h-5" />
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Mail</span>
+        </a>
+        <a
+          href={`${prefix}/calendar`}
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+          title="Calendar"
+        >
+          <Calendar className="w-5 h-5" />
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Calendar</span>
+        </a>
+        <a
+          href={`${prefix}/contacts`}
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+          title="Contacts"
+        >
+          <BookUser className="w-5 h-5" />
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Contacts</span>
+        </a>
+        {filesEnabled && (
+          <a
+            href={`${prefix}/files`}
+            className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+            title="Files"
+          >
+            <HardDrive className="w-5 h-5" />
+            <span className="text-[10px] font-medium leading-tight truncate max-w-full">Files</span>
+          </a>
+        )}
+        <div
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] text-primary"
+          title="Admin"
+          aria-current="page"
+        >
+          <div className="relative">
+            <Shield className="w-5 h-5" />
+            <span className="absolute -bottom-1 left-1/2 -translate-x-1/2 w-4 h-0.5 rounded-full bg-primary" />
+          </div>
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Admin</span>
+        </div>
+        <a
+          href={`${prefix}/settings`}
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+          title="Settings"
+        >
+          <Settings className="w-5 h-5" />
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Settings</span>
+        </a>
+      </nav>
+    </div>
+  );
+}

app/(main)/admin/login/page.tsx

@@ -0,0 +1,96 @@
+'use client';
+
+import { useState, type FormEvent } from 'react';
+import { useRouter } from 'next/navigation';
+import { Shield } from 'lucide-react';
+import { useConfig } from '@/hooks/use-config';
+import { useThemeStore } from '@/stores/theme-store';
+import { apiFetch } from '@/lib/browser-navigation';
+
+export default function AdminLoginPage() {
+  const router = useRouter();
+  const [password, setPassword] = useState('');
+  const [error, setError] = useState('');
+  const [loading, setLoading] = useState(false);
+  const { loginLogoLightUrl, loginLogoDarkUrl } = useConfig();
+  const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
+  const logoUrl = resolvedTheme === 'dark' ? loginLogoDarkUrl : loginLogoLightUrl;
+
+  async function handleSubmit(e: FormEvent) {
+    e.preventDefault();
+    setError('');
+    setLoading(true);
+
+    try {
+      const res = await apiFetch('/api/admin/auth', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ password }),
+      });
+
+      const data = await res.json();
+
+      if (!res.ok) {
+        setError(data.error || 'Login failed');
+        return;
+      }
+
+      router.push('/admin');
+    } catch {
+      setError('Network error. Please try again.');
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  return (
+    <div className="min-h-screen flex items-center justify-center bg-background px-4">
+      <div className="w-full max-w-sm">
+        <div className="flex flex-col items-center mb-8">
+          {logoUrl ? (
+            <img src={logoUrl} alt="" className="h-12 object-contain mb-4" />
+          ) : (
+            <div className="w-12 h-12 rounded-xl bg-primary/10 flex items-center justify-center mb-4">
+              <Shield className="w-6 h-6 text-primary" />
+            </div>
+          )}
+          <h1 className="text-xl font-semibold text-foreground">Admin Dashboard</h1>
+          <p className="text-sm text-muted-foreground mt-1">Enter your admin password to continue</p>
+        </div>
+
+        <form onSubmit={handleSubmit} className="space-y-4">
+          <div>
+            <label htmlFor="password" className="block text-sm font-medium text-foreground mb-1.5">
+              Password
+            </label>
+            <input
+              id="password"
+              type="password"
+              value={password}
+              onChange={(e) => setPassword(e.target.value)}
+              className="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm text-foreground transition-all duration-200 placeholder:text-muted-foreground hover:border-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:border-ring"
+              placeholder="Enter admin password"
+              required
+              autoFocus
+              autoComplete="current-password"
+            />
+          </div>
+
+          {error && (
+            <div className="text-sm text-destructive bg-destructive/10 rounded-md px-3 py-2">
+              {error}
+            </div>
+          )}
+
+          <button
+            type="submit"
+            disabled={loading || !password}
+            className="w-full h-10 rounded-md bg-primary text-primary-foreground font-medium text-sm hover:bg-primary/90 disabled:opacity-50 disabled:pointer-events-none transition-all duration-200 shadow-sm"
+          >
+            {loading ? 'Signing in...' : 'Sign in'}
+          </button>
+        </form>
+      </div>
+    </div>
+  );
+}

app/(main)/admin/logs/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=logs');
+}

app/(main)/admin/marketplace/[slug]/page.tsx

@@ -0,0 +1,620 @@
+'use client';
+
+import { useEffect, useState, useCallback } from 'react';
+import { useParams } from 'next/navigation';
+import Link from 'next/link';
+import {
+  ArrowLeft,
+  ArrowUpCircle,
+  Download,
+  Loader2,
+  Puzzle,
+  SwatchBook,
+  Star,
+  Trash2,
+  Check,
+  Settings as SettingsIcon,
+  ExternalLink,
+  Shield,
+  AlertTriangle,
+  FileCode,
+  ChevronDown,
+  ChevronUp,
+} from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+import { compareVersions, isVersionSatisfied } from '@/lib/version-compare';
+
+const CURRENT_APP_VERSION = process.env.NEXT_PUBLIC_APP_VERSION || '0.0.0';
+
+interface PreviewData {
+  extension: {
+    slug: string;
+    name: string;
+    type: 'plugin' | 'theme';
+    pluginType: string | null;
+    description: string;
+    longDescription: string | null;
+    tags: string[];
+    permissions: string[];
+    totalDownloads: number;
+    featured: boolean;
+    githubRepo: string | null;
+    license: string | null;
+    minAppVersion: string | null;
+    iconUrl: string | null;
+    bannerUrl: string | null;
+    author: {
+      displayName: string;
+      githubLogin: string;
+      avatarUrl: string | null;
+      verified?: boolean;
+    } | null;
+    latestVersion: string | null;
+    versions: Array<{
+      version: string;
+      changelog: string | null;
+      bundleSize: number;
+      minAppVersion: string | null;
+      publishedAt: string | null;
+      permissions: string[];
+    }>;
+    screenshots: Array<{ url: string; altText: string | null }>;
+    themePreviews: Array<{
+      variant: 'light' | 'dark';
+      previewPath: string;
+      colors: Record<string, string> | null;
+    }>;
+    createdAt: string | null;
+    updatedAt: string | null;
+  };
+  bundle: {
+    manifest: Record<string, unknown> | null;
+    source: { name: string; content: string; truncated: boolean } | null;
+    size: number;
+    error: string | null;
+  };
+  installed: boolean;
+  installedVersion: string | null;
+}
+
+const RISKY_PERMISSIONS = new Set([
+  'mail:write',
+  'mail:delete',
+  'storage:write',
+  'network',
+  'admin',
+]);
+
+export default function MarketplacePreviewPage() {
+  const params = useParams();
+  const slug = params.slug as string;
+
+  const [data, setData] = useState<PreviewData | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [installing, setInstalling] = useState(false);
+  const [uninstalling, setUninstalling] = useState(false);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const [showSource, setShowSource] = useState(false);
+  const [showManifest, setShowManifest] = useState(false);
+
+  const fetchPreview = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      const res = await apiFetch(`/api/admin/marketplace/${encodeURIComponent(slug)}`);
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}));
+        setError(body.error || 'Failed to load preview');
+        return;
+      }
+      setData(await res.json());
+    } catch {
+      setError('Failed to connect to extension directory');
+    } finally {
+      setLoading(false);
+    }
+  }, [slug]);
+
+  useEffect(() => { fetchPreview(); }, [fetchPreview]);
+
+  async function handleInstall() {
+    if (!data) return;
+    const isUpdate = data.installed;
+    const targetVersion = data.extension.latestVersion || '1.0.0';
+    setInstalling(true);
+    setMessage(null);
+    try {
+      const res = await apiFetch('/api/admin/marketplace', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          slug: data.extension.slug,
+          version: targetVersion,
+          type: data.extension.type,
+        }),
+      });
+      const body = await res.json();
+      if (res.ok) {
+        const warnings = body.warnings?.length ? ` (${body.warnings.length} warning(s))` : '';
+        setMessage({
+          type: 'success',
+          text: isUpdate
+            ? `"${data.extension.name}" updated to v${targetVersion}${warnings}`
+            : `"${data.extension.name}" installed${warnings}`,
+        });
+        setData(prev => prev ? { ...prev, installed: true, installedVersion: targetVersion } : prev);
+      } else {
+        setMessage({ type: 'error', text: body.error || (isUpdate ? 'Update failed' : 'Installation failed') });
+      }
+    } catch {
+      setMessage({ type: 'error', text: isUpdate ? 'Update failed - network error' : 'Installation failed - network error' });
+    } finally {
+      setInstalling(false);
+    }
+  }
+
+  async function handleUninstall() {
+    if (!data) return;
+    if (!confirm(`Remove "${data.extension.name}"? This cannot be undone.`)) return;
+
+    setUninstalling(true);
+    setMessage(null);
+    try {
+      const endpoint = data.extension.type === 'theme'
+        ? '/api/admin/themes'
+        : '/api/admin/plugins';
+      const res = await apiFetch(endpoint, {
+        method: 'DELETE',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ id: data.extension.slug }),
+      });
+      const body = await res.json().catch(() => ({}));
+      if (res.ok) {
+        setMessage({ type: 'success', text: `"${data.extension.name}" removed` });
+        setData(prev => prev ? { ...prev, installed: false } : prev);
+      } else {
+        setMessage({ type: 'error', text: body.error || 'Uninstall failed' });
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Uninstall failed - network error' });
+    } finally {
+      setUninstalling(false);
+    }
+  }
+
+  if (loading) {
+    return (
+      <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">
+        <Loader2 className="w-4 h-4 animate-spin mr-2" />
+        Loading...
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="space-y-4">
+        <Link
+          href="/admin/marketplace"
+          className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+        >
+          <ArrowLeft className="w-4 h-4" /> Back to Marketplace
+        </Link>
+        <p className="text-sm text-destructive">{error || 'Extension not found'}</p>
+      </div>
+    );
+  }
+
+  const ext = data.extension;
+  const bundle = data.bundle;
+  const isPlugin = ext.type === 'plugin';
+  const manifestPerms = (bundle.manifest?.permissions as string[] | undefined) || ext.permissions || [];
+  const frameOrigins = (bundle.manifest?.frameOrigins as string[] | undefined) || [];
+  const settingsSchema = bundle.manifest?.settingsSchema as Record<string, { type: string; label: string; description?: string; default?: unknown }> | undefined;
+  const versionMismatch = !!ext.minAppVersion && !isVersionSatisfied(CURRENT_APP_VERSION, ext.minAppVersion);
+  const updateAvailable = data.installed
+    && !!data.installedVersion
+    && !!ext.latestVersion
+    && compareVersions(ext.latestVersion, data.installedVersion) > 0
+    && !versionMismatch;
+
+  return (
+    <div className="space-y-6 max-w-4xl">
+      {/* Back link */}
+      <Link
+        href="/admin/marketplace"
+        className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+      >
+        <ArrowLeft className="w-4 h-4" /> Back to Marketplace
+      </Link>
+
+      {/* Banner / hero */}
+      {ext.bannerUrl && (
+        <div className="mb-6 overflow-hidden rounded-lg border border-border bg-muted">
+          <img
+            src={ext.bannerUrl}
+            alt=""
+            className="block w-full max-h-64 object-cover"
+            loading="lazy"
+          />
+        </div>
+      )}
+
+      {/* Header */}
+      <div className="flex flex-col gap-4 sm:flex-row sm:items-start">
+        <div className="flex items-start gap-4 flex-1 min-w-0">
+          <div className="w-14 h-14 rounded-lg bg-muted flex items-center justify-center shrink-0 overflow-hidden">
+            {ext.iconUrl ? (
+              <img
+                src={ext.iconUrl}
+                alt=""
+                className="w-14 h-14 object-cover"
+                loading="lazy"
+              />
+            ) : isPlugin ? (
+              <Puzzle className="w-7 h-7 text-muted-foreground" />
+            ) : (
+              <SwatchBook className="w-7 h-7 text-muted-foreground" />
+            )}
+          </div>
+          <div className="flex-1 min-w-0">
+            <div className="flex flex-wrap items-center gap-x-2 gap-y-1">
+              <h1 className="text-2xl font-semibold text-foreground break-words min-w-0">{ext.name}</h1>
+              {ext.featured && <Star className="w-4 h-4 text-warning fill-warning shrink-0" />}
+              {data.installed && !updateAvailable && (
+                <span
+                  className="inline-flex items-center gap-1 text-xs px-2 py-0.5 rounded-md bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 font-medium"
+                  title={data.installedVersion ? `Installed: v${data.installedVersion}` : undefined}
+                >
+                  <Check className="w-3 h-3" /> Installed
+                </span>
+              )}
+              {data.installed && updateAvailable && (
+                <span
+                  className="inline-flex items-center gap-1 text-xs px-2 py-0.5 rounded-md bg-blue-100 text-blue-700 dark:bg-blue-950/30 dark:text-blue-400 font-medium"
+                  title={`Installed v${data.installedVersion} → v${ext.latestVersion} available`}
+                >
+                  <ArrowUpCircle className="w-3 h-3" /> Update available
+                </span>
+              )}
+            </div>
+            <div className="flex items-center gap-2 mt-1 text-sm text-muted-foreground flex-wrap">
+              <span className={`text-[10px] px-1.5 py-0.5 rounded font-medium ${
+                isPlugin
+                  ? 'bg-blue-100 text-blue-700 dark:bg-blue-950/30 dark:text-blue-400'
+                  : 'bg-purple-100 text-purple-700 dark:bg-purple-950/30 dark:text-purple-400'
+              }`}>
+                {isPlugin ? (ext.pluginType || 'plugin') : 'theme'}
+              </span>
+              {ext.author && (
+                <span>by {ext.author.displayName}</span>
+              )}
+              {ext.latestVersion && <span>v{ext.latestVersion}</span>}
+              {ext.license && <span>{ext.license}</span>}
+              <span className="inline-flex items-center gap-1">
+                <Download className="w-3 h-3" />
+                {ext.totalDownloads.toLocaleString()}
+              </span>
+            </div>
+          </div>
+        </div>
+
+        {/* Action buttons */}
+        <div className="flex flex-wrap items-center gap-2 shrink-0">
+          {data.installed ? (
+            <>
+              {updateAvailable && (
+                <button
+                  onClick={handleInstall}
+                  disabled={installing || !!bundle.error}
+                  title={`Update from v${data.installedVersion} to v${ext.latestVersion}`}
+                  className="inline-flex items-center gap-1.5 h-9 px-4 rounded-md bg-blue-600 text-white text-sm font-medium hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
+                >
+                  {installing ? <Loader2 className="w-4 h-4 animate-spin" /> : <ArrowUpCircle className="w-4 h-4" />}
+                  Update to v{ext.latestVersion}
+                </button>
+              )}
+              <Link
+                href={isPlugin ? `/admin/plugins/${ext.slug}` : '/admin/themes'}
+                className="inline-flex items-center gap-1.5 h-9 px-3 rounded-md border border-border text-sm font-medium text-foreground hover:bg-muted transition-colors"
+              >
+                <SettingsIcon className="w-4 h-4" />
+                Manage
+              </Link>
+              <button
+                onClick={handleUninstall}
+                disabled={uninstalling}
+                className="inline-flex items-center gap-1.5 h-9 px-3 rounded-md bg-destructive text-destructive-foreground text-sm font-medium hover:bg-destructive/90 disabled:opacity-50 transition-colors"
+              >
+                {uninstalling ? <Loader2 className="w-4 h-4 animate-spin" /> : <Trash2 className="w-4 h-4" />}
+                Uninstall
+              </button>
+            </>
+          ) : (
+            <button
+              onClick={handleInstall}
+              disabled={installing || !!bundle.error || versionMismatch}
+              title={versionMismatch
+                ? `Requires app v${ext.minAppVersion}+. You are running v${CURRENT_APP_VERSION}. Update Bulwark to install.`
+                : undefined}
+              className="inline-flex items-center gap-1.5 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
+            >
+              {installing ? <Loader2 className="w-4 h-4 animate-spin" /> : <Download className="w-4 h-4" />}
+              Install
+            </button>
+          )}
+        </div>
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      {versionMismatch && (
+        <div className="flex items-start gap-2 text-sm rounded-md px-3 py-2 bg-amber-50 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300">
+          <AlertTriangle className="w-4 h-4 shrink-0 mt-0.5" />
+          <div>
+            <p className="font-medium">Update Bulwark to install this extension</p>
+            <p className="text-xs mt-0.5 opacity-90">
+              Requires app v{ext.minAppVersion}+. You are running v{CURRENT_APP_VERSION}.
+            </p>
+          </div>
+        </div>
+      )}
+
+      {bundle.error && (
+        <div className="flex items-start gap-2 text-sm rounded-md px-3 py-2 bg-amber-50 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300">
+          <AlertTriangle className="w-4 h-4 shrink-0 mt-0.5" />
+          <div>
+            <p className="font-medium">Could not preview bundle</p>
+            <p className="text-xs mt-0.5 opacity-90">{bundle.error}</p>
+          </div>
+        </div>
+      )}
+
+      {/* Description */}
+      <section className="border border-border rounded-lg p-4">
+        <h2 className="text-sm font-medium text-foreground">About</h2>
+        <p className="text-sm text-muted-foreground mt-2">{ext.description}</p>
+        {ext.longDescription && ext.longDescription !== ext.description && (
+          <p className="text-sm text-muted-foreground mt-3 whitespace-pre-wrap">{ext.longDescription}</p>
+        )}
+        {ext.tags.length > 0 && (
+          <div className="flex flex-wrap gap-1 mt-3">
+            {ext.tags.map(tag => (
+              <span key={tag} className="text-[10px] px-1.5 py-0.5 rounded bg-muted text-muted-foreground">
+                {tag}
+              </span>
+            ))}
+          </div>
+        )}
+        <div className="flex items-center gap-3 text-xs text-muted-foreground mt-4 pt-3 border-t border-border flex-wrap">
+          {ext.minAppVersion && <span>Requires app v{ext.minAppVersion}+</span>}
+          {bundle.size > 0 && <span>Bundle: {(bundle.size / 1024).toFixed(1)} KB</span>}
+          {ext.githubRepo && (
+            <a
+              href={`https://github.com/${ext.githubRepo}`}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="inline-flex items-center gap-1 hover:text-foreground"
+            >
+              <ExternalLink className="w-3 h-3" />
+              {ext.githubRepo}
+            </a>
+          )}
+        </div>
+      </section>
+
+      {/* Screenshots */}
+      {ext.screenshots.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Screenshots</h2>
+          <div className="grid grid-cols-1 sm:grid-cols-2 gap-3 mt-3">
+            {ext.screenshots.map((s, i) => (
+              <img
+                key={i}
+                src={s.url}
+                alt={s.altText || `Screenshot ${i + 1}`}
+                className="w-full rounded-md border border-border bg-muted"
+                loading="lazy"
+              />
+            ))}
+          </div>
+        </section>
+      )}
+
+      {/* Theme color preview */}
+      {!isPlugin && ext.themePreviews.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Theme preview</h2>
+          <div className="grid grid-cols-1 sm:grid-cols-2 gap-3 mt-3">
+            {ext.themePreviews.map(preview => (
+              <ThemeColorSwatch key={preview.variant} preview={preview} />
+            ))}
+          </div>
+        </section>
+      )}
+
+      {/* Permissions */}
+      {isPlugin && (
+        <section className="border border-border rounded-lg p-4">
+          <div className="flex items-center gap-2">
+            <Shield className="w-4 h-4 text-muted-foreground" />
+            <h2 className="text-sm font-medium text-foreground">Permissions</h2>
+          </div>
+          {manifestPerms.length === 0 ? (
+            <p className="text-sm text-muted-foreground mt-2">This plugin requests no permissions.</p>
+          ) : (
+            <ul className="mt-3 space-y-1.5">
+              {manifestPerms.map(perm => {
+                const risky = RISKY_PERMISSIONS.has(perm);
+                return (
+                  <li
+                    key={perm}
+                    className={`flex items-center gap-2 text-sm rounded-md px-2 py-1 ${
+                      risky
+                        ? 'bg-amber-50 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300'
+                        : 'bg-muted/50 text-foreground'
+                    }`}
+                  >
+                    {risky && <AlertTriangle className="w-3.5 h-3.5 shrink-0" />}
+                    <code className="font-mono text-xs">{perm}</code>
+                  </li>
+                );
+              })}
+            </ul>
+          )}
+          {frameOrigins.length > 0 && (
+            <div className="mt-4 pt-3 border-t border-border">
+              <h3 className="text-xs font-medium text-foreground">Iframe origins</h3>
+              <p className="text-xs text-muted-foreground mt-0.5">
+                The plugin will be allowed to embed content from these origins.
+              </p>
+              <ul className="mt-2 space-y-1">
+                {frameOrigins.map(origin => (
+                  <li key={origin} className="text-xs font-mono text-foreground bg-muted/50 px-2 py-1 rounded">
+                    {origin}
+                  </li>
+                ))}
+              </ul>
+            </div>
+          )}
+        </section>
+      )}
+
+      {/* Settings schema preview */}
+      {isPlugin && settingsSchema && Object.keys(settingsSchema).length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">User settings</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Settings users will be able to configure after install.</p>
+          <ul className="mt-3 divide-y divide-border">
+            {Object.entries(settingsSchema).map(([key, field]) => (
+              <li key={key} className="py-2">
+                <div className="flex items-center gap-2">
+                  <code className="text-xs font-mono text-foreground">{key}</code>
+                  <span className="text-[10px] px-1.5 py-0.5 rounded bg-muted text-muted-foreground">{field.type}</span>
+                </div>
+                <div className="text-sm text-foreground mt-0.5">{field.label}</div>
+                {field.description && (
+                  <div className="text-xs text-muted-foreground mt-0.5">{field.description}</div>
+                )}
+              </li>
+            ))}
+          </ul>
+        </section>
+      )}
+
+      {/* Source / manifest disclosure */}
+      {bundle.manifest && (
+        <section className="border border-border rounded-lg">
+          <button
+            onClick={() => setShowManifest(v => !v)}
+            className="w-full flex items-center justify-between gap-2 px-4 py-3 text-left hover:bg-muted/30 transition-colors"
+          >
+            <div className="flex items-center gap-2">
+              <FileCode className="w-4 h-4 text-muted-foreground" />
+              <h2 className="text-sm font-medium text-foreground">manifest.json</h2>
+            </div>
+            {showManifest ? <ChevronUp className="w-4 h-4 text-muted-foreground" /> : <ChevronDown className="w-4 h-4 text-muted-foreground" />}
+          </button>
+          {showManifest && (
+            <pre className="px-4 pb-4 text-xs font-mono overflow-x-auto text-foreground whitespace-pre">
+              {JSON.stringify(bundle.manifest, null, 2)}
+            </pre>
+          )}
+        </section>
+      )}
+
+      {bundle.source && (
+        <section className="border border-border rounded-lg">
+          <button
+            onClick={() => setShowSource(v => !v)}
+            className="w-full flex items-center justify-between gap-2 px-4 py-3 text-left hover:bg-muted/30 transition-colors"
+          >
+            <div className="flex items-center gap-2">
+              <FileCode className="w-4 h-4 text-muted-foreground" />
+              <h2 className="text-sm font-medium text-foreground">{bundle.source.name}</h2>
+              {bundle.source.truncated && (
+                <span className="text-[10px] px-1.5 py-0.5 rounded bg-amber-100 text-amber-700 dark:bg-amber-950/30 dark:text-amber-400">truncated</span>
+              )}
+            </div>
+            {showSource ? <ChevronUp className="w-4 h-4 text-muted-foreground" /> : <ChevronDown className="w-4 h-4 text-muted-foreground" />}
+          </button>
+          {showSource && (
+            <pre className="px-4 pb-4 text-xs font-mono overflow-x-auto text-foreground whitespace-pre max-h-[600px] overflow-y-auto">
+              {bundle.source.content}
+            </pre>
+          )}
+        </section>
+      )}
+
+      {/* Version history */}
+      {ext.versions.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Version history</h2>
+          <ul className="mt-3 divide-y divide-border">
+            {ext.versions.slice(0, 5).map(v => (
+              <li key={v.version} className="py-2 flex items-start justify-between gap-3">
+                <div className="min-w-0 flex-1">
+                  <div className="flex items-center gap-2">
+                    <code className="text-xs font-mono text-foreground">v{v.version}</code>
+                    {v.publishedAt && (
+                      <span className="text-xs text-muted-foreground">
+                        {new Date(v.publishedAt).toLocaleDateString()}
+                      </span>
+                    )}
+                  </div>
+                  {v.changelog && (
+                    <p className="text-xs text-muted-foreground mt-0.5 whitespace-pre-wrap">{v.changelog}</p>
+                  )}
+                </div>
+                <span className="text-xs text-muted-foreground shrink-0">
+                  {(v.bundleSize / 1024).toFixed(1)} KB
+                </span>
+              </li>
+            ))}
+          </ul>
+        </section>
+      )}
+    </div>
+  );
+}
+
+function ThemeColorSwatch({ preview }: { preview: { variant: 'light' | 'dark'; colors: Record<string, string> | null } }) {
+  const colors = preview.colors || {};
+  const bg = colors.background || (preview.variant === 'dark' ? '#0f0f10' : '#ffffff');
+  const fg = colors.foreground || (preview.variant === 'dark' ? '#fafafa' : '#0a0a0a');
+  const accent = colors.primary || colors.accent || '#7c5cff';
+  const muted = colors.muted || (preview.variant === 'dark' ? '#1a1a1c' : '#f5f5f5');
+  const border = colors.border || (preview.variant === 'dark' ? '#27272a' : '#e5e5e5');
+
+  return (
+    <div className="rounded-md border border-border overflow-hidden">
+      <div className="px-3 py-2 text-xs font-medium text-muted-foreground bg-muted/30 border-b border-border capitalize">
+        {preview.variant}
+      </div>
+      <div className="p-3 space-y-2" style={{ background: bg, color: fg }}>
+        <div className="flex items-center gap-2">
+          <span className="inline-block w-6 h-6 rounded" style={{ background: accent }} />
+          <span className="text-sm font-medium" style={{ color: fg }}>Sample text</span>
+        </div>
+        <div className="rounded p-2 text-xs" style={{ background: muted, border: `1px solid ${border}` }}>
+          <span style={{ color: fg }}>Card surface</span>
+        </div>
+        <div className="flex flex-wrap gap-1">
+          {Object.entries(colors).slice(0, 6).map(([key, value]) => (
+            <span
+              key={key}
+              title={`${key}: ${value}`}
+              className="inline-block w-4 h-4 rounded border"
+              style={{ background: value, borderColor: border }}
+            />
+          ))}
+        </div>
+      </div>
+    </div>
+  );
+}

app/(main)/admin/marketplace/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=marketplace');
+}

app/(main)/admin/page.tsx

@@ -0,0 +1,49 @@
+'use client';
+
+import { useEffect } from 'react';
+import { useAdminTabStore, isAdminTab } from '@/stores/admin-tab-store';
+import { DashboardTab } from './_tabs/dashboard';
+import { SettingsTab } from './_tabs/settings';
+import { BrandingTab } from './_tabs/branding';
+import { AuthTab } from './_tabs/auth';
+import { PolicyTab } from './_tabs/policy';
+import { PluginsTab } from './_tabs/plugins';
+import { ThemesTab } from './_tabs/themes';
+import { MarketplaceTab } from './_tabs/marketplace';
+import { VersionTab } from './_tabs/version';
+import { TelemetryTab } from './_tabs/telemetry';
+import { LogsTab } from './_tabs/logs';
+
+export default function AdminPage() {
+  const activeTab = useAdminTabStore((s) => s.activeTab);
+  const setActiveTab = useAdminTabStore((s) => s.setActiveTab);
+
+  // Honour deep links from the old route structure: /admin?tab=settings
+  // (emitted by the redirect pages in /admin/<x>/page.tsx) sets the store
+  // once on mount, then strips the param so the URL stays at /admin and
+  // subsequent tab clicks don't accumulate query strings.
+  useEffect(() => {
+    if (typeof window === 'undefined') return;
+    const url = new URL(window.location.href);
+    const fromUrl = url.searchParams.get('tab');
+    if (isAdminTab(fromUrl)) {
+      setActiveTab(fromUrl);
+      url.searchParams.delete('tab');
+      window.history.replaceState(null, '', url.pathname + url.search + url.hash);
+    }
+  }, [setActiveTab]);
+
+  switch (activeTab) {
+    case 'dashboard': return <DashboardTab />;
+    case 'settings': return <SettingsTab />;
+    case 'branding': return <BrandingTab />;
+    case 'auth': return <AuthTab />;
+    case 'policy': return <PolicyTab />;
+    case 'plugins': return <PluginsTab />;
+    case 'themes': return <ThemesTab />;
+    case 'marketplace': return <MarketplaceTab />;
+    case 'version': return <VersionTab />;
+    case 'telemetry': return <TelemetryTab />;
+    case 'logs': return <LogsTab />;
+  }
+}

app/(main)/admin/plugins/[id]/page.tsx

@@ -0,0 +1,7 @@
+import { redirect } from 'next/navigation';
+
+// Inline panel handles plugin config now - see _tabs/plugin-config-panel.tsx.
+// Old deep links land on the plugins tab; the user clicks the gear again.
+export default function Page() {
+  redirect('/admin?tab=plugins');
+}

app/(main)/admin/plugins/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=plugins');
+}

app/(main)/admin/policy/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=policy');
+}

app/(main)/admin/settings/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=settings');
+}

app/(main)/admin/telemetry/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=telemetry');
+}

app/(main)/admin/themes/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=themes');
+}

app/(main)/admin/version/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=version');
+}

app/(main)/layout.tsx

@@ -1,8 +1,11 @@
-import type { Metadata } from "next";
+import type { Metadata, Viewport } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
 import { headers } from "next/headers";
 import { getLocale } from "next-intl/server";
-import "./globals.css";
+import { PWAInstallPrompt } from "@/components/pwa-install-prompt";
+import { ServiceWorkerRegistration } from "@/components/service-worker-registration";
+import { configManager } from "@/lib/admin/config-manager";
+import "../globals.css";
 
 const geistSans = Geist({
   variable: "--font-geist-sans",
@@ -14,13 +17,28 @@ const geistMono = Geist_Mono({
   subsets: ["latin"],
 });
 
+export const viewport: Viewport = {
+  width: "device-width",
+  initialScale: 1,
+  viewportFit: "cover",
+};
+
 export async function generateMetadata(): Promise<Metadata> {
-  const faviconUrl = process.env.FAVICON_URL;
+  await configManager.ensureLoaded();
+  const faviconUrl = configManager.get<string>("faviconUrl", "/branding/Bulwark_Favicon.svg");
 
   return {
     title: process.env.APP_NAME || process.env.NEXT_PUBLIC_APP_NAME || "Webmail",
     description: "Minimalist webmail client using JMAP protocol",
-    ...(faviconUrl ? { icons: { icon: faviconUrl } } : {}),
+    appleWebApp: {
+      capable: true,
+      statusBarStyle: "black-translucent",
+      title: process.env.APP_NAME || process.env.NEXT_PUBLIC_APP_NAME || "Webmail",
+    },
+    formatDetection: {
+      telephone: false,
+    },
+    icons: { icon: faviconUrl },
   };
 }
 
@@ -31,10 +49,22 @@ export default async function RootLayout({
 }) {
   const locale = await getLocale();
   const nonce = (await headers()).get("x-nonce") ?? "";
+  const parentOrigin = process.env.NEXT_PUBLIC_PARENT_ORIGIN || "";
 
   return (
     <html lang={locale} suppressHydrationWarning>
       <head>
+        <meta name="theme-color" content="#ffffff" />
+        <meta name="mobile-web-app-capable" content="yes" />
+        <meta name="apple-mobile-web-app-capable" content="yes" />
+        <meta
+          name="apple-mobile-web-app-title"
+          content={process.env.APP_NAME || process.env.NEXT_PUBLIC_APP_NAME || "Webmail"}
+        />
+        <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
+        {parentOrigin && (
+          <meta name="parent-origin" content={parentOrigin} />
+        )}
         <script
           nonce={nonce}
           suppressHydrationWarning
@@ -59,7 +89,9 @@ export default async function RootLayout({
       <body
         className={`${geistSans.variable} ${geistMono.variable} antialiased`}
       >
+        <ServiceWorkerRegistration />
         {children}
+        <PWAInstallPrompt />
       </body>
     </html>
   );

app/(main)/not-found.tsx

@@ -0,0 +1,49 @@
+"use client";
+
+import { useEffect } from "react";
+import { useAuthStore } from "@/stores/auth-store";
+import { getPathPrefix } from "@/lib/browser-navigation";
+
+export default function NotFound() {
+  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
+
+  useEffect(() => {
+    if (!isAuthenticated) {
+      const prefix = getPathPrefix();
+      // Don't redirect admin routes to the webmail login page. Admin paths
+      // are mounted relative to the deployment prefix, so account for it.
+      const adminBase = `${prefix}/admin`;
+      const isAdminRoute = window.location.pathname === adminBase || window.location.pathname.startsWith(`${adminBase}/`);
+      if (!isAdminRoute) {
+        window.location.href = `${prefix}/login`;
+      }
+    }
+  }, [isAuthenticated]);
+
+  if (!isAuthenticated) {
+    let isAdmin = false;
+    if (typeof window !== 'undefined') {
+      const prefix = getPathPrefix();
+      const adminBase = `${prefix}/admin`;
+      isAdmin = window.location.pathname === adminBase || window.location.pathname.startsWith(`${adminBase}/`);
+    }
+    if (!isAdmin) return null;
+  }
+
+  const prefix = typeof window !== 'undefined' ? getPathPrefix() : '';
+
+  return (
+    <div className="min-h-screen flex items-center justify-center bg-background">
+      <div className="text-center max-w-md px-4">
+        <h1 className="text-4xl font-bold text-foreground mb-2">404</h1>
+        <p className="text-muted-foreground mb-6">This page could not be found.</p>
+        <a
+          href={`${prefix}/`}
+          className="inline-flex items-center px-4 py-2 bg-primary text-primary-foreground rounded-lg hover:opacity-90 transition-opacity"
+        >
+          Go home
+        </a>
+      </div>
+    </div>
+  );
+}

app/(main)/protocol/mailto/page.tsx

@@ -0,0 +1,8 @@
+import { getTranslations } from "next-intl/server";
+import { MailtoProtocolClient } from "@/components/protocol/mailto-protocol-client";
+
+export default async function MailtoProtocolPage() {
+  const t = await getTranslations("protocol_handlers");
+
+  return <MailtoProtocolClient openingText={t("opening_mailto")} />;
+}

app/(main)/protocol/webcal/page.tsx

@@ -0,0 +1,8 @@
+import { getTranslations } from "next-intl/server";
+import { WebcalProtocolClient } from "@/components/protocol/webcal-protocol-client";
+
+export default async function WebcalProtocolPage() {
+  const t = await getTranslations("protocol_handlers");
+
+  return <WebcalProtocolClient openingText={t("opening_webcal")} />;
+}

app/(main)/setup/layout.tsx

@@ -0,0 +1,5 @@
+import type { ReactNode } from 'react';
+
+export default function SetupLayout({ children }: { children: ReactNode }) {
+  return <div className="min-h-screen bg-background text-foreground">{children}</div>;
+}

app/(sandbox)/layout.tsx

@@ -0,0 +1,32 @@
+import type { Metadata } from 'next';
+import type { ReactNode } from 'react';
+import { Geist, Geist_Mono } from 'next/font/google';
+import '../globals.css';
+
+const geistSans = Geist({
+  variable: '--font-geist-sans',
+  subsets: ['latin'],
+});
+
+const geistMono = Geist_Mono({
+  variable: '--font-geist-mono',
+  subsets: ['latin'],
+});
+
+export const metadata: Metadata = {
+  title: 'Plugin sandbox',
+  robots: { index: false, follow: false },
+};
+
+export default function PluginSandboxLayout({ children }: { children: ReactNode }) {
+  return (
+    <html lang="en">
+      <body
+        className={`${geistSans.variable} ${geistMono.variable} antialiased`}
+        style={{ margin: 0, padding: 0, background: 'transparent' }}
+      >
+        {children}
+      </body>
+    </html>
+  );
+}

app/(sandbox)/plugin-sandbox/page.tsx

@@ -0,0 +1,10 @@
+import { SandboxRuntime } from '@/lib/plugin-sandbox/runtime';
+
+// Must be dynamic so the per-request CSP nonce from proxy.ts is embedded in
+// Next's injected hydration/chunk scripts. With force-static, those scripts
+// render without a nonce and the strict sandbox CSP blocks them.
+export const dynamic = 'force-dynamic';
+
+export default function PluginSandboxPage() {
+  return <SandboxRuntime />;
+}

app/[locale]/auth/callback/page.tsx

@@ -1,123 +0,0 @@
-"use client";
-
-import { Suspense, useEffect, useState } from "react";
-import { useRouter, useSearchParams } from "next/navigation";
-import { useTranslations } from "next-intl";
-import { useAuthStore } from "@/stores/auth-store";
-import { Loader2, AlertCircle } from "lucide-react";
-import { Button } from "@/components/ui/button";
-import { useParams } from "next/navigation";
-
-function OAuthCallbackInner() {
-  const router = useRouter();
-  const params = useParams();
-  const searchParams = useSearchParams();
-  const t = useTranslations("login");
-  const { loginWithOAuth } = useAuthStore();
-  const [error, setError] = useState<string | null>(null);
-
-  useEffect(() => {
-    const code = searchParams.get("code");
-    const state = searchParams.get("state");
-    const errorParam = searchParams.get("error");
-
-    if (errorParam) {
-      setError(errorParam === "access_denied" ? "access_denied" : "token_exchange_failed");
-      return;
-    }
-
-    if (!code) {
-      setError("missing_params");
-      return;
-    }
-
-    const savedState = sessionStorage.getItem("oauth_state");
-    if (!state || state !== savedState) {
-      setError("invalid_state");
-      return;
-    }
-
-    const codeVerifier = sessionStorage.getItem("oauth_code_verifier");
-    const serverUrl = sessionStorage.getItem("oauth_server_url");
-
-    if (!codeVerifier || !serverUrl) {
-      setError("missing_params");
-      return;
-    }
-
-    const redirectUri = `${window.location.origin}/${params.locale}/auth/callback`;
-
-    loginWithOAuth(serverUrl, code, codeVerifier, redirectUri)
-      .then((success) => {
-        if (success) {
-          sessionStorage.removeItem("oauth_state");
-          sessionStorage.removeItem("oauth_code_verifier");
-          sessionStorage.removeItem("oauth_server_url");
-          sessionStorage.removeItem("oauth_add_account_mode");
-          let redirectTo = `/${params.locale}`;
-          try {
-            const saved = sessionStorage.getItem('redirect_after_login');
-            if (saved) {
-              sessionStorage.removeItem('redirect_after_login');
-              redirectTo = saved;
-            }
-          } catch { /* sessionStorage may be unavailable */ }
-          router.push(redirectTo);
-        } else {
-          setError("token_exchange_failed");
-        }
-      })
-      .catch(() => {
-        setError("token_exchange_failed");
-      });
-  }, []); // eslint-disable-line react-hooks/exhaustive-deps
-
-  if (error) {
-    return (
-      <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-background via-background to-muted/20">
-        <div className="w-full max-w-sm mx-auto px-4 text-center">
-          <div className="inline-flex items-center justify-center w-20 h-20 rounded-2xl bg-red-500/10 mb-6">
-            <AlertCircle className="w-10 h-10 text-red-500" />
-          </div>
-          <h1 className="text-xl font-medium text-foreground mb-2">
-            {t("oauth_error.title")}
-          </h1>
-          <p className="text-muted-foreground text-sm mb-6">
-            {t(`oauth_error.${error}`)}
-          </p>
-          <Button
-            variant="outline"
-            onClick={() => router.push(`/${params.locale}/login`)}
-          >
-            {t("oauth_error.back_to_login")}
-          </Button>
-        </div>
-      </div>
-    );
-  }
-
-  return (
-    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-background via-background to-muted/20">
-      <div className="w-full max-w-sm mx-auto px-4 text-center" role="status">
-        <Loader2 className="w-8 h-8 animate-spin text-primary mx-auto mb-4" />
-        <p className="text-muted-foreground text-sm">{t("oauth_completing")}</p>
-      </div>
-    </div>
-  );
-}
-
-export default function OAuthCallbackPage() {
-  return (
-    <Suspense
-      fallback={
-        <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-background via-background to-muted/20">
-          <div className="w-full max-w-sm mx-auto px-4 text-center" role="status">
-            <Loader2 className="w-8 h-8 animate-spin text-primary mx-auto mb-4" />
-          </div>
-        </div>
-      }
-    >
-      <OAuthCallbackInner />
-    </Suspense>
-  );
-}

app/[locale]/calendar/page.tsx

@@ -1,899 +0,0 @@
-"use client";
-
-import { useState, useEffect, useCallback, useRef, useMemo, type TouchEvent as ReactTouchEvent } from "react";
-import { useRouter } from "@/i18n/navigation";
-import { useTranslations } from "next-intl";
-import { Plus } from "lucide-react";
-import {
-  startOfMonth, endOfMonth, startOfWeek, endOfWeek,
-  addMonths, subMonths, addWeeks, subWeeks, addDays, subDays,
-  format, parseISO,
-} from "date-fns";
-import { useCalendarStore } from "@/stores/calendar-store";
-import { isCalendarViewMode } from "@/stores/calendar-store";
-import { useAuthStore } from "@/stores/auth-store";
-import { useEmailStore } from "@/stores/email-store";
-import { useSettingsStore } from "@/stores/settings-store";
-import { useIdentityStore } from "@/stores/identity-store";
-import { toast } from "@/stores/toast-store";
-import { useIsMobile } from "@/hooks/use-media-query";
-import { Button } from "@/components/ui/button";
-import { CalendarToolbar } from "@/components/calendar/calendar-toolbar";
-import { CalendarMonthView } from "@/components/calendar/calendar-month-view";
-import { CalendarWeekView } from "@/components/calendar/calendar-week-view";
-import { CalendarDayView } from "@/components/calendar/calendar-day-view";
-import { CalendarAgendaView } from "@/components/calendar/calendar-agenda-view";
-import { MiniCalendar } from "@/components/calendar/mini-calendar";
-import { CalendarSidebarPanel } from "@/components/calendar/calendar-sidebar-panel";
-import { EventModal } from "@/components/calendar/event-modal";
-import { EventDetailPopover } from "@/components/calendar/event-detail-popover";
-import { ICalImportModal } from "@/components/calendar/ical-import-modal";
-import { ICalSubscriptionModal } from "@/components/calendar/ical-subscription-modal";
-import { RecurrenceScopeDialog, type RecurrenceEditScope } from "@/components/calendar/recurrence-scope-dialog";
-import { NavigationRail } from "@/components/layout/navigation-rail";
-import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
-import { InlineAppView } from "@/components/layout/inline-app-view";
-import { useSidebarApps } from "@/hooks/use-sidebar-apps";
-import { ResizeHandle } from "@/components/layout/resize-handle";
-import { cn } from "@/lib/utils";
-import type { CalendarEvent, CalendarParticipant } from "@/lib/jmap/types";
-import { getUserParticipantId } from "@/lib/calendar-participants";
-import { debug } from "@/lib/debug";
-
-type PendingScopeAction =
-  | { type: "edit"; event: CalendarEvent; updates: Partial<CalendarEvent>; sendScheduling?: boolean }
-  | { type: "delete"; event: CalendarEvent; sendScheduling?: boolean };
-
-function isRecurringEvent(event: CalendarEvent): boolean {
-  return (event.recurrenceRules?.length ?? 0) > 0 || event.recurrenceId != null;
-}
-
-export default function CalendarPage() {
-  const router = useRouter();
-  const t = useTranslations("calendar");
-  const isMobile = useIsMobile();
-  const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
-  const { client, isAuthenticated, logout, checkAuth, isLoading: authLoading } = useAuthStore();
-  const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
-  const { quota, isPushConnected } = useEmailStore();
-  const {
-    calendars, events, selectedDate, viewMode, selectedCalendarIds,
-    isLoading, isLoadingEvents, supportsCalendar, error,
-    fetchCalendars, fetchEvents, createEvent, updateEvent, deleteEvent, rsvpEvent,
-    setSelectedDate, setViewMode, toggleCalendarVisibility, updateCalendar,
-    refreshAllSubscriptions,
-  } = useCalendarStore();
-  const { firstDayOfWeek, timeFormat } = useSettingsStore();
-  const { identities } = useIdentityStore();
-  const normalizedViewMode = isCalendarViewMode(viewMode) ? viewMode : "month";
-
-  const currentUserEmails = useMemo(() =>
-    identities.map(id => id.email).filter(Boolean),
-    [identities]
-  );
-
-  const [showEventModal, setShowEventModal] = useState(false);
-  const [showImportModal, setShowImportModal] = useState(false);
-  const [showSubscriptionModal, setShowSubscriptionModal] = useState(false);
-  const [editEvent, setEditEvent] = useState<CalendarEvent | null>(null);
-  const [defaultModalDate, setDefaultModalDate] = useState<Date | undefined>();
-  const [defaultModalEndDate, setDefaultModalEndDate] = useState<Date | undefined>();
-  const [miniMonth, setMiniMonth] = useState(new Date());
-  const [pendingScopeAction, setPendingScopeAction] = useState<PendingScopeAction | null>(null);
-  const [detailEvent, setDetailEvent] = useState<CalendarEvent | null>(null);
-  const [detailAnchorRect, setDetailAnchorRect] = useState<DOMRect | null>(null);
-  const hasFetched = useRef(false);
-
-  // Sidebar resize state
-  const [calSidebarWidth, setCalSidebarWidth] = useState(() => {
-    try { const v = localStorage.getItem("calendar-sidebar-width"); return v ? Number(v) : 256; } catch { return 256; }
-  });
-  const [isResizing, setIsResizing] = useState(false);
-  const dragStartWidth = useRef(256);
-
-  // Swipe navigation ref (handlers defined after navigatePrev/navigateNext)
-  const touchStartRef = useRef<{ x: number; y: number; time: number } | null>(null);
-
-  // Check auth on mount
-  useEffect(() => {
-    checkAuth().finally(() => {
-      setInitialCheckDone(true);
-    });
-  }, [checkAuth]);
-
-  useEffect(() => {
-    if (initialCheckDone && !isAuthenticated && !authLoading) {
-      try { sessionStorage.setItem('redirect_after_login', window.location.pathname); } catch { /* ignore */ }
-      router.push("/login");
-    } else if (client && !supportsCalendar) {
-      router.push("/");
-    }
-  }, [initialCheckDone, isAuthenticated, authLoading, client, supportsCalendar, router]);
-
-  useEffect(() => {
-    if (error) {
-      toast.error(error);
-    }
-  }, [error]);
-
-  useEffect(() => {
-    if (client && !hasFetched.current) {
-      hasFetched.current = true;
-      fetchCalendars(client);
-    }
-  }, [client, fetchCalendars]);
-
-  // Auto-refresh iCal subscriptions
-  useEffect(() => {
-    if (!client) return;
-    // Refresh on mount (respects per-subscription interval)
-    refreshAllSubscriptions(client);
-    // Check again every 5 minutes
-    const interval = setInterval(() => refreshAllSubscriptions(client), 5 * 60 * 1000);
-    return () => clearInterval(interval);
-  }, [client, refreshAllSubscriptions]);
-
-  const dateRange = useMemo(() => {
-    const d = selectedDate;
-    switch (normalizedViewMode) {
-      case "month": {
-        const ms = startOfMonth(d);
-        const me = endOfMonth(d);
-        return {
-          start: format(startOfWeek(ms, { weekStartsOn: firstDayOfWeek }), "yyyy-MM-dd'T'00:00:00"),
-          end: format(endOfWeek(me, { weekStartsOn: firstDayOfWeek }), "yyyy-MM-dd'T'23:59:59"),
-        };
-      }
-      case "week": {
-        const ws = startOfWeek(d, { weekStartsOn: firstDayOfWeek });
-        return {
-          start: format(ws, "yyyy-MM-dd'T'00:00:00"),
-          end: format(addDays(ws, 6), "yyyy-MM-dd'T'23:59:59"),
-        };
-      }
-      case "day":
-        return {
-          start: format(d, "yyyy-MM-dd'T'00:00:00"),
-          end: format(d, "yyyy-MM-dd'T'23:59:59"),
-        };
-      case "agenda":
-        return {
-          start: format(d, "yyyy-MM-dd'T'00:00:00"),
-          end: format(addDays(d, 30), "yyyy-MM-dd'T'23:59:59"),
-        };
-    }
-  }, [selectedDate, normalizedViewMode, firstDayOfWeek]);
-
-  useEffect(() => {
-    if (client && calendars.length > 0 && dateRange) {
-      fetchEvents(client, dateRange.start, dateRange.end);
-    }
-  }, [client, calendars.length, dateRange, fetchEvents]);
-
-  const navigatePrev = useCallback(() => {
-    let next: Date;
-    switch (normalizedViewMode) {
-      case "month": next = subMonths(selectedDate, 1); break;
-      case "week": next = subWeeks(selectedDate, 1); break;
-      case "day": next = subDays(selectedDate, 1); break;
-      case "agenda": next = subMonths(selectedDate, 1); break;
-    }
-    setSelectedDate(next);
-    setMiniMonth(next);
-  }, [normalizedViewMode, selectedDate, setSelectedDate]);
-
-  const navigateNext = useCallback(() => {
-    let next: Date;
-    switch (normalizedViewMode) {
-      case "month": next = addMonths(selectedDate, 1); break;
-      case "week": next = addWeeks(selectedDate, 1); break;
-      case "day": next = addDays(selectedDate, 1); break;
-      case "agenda": next = addMonths(selectedDate, 1); break;
-    }
-    setSelectedDate(next);
-    setMiniMonth(next);
-  }, [normalizedViewMode, selectedDate, setSelectedDate]);
-
-  const goToToday = useCallback(() => {
-    setSelectedDate(new Date());
-    setMiniMonth(new Date());
-  }, [setSelectedDate]);
-
-  // Swipe navigation handlers for mobile
-  const handleTouchStart = useCallback((e: ReactTouchEvent) => {
-    const touch = e.touches[0];
-    touchStartRef.current = { x: touch.clientX, y: touch.clientY, time: Date.now() };
-  }, []);
-
-  const handleTouchEnd = useCallback((e: ReactTouchEvent) => {
-    if (!touchStartRef.current || !isMobile) return;
-    const touch = e.changedTouches[0];
-    const dx = touch.clientX - touchStartRef.current.x;
-    const dy = touch.clientY - touchStartRef.current.y;
-    const elapsed = Date.now() - touchStartRef.current.time;
-    touchStartRef.current = null;
-
-    // Only trigger swipe if horizontal movement is dominant and fast enough
-    if (Math.abs(dx) > 60 && Math.abs(dx) > Math.abs(dy) * 1.5 && elapsed < 400) {
-      if (dx > 0) navigatePrev();
-      else navigateNext();
-    }
-  }, [isMobile, navigatePrev, navigateNext]);
-
-  const handleSelectDate = useCallback((date: Date) => {
-    setSelectedDate(date);
-    setMiniMonth(date);
-    // On mobile month view, tapping a date switches to day view
-    if (isMobile && normalizedViewMode === "month") {
-      setViewMode("day");
-    }
-  }, [setSelectedDate, isMobile, normalizedViewMode, setViewMode]);
-
-  const handleMiniMonthChange = useCallback((date: Date) => {
-    setMiniMonth(date);
-    setSelectedDate(date);
-  }, [setSelectedDate]);
-
-  const openCreateModal = useCallback((date?: Date, endDate?: Date) => {
-    setEditEvent(null);
-    const d = date || selectedDate;
-    setDefaultModalDate(d);
-    setDefaultModalEndDate(endDate);
-    setSelectedDate(d);
-    setShowEventModal(true);
-  }, [selectedDate, setSelectedDate]);
-
-  const openEditModal = useCallback((event: CalendarEvent) => {
-    setEditEvent(event);
-    setDefaultModalDate(undefined);
-    setShowEventModal(true);
-  }, []);
-
-  const hoverTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
-
-  const closeDetail = useCallback(() => {
-    if (hoverTimerRef.current) { clearTimeout(hoverTimerRef.current); hoverTimerRef.current = null; }
-    setDetailEvent(null);
-    setDetailAnchorRect(null);
-  }, []);
-
-  const handleSelectEvent = useCallback((event: CalendarEvent, _anchorRect: DOMRect) => {
-    // Click opens the sidebar for viewing/editing
-    closeDetail();
-    openEditModal(event);
-  }, [closeDetail, openEditModal]);
-
-  const handleHoverEvent = useCallback((event: CalendarEvent, anchorRect: DOMRect) => {
-    if (hoverTimerRef.current) { clearTimeout(hoverTimerRef.current); hoverTimerRef.current = null; }
-    // Don't show hover popover if the sidebar is already open for this event
-    if (showEventModal && editEvent?.id === event.id) return;
-    setDetailEvent(event);
-    setDetailAnchorRect(anchorRect);
-  }, [showEventModal, editEvent]);
-
-  const handleHoverLeave = useCallback(() => {
-    hoverTimerRef.current = setTimeout(() => {
-      setDetailEvent(null);
-      setDetailAnchorRect(null);
-    }, 200);
-  }, []);
-
-  const handleEditFromDetail = useCallback(() => {
-    if (detailEvent) {
-      const ev = detailEvent;
-      closeDetail();
-      openEditModal(ev);
-    }
-  }, [detailEvent, closeDetail, openEditModal]);
-
-  const findMasterEvent = useCallback(async (occurrence: CalendarEvent): Promise<CalendarEvent | null> => {
-    if ((occurrence.recurrenceRules?.length ?? 0) > 0 && !occurrence.recurrenceId) {
-      return occurrence;
-    }
-    const master = events.find(e =>
-      e.uid === occurrence.uid && !e.recurrenceId && (e.recurrenceRules?.length ?? 0) > 0
-    );
-    if (master) return master;
-    if (!client) return null;
-    try {
-      const results = await client.queryCalendarEvents({ uid: occurrence.uid });
-      return results.find(e => !e.recurrenceId && (e.recurrenceRules?.length ?? 0) > 0) || null;
-    } catch (error) {
-      debug.error("Failed to query master event for UID:", occurrence.uid, error);
-      throw error;
-    }
-  }, [events, client]);
-
-  const refetchCurrentRange = useCallback(async () => {
-    if (!client) return;
-    const { dateRange: currentRange } = useCalendarStore.getState();
-    if (currentRange) {
-      await fetchEvents(client, currentRange.start, currentRange.end);
-    }
-  }, [client, fetchEvents]);
-
-  const handleSaveEvent = useCallback(async (data: Partial<CalendarEvent>, sendSchedulingMessages?: boolean) => {
-    if (!client) { toast.error(t("notifications.event_error")); return; }
-    try {
-      if (editEvent) {
-        if (isRecurringEvent(editEvent)) {
-          setPendingScopeAction({
-            type: "edit",
-            event: editEvent,
-            updates: data,
-            sendScheduling: sendSchedulingMessages,
-          });
-          setShowEventModal(false);
-          setEditEvent(null);
-          return;
-        }
-        await updateEvent(client, editEvent.id, data, sendSchedulingMessages);
-        toast.success(t("notifications.event_updated"));
-      } else {
-        const created = await createEvent(client, data, sendSchedulingMessages);
-        if (!created) {
-          toast.error(t("notifications.event_error"));
-          return;
-        }
-        if (sendSchedulingMessages) {
-          toast.success(t("notifications.invitation_sent"));
-        } else {
-          toast.success(t("notifications.event_created"));
-        }
-      }
-      setShowEventModal(false);
-      setEditEvent(null);
-    } catch {
-      toast.error(t("notifications.event_error"));
-    }
-  }, [client, editEvent, createEvent, updateEvent, t]);
-
-  const handleDuplicateEvent = useCallback(async (data: Partial<CalendarEvent>) => {
-    if (!client) { toast.error(t("notifications.event_error")); return; }
-    try {
-      const created = await createEvent(client, data);
-      if (!created) {
-        toast.error(t("notifications.event_error"));
-        return;
-      }
-      toast.success(t("notifications.event_duplicated"));
-      setEditEvent(created);
-      setDefaultModalDate(undefined);
-    } catch {
-      toast.error(t("notifications.event_error"));
-      setShowEventModal(false);
-      setEditEvent(null);
-    }
-  }, [client, createEvent, t]);
-
-  const handleDeleteEvent = useCallback(async (id: string, sendSchedulingMessages?: boolean) => {
-    if (!client) { toast.error(t("notifications.event_error")); return; }
-    const eventToDelete = events.find(e => e.id === id) || editEvent;
-    if (eventToDelete && isRecurringEvent(eventToDelete)) {
-      setPendingScopeAction({
-        type: "delete",
-        event: eventToDelete,
-        sendScheduling: sendSchedulingMessages || undefined,
-      });
-      setShowEventModal(false);
-      setEditEvent(null);
-      return;
-    }
-    try {
-      await deleteEvent(client, id, sendSchedulingMessages);
-      toast.success(t("notifications.event_deleted"));
-    } catch {
-      toast.error(t("notifications.event_error"));
-    }
-  }, [client, deleteEvent, events, editEvent, t]);
-
-  const truncateRecurrenceAtEvent = useCallback(async (event: CalendarEvent): Promise<{
-    master: CalendarEvent;
-    originalRules: CalendarEvent["recurrenceRules"];
-  } | null> => {
-    const master = await findMasterEvent(event);
-    if (!master) return null;
-    const originalRules = master.recurrenceRules
-      ? JSON.parse(JSON.stringify(master.recurrenceRules))
-      : null;
-    const occurrenceDate = event.recurrenceId || event.start;
-    const untilDate = new Date(occurrenceDate);
-    untilDate.setSeconds(untilDate.getSeconds() - 1);
-    const until = format(untilDate, "yyyy-MM-dd'T'HH:mm:ss");
-    const truncatedRules = (master.recurrenceRules || []).map(rule => ({
-      ...rule,
-      until,
-      count: null,
-    }));
-    await updateEvent(client!, master.id, { recurrenceRules: truncatedRules });
-    return { master, originalRules };
-  }, [client, findMasterEvent, updateEvent]);
-
-  const handleScopeSelect = useCallback(async (scope: RecurrenceEditScope) => {
-    if (!client || !pendingScopeAction) { toast.error(t("notifications.event_error")); return; }
-    const { type, event, sendScheduling } = pendingScopeAction;
-    const updates = type === "edit" ? pendingScopeAction.updates : undefined;
-    setPendingScopeAction(null);
-
-    try {
-      if (type === "edit" && updates) {
-        switch (scope) {
-          case "this":
-            await updateEvent(client, event.id, updates, sendScheduling);
-            break;
-          case "this_and_future": {
-            const result = await truncateRecurrenceAtEvent(event);
-            if (!result) {
-              toast.error(t("notifications.event_error"));
-              return;
-            }
-            const { master, originalRules } = result;
-            const occurrenceStart = event.recurrenceId || event.start;
-            const newEventData: Partial<CalendarEvent> = {
-              title: master.title,
-              description: master.description,
-              duration: master.duration,
-              timeZone: master.timeZone,
-              calendarIds: { ...master.calendarIds },
-              status: master.status,
-              freeBusyStatus: master.freeBusyStatus,
-              privacy: master.privacy,
-              showWithoutTime: master.showWithoutTime,
-              recurrenceRules: originalRules,
-              ...updates,
-              start: updates.start || occurrenceStart,
-            };
-            delete (newEventData as Record<string, unknown>).id;
-            delete (newEventData as Record<string, unknown>).uid;
-            delete (newEventData as Record<string, unknown>).recurrenceId;
-            try {
-              await createEvent(client, newEventData, sendScheduling);
-            } catch (createError) {
-              debug.error("Failed to create new series, rolling back master truncation:", createError);
-              try {
-                await updateEvent(client, master.id, { recurrenceRules: originalRules });
-              } catch (rollbackError) {
-                debug.error("Rollback of master event also failed:", rollbackError);
-              }
-              throw createError;
-            }
-            break;
-          }
-          case "all": {
-            const master = await findMasterEvent(event);
-            if (!master) {
-              toast.error(t("notifications.event_error"));
-              return;
-            }
-            const allUpdates = { ...updates };
-            delete (allUpdates as Record<string, unknown>).recurrenceId;
-            await updateEvent(client, master.id, allUpdates, sendScheduling);
-            break;
-          }
-          default: {
-            const _exhaustive: never = scope;
-            throw new Error(`Unhandled scope: ${_exhaustive}`);
-          }
-        }
-        toast.success(t("notifications.event_updated"));
-      } else {
-        switch (scope) {
-          case "this":
-            await deleteEvent(client, event.id, sendScheduling);
-            break;
-          case "this_and_future": {
-            const result = await truncateRecurrenceAtEvent(event);
-            if (!result) {
-              toast.error(t("notifications.event_error"));
-              return;
-            }
-            break;
-          }
-          case "all": {
-            const master = await findMasterEvent(event);
-            if (!master) {
-              toast.error(t("notifications.event_error"));
-              return;
-            }
-            await deleteEvent(client, master.id, sendScheduling);
-            break;
-          }
-          default: {
-            const _exhaustive: never = scope;
-            throw new Error(`Unhandled scope: ${_exhaustive}`);
-          }
-        }
-        toast.success(t("notifications.event_deleted"));
-      }
-      try {
-        await refetchCurrentRange();
-      } catch {
-        debug.error("Failed to refresh calendar after scope operation");
-      }
-    } catch {
-      toast.error(t("notifications.event_error"));
-    }
-  }, [client, pendingScopeAction, updateEvent, deleteEvent, createEvent, findMasterEvent, truncateRecurrenceAtEvent, refetchCurrentRange, t]);
-
-  const handleRsvp = useCallback(async (eventId: string, participantId: string, status: CalendarParticipant['participationStatus']) => {
-    if (!client) return;
-    try {
-      await rsvpEvent(client, eventId, participantId, status);
-      toast.success(t("notifications.rsvp_updated"));
-    } catch {
-      toast.error(t("notifications.rsvp_error"));
-    }
-  }, [client, rsvpEvent, t]);
-
-  const handleDeleteFromDetail = useCallback(() => {
-    if (!detailEvent) return;
-    const hasParticipants = detailEvent.participants && Object.keys(detailEvent.participants).length > 0;
-    closeDetail();
-    handleDeleteEvent(detailEvent.id, hasParticipants || undefined);
-  }, [detailEvent, closeDetail, handleDeleteEvent]);
-
-  const handleDuplicateFromDetail = useCallback(async () => {
-    if (!detailEvent || !client) return;
-    const start = parseISO(detailEvent.start);
-    const newStart = addDays(start, 1);
-    const data: Partial<CalendarEvent> = {
-      title: detailEvent.title,
-      description: detailEvent.description,
-      start: format(newStart, "yyyy-MM-dd'T'HH:mm:ss"),
-      duration: detailEvent.duration,
-      timeZone: detailEvent.timeZone,
-      showWithoutTime: detailEvent.showWithoutTime,
-      calendarIds: { ...detailEvent.calendarIds },
-      status: "confirmed",
-      freeBusyStatus: detailEvent.freeBusyStatus,
-      privacy: detailEvent.privacy,
-    };
-    if (detailEvent.locations) data.locations = structuredClone(detailEvent.locations);
-    if (detailEvent.recurrenceRules) data.recurrenceRules = structuredClone(detailEvent.recurrenceRules);
-    if (detailEvent.alerts) data.alerts = structuredClone(detailEvent.alerts);
-    if (detailEvent.participants) data.participants = structuredClone(detailEvent.participants);
-    closeDetail();
-    try {
-      const created = await createEvent(client, data);
-      if (created) {
-        toast.success(t("notifications.event_duplicated"));
-        openEditModal(created);
-      }
-    } catch {
-      toast.error(t("notifications.event_error"));
-    }
-  }, [detailEvent, client, createEvent, closeDetail, openEditModal, t]);
-
-  const handleSaveNoteFromDetail = useCallback(async (note: string) => {
-    if (!detailEvent || !client) return;
-    const timestamp = format(new Date(), "yyyy-MM-dd HH:mm");
-    const separator = `\n\n--- ${timestamp} ---\n`;
-    const newDescription = detailEvent.description
-      ? `${detailEvent.description}${separator}${note}`
-      : `--- ${timestamp} ---\n${note}`;
-    try {
-      await updateEvent(client, detailEvent.id, { description: newDescription });
-      setDetailEvent({ ...detailEvent, description: newDescription });
-      toast.success(t("detail.note_saved"));
-    } catch {
-      toast.error(t("notifications.event_error"));
-    }
-  }, [detailEvent, client, updateEvent, t]);
-
-  const handleRsvpFromDetail = useCallback(async (status: CalendarParticipant['participationStatus']) => {
-    if (!detailEvent || !client) return;
-    const participantId = getUserParticipantId(detailEvent, currentUserEmails);
-    if (!participantId) return;
-    closeDetail();
-    await handleRsvp(detailEvent.id, participantId, status);
-  }, [detailEvent, client, currentUserEmails, closeDetail, handleRsvp]);
-
-  useEffect(() => {
-    const handleKey = (e: KeyboardEvent) => {
-      const target = e.target as HTMLElement;
-      if (target.tagName === "INPUT" || target.tagName === "TEXTAREA" || target.tagName === "SELECT") return;
-      if (showEventModal || detailEvent) return;
-
-      switch (e.key) {
-        case "ArrowLeft": e.preventDefault(); navigatePrev(); break;
-        case "ArrowRight": e.preventDefault(); navigateNext(); break;
-        case "t": goToToday(); break;
-        case "m": setViewMode("month"); break;
-        case "w": setViewMode("week"); break;
-        case "d": setViewMode("day"); break;
-        case "a": setViewMode("agenda"); break;
-        case "n": openCreateModal(); break;
-      }
-    };
-    window.addEventListener("keydown", handleKey);
-    return () => window.removeEventListener("keydown", handleKey);
-  }, [navigatePrev, navigateNext, goToToday, setViewMode, openCreateModal, showEventModal, detailEvent]);
-
-  const visibleEvents = useMemo(() =>
-    events.filter((e) => {
-      if (!e.calendarIds) return false;
-      const calIds = Object.keys(e.calendarIds);
-      return calIds.some((id) => selectedCalendarIds.includes(id));
-    }),
-    [events, selectedCalendarIds]
-  );
-
-  if (!isAuthenticated || !supportsCalendar) return null;
-
-  const renderView = () => {
-    if (isLoading && calendars.length === 0) {
-      return (
-        <div className="flex items-center justify-center flex-1 text-muted-foreground">
-          <p className="text-sm">{t("status.loading_calendars")}</p>
-        </div>
-      );
-    }
-
-    const viewContent = (() => {
-      switch (normalizedViewMode) {
-        case "month":
-          return (
-            <CalendarMonthView
-              selectedDate={selectedDate}
-              events={visibleEvents}
-              calendars={calendars}
-              onSelectDate={handleSelectDate}
-              onSelectEvent={handleSelectEvent}
-              onHoverEvent={handleHoverEvent}
-              onHoverLeave={handleHoverLeave}
-              onCreateAtTime={openCreateModal}
-              firstDayOfWeek={firstDayOfWeek}
-              isMobile={isMobile}
-            />
-          );
-        case "week":
-          return (
-            <CalendarWeekView
-              selectedDate={selectedDate}
-              events={visibleEvents}
-              calendars={calendars}
-              onSelectDate={handleSelectDate}
-              onSelectEvent={handleSelectEvent}
-              onHoverEvent={handleHoverEvent}
-              onHoverLeave={handleHoverLeave}
-              onCreateAtTime={openCreateModal}
-              firstDayOfWeek={firstDayOfWeek}
-              timeFormat={timeFormat}
-              isMobile={isMobile}
-            />
-          );
-        case "day":
-          return (
-            <CalendarDayView
-              selectedDate={selectedDate}
-              events={visibleEvents}
-              calendars={calendars}
-              onSelectEvent={handleSelectEvent}
-              onHoverEvent={handleHoverEvent}
-              onHoverLeave={handleHoverLeave}
-              onCreateAtTime={openCreateModal}
-              timeFormat={timeFormat}
-              isMobile={isMobile}
-            />
-          );
-        case "agenda":
-          return (
-            <CalendarAgendaView
-              selectedDate={selectedDate}
-              events={visibleEvents}
-              calendars={calendars}
-              onSelectEvent={handleSelectEvent}
-              onHoverEvent={handleHoverEvent}
-              onHoverLeave={handleHoverLeave}
-              timeFormat={timeFormat}
-            />
-          );
-      }
-    })();
-
-    return (
-      <div className="relative flex-1 flex flex-col overflow-hidden">
-        {viewContent}
-        {isLoadingEvents && calendars.length > 0 && events.length === 0 && (
-          <div className="absolute inset-0 bg-background/50 flex items-center justify-center pointer-events-none">
-            <div className="h-5 w-5 border-2 border-primary border-t-transparent rounded-full animate-spin" />
-          </div>
-        )}
-      </div>
-    );
-  };
-
-  return (
-    <div className="flex h-dvh bg-background overflow-hidden">
-      {/* Left Navigation Rail */}
-      {!isMobile && (
-        <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
-          <NavigationRail
-            collapsed
-            quota={quota}
-            isPushConnected={isPushConnected}
-            onLogout={() => { logout(); if (!useAuthStore.getState().isAuthenticated) router.push('/login'); }}
-            onManageApps={handleManageApps}
-            onInlineApp={handleInlineApp}
-            onCloseInlineApp={closeInlineApp}
-            activeAppId={inlineApp?.id ?? null}
-          />
-        </div>
-      )}
-
-      {inlineApp && (
-        <InlineAppView apps={loadedApps} activeAppId={inlineApp!.id} onClose={closeInlineApp} className="flex-1" />
-      )}
-
-      {/* Sidebar - full height */}
-      {!isMobile && !inlineApp && (
-        <>
-          <div
-            className={cn(
-              "border-r border-border bg-secondary overflow-y-auto flex-shrink-0 p-3",
-              !isResizing && "transition-[width] duration-300"
-            )}
-            style={{ width: `${calSidebarWidth}px` }}
-          >
-            <MiniCalendar
-              selectedDate={selectedDate}
-              displayMonth={miniMonth}
-              onSelectDate={handleSelectDate}
-              onChangeMonth={handleMiniMonthChange}
-              events={events}
-              firstDayOfWeek={firstDayOfWeek}
-            />
-            <CalendarSidebarPanel
-              calendars={calendars}
-              selectedCalendarIds={selectedCalendarIds}
-              onToggleVisibility={toggleCalendarVisibility}
-              onColorChange={client ? (calendarId, color) => {
-                updateCalendar(client, calendarId, { color });
-              } : undefined}
-              onSubscribe={() => setShowSubscriptionModal(true)}
-              client={client}
-            />
-          </div>
-          <ResizeHandle
-            onResizeStart={() => { dragStartWidth.current = calSidebarWidth; setIsResizing(true); }}
-            onResize={(delta) => setCalSidebarWidth(Math.max(180, Math.min(400, dragStartWidth.current + delta)))}
-            onResizeEnd={() => {
-              setIsResizing(false);
-              localStorage.setItem("calendar-sidebar-width", String(calSidebarWidth));
-            }}
-            onDoubleClick={() => { setCalSidebarWidth(256); localStorage.setItem("calendar-sidebar-width", "256"); }}
-          />
-        </>
-      )}
-
-      {!inlineApp && (
-      <div className="flex flex-col flex-1 min-w-0">
-        <CalendarToolbar
-          selectedDate={selectedDate}
-          viewMode={normalizedViewMode}
-          onPrev={navigatePrev}
-          onNext={navigateNext}
-          onToday={goToToday}
-          onViewModeChange={setViewMode}
-          onCreateEvent={() => openCreateModal()}
-          onImport={() => setShowImportModal(true)}
-          onSubscribe={() => setShowSubscriptionModal(true)}
-          isMobile={isMobile}
-          calendars={calendars}
-          selectedCalendarIds={selectedCalendarIds}
-          onToggleVisibility={toggleCalendarVisibility}
-        />
-
-        <div
-          className="flex flex-1 overflow-hidden relative"
-          onTouchStart={handleTouchStart}
-          onTouchEnd={handleTouchEnd}
-        >
-          {renderView()}
-
-          {/* Desktop event panel */}
-          {!isMobile && showEventModal && (
-            <div className="w-[400px] border-l border-border flex-shrink-0 overflow-hidden">
-              <EventModal
-                key={editEvent?.id ?? 'new'}
-                event={editEvent}
-                calendars={calendars}
-                defaultDate={defaultModalDate}
-                defaultEndDate={defaultModalEndDate}
-                onSave={handleSaveEvent}
-                onDelete={handleDeleteEvent}
-                onDuplicate={handleDuplicateEvent}
-                onRsvp={handleRsvp}
-                onClose={() => { setShowEventModal(false); setEditEvent(null); }}
-                currentUserEmails={currentUserEmails}
-                isMobile={false}
-              />
-            </div>
-          )}
-
-          {/* Floating Create Event Button (mobile) */}
-          {isMobile && (
-            <Button
-              onClick={() => openCreateModal()}
-              className="absolute bottom-4 right-4 z-40 h-14 w-14 rounded-full shadow-lg"
-              aria-label={t("events.create")}
-            >
-              <Plus className="h-6 w-6" />
-            </Button>
-          )}
-        </div>
-      </div>
-      )}
-
-      {/* Mobile Bottom Navigation */}
-      {isMobile && (
-        <NavigationRail
-          orientation="horizontal"
-          onManageApps={handleManageApps}
-          onInlineApp={handleInlineApp}
-          onCloseInlineApp={closeInlineApp}
-          activeAppId={inlineApp?.id ?? null}
-        />
-      )}
-
-      {detailEvent && detailAnchorRect && (
-        <EventDetailPopover
-          event={detailEvent}
-          calendar={calendars.find(c => detailEvent.calendarIds[c.id])}
-          anchorRect={detailAnchorRect}
-          onEdit={handleEditFromDetail}
-          onDelete={handleDeleteFromDetail}
-          onDuplicate={handleDuplicateFromDetail}
-          onClose={closeDetail}
-          onSaveNote={handleSaveNoteFromDetail}
-          onRsvp={handleRsvpFromDetail}
-          onMouseEnter={() => { if (hoverTimerRef.current) { clearTimeout(hoverTimerRef.current); hoverTimerRef.current = null; } }}
-          onMouseLeave={handleHoverLeave}
-          currentUserEmails={currentUserEmails}
-          timeFormat={timeFormat}
-          isMobile={isMobile}
-        />
-      )}
-
-      {showEventModal && isMobile && (
-        <EventModal
-          key={editEvent?.id ?? 'new'}
-          event={editEvent}
-          calendars={calendars}
-          defaultDate={defaultModalDate}
-          defaultEndDate={defaultModalEndDate}
-          onSave={handleSaveEvent}
-          onDelete={handleDeleteEvent}
-          onDuplicate={handleDuplicateEvent}
-          onRsvp={handleRsvp}
-          onClose={() => { setShowEventModal(false); setEditEvent(null); }}
-          currentUserEmails={currentUserEmails}
-          isMobile={true}
-        />
-      )}
-
-      {showImportModal && client && (
-        <ICalImportModal
-          calendars={calendars}
-          client={client}
-          onClose={() => setShowImportModal(false)}
-        />
-      )}
-
-      {showSubscriptionModal && client && (
-        <ICalSubscriptionModal
-          client={client}
-          onClose={() => setShowSubscriptionModal(false)}
-        />
-      )}
-
-      <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
-      <RecurrenceScopeDialog
-        isOpen={!!pendingScopeAction}
-        actionType={pendingScopeAction?.type || "edit"}
-        onSelect={handleScopeSelect}
-        onClose={() => setPendingScopeAction(null)}
-      />
-    </div>
-  );
-}

app/[locale]/layout.tsx

@@ -1,34 +0,0 @@
-import { notFound } from "next/navigation";
-import { IntlProvider } from "@/components/providers/intl-provider";
-import { ThemeProvider } from "@/components/providers/theme-provider";
-import { CalendarAlertProvider } from "@/components/providers/calendar-alert-provider";
-import { locales } from "@/i18n/routing";
-
-export default async function LocaleLayout({
-  children,
-  params,
-}: {
-  children: React.ReactNode;
-  params: Promise<{ locale: string }>;
-}) {
-  const { locale } = await params;
-
-  if (!(locales as readonly string[]).includes(locale)) notFound();
-
-  let messages;
-  try {
-    messages = (await import(`@/locales/${locale}/common.json`)).default;
-  } catch {
-    notFound();
-  }
-
-  return (
-    <IntlProvider locale={locale} messages={messages}>
-      <ThemeProvider>
-        <CalendarAlertProvider>
-          {children}
-        </CalendarAlertProvider>
-      </ThemeProvider>
-    </IntlProvider>
-  );
-}

app/[locale]/settings/page.tsx

@@ -1,425 +0,0 @@
-"use client";
-
-import { useState, useEffect, useRef } from 'react';
-import { useRouter } from '@/i18n/navigation';
-import { useTranslations } from 'next-intl';
-import {
-  ArrowLeft,
-  ChevronRight,
-  LogOut,
-  Settings as SettingsIcon,
-  Palette,
-  Mail,
-  User,
-  Shield,
-  UserPen,
-  PalmtreeIcon,
-  Calendar,
-  Filter,
-  FileText,
-  FolderOpen,
-  Tags,
-  HardDrive,
-  Wrench,
-  BookUser,
-  KeyRound,
-  PanelLeftClose,
-  type LucideIcon,
-} from 'lucide-react';
-import { Button } from '@/components/ui/button';
-import { AppearanceSettings } from '@/components/settings/appearance-settings';
-import { EmailSettings } from '@/components/settings/email-settings';
-import { AccountSettings } from '@/components/settings/account-settings';
-import { IdentitySettings } from '@/components/settings/identity-settings';
-import { VacationSettings } from '@/components/settings/vacation-settings';
-import { CalendarSettings } from '@/components/settings/calendar-settings';
-import { CalendarManagementSettings } from '@/components/settings/calendar-management-settings';
-import { FilterSettings } from '@/components/settings/filter-settings';
-import { TemplateSettings } from '@/components/settings/template-settings';
-import { AdvancedSettings } from '@/components/settings/advanced-settings';
-import { FolderSettings } from '@/components/settings/folder-settings';
-import { KeywordSettings } from '@/components/settings/keyword-settings';
-import { AccountSecuritySettings } from '@/components/settings/account-security-settings';
-import { FilesSettingsComponent } from '@/components/settings/files-settings';
-import { ContactsSettings } from '@/components/settings/contacts-settings';
-import { SmimeSettings } from '@/components/settings/smime-settings';
-import { SidebarAppsSettings } from '@/components/settings/sidebar-apps-settings';
-import { useAuthStore } from '@/stores/auth-store';
-import { useEmailStore } from '@/stores/email-store';
-import { useIsDesktop } from '@/hooks/use-media-query';
-import { NavigationRail } from '@/components/layout/navigation-rail';
-import { SidebarAppsModal } from '@/components/layout/sidebar-apps-modal';
-import { InlineAppView } from '@/components/layout/inline-app-view';
-import { useSidebarApps } from '@/hooks/use-sidebar-apps';
-import { ResizeHandle } from '@/components/layout/resize-handle';
-import { useConfig } from '@/hooks/use-config';
-import { cn } from '@/lib/utils';
-
-type Tab = 'appearance' | 'email' | 'account' | 'security' | 'identities' | 'encryption' | 'vacation' | 'calendar' | 'contacts' | 'filters' | 'templates' | 'folders' | 'keywords' | 'files' | 'sidebar_apps' | 'advanced';
-type TabGroup = 'general' | 'account' | 'organization' | 'apps' | 'system';
-
-interface TabDef {
-  id: Tab;
-  label: string;
-  icon: LucideIcon;
-  group: TabGroup;
-}
-
-const tabIcons: Record<Tab, LucideIcon> = {
-  appearance: Palette,
-  email: Mail,
-  account: User,
-  security: Shield,
-  identities: UserPen,
-  encryption: KeyRound,
-  vacation: PalmtreeIcon,
-  calendar: Calendar,
-  contacts: BookUser,
-  filters: Filter,
-  templates: FileText,
-  folders: FolderOpen,
-  keywords: Tags,
-  files: HardDrive,
-  sidebar_apps: PanelLeftClose,
-  advanced: Wrench,
-};
-
-const tabGroupOrder: TabGroup[] = ['general', 'account', 'organization', 'apps', 'system'];
-
-export default function SettingsPage() {
-  const router = useRouter();
-  const t = useTranslations('settings');
-  const tSidebar = useTranslations('sidebar');
-  const { client, isAuthenticated, logout, checkAuth, isLoading: authLoading } = useAuthStore();
-  const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
-  const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
-  const { quota, isPushConnected } = useEmailStore();
-  const { stalwartFeaturesEnabled } = useConfig();
-  const [activeTab, setActiveTab] = useState<Tab>(() => {
-    try {
-      const saved = localStorage.getItem('settings-active-tab');
-      if (saved) return saved as Tab;
-    } catch { /* ignore */ }
-    return 'appearance';
-  });
-  const [mobileShowContent, setMobileShowContent] = useState(false);
-  const isDesktop = useIsDesktop();
-
-  // Sidebar resize state
-  const [settingsSidebarWidth, setSettingsSidebarWidth] = useState(() => {
-    try { const v = localStorage.getItem('settings-sidebar-width'); return v ? Number(v) : 256; } catch { return 256; }
-  });
-  const [isResizing, setIsResizing] = useState(false);
-  const dragStartWidth = useRef(256);
-
-  // Check auth on mount
-  useEffect(() => {
-    checkAuth().finally(() => {
-      setInitialCheckDone(true);
-    });
-  }, [checkAuth]);
-
-  useEffect(() => {
-    if (initialCheckDone && !isAuthenticated && !authLoading) {
-      try { sessionStorage.setItem('redirect_after_login', window.location.pathname); } catch { /* ignore */ }
-      router.push('/login');
-    }
-  }, [initialCheckDone, isAuthenticated, authLoading, router]);
-
-  if (!isAuthenticated) {
-    return null;
-  }
-
-  const supportsVacation = client?.supportsVacationResponse() ?? false;
-  const supportsCalendar = client?.supportsCalendars() ?? false;
-  const supportsSieve = client?.supportsSieve() ?? false;
-  const supportsFiles = client?.supportsFiles() ?? false;
-
-  const tabs: TabDef[] = [
-    { id: 'appearance', label: t('tabs.appearance'), icon: tabIcons.appearance, group: 'general' },
-    { id: 'email', label: t('tabs.email'), icon: tabIcons.email, group: 'general' },
-    { id: 'account', label: t('tabs.account'), icon: tabIcons.account, group: 'account' },
-    ...(stalwartFeaturesEnabled ? [{ id: 'security' as Tab, label: t('tabs.security'), icon: tabIcons.security, group: 'account' as TabGroup }] : []),
-    { id: 'identities', label: t('tabs.identities'), icon: tabIcons.identities, group: 'account' },
-    { id: 'encryption', label: t('tabs.encryption'), icon: tabIcons.encryption, group: 'account' },
-    ...(supportsVacation ? [{ id: 'vacation' as Tab, label: t('tabs.vacation'), icon: tabIcons.vacation, group: 'account' as TabGroup }] : []),
-    ...(supportsSieve ? [{ id: 'filters' as Tab, label: t('tabs.filters'), icon: tabIcons.filters, group: 'organization' as TabGroup }] : []),
-    { id: 'templates', label: t('tabs.templates'), icon: tabIcons.templates, group: 'organization' },
-    { id: 'folders', label: t('tabs.folders'), icon: tabIcons.folders, group: 'organization' },
-    { id: 'keywords', label: t('tabs.keywords'), icon: tabIcons.keywords, group: 'organization' },
-    ...(supportsCalendar ? [{ id: 'calendar' as Tab, label: t('tabs.calendar'), icon: tabIcons.calendar, group: 'apps' as TabGroup }] : []),
-    { id: 'contacts', label: t('tabs.contacts'), icon: tabIcons.contacts, group: 'apps' },
-    ...(supportsFiles ? [{ id: 'files' as Tab, label: t('tabs.files'), icon: tabIcons.files, group: 'apps' as TabGroup }] : []),
-    { id: 'sidebar_apps', label: t('tabs.sidebar_apps'), icon: tabIcons.sidebar_apps, group: 'apps' },
-    { id: 'advanced', label: t('tabs.advanced'), icon: tabIcons.advanced, group: 'system' },
-  ];
-
-  // Group tabs by category
-  const groupedTabs = tabGroupOrder
-    .map((group) => ({
-      group,
-      label: t(`tab_groups.${group}`),
-      items: tabs.filter((tab) => tab.group === group),
-    }))
-    .filter((g) => g.items.length > 0);
-
-  const handleTabSelect = (tabId: Tab) => {
-    setActiveTab(tabId);
-    try { localStorage.setItem('settings-active-tab', tabId); } catch { /* ignore */ }
-    if (!isDesktop) {
-      setMobileShowContent(true);
-    }
-  };
-
-  const activeTabLabel = tabs.find((tab) => tab.id === activeTab)?.label ?? '';
-
-  const renderTabContent = () => (
-    <>
-      {activeTab === 'appearance' && <AppearanceSettings />}
-      {activeTab === 'email' && <EmailSettings />}
-      {activeTab === 'account' && <AccountSettings />}
-      {activeTab === 'security' && <AccountSecuritySettings />}
-      {activeTab === 'identities' && <IdentitySettings />}
-      {activeTab === 'encryption' && <SmimeSettings />}
-      {activeTab === 'vacation' && <VacationSettings />}
-      {activeTab === 'calendar' && <><CalendarSettings /><div className="mt-8"><CalendarManagementSettings /></div></>}
-      {activeTab === 'contacts' && <ContactsSettings />}
-      {activeTab === 'filters' && <FilterSettings />}
-      {activeTab === 'templates' && <TemplateSettings />}
-      {activeTab === 'folders' && <FolderSettings />}
-      {activeTab === 'keywords' && <KeywordSettings />}
-      {activeTab === 'files' && <FilesSettingsComponent />}
-      {activeTab === 'sidebar_apps' && <SidebarAppsSettings />}
-      {activeTab === 'advanced' && <AdvancedSettings />}
-    </>
-  );
-
-  // Mobile layout
-  if (!isDesktop) {
-    // Mobile: show content view
-    if (mobileShowContent) {
-      return (
-        <div className="flex flex-col h-dvh bg-background">
-          {/* Mobile content header */}
-          <div className="flex items-center gap-2 px-4 h-14 border-b border-border bg-background shrink-0">
-            <Button
-              variant="ghost"
-              size="icon"
-              onClick={() => setMobileShowContent(false)}
-              className="h-10 w-10"
-            >
-              <ArrowLeft className="w-5 h-5" />
-            </Button>
-            <h1 className="font-semibold text-lg truncate">{activeTabLabel}</h1>
-          </div>
-
-          {/* Content */}
-          <div className="flex-1 overflow-y-auto p-4">
-            <div className="bg-card border border-border rounded-lg p-4">
-              {renderTabContent()}
-            </div>
-          </div>
-
-          {/* Bottom Navigation */}
-          <NavigationRail
-            orientation="horizontal"
-            onManageApps={handleManageApps}
-            onInlineApp={handleInlineApp}
-            onCloseInlineApp={closeInlineApp}
-            activeAppId={inlineApp?.id ?? null}
-          />
-          <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
-        </div>
-      );
-    }
-
-    // Mobile: show tab list
-    return (
-      <div className="flex flex-col h-dvh bg-background">
-        {/* Mobile header */}
-        <div className="flex items-center gap-2 px-4 h-14 border-b border-border bg-background shrink-0">
-          <Button
-            variant="ghost"
-            size="icon"
-            onClick={() => router.push('/')}
-            className="h-10 w-10"
-          >
-            <ArrowLeft className="w-5 h-5" />
-          </Button>
-          <div className="flex items-center gap-2">
-            <SettingsIcon className="w-5 h-5 text-muted-foreground" />
-            <h1 className="font-semibold text-lg">{t('title')}</h1>
-          </div>
-        </div>
-
-        {/* Tab list */}
-        <div className="flex-1 overflow-y-auto">
-          <div className="py-2">
-            {groupedTabs.map((group, groupIndex) => (
-              <div key={group.group}>
-                {groupIndex > 0 && <div className="mx-5 my-2 border-t border-border" />}
-                <div className="px-5 pt-3 pb-1.5">
-                  <span className="text-xs font-semibold uppercase tracking-wider text-muted-foreground">
-                    {group.label}
-                  </span>
-                </div>
-                {group.items.map((tab) => {
-                  const Icon = tab.icon;
-                  return (
-                    <button
-                      key={tab.id}
-                      onClick={() => handleTabSelect(tab.id)}
-                      className="w-full flex items-center justify-between px-5 py-3.5 text-sm text-foreground hover:bg-muted transition-colors duration-150"
-                    >
-                      <span className="flex items-center gap-3">
-                        <Icon className="w-4 h-4 text-muted-foreground" />
-                        {tab.label}
-                      </span>
-                      <ChevronRight className="w-4 h-4 text-muted-foreground" />
-                    </button>
-                  );
-                })}
-              </div>
-            ))}
-          </div>
-
-          {/* Logout */}
-          <div className="border-t border-border px-5 py-3">
-            <button
-              onClick={() => { logout(); if (!useAuthStore.getState().isAuthenticated) router.push('/login'); }}
-              className="w-full flex items-center gap-3 py-2.5 text-sm text-destructive hover:bg-muted rounded-md px-2 transition-colors duration-150"
-            >
-              <LogOut className="w-4 h-4" />
-              <span>{tSidebar('sign_out')}</span>
-            </button>
-          </div>
-        </div>
-
-        {/* Bottom Navigation */}
-        <NavigationRail
-          orientation="horizontal"
-          onManageApps={handleManageApps}
-          onInlineApp={handleInlineApp}
-          onCloseInlineApp={closeInlineApp}
-          activeAppId={inlineApp?.id ?? null}
-        />
-        <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
-      </div>
-    );
-  }
-
-  // Desktop layout
-  return (
-    <div className="flex h-dvh bg-background">
-      {/* Navigation Rail */}
-      <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
-        <NavigationRail
-          collapsed
-          quota={quota}
-          isPushConnected={isPushConnected}
-          onLogout={() => { logout(); if (!useAuthStore.getState().isAuthenticated) router.push('/login'); }}
-          onManageApps={handleManageApps}
-          onInlineApp={handleInlineApp}
-          onCloseInlineApp={closeInlineApp}
-          activeAppId={inlineApp?.id ?? null}
-        />
-      </div>
-
-      {inlineApp && (
-        <InlineAppView apps={loadedApps} activeAppId={inlineApp!.id} onClose={closeInlineApp} className="flex-1" />
-      )}
-      {!inlineApp && (
-      <>
-      {/* Settings Sidebar */}
-      <div
-        className={cn(
-          "border-r border-border bg-secondary flex flex-col",
-          !isResizing && "transition-[width] duration-300"
-        )}
-        style={{ width: `${settingsSidebarWidth}px` }}
-      >
-        {/* Header */}
-        <div className="p-4 border-b border-border">
-          <Button
-            variant="ghost"
-            size="sm"
-            onClick={() => router.push('/')}
-            className="w-full justify-start"
-          >
-            <ArrowLeft className="w-4 h-4 mr-2" />
-            {t('back_to_mail')}
-          </Button>
-        </div>
-
-        {/* Tabs */}
-        <div className="flex-1 overflow-y-auto py-2">
-          <div className="px-2 space-y-0.5">
-            {groupedTabs.map((group, groupIndex) => (
-              <div key={group.group}>
-                {groupIndex > 0 && <div className="mx-1 my-2 border-t border-border" />}
-                <div className="px-3 pt-2.5 pb-1">
-                  <span className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
-                    {group.label}
-                  </span>
-                </div>
-                {group.items.map((tab) => {
-                  const Icon = tab.icon;
-                  return (
-                    <button
-                      key={tab.id}
-                      onClick={() => setActiveTab(tab.id)}
-                      className={cn(
-                        'w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
-                        activeTab === tab.id
-                          ? 'bg-accent text-accent-foreground font-medium'
-                          : 'hover:bg-muted text-foreground'
-                      )}
-                    >
-                      <Icon className={cn(
-                        'w-4 h-4 shrink-0',
-                        activeTab === tab.id ? 'text-accent-foreground' : 'text-muted-foreground'
-                      )} />
-                      {tab.label}
-                    </button>
-                  );
-                })}
-              </div>
-            ))}
-          </div>
-        </div>
-      </div>
-
-      {/* Sidebar resize handle */}
-      <ResizeHandle
-        onResizeStart={() => { dragStartWidth.current = settingsSidebarWidth; setIsResizing(true); }}
-        onResize={(delta) => setSettingsSidebarWidth(Math.max(180, Math.min(400, dragStartWidth.current + delta)))}
-        onResizeEnd={() => {
-          setIsResizing(false);
-          localStorage.setItem('settings-sidebar-width', String(settingsSidebarWidth));
-        }}
-        onDoubleClick={() => { setSettingsSidebarWidth(256); localStorage.setItem('settings-sidebar-width', '256'); }}
-      />
-
-      {/* Settings Content */}
-      <div className="flex-1 overflow-y-auto">
-        <div className="max-w-3xl mx-auto p-8">
-          {/* Page Header */}
-          <div className="mb-6">
-            <div className="flex items-center gap-2.5 mb-2">
-              <SettingsIcon className="w-6 h-6 text-muted-foreground" />
-              <h1 className="text-2xl font-semibold text-foreground">{t('title')}</h1>
-            </div>
-          </div>
-
-          {/* Active Tab Content */}
-          <div className="bg-card border border-border rounded-lg p-6">
-            {renderTabContent()}
-          </div>
-        </div>
-      </div>
-      </>
-      )}
-      <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
-    </div>
-  );
-}

app/api/account/stalwart/auth/route.ts

@@ -1,72 +0,0 @@
-import { NextRequest, NextResponse } from 'next/server';
-import { logger } from '@/lib/logger';
-import { getStalwartCredentials } from '@/lib/stalwart/credentials';
-
-/**
- * GET /api/account/stalwart/auth
- * Proxy to Stalwart GET /api/account/auth
- */
-export async function GET(request: NextRequest) {
-  try {
-    const creds = await getStalwartCredentials(request);
-    if (!creds) {
-      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
-    }
-
-    const response = await fetch(`${creds.apiUrl}/api/account/auth`, {
-      method: 'GET',
-      headers: { 'Authorization': creds.authHeader },
-    });
-
-    if (!response.ok) {
-      const text = await response.text();
-      logger.warn('Stalwart auth info failed', { status: response.status });
-      return NextResponse.json(
-        { error: 'Failed to fetch auth info', details: text },
-        { status: response.status }
-      );
-    }
-
-    const data = await response.json();
-    return NextResponse.json(data);
-  } catch (error) {
-    logger.error('Stalwart auth proxy error', { error: error instanceof Error ? error.message : 'Unknown' });
-    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
-  }
-}
-
-/**
- * POST /api/account/stalwart/auth
- * Proxy to Stalwart POST /api/account/auth
- */
-export async function POST(request: NextRequest) {
-  try {
-    const creds = await getStalwartCredentials(request);
-    if (!creds) {
-      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
-    }
-
-    const body = await request.json();
-
-    const response = await fetch(`${creds.apiUrl}/api/account/auth`, {
-      method: 'POST',
-      headers: {
-        'Authorization': creds.authHeader,
-        'Content-Type': 'application/json',
-      },
-      body: JSON.stringify(body),
-    });
-
-    const data = await response.json();
-
-    if (!response.ok) {
-      logger.warn('Stalwart auth update failed', { status: response.status });
-      return NextResponse.json(data, { status: response.status });
-    }
-
-    return NextResponse.json(data);
-  } catch (error) {
-    logger.error('Stalwart auth update proxy error', { error: error instanceof Error ? error.message : 'Unknown' });
-    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
-  }
-}

app/api/account/stalwart/crypto/route.ts

@@ -1,72 +0,0 @@
-import { NextRequest, NextResponse } from 'next/server';
-import { logger } from '@/lib/logger';
-import { getStalwartCredentials } from '@/lib/stalwart/credentials';
-
-/**
- * GET /api/account/stalwart/crypto
- * Proxy to Stalwart GET /api/account/crypto
- */
-export async function GET(request: NextRequest) {
-  try {
-    const creds = await getStalwartCredentials(request);
-    if (!creds) {
-      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
-    }
-
-    const response = await fetch(`${creds.apiUrl}/api/account/crypto`, {
-      method: 'GET',
-      headers: { 'Authorization': creds.authHeader },
-    });
-
-    if (!response.ok) {
-      const text = await response.text();
-      logger.warn('Stalwart crypto info failed', { status: response.status });
-      return NextResponse.json(
-        { error: 'Failed to fetch crypto info', details: text },
-        { status: response.status }
-      );
-    }
-
-    const data = await response.json();
-    return NextResponse.json(data);
-  } catch (error) {
-    logger.error('Stalwart crypto proxy error', { error: error instanceof Error ? error.message : 'Unknown' });
-    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
-  }
-}
-
-/**
- * POST /api/account/stalwart/crypto
- * Proxy to Stalwart POST /api/account/crypto
- */
-export async function POST(request: NextRequest) {
-  try {
-    const creds = await getStalwartCredentials(request);
-    if (!creds) {
-      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
-    }
-
-    const body = await request.json();
-
-    const response = await fetch(`${creds.apiUrl}/api/account/crypto`, {
-      method: 'POST',
-      headers: {
-        'Authorization': creds.authHeader,
-        'Content-Type': 'application/json',
-      },
-      body: JSON.stringify(body),
-    });
-
-    const data = await response.json();
-
-    if (!response.ok) {
-      logger.warn('Stalwart crypto update failed', { status: response.status });
-      return NextResponse.json(data, { status: response.status });
-    }
-
-    return NextResponse.json(data);
-  } catch (error) {
-    logger.error('Stalwart crypto update proxy error', { error: error instanceof Error ? error.message : 'Unknown' });
-    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
-  }
-}

app/api/account/stalwart/jmap/route.ts

@@ -0,0 +1,46 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { logger } from '@/lib/logger';
+import { getStalwartCredentials } from '@/lib/stalwart/credentials';
+
+/**
+ * POST /api/account/stalwart/jmap
+ *
+ * Passthrough to Stalwart's JMAP endpoint using the stored basic-auth
+ * context so the browser does not need access to the user's credentials.
+ *
+ * Body: standard JMAP request `{ using: string[], methodCalls: [...] }`
+ *
+ * In Stalwart 0.16 all management operations (password change, app
+ * passwords, API keys, account settings, etc.) are exposed as JMAP
+ * methods under the `x:` namespace on the same endpoint.
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const creds = await getStalwartCredentials(request);
+    if (!creds) {
+      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+    }
+
+    const body = await request.text();
+
+    const response = await fetch(`${creds.serverUrl}/jmap/`, {
+      method: 'POST',
+      headers: {
+        'Authorization': creds.authHeader,
+        'Content-Type': 'application/json',
+      },
+      body,
+    });
+
+    const responseText = await response.text();
+    return new NextResponse(responseText, {
+      status: response.status,
+      headers: { 'Content-Type': response.headers.get('Content-Type') || 'application/json' },
+    });
+  } catch (error) {
+    logger.error('Stalwart JMAP passthrough error', {
+      error: error instanceof Error ? error.message : 'Unknown',
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/account/stalwart/password/route.ts

@@ -1,83 +0,0 @@
-import { NextRequest, NextResponse } from 'next/server';
-import { cookies } from 'next/headers';
-import { logger } from '@/lib/logger';
-import { encryptSession } from '@/lib/auth/crypto';
-import { SESSION_COOKIE, SESSION_COOKIE_MAX_AGE } from '@/lib/auth/session-cookie';
-import { getStalwartCredentials } from '@/lib/stalwart/credentials';
-
-const COOKIE_OPTIONS = {
-  httpOnly: true,
-  secure: process.env.NODE_ENV === 'production',
-  sameSite: 'lax' as const,
-  path: '/',
-  maxAge: SESSION_COOKIE_MAX_AGE,
-};
-
-/**
- * POST /api/account/stalwart/password
- * Change user password via Stalwart PATCH /api/principal/{name}
- *
- * Body: { currentPassword: string, newPassword: string }
- */
-export async function POST(request: NextRequest) {
-  try {
-    const creds = await getStalwartCredentials(request);
-    if (!creds) {
-      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
-    }
-
-    const { currentPassword, newPassword } = await request.json();
-
-    if (!currentPassword || !newPassword) {
-      return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
-    }
-
-    if (newPassword.length < 8) {
-      return NextResponse.json({ error: 'Password must be at least 8 characters' }, { status: 400 });
-    }
-
-    // Verify current password by attempting to authenticate
-    const verifyAuth = `Basic ${Buffer.from(`${creds.username}:${currentPassword}`).toString('base64')}`;
-    const verifyResponse = await fetch(`${creds.serverUrl}/.well-known/jmap`, {
-      method: 'GET',
-      headers: { 'Authorization': verifyAuth },
-    });
-
-    if (!verifyResponse.ok) {
-      return NextResponse.json({ error: 'Current password is incorrect' }, { status: 403 });
-    }
-
-    // Change password via Stalwart principal API
-    const response = await fetch(`${creds.apiUrl}/api/principal/${encodeURIComponent(creds.username)}`, {
-      method: 'PATCH',
-      headers: {
-        'Authorization': creds.authHeader,
-        'Content-Type': 'application/json',
-      },
-      body: JSON.stringify([
-        { action: 'set', field: 'secrets', value: newPassword },
-      ]),
-    });
-
-    if (!response.ok) {
-      const text = await response.text();
-      logger.warn('Stalwart password change failed', { status: response.status });
-      return NextResponse.json(
-        { error: 'Failed to change password', details: text },
-        { status: response.status }
-      );
-    }
-
-    // If session cookie exists, update it with the new password
-    if (creds.hasSessionCookie) {
-      const newToken = encryptSession(creds.serverUrl, creds.username, newPassword);
-      const cookieStore = await cookies();
-      cookieStore.set(SESSION_COOKIE, newToken, COOKIE_OPTIONS);
-    }
-
-    return NextResponse.json({ ok: true });
-  } catch (error) {
-    logger.error('Stalwart password change proxy error', { error: error instanceof Error ? error.message : 'Unknown' });
-    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
-  }
-}

app/api/account/stalwart/principal/route.ts

@@ -1,81 +0,0 @@
-import { NextRequest, NextResponse } from 'next/server';
-import { logger } from '@/lib/logger';
-import { getStalwartCredentials } from '@/lib/stalwart/credentials';
-
-/**
- * GET /api/account/stalwart/principal
- * Proxy to Stalwart GET /api/principal/{username}
- */
-export async function GET(request: NextRequest) {
-  try {
-    const creds = await getStalwartCredentials(request);
-    if (!creds) {
-      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
-    }
-
-    const response = await fetch(`${creds.apiUrl}/api/principal/${encodeURIComponent(creds.username)}`, {
-      method: 'GET',
-      headers: { 'Authorization': creds.authHeader },
-    });
-
-    if (!response.ok) {
-      const text = await response.text();
-      logger.warn('Stalwart principal fetch failed', { status: response.status });
-      return NextResponse.json(
-        { error: 'Failed to fetch principal', details: text },
-        { status: response.status }
-      );
-    }
-
-    const data = await response.json();
-    return NextResponse.json(data);
-  } catch (error) {
-    logger.error('Stalwart principal proxy error', { error: error instanceof Error ? error.message : 'Unknown' });
-    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
-  }
-}
-
-/**
- * PATCH /api/account/stalwart/principal
- * Proxy to Stalwart PATCH /api/principal/{username}
- * Body: PrincipalUpdateAction[] (array of {action, field, value})
- */
-export async function PATCH(request: NextRequest) {
-  try {
-    const creds = await getStalwartCredentials(request);
-    if (!creds) {
-      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
-    }
-
-    const body = await request.json();
-
-    // Prevent secrets field from being changed through this endpoint (use /password instead)
-    if (Array.isArray(body)) {
-      const hasSecrets = body.some((action: { field?: string }) => action.field === 'secrets');
-      if (hasSecrets) {
-        return NextResponse.json({ error: 'Use /api/account/stalwart/password to change passwords' }, { status: 400 });
-      }
-    }
-
-    const response = await fetch(`${creds.apiUrl}/api/principal/${encodeURIComponent(creds.username)}`, {
-      method: 'PATCH',
-      headers: {
-        'Authorization': creds.authHeader,
-        'Content-Type': 'application/json',
-      },
-      body: JSON.stringify(body),
-    });
-
-    const data = await response.json();
-
-    if (!response.ok) {
-      logger.warn('Stalwart principal update failed', { status: response.status });
-      return NextResponse.json(data, { status: response.status });
-    }
-
-    return NextResponse.json(data);
-  } catch (error) {
-    logger.error('Stalwart principal update proxy error', { error: error instanceof Error ? error.message : 'Unknown' });
-    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
-  }
-}

app/api/account/stalwart/probe/route.ts

@@ -1,44 +0,0 @@
-import { NextRequest, NextResponse } from 'next/server';
-import { logger } from '@/lib/logger';
-import { getStalwartCredentials } from '@/lib/stalwart/credentials';
-
-/**
- * GET /api/account/stalwart/probe
- * Detect whether the JMAP server is Stalwart by probing /api/account/auth
- */
-export async function GET(request: NextRequest) {
-  try {
-    const creds = await getStalwartCredentials(request);
-    if (!creds) {
-      return NextResponse.json({ isStalwart: false });
-    }
-
-    const controller = new AbortController();
-    const timeout = setTimeout(() => controller.abort(), 5000);
-
-    try {
-      const response = await fetch(`${creds.apiUrl}/api/account/auth`, {
-        method: 'GET',
-        headers: { 'Authorization': creds.authHeader },
-        signal: controller.signal,
-      });
-
-      clearTimeout(timeout);
-
-      if (!response.ok) {
-        return NextResponse.json({ isStalwart: false });
-      }
-
-      const data = await response.json();
-      const isStalwart = data.data !== undefined && typeof data.data.otpEnabled === 'boolean';
-
-      return NextResponse.json({ isStalwart });
-    } catch {
-      clearTimeout(timeout);
-      return NextResponse.json({ isStalwart: false });
-    }
-  } catch (error) {
-    logger.error('Stalwart probe error', { error: error instanceof Error ? error.message : 'Unknown' });
-    return NextResponse.json({ isStalwart: false });
-  }
-}

app/api/admin/audit/route.ts

@@ -0,0 +1,27 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth } from '@/lib/admin/session';
+import { readAuditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+
+/**
+ * GET /api/admin/audit - Get paginated audit log entries (admin-protected)
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const page = Math.max(1, parseInt(request.nextUrl.searchParams.get('page') || '1', 10));
+    const limit = Math.min(200, Math.max(1, parseInt(request.nextUrl.searchParams.get('limit') || '50', 10)));
+    const action = request.nextUrl.searchParams.get('action') || undefined;
+
+    const { entries, total } = await readAuditLog(page, limit, action);
+
+    return NextResponse.json({ entries, total, page, limit }, {
+      headers: { 'Cache-Control': 'no-store' },
+    });
+  } catch (error) {
+    logger.error('Audit log read error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/branding/[filename]/route.ts

@@ -0,0 +1,77 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { readFile, stat } from 'node:fs/promises';
+import path from 'node:path';
+import { getConfigDir } from '@/lib/admin/paths';
+
+function getBrandingDir(): string {
+  return path.join(getConfigDir(), 'branding');
+}
+
+const MIME_TYPES: Record<string, string> = {
+  '.svg': 'image/svg+xml',
+  '.png': 'image/png',
+  '.jpg': 'image/jpeg',
+  '.jpeg': 'image/jpeg',
+  '.webp': 'image/webp',
+  '.ico': 'image/x-icon',
+};
+
+/**
+ * GET /api/admin/branding/[filename] - Serve uploaded branding images
+ *
+ * This endpoint is public (no admin auth) so browsers can load images.
+ * Only files in the branding directory are served; directory traversal is prevented.
+ */
+export async function GET(
+  _request: NextRequest,
+  { params }: { params: Promise<{ filename: string }> },
+) {
+  try {
+    const { filename } = await params;
+
+    // Sanitize: only allow basename, no path separators
+    const safe = path.basename(filename);
+    if (safe !== filename || filename.includes('..')) {
+      return NextResponse.json({ error: 'Invalid filename' }, { status: 400 });
+    }
+
+    const ext = path.extname(safe).toLowerCase();
+    const contentType = MIME_TYPES[ext];
+    if (!contentType) {
+      return NextResponse.json({ error: 'Unsupported file type' }, { status: 400 });
+    }
+
+    const filePath = path.join(getBrandingDir(), safe);
+
+    // Ensure resolved path is still within getBrandingDir()
+    const resolved = path.resolve(filePath);
+    if (!resolved.startsWith(path.resolve(getBrandingDir()))) {
+      return NextResponse.json({ error: 'Invalid filename' }, { status: 400 });
+    }
+
+    const fileStat = await stat(resolved).catch(() => null);
+    if (!fileStat || !fileStat.isFile()) {
+      return NextResponse.json({ error: 'Not found' }, { status: 404 });
+    }
+
+    const buffer = await readFile(resolved);
+
+    // SVG can carry inline <script> and event handlers that execute when the
+    // file is fetched as a top-level document. Defense in depth on top of
+    // admin-only upload: nosniff blocks MIME confusion, the CSP forces a
+    // sandboxed unique origin so any script in an SVG is inert and cannot
+    // touch app cookies or storage.
+    return new NextResponse(buffer, {
+      headers: {
+        'Content-Type': contentType,
+        'Cache-Control': 'public, max-age=3600, must-revalidate',
+        'Content-Length': String(buffer.length),
+        'X-Content-Type-Options': 'nosniff',
+        'Content-Security-Policy':
+          "default-src 'none'; img-src 'self' data:; style-src 'unsafe-inline'; sandbox",
+      },
+    });
+  } catch {
+    return NextResponse.json({ error: 'Not found' }, { status: 404 });
+  }
+}

app/api/admin/branding/route.ts

@@ -0,0 +1,150 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { configManager } from '@/lib/admin/config-manager';
+import { getConfigDir } from '@/lib/admin/paths';
+import { logger } from '@/lib/logger';
+import { writeFile, unlink, mkdir } from 'node:fs/promises';
+import { existsSync } from 'node:fs';
+import path from 'node:path';
+
+function getBrandingDir(): string {
+  return path.join(getConfigDir(), 'branding');
+}
+const MAX_FILE_SIZE = 2 * 1024 * 1024; // 2 MB
+const ALLOWED_MIME_TYPES = new Set([
+  'image/svg+xml',
+  'image/png',
+  'image/jpeg',
+  'image/webp',
+  'image/x-icon',
+  'image/vnd.microsoft.icon',
+]);
+
+/** Slots that correspond to branding config keys */
+const VALID_SLOTS = new Set([
+  'faviconUrl',
+  'pwaIconUrl',
+  'appLogoLightUrl',
+  'appLogoDarkUrl',
+  'loginLogoLightUrl',
+  'loginLogoDarkUrl',
+]);
+
+function sanitizeFilename(name: string): string {
+  // Strip directory traversal, keep only safe chars
+  return path.basename(name).replace(/[^a-zA-Z0-9._-]/g, '_');
+}
+
+/**
+ * POST /api/admin/branding - Upload a branding image file
+ *
+ * Expects multipart/form-data with:
+ *   - file: the image file
+ *   - slot: which branding field this is for (e.g. "faviconUrl")
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const formData = await request.formData();
+    const file = formData.get('file') as File | null;
+    const slot = formData.get('slot') as string | null;
+
+    if (!file || !slot) {
+      return NextResponse.json({ error: 'Missing file or slot' }, { status: 400 });
+    }
+
+    if (!VALID_SLOTS.has(slot)) {
+      return NextResponse.json({ error: `Invalid slot: ${slot}` }, { status: 400 });
+    }
+
+    if (file.size > MAX_FILE_SIZE) {
+      return NextResponse.json({ error: 'File too large (max 2 MB)' }, { status: 400 });
+    }
+
+    if (!ALLOWED_MIME_TYPES.has(file.type)) {
+      return NextResponse.json(
+        { error: `Unsupported file type: ${file.type}. Allowed: SVG, PNG, JPEG, WebP, ICO` },
+        { status: 400 },
+      );
+    }
+
+    // Determine extension from mime type
+    const extMap: Record<string, string> = {
+      'image/svg+xml': '.svg',
+      'image/png': '.png',
+      'image/jpeg': '.jpg',
+      'image/webp': '.webp',
+      'image/x-icon': '.ico',
+      'image/vnd.microsoft.icon': '.ico',
+    };
+    const ext = extMap[file.type] || '.png';
+    const safeName = sanitizeFilename(`${slot}${ext}`);
+    const filePath = path.join(getBrandingDir(), safeName);
+
+    // Ensure branding directory exists
+    if (!existsSync(getBrandingDir())) {
+      await mkdir(getBrandingDir(), { recursive: true });
+    }
+
+    // Write file to disk
+    const buffer = Buffer.from(await file.arrayBuffer());
+    await writeFile(filePath, buffer);
+
+    // Update config to point to the served URL
+    const servedUrl = `/api/admin/branding/${safeName}`;
+    await configManager.ensureLoaded();
+    await configManager.setAdminConfig({ [slot]: servedUrl });
+
+    await auditLog('branding_upload', { slot, filename: safeName, size: file.size, mimeType: file.type }, ip);
+
+    return NextResponse.json({ url: servedUrl, filename: safeName });
+  } catch (error) {
+    logger.error('Branding upload error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * DELETE /api/admin/branding - Remove an uploaded branding file
+ *
+ * Expects JSON body: { slot: string }
+ */
+export async function DELETE(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const { slot } = await request.json();
+
+    if (!slot || !VALID_SLOTS.has(slot)) {
+      return NextResponse.json({ error: 'Invalid or missing slot' }, { status: 400 });
+    }
+
+    // Find and remove matching files for this slot
+    const possibleExts = ['.svg', '.png', '.jpg', '.webp', '.ico'];
+    let removed = false;
+    for (const ext of possibleExts) {
+      const filePath = path.join(getBrandingDir(), `${slot}${ext}`);
+      if (existsSync(filePath)) {
+        await unlink(filePath);
+        removed = true;
+      }
+    }
+
+    // Clear the config override so it falls back to default/env
+    await configManager.ensureLoaded();
+    await configManager.removeAdminOverride(slot);
+
+    await auditLog('branding_delete', { slot, fileRemoved: removed }, ip);
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    logger.error('Branding delete error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/change-password/route.ts

@@ -0,0 +1,37 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { changeAdminPassword } from '@/lib/admin/password';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+
+/**
+ * POST /api/admin/change-password - Change admin password
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const { currentPassword, newPassword } = await request.json();
+
+    if (!currentPassword || !newPassword || typeof currentPassword !== 'string' || typeof newPassword !== 'string') {
+      return NextResponse.json({ error: 'Both current and new password are required' }, { status: 400 });
+    }
+
+    if (newPassword.length < 8) {
+      return NextResponse.json({ error: 'New password must be at least 8 characters' }, { status: 400 });
+    }
+
+    const success = await changeAdminPassword(currentPassword, newPassword);
+    if (!success) {
+      return NextResponse.json({ error: 'Current password is incorrect' }, { status: 401 });
+    }
+
+    await auditLog('admin.change-password', {}, ip);
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    logger.error('Admin change password error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/config/route.ts

@@ -0,0 +1,135 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { configManager } from '@/lib/admin/config-manager';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { CONFIG_ENV_MAP, SENSITIVE_CONFIG_KEYS } from '@/lib/admin/types';
+import { parseJmapServers } from '@/lib/admin/jmap-servers';
+import { logger } from '@/lib/logger';
+
+// Strings that count as "no real secret configured" - used so the dashboard
+// can warn about a placeholder session secret without us ever returning the
+// raw value to the client.
+const SENSITIVE_PLACEHOLDERS = new Set(['your-secret-key-here']);
+
+/**
+ * GET /api/admin/config - Get full config with sources (admin-protected)
+ *
+ * Sensitive keys (sessionSecret, oauthClientSecret) are returned with
+ * `value` omitted and a `hasValue` boolean instead. An admin session is
+ * enough to read every other config knob; the secrets themselves stay on
+ * the server so that an XSS or session-theft can't lift them in one
+ * request and forge admin/user session cookies offline.
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    await configManager.ensureLoaded();
+    const config = configManager.getAllWithSources();
+
+    const safe: Record<string, { value?: unknown; source: 'admin' | 'env' | 'default'; hasValue?: boolean }> = {};
+    for (const [key, entry] of Object.entries(config)) {
+      if (SENSITIVE_CONFIG_KEYS.has(key)) {
+        const v = entry.value;
+        const hasValue =
+          typeof v === 'string' && v.length > 0 && !SENSITIVE_PLACEHOLDERS.has(v);
+        safe[key] = { source: entry.source, hasValue };
+      } else {
+        safe[key] = entry;
+      }
+    }
+
+    return NextResponse.json(safe, {
+      headers: { 'Cache-Control': 'no-store' },
+    });
+  } catch (error) {
+    logger.error('Admin config read error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * PATCH /api/admin/config - Update config overrides (admin-protected)
+ */
+export async function PATCH(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const updates = await request.json();
+
+    if (!updates || typeof updates !== 'object' || Array.isArray(updates)) {
+      return NextResponse.json({ error: 'Request body must be an object' }, { status: 400 });
+    }
+
+    // Validate keys
+    const validKeys = Object.keys(CONFIG_ENV_MAP);
+    const invalidKeys = Object.keys(updates).filter(k => !validKeys.includes(k));
+    if (invalidKeys.length > 0) {
+      return NextResponse.json({ error: `Unknown config keys: ${invalidKeys.join(', ')}` }, { status: 400 });
+    }
+
+    // Normalize jmapServers: pass through the parser so invalid entries are
+    // rejected (bad ids, duplicate ids, non-HTTP URLs) before they're persisted.
+    if ('jmapServers' in updates) {
+      const incoming = updates.jmapServers;
+      if (incoming != null && !Array.isArray(incoming)) {
+        return NextResponse.json({ error: 'jmapServers must be an array' }, { status: 400 });
+      }
+      const sanitized = parseJmapServers(incoming);
+      const incomingCount = Array.isArray(incoming) ? incoming.length : 0;
+      if (sanitized.length !== incomingCount) {
+        return NextResponse.json({
+          error: 'One or more jmapServers entries are invalid (each needs a unique id, label, and HTTP(S) url).',
+        }, { status: 400 });
+      }
+      updates.jmapServers = sanitized;
+    }
+
+    // Get old values for audit
+    const oldValues: Record<string, unknown> = {};
+    for (const key of Object.keys(updates)) {
+      oldValues[key] = configManager.get(key);
+    }
+
+    await configManager.setAdminConfig(updates);
+    await auditLog('config.update', { changes: Object.keys(updates).map(k => ({ key: k, old: oldValues[k], new: updates[k] })) }, ip);
+
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    logger.error('Admin config update error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * DELETE /api/admin/config - Remove admin override for a key (revert to env/default)
+ */
+export async function DELETE(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const { key } = await request.json();
+
+    if (!key || typeof key !== 'string') {
+      return NextResponse.json({ error: 'Key is required' }, { status: 400 });
+    }
+
+    if (!CONFIG_ENV_MAP[key]) {
+      return NextResponse.json({ error: `Unknown config key: ${key}` }, { status: 400 });
+    }
+
+    const oldValue = configManager.get(key);
+    await configManager.removeAdminOverride(key);
+    await auditLog('config.revert', { key, oldValue }, ip);
+
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    logger.error('Admin config revert error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/marketplace/[slug]/route.ts

@@ -0,0 +1,229 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth } from '@/lib/admin/session';
+import { logger } from '@/lib/logger';
+import {
+  getPluginRegistry,
+  getThemeRegistry,
+} from '@/lib/admin/plugin-registry';
+import JSZip from 'jszip';
+import { MAX_PLUGIN_SIZE, MAX_THEME_SIZE } from '@/lib/plugin-types';
+import { configManager } from '@/lib/admin/config-manager';
+
+async function getDirectoryUrl(): Promise<string> {
+  await configManager.ensureLoaded();
+  return configManager.get<string>('extensionDirectoryUrl') || 'https://extensions.bulwarkmail.org';
+}
+
+const MAX_PREVIEW_SOURCE_LEN = 100_000;
+
+/**
+ * GET /api/admin/marketplace/[slug]
+ * Returns full preview info for an extension: directory metadata,
+ * the bundle's manifest, a (truncated) source preview, and install status.
+ * Lets admins audit what they're about to install before pressing the button.
+ */
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ slug: string }> },
+) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const { slug } = await params;
+    const directoryUrl = await getDirectoryUrl();
+
+    // 1. Extension metadata + screenshots + theme previews from the directory
+    const detailUrl = new URL(`/api/v1/extension/${encodeURIComponent(slug)}`, directoryUrl);
+    const detailRes = await fetch(detailUrl.toString(), {
+      headers: { Accept: 'application/json' },
+      signal: AbortSignal.timeout(10000),
+    });
+
+    if (!detailRes.ok) {
+      const status = detailRes.status === 404 ? 404 : 502;
+      return NextResponse.json(
+        { error: status === 404 ? 'Extension not found' : 'Directory request failed' },
+        { status },
+      );
+    }
+
+    const detailJson = await detailRes.json();
+    const extension = detailJson.data as Record<string, unknown> | undefined;
+    if (!extension) {
+      return NextResponse.json({ error: 'Extension not found' }, { status: 404 });
+    }
+
+    const type = extension.type as 'plugin' | 'theme';
+    const latestVersion = (extension.latestVersion as { version?: string } | null)?.version
+      ?? null;
+
+    // 2. Pull the bundle so we can show what's actually inside.
+    let manifest: Record<string, unknown> | null = null;
+    let sourcePreview: { name: string; content: string; truncated: boolean } | null = null;
+    let bundleError: string | null = null;
+    let bundleSize = 0;
+
+    if (latestVersion) {
+      try {
+        const bundleUrl = new URL(
+          `/api/v1/bundle/${encodeURIComponent(slug)}/${encodeURIComponent(latestVersion)}`,
+          directoryUrl,
+        );
+        const bundleRes = await fetch(bundleUrl.toString(), {
+          signal: AbortSignal.timeout(30000),
+        });
+
+        if (!bundleRes.ok) {
+          bundleError = `Bundle download failed (${bundleRes.status})`;
+        } else {
+          const buffer = await bundleRes.arrayBuffer();
+          bundleSize = buffer.byteLength;
+          const maxSize = type === 'theme' ? MAX_THEME_SIZE : MAX_PLUGIN_SIZE;
+          if (buffer.byteLength > maxSize) {
+            bundleError = `Bundle exceeds ${type === 'theme' ? '1 MB' : '5 MB'} size limit`;
+          } else {
+            const zip = await JSZip.loadAsync(buffer);
+
+            // Detect optional root directory inside the ZIP.
+            const entries = Object.keys(zip.files);
+            const topDirs = new Set(entries.map((e) => e.split('/')[0]));
+            let root = '';
+            if (topDirs.size === 1) {
+              const dir = [...topDirs][0];
+              if (zip.files[dir + '/'] || entries.some((e) => e.startsWith(dir + '/'))) {
+                root = dir + '/';
+              }
+            }
+
+            const manifestFile = zip.file(root + 'manifest.json');
+            if (!manifestFile) {
+              bundleError = 'Bundle missing manifest.json';
+            } else {
+              try {
+                manifest = JSON.parse(await manifestFile.async('string'));
+              } catch {
+                bundleError = 'Invalid manifest.json in bundle';
+              }
+            }
+
+            if (manifest) {
+              if (type === 'theme') {
+                const cssFile = zip.file(root + 'theme.css');
+                if (cssFile) {
+                  const css = await cssFile.async('string');
+                  sourcePreview = {
+                    name: 'theme.css',
+                    content: css.length > MAX_PREVIEW_SOURCE_LEN
+                      ? css.slice(0, MAX_PREVIEW_SOURCE_LEN)
+                      : css,
+                    truncated: css.length > MAX_PREVIEW_SOURCE_LEN,
+                  };
+                }
+              } else {
+                const entrypoint = (manifest.entrypoint as string) || 'index.js';
+                const jsFile = zip.file(root + entrypoint);
+                if (jsFile) {
+                  const code = await jsFile.async('string');
+                  sourcePreview = {
+                    name: entrypoint,
+                    content: code.length > MAX_PREVIEW_SOURCE_LEN
+                      ? code.slice(0, MAX_PREVIEW_SOURCE_LEN)
+                      : code,
+                    truncated: code.length > MAX_PREVIEW_SOURCE_LEN,
+                  };
+                }
+              }
+            }
+          }
+        }
+      } catch (err) {
+        bundleError = err instanceof Error ? err.message : 'Failed to read bundle';
+      }
+    } else {
+      bundleError = 'Extension has no published version';
+    }
+
+    // 3. Install status (slug is used as the registry id at install time)
+    const [pluginRegistry, themeRegistry] = await Promise.all([
+      getPluginRegistry(),
+      getThemeRegistry(),
+    ]);
+    const installedEntry = type === 'theme'
+      ? themeRegistry.themes.find((t) => t.id === slug)
+      : pluginRegistry.plugins.find((p) => p.id === slug);
+    const installed = installedEntry !== undefined;
+    const installedVersion = installedEntry?.version ?? null;
+
+    // 4. Build screenshot URLs (proxy through the directory's public files endpoint).
+    const screenshots = Array.isArray(extension.screenshots)
+      ? (extension.screenshots as Array<{ path: string; altText?: string | null }>).map((s) => ({
+          url: new URL(`/api/v1/files/${s.path}`, directoryUrl).toString(),
+          altText: s.altText ?? null,
+        }))
+      : [];
+
+    // Strip the heavy `manifest` blob from versions when echoing the directory data.
+    const versions = Array.isArray(extension.versions)
+      ? (extension.versions as Array<Record<string, unknown>>).map((v) => ({
+          version: v.version,
+          changelog: v.changelog,
+          bundleSize: v.bundleSize,
+          minAppVersion: v.minAppVersion,
+          publishedAt: v.publishedAt,
+          permissions: v.permissions,
+        }))
+      : [];
+
+    const fileUrl = (path: unknown): string | null =>
+      typeof path === 'string' && path
+        ? new URL(`/api/v1/files/${path}`, directoryUrl).toString()
+        : null;
+
+    return NextResponse.json(
+      {
+        extension: {
+          slug: extension.slug,
+          name: extension.name,
+          type: extension.type,
+          pluginType: extension.pluginType ?? null,
+          description: extension.description,
+          longDescription: extension.longDescription ?? null,
+          tags: extension.tags ?? [],
+          permissions: extension.permissions ?? [],
+          totalDownloads: extension.totalDownloads ?? 0,
+          featured: extension.featured ?? false,
+          githubRepo: extension.githubRepo ?? null,
+          license: extension.license ?? null,
+          minAppVersion: extension.minAppVersion ?? null,
+          iconUrl: fileUrl(extension.iconPath),
+          bannerUrl: fileUrl(extension.bannerPath),
+          author: extension.author ?? null,
+          latestVersion,
+          versions,
+          screenshots,
+          themePreviews: extension.themePreviews ?? [],
+          createdAt: extension.createdAt ?? null,
+          updatedAt: extension.updatedAt ?? null,
+        },
+        bundle: {
+          manifest,
+          source: sourcePreview,
+          size: bundleSize,
+          error: bundleError,
+        },
+        installed,
+        installedVersion,
+      },
+      { headers: { 'Cache-Control': 'no-store' } },
+    );
+  } catch (error) {
+    logger.error('Marketplace preview error', {
+      error: error instanceof Error ? error.message : 'Unknown error',
+    });
+    return NextResponse.json(
+      { error: 'Failed to load preview' },
+      { status: 502 },
+    );
+  }
+}

app/api/admin/marketplace/route.ts

@@ -0,0 +1,392 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import {
+  savePlugin,
+  saveTheme,
+  getPlugin,
+  getTheme,
+  getPluginRegistry,
+  getThemeRegistry,
+  type ServerPlugin,
+  type ServerTheme,
+} from '@/lib/admin/plugin-registry';
+import {
+  sanitizeFrameOrigins,
+  sanitizeHttpOrigins,
+  sanitizeApiPostPaths,
+  invalidateFrameOriginsCache,
+} from '@/lib/admin/csp-frame-origins';
+import JSZip from 'jszip';
+import { MAX_PLUGIN_SIZE, MAX_THEME_SIZE, ALL_PERMISSIONS, ALLOWED_PLUGIN_FILES } from '@/lib/plugin-types';
+import { sanitizeThemeCSS, validateThemeCSSSafety } from '@/lib/theme-loader';
+import { configManager } from '@/lib/admin/config-manager';
+
+async function getDirectoryUrl(): Promise<string> {
+  await configManager.ensureLoaded();
+  return configManager.get<string>('extensionDirectoryUrl') || 'https://extensions.bulwarkmail.org';
+}
+
+/**
+ * GET /api/admin/marketplace - Search/browse the extension directory
+ * Proxies to the extension directory API
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const directoryUrl = await getDirectoryUrl();
+    const { searchParams } = request.nextUrl;
+    const url = new URL('/api/v1/extensions', directoryUrl);
+
+    // Forward all search params
+    for (const [key, value] of searchParams.entries()) {
+      url.searchParams.set(key, value);
+    }
+
+    const res = await fetch(url.toString(), {
+      headers: { 'Accept': 'application/json' },
+      signal: AbortSignal.timeout(10000),
+    });
+
+    if (!res.ok) {
+      return NextResponse.json(
+        { error: 'Failed to fetch from extension directory' },
+        { status: 502 }
+      );
+    }
+
+    const data = await res.json();
+
+    // Enrich with install status
+    const [pluginRegistry, themeRegistry] = await Promise.all([
+      getPluginRegistry(),
+      getThemeRegistry(),
+    ]);
+
+    const installedPluginVersions = new Map(
+      pluginRegistry.plugins.map(p => [p.id, p.version] as const),
+    );
+    const installedThemeVersions = new Map(
+      themeRegistry.themes.map(t => [t.id, t.version] as const),
+    );
+
+    const fileUrl = (path: unknown): string | null =>
+      typeof path === 'string' && path
+        ? new URL(`/api/v1/files/${path}`, directoryUrl).toString()
+        : null;
+
+    if (data.data) {
+      data.data = data.data.map((ext: Record<string, unknown>) => {
+        const slug = ext.slug as string;
+        const installedVersion = ext.type === 'theme'
+          ? installedThemeVersions.get(slug) ?? null
+          : installedPluginVersions.get(slug) ?? null;
+        return {
+          ...ext,
+          iconUrl: fileUrl(ext.iconPath),
+          bannerUrl: fileUrl(ext.bannerPath),
+          installed: installedVersion !== null,
+          installedVersion,
+        };
+      });
+    }
+
+    return NextResponse.json(data, {
+      headers: { 'Cache-Control': 'no-store' },
+    });
+  } catch (error) {
+    logger.error('Marketplace search error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Failed to connect to extension directory' }, { status: 502 });
+  }
+}
+
+/**
+ * POST /api/admin/marketplace - Install an extension from the directory
+ * Body: { slug: string, version: string, type: 'plugin' | 'theme' }
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const { slug, version, type } = await request.json();
+
+    if (!slug || !version || !type) {
+      return NextResponse.json({ error: 'Missing slug, version, or type' }, { status: 400 });
+    }
+
+    if (type !== 'plugin' && type !== 'theme') {
+      return NextResponse.json({ error: 'Invalid type' }, { status: 400 });
+    }
+
+    // Download the bundle from the directory
+    const directoryUrl = await getDirectoryUrl();
+    const bundleUrl = new URL(`/api/v1/bundle/${encodeURIComponent(slug)}/${encodeURIComponent(version)}`, directoryUrl);
+    const bundleRes = await fetch(bundleUrl.toString(), {
+      signal: AbortSignal.timeout(30000),
+    });
+
+    if (!bundleRes.ok) {
+      return NextResponse.json(
+        { error: `Failed to download bundle: ${bundleRes.status}` },
+        { status: 502 }
+      );
+    }
+
+    const buffer = await bundleRes.arrayBuffer();
+    const maxSize = type === 'theme' ? MAX_THEME_SIZE : MAX_PLUGIN_SIZE;
+
+    if (buffer.byteLength > maxSize) {
+      return NextResponse.json(
+        { error: `Bundle exceeds ${type === 'theme' ? '1 MB' : '5 MB'} size limit` },
+        { status: 400 }
+      );
+    }
+
+    // Parse the ZIP
+    let zip: JSZip;
+    try {
+      zip = await JSZip.loadAsync(buffer);
+    } catch {
+      return NextResponse.json({ error: 'Invalid ZIP file from directory' }, { status: 400 });
+    }
+
+    // Find root directory
+    const entries = Object.keys(zip.files);
+    const topDirs = new Set(entries.map(e => e.split('/')[0]));
+    let root = '';
+    if (topDirs.size === 1) {
+      const dir = [...topDirs][0];
+      if (zip.files[dir + '/'] || entries.some(e => e.startsWith(dir + '/'))) {
+        root = dir + '/';
+      }
+    }
+
+    // Read manifest
+    const manifestFile = zip.file(root + 'manifest.json');
+    if (!manifestFile) {
+      return NextResponse.json({ error: 'Bundle missing manifest.json' }, { status: 400 });
+    }
+
+    let manifest: Record<string, unknown>;
+    try {
+      manifest = JSON.parse(await manifestFile.async('string'));
+    } catch {
+      return NextResponse.json({ error: 'Invalid manifest.json in bundle' }, { status: 400 });
+    }
+
+    const now = new Date().toISOString();
+
+    // Resolve and strictly validate the id used as a filename. Marketplace
+    // bundles are authored by a third-party publisher; without this an id
+    // like "../../foo" causes savePlugin/saveTheme to write outside the
+    // plugins/themes dir via path.join.
+    const resolvedId = typeof manifest.id === 'string' && manifest.id ? manifest.id : slug;
+    if (typeof resolvedId !== 'string' || !/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(resolvedId)) {
+      return NextResponse.json(
+        { error: 'Invalid id: must be lowercase alphanumeric with hyphens, min 2 chars' },
+        { status: 400 },
+      );
+    }
+
+    if (type === 'theme') {
+      // Read theme.css
+      const cssFile = zip.file(root + 'theme.css');
+      if (!cssFile) {
+        return NextResponse.json({ error: 'Theme bundle missing theme.css' }, { status: 400 });
+      }
+
+      let css = await cssFile.async('string');
+
+      // Validate and sanitize CSS
+      const warnings: string[] = [];
+      const safety = validateThemeCSSSafety(css);
+      if (!safety.valid) {
+        const sanitized = sanitizeThemeCSS(css);
+        css = sanitized.css;
+        warnings.push(...sanitized.warnings);
+      }
+
+      const existingTheme = await getTheme(resolvedId);
+      const isUpdate = existingTheme !== null;
+
+      const theme: ServerTheme = {
+        id: resolvedId,
+        name: (manifest.name as string) || slug,
+        // Prefer the directory-published version (what we requested) over
+        // manifest.version. Publishers sometimes forget to bump the version
+        // inside the bundle's manifest.json; trusting it would make the
+        // update never appear to "stick" — the registry would keep showing
+        // the older version even after a successful update.
+        version: version || (manifest.version as string),
+        author: (manifest.author as string) || 'Unknown',
+        description: (manifest.description as string) || '',
+        variants: (manifest.variants as string[]) || ['light', 'dark'],
+        enabled: existingTheme?.enabled ?? true,
+        ...(existingTheme?.forceEnabled !== undefined
+          ? { forceEnabled: existingTheme.forceEnabled }
+          : {}),
+        installedAt: existingTheme?.installedAt ?? now,
+        updatedAt: now,
+      };
+
+      await saveTheme(theme, css);
+      await auditLog(
+        isUpdate ? 'marketplace.update_theme' : 'marketplace.install_theme',
+        {
+          id: theme.id,
+          name: theme.name,
+          version: theme.version,
+          slug,
+          ...(isUpdate ? { previousVersion: existingTheme.version } : {}),
+        },
+        ip,
+      );
+
+      return NextResponse.json({ success: true, theme, warnings, updated: isUpdate });
+    } else {
+      // Plugin installation
+      // Read entrypoint JS
+      const entrypoint = (manifest.entrypoint as string) || 'index.js';
+      const jsFile = zip.file(root + entrypoint);
+      if (!jsFile) {
+        return NextResponse.json({ error: `Bundle missing entrypoint: ${entrypoint}` }, { status: 400 });
+      }
+
+      const code = await jsFile.async('string');
+
+      // Block plugins with dangerous JS patterns
+      const DANGEROUS_JS_PATTERNS = [
+        { pattern: /\beval\s*\(/g, label: 'eval()' },
+        { pattern: /\bnew\s+Function\s*\(/g, label: 'new Function()' },
+        { pattern: /document\.cookie/g, label: 'document.cookie' },
+        { pattern: /document\.write/g, label: 'document.write' },
+        { pattern: /innerHTML\s*=/g, label: 'innerHTML assignment' },
+      ];
+      const dangerousFindings: string[] = [];
+      for (const { pattern, label } of DANGEROUS_JS_PATTERNS) {
+        if (pattern.test(code)) dangerousFindings.push(label);
+        pattern.lastIndex = 0;
+      }
+      if (dangerousFindings.length > 0) {
+        return NextResponse.json(
+          { error: `Plugin rejected: contains ${dangerousFindings.join(', ')}. These patterns are not allowed for security reasons.` },
+          { status: 400 },
+        );
+      }
+
+      // Validate permissions
+      const permissions = Array.isArray(manifest.permissions) ? manifest.permissions as string[] : [];
+      const validPerms = new Set(ALL_PERMISSIONS as readonly string[]);
+      const unknownPerms = permissions.filter(p => !validPerms.has(p));
+
+      const warnings: string[] = [];
+      if (unknownPerms.length > 0) {
+        warnings.push(`Unknown permissions: ${unknownPerms.join(', ')}`);
+      }
+
+      // Plugins may declare iframe origins they need for embedded content.
+      // Anything that doesn't pass strict origin validation is silently
+      // dropped - the plugin still installs, but those origins are not
+      // added to the host CSP.
+      const declaredFrameOrigins = sanitizeFrameOrigins(manifest.frameOrigins);
+      const droppedFrameOrigins = Array.isArray(manifest.frameOrigins)
+        ? (manifest.frameOrigins as unknown[]).filter(
+            (v) => typeof v !== 'string' || !declaredFrameOrigins.includes(v),
+          )
+        : [];
+      if (droppedFrameOrigins.length > 0) {
+        warnings.push(
+          `Ignored invalid frameOrigins: ${droppedFrameOrigins.join(', ')}`,
+        );
+      }
+
+      const declaredHttpOrigins = sanitizeHttpOrigins(manifest.httpOrigins);
+      const droppedHttpOrigins = Array.isArray(manifest.httpOrigins)
+        ? (manifest.httpOrigins as unknown[]).filter(
+            (v) => typeof v !== 'string' || !declaredHttpOrigins.includes(v),
+          )
+        : [];
+      if (droppedHttpOrigins.length > 0) {
+        warnings.push(
+          `Ignored invalid httpOrigins: ${droppedHttpOrigins.join(', ')}`,
+        );
+      }
+
+      const declaredApiPostPaths = sanitizeApiPostPaths(manifest.apiPostPaths);
+      const droppedApiPostPaths = Array.isArray(manifest.apiPostPaths)
+        ? (manifest.apiPostPaths as unknown[]).filter(
+            (v) => typeof v !== 'string' || !declaredApiPostPaths.includes(v),
+          )
+        : [];
+      if (droppedApiPostPaths.length > 0) {
+        warnings.push(
+          `Ignored invalid apiPostPaths: ${droppedApiPostPaths.join(', ')}`,
+        );
+      }
+
+      const existingPlugin = await getPlugin(resolvedId);
+      const isUpdate = existingPlugin !== null;
+
+      const plugin: ServerPlugin = {
+        id: resolvedId,
+        name: (manifest.name as string) || slug,
+        // See theme branch: trust the directory-published version, not
+        // manifest.version, so updates actually stick in the registry.
+        version: version || (manifest.version as string),
+        author: (manifest.author as string) || 'Unknown',
+        description: (manifest.description as string) || '',
+        type: (manifest.type as string) || 'hook',
+        permissions,
+        entrypoint,
+        enabled: existingPlugin?.enabled ?? true,
+        ...(existingPlugin?.forceEnabled !== undefined
+          ? { forceEnabled: existingPlugin.forceEnabled }
+          : {}),
+        installedAt: existingPlugin?.installedAt ?? now,
+        updatedAt: now,
+        ...(manifest.configSchema && typeof manifest.configSchema === 'object'
+          ? { configSchema: manifest.configSchema as ServerPlugin['configSchema'] }
+          : {}),
+        ...(manifest.settingsSchema && typeof manifest.settingsSchema === 'object'
+          ? { settingsSchema: manifest.settingsSchema as ServerPlugin['settingsSchema'] }
+          : {}),
+        ...(declaredFrameOrigins.length > 0
+          ? { frameOrigins: declaredFrameOrigins }
+          : {}),
+        ...(declaredHttpOrigins.length > 0
+          ? { httpOrigins: declaredHttpOrigins }
+          : {}),
+        ...(declaredApiPostPaths.length > 0
+          ? { apiPostPaths: declaredApiPostPaths }
+          : {}),
+      };
+
+      await savePlugin(plugin, code);
+      invalidateFrameOriginsCache();
+      await auditLog(
+        isUpdate ? 'marketplace.update_plugin' : 'marketplace.install_plugin',
+        {
+          id: plugin.id,
+          name: plugin.name,
+          version: plugin.version,
+          slug,
+          frameOrigins: declaredFrameOrigins,
+          httpOrigins: declaredHttpOrigins,
+          apiPostPaths: declaredApiPostPaths,
+          ...(isUpdate ? { previousVersion: existingPlugin.version } : {}),
+        },
+        ip,
+      );
+
+      return NextResponse.json({ success: true, plugin, warnings, updated: isUpdate });
+    }
+  } catch (error) {
+    logger.error('Marketplace install error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Installation failed' }, { status: 500 });
+  }
+}

app/api/admin/oauth/setup/route.ts

@@ -0,0 +1,253 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { randomBytes } from 'node:crypto';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { getStalwartCredentials } from '@/lib/stalwart/credentials';
+import { configManager } from '@/lib/admin/config-manager';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import { locales as ALL_LOCALES } from '@/i18n/routing';
+
+const CLIENT_ID = 'bulwark-webmail';
+const CLIENT_DESCRIPTION = 'Bulwark Webmail (auto-configured)';
+const JMAP_TIMEOUT_MS = 10_000;
+
+interface JmapMethodCall {
+  using: string[];
+  methodCalls: Array<[string, Record<string, unknown>, string]>;
+}
+
+interface JmapMethodResponse {
+  methodResponses?: Array<[string, Record<string, unknown>, string]>;
+}
+
+async function fetchWithTimeout(url: string, init: Parameters<typeof fetch>[1]): Promise<Response> {
+  const controller = new AbortController();
+  const timer = setTimeout(() => controller.abort(), JMAP_TIMEOUT_MS);
+  try {
+    return await fetch(url, { ...init, signal: controller.signal });
+  } finally {
+    clearTimeout(timer);
+  }
+}
+
+async function jmapCall(
+  serverUrl: string,
+  authHeader: string,
+  body: JmapMethodCall,
+): Promise<JmapMethodResponse> {
+  const res = await fetchWithTimeout(`${serverUrl}/jmap/`, {
+    method: 'POST',
+    headers: { 'Authorization': authHeader, 'Content-Type': 'application/json' },
+    body: JSON.stringify(body),
+  });
+  if (!res.ok) {
+    const text = await res.text().catch(() => '');
+    throw new Error(`JMAP HTTP ${res.status} ${text.slice(0, 200)}`);
+  }
+  return res.json() as Promise<JmapMethodResponse>;
+}
+
+async function getStalwartAccountId(
+  serverUrl: string,
+  authHeader: string,
+): Promise<string | null> {
+  const res = await fetchWithTimeout(`${serverUrl}/.well-known/jmap`, {
+    method: 'GET',
+    headers: { 'Authorization': authHeader },
+  });
+  if (!res.ok) return null;
+  const session = await res.json() as { primaryAccounts?: Record<string, string> };
+  return session.primaryAccounts?.['urn:stalwart:jmap']
+    ?? session.primaryAccounts?.['urn:ietf:params:jmap:mail']
+    ?? Object.values(session.primaryAccounts ?? {})[0]
+    ?? null;
+}
+
+function buildRedirectUris(origin: string, localeList: readonly string[]): Record<string, true> {
+  const out: Record<string, true> = {};
+  for (const loc of localeList) {
+    out[`${origin}/${loc}/auth/callback`] = true;
+  }
+  return out;
+}
+
+interface SetupRequestBody {
+  origin?: string;
+  issuerUrl?: string;
+  locales?: string[];
+  oauthOnly?: boolean;
+}
+
+function isValidOriginUrl(value: string): boolean {
+  return /^https?:\/\/[^/]+$/.test(value);
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(request);
+    if ('error' in auth) return auth.error;
+
+    const ip = getClientIP(request);
+    const creds = await getStalwartCredentials(request);
+    if (!creds) {
+      return NextResponse.json(
+        { error: 'No Stalwart session available. Sign in to your mail account in another tab and retry.' },
+        { status: 400 },
+      );
+    }
+
+    const body = await request.json() as SetupRequestBody;
+    const origin = (body.origin ?? '').trim().replace(/\/+$/, '');
+    if (!isValidOriginUrl(origin)) {
+      return NextResponse.json(
+        { error: 'Webmail origin must be a URL like "https://webmail.example.com" with no path.' },
+        { status: 400 },
+      );
+    }
+    const issuerUrl = (body.issuerUrl ?? origin).trim().replace(/\/+$/, '');
+    if (!isValidOriginUrl(issuerUrl)) {
+      return NextResponse.json(
+        { error: 'Stalwart issuer URL must be a URL like "https://mail.example.com" with no path.' },
+        { status: 400 },
+      );
+    }
+    const localeList = Array.isArray(body.locales) && body.locales.length > 0
+      ? body.locales.filter(l => typeof l === 'string' && /^[a-z]{2,5}(-[A-Za-z0-9]+)*$/.test(l))
+      : Array.from(ALL_LOCALES);
+    if (localeList.length === 0) {
+      return NextResponse.json({ error: 'No valid locales supplied.' }, { status: 400 });
+    }
+    const oauthOnly = body.oauthOnly === true;
+
+    const accountId = await getStalwartAccountId(creds.serverUrl, creds.authHeader);
+    if (!accountId) {
+      return NextResponse.json(
+        { error: 'Could not resolve Stalwart account from JMAP session.' },
+        { status: 502 },
+      );
+    }
+
+    const queryRes = await jmapCall(creds.serverUrl, creds.authHeader, {
+      using: ['urn:ietf:params:jmap:core', 'urn:stalwart:jmap'],
+      methodCalls: [[
+        'x:OAuthClient/query',
+        { accountId, filter: { clientId: CLIENT_ID } },
+        '0',
+      ]],
+    });
+
+    const queryEntry = queryRes.methodResponses?.[0];
+    if (!queryEntry || queryEntry[0] === 'error') {
+      return NextResponse.json({
+        error: 'Stalwart denied OAuthClient/query - your Stalwart account likely lacks admin permissions.',
+        detail: queryEntry?.[1],
+      }, { status: 403 });
+    }
+    const existingIds = (queryEntry[1].ids as string[] | undefined) ?? [];
+
+    const secret = randomBytes(32).toString('base64url');
+    const redirectUris = buildRedirectUris(origin, localeList);
+
+    let setArgs: Record<string, unknown>;
+    let action: 'created' | 'updated';
+    if (existingIds.length > 0) {
+      const targetId = existingIds[0];
+      action = 'updated';
+      setArgs = {
+        accountId,
+        update: {
+          [targetId]: {
+            secret,
+            redirectUris,
+            description: CLIENT_DESCRIPTION,
+          },
+        },
+      };
+    } else {
+      action = 'created';
+      setArgs = {
+        accountId,
+        create: {
+          new: {
+            clientId: CLIENT_ID,
+            description: CLIENT_DESCRIPTION,
+            secret,
+            redirectUris,
+            contacts: { [creds.username]: true },
+          },
+        },
+      };
+    }
+
+    const setRes = await jmapCall(creds.serverUrl, creds.authHeader, {
+      using: ['urn:ietf:params:jmap:core', 'urn:stalwart:jmap'],
+      methodCalls: [['x:OAuthClient/set', setArgs, '0']],
+    });
+
+    const setEntry = setRes.methodResponses?.[0];
+    if (!setEntry || setEntry[0] === 'error') {
+      return NextResponse.json({
+        error: 'Stalwart denied OAuthClient/set - admin permissions required.',
+        detail: setEntry?.[1],
+      }, { status: 403 });
+    }
+    const setBody = setEntry[1] as {
+      notCreated?: Record<string, unknown>;
+      notUpdated?: Record<string, unknown>;
+    };
+    if (setBody.notCreated && Object.keys(setBody.notCreated).length > 0) {
+      return NextResponse.json(
+        { error: 'Stalwart refused to create the OAuth client.', detail: setBody.notCreated },
+        { status: 502 },
+      );
+    }
+    if (setBody.notUpdated && Object.keys(setBody.notUpdated).length > 0) {
+      return NextResponse.json(
+        { error: 'Stalwart refused to update the OAuth client.', detail: setBody.notUpdated },
+        { status: 502 },
+      );
+    }
+
+    await configManager.ensureLoaded();
+    const updates: Record<string, unknown> = {
+      oauthEnabled: true,
+      oauthClientId: CLIENT_ID,
+      oauthClientSecret: secret,
+      oauthIssuerUrl: issuerUrl,
+    };
+    if (oauthOnly) updates.oauthOnly = true;
+    await configManager.setAdminConfig(updates);
+
+    await auditLog('admin.oauth_setup', {
+      action,
+      clientId: CLIENT_ID,
+      origin,
+      issuer: issuerUrl,
+      redirectUriCount: localeList.length,
+      oauthOnly,
+    }, ip);
+
+    logger.info('Admin OAuth setup', {
+      action,
+      clientId: CLIENT_ID,
+      origin,
+      issuer: issuerUrl,
+      locales: localeList.length,
+    });
+
+    return NextResponse.json({
+      ok: true,
+      action,
+      clientId: CLIENT_ID,
+      origin,
+      issuerUrl,
+      redirectUriCount: localeList.length,
+    });
+  } catch (error) {
+    logger.error('Admin OAuth setup error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json(
+      { error: error instanceof Error ? error.message : 'Internal server error' },
+      { status: 500 },
+    );
+  }
+}

app/api/admin/plugin-approvals/route.ts

@@ -0,0 +1,85 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import { listApprovals, decideApproval, revokeApproval } from '@/lib/admin/plugin-approvals';
+
+/**
+ * Admin-protected CRUD for the per-(pluginId, bundleHash) approval table.
+ *
+ *   GET    /api/admin/plugin-approvals               → list all entries
+ *   POST   /api/admin/plugin-approvals               → { pluginId, bundleHash, decision: 'approved'|'denied' }
+ *   DELETE /api/admin/plugin-approvals?pluginId=…&bundleHash=…   → revoke
+ */
+
+function isValidId(s: unknown): s is string {
+  return typeof s === 'string' && /^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(s) && s.length <= 64;
+}
+function isValidHash(s: unknown): s is string {
+  return typeof s === 'string' && /^[a-f0-9]{16,128}$/i.test(s);
+}
+
+export async function GET(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+    const entries = await listApprovals();
+    return NextResponse.json({ entries }, { headers: { 'Cache-Control': 'no-store' } });
+  } catch (err) {
+    logger.error('plugin-approvals GET', { error: err instanceof Error ? err.message : String(err) });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+    // AdminSessionPayload carries only role/iat/exp; we use a stable label
+    // for the audit trail rather than a per-user identity.
+    const adminUser = 'admin';
+    void result;
+    const ip = getClientIP(request);
+
+    let body: unknown;
+    try { body = await request.json(); } catch { body = null; }
+    const b = (body ?? {}) as { pluginId?: unknown; bundleHash?: unknown; decision?: unknown };
+    if (!isValidId(b.pluginId) || !isValidHash(b.bundleHash)) {
+      return NextResponse.json({ error: 'invalid pluginId or bundleHash' }, { status: 400 });
+    }
+    if (b.decision !== 'approved' && b.decision !== 'denied') {
+      return NextResponse.json({ error: 'decision must be "approved" or "denied"' }, { status: 400 });
+    }
+
+    const entry = await decideApproval(b.pluginId, b.bundleHash, b.decision, adminUser);
+    await auditLog('plugin.approval', { pluginId: entry.pluginId, bundleHash: entry.bundleHash, decision: entry.status }, ip);
+    return NextResponse.json({ entry });
+  } catch (err) {
+    logger.error('plugin-approvals POST', { error: err instanceof Error ? err.message : String(err) });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+export async function DELETE(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+    // AdminSessionPayload carries only role/iat/exp; we use a stable label
+    // for the audit trail rather than a per-user identity.
+    const adminUser = 'admin';
+    void result;
+    const ip = getClientIP(request);
+
+    const pluginId = request.nextUrl.searchParams.get('pluginId');
+    const bundleHash = request.nextUrl.searchParams.get('bundleHash');
+    if (!isValidId(pluginId) || !isValidHash(bundleHash)) {
+      return NextResponse.json({ error: 'invalid pluginId or bundleHash' }, { status: 400 });
+    }
+    await revokeApproval(pluginId, bundleHash);
+    await auditLog('plugin.approval.revoke', { pluginId, bundleHash, by: adminUser }, ip);
+    return NextResponse.json({ ok: true });
+  } catch (err) {
+    logger.error('plugin-approvals DELETE', { error: err instanceof Error ? err.message : String(err) });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/plugins/[id]/bundle/route.ts

@@ -0,0 +1,80 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { getPluginBundle, getPlugin } from '@/lib/admin/plugin-registry';
+import { getDevPlugin, readDevBundle } from '@/lib/admin/plugin-dev';
+import { signBytes } from '@/lib/admin/plugin-signing';
+
+async function safeSign(code: string): Promise<string | null> {
+  try { return await signBytes(code); } catch { return null; }
+}
+
+/**
+ * GET /api/admin/plugins/[id]/bundle - Serve plugin JS bundle
+ *
+ * Public endpoint so the client-side plugin loader can fetch bundles.
+ * Only serves plugins that exist in the registry and are enabled.
+ */
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  try {
+    const { id } = await params;
+
+    // Validate ID format to prevent path traversal
+    if (!/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(id)) {
+      return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
+    }
+
+    // Dev plugins are read (and optionally bundled) straight from disk and
+    // served with no caching so every refresh picks up the latest source.
+    const devEntry = await getDevPlugin(id);
+    if (devEntry) {
+      const code = await readDevBundle(devEntry);
+      const signature = await safeSign(code);
+      const headers: Record<string, string> = {
+        'Content-Type': 'application/javascript; charset=utf-8',
+        'Cache-Control': 'no-store',
+        'ETag': `"${devEntry.plugin.bundleHash}"`,
+        'Content-Length': String(Buffer.byteLength(code, 'utf-8')),
+      };
+      if (signature) headers['X-Bundle-Signature'] = signature;
+      return new NextResponse(code, { headers });
+    }
+
+    const plugin = await getPlugin(id);
+    if (!plugin) {
+      return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
+    }
+
+    if (!plugin.enabled) {
+      return NextResponse.json({ error: 'Plugin is disabled' }, { status: 403 });
+    }
+
+    const code = await getPluginBundle(id);
+    if (!code) {
+      return NextResponse.json({ error: 'Bundle not found' }, { status: 404 });
+    }
+
+    // Use the registry's bundleHash as the ETag so the browser can revalidate
+    // cheaply. Cache-Control: no-cache forces revalidation on every request,
+    // but a matching If-None-Match returns 304 with no body.
+    const etag = plugin.bundleHash ? `"${plugin.bundleHash}"` : undefined;
+    const headers: Record<string, string> = {
+      'Content-Type': 'application/javascript; charset=utf-8',
+      'Cache-Control': 'private, no-cache, must-revalidate',
+    };
+    if (etag) headers['ETag'] = etag;
+
+    const signature = await safeSign(code);
+    if (signature) headers['X-Bundle-Signature'] = signature;
+
+    if (etag && request.headers.get('if-none-match') === etag) {
+      return new NextResponse(null, { status: 304, headers });
+    }
+
+    headers['Content-Length'] = String(Buffer.byteLength(code, 'utf-8'));
+    return new NextResponse(code, { headers });
+  } catch {
+    return NextResponse.json({ error: 'Not found' }, { status: 404 });
+  }
+}

app/api/admin/plugins/[id]/config/route.ts

@@ -0,0 +1,167 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { getPlugin } from '@/lib/admin/plugin-registry';
+import { getDevPlugin } from '@/lib/admin/plugin-dev';
+import { getPluginConfig, setPluginConfig, deletePluginConfigKey } from '@/lib/admin/plugin-config';
+import { requireAdminAuth } from '@/lib/admin/session';
+import { getStalwartCredentials } from '@/lib/stalwart/credentials';
+
+/** Resolve a plugin from the persisted registry first, then PLUGIN_DEV_DIR. */
+async function resolvePlugin(id: string) {
+  const registered = await getPlugin(id);
+  if (registered) return registered;
+  const dev = await getDevPlugin(id);
+  return dev?.plugin ?? null;
+}
+
+/**
+ * GET /api/admin/plugins/[id]/config - Read plugin config
+ *
+ * - Admin sessions receive every field, including those declared
+ *   `type: 'secret'` in the plugin's configSchema.
+ * - Authenticated mailbox users (the plugin running in their browser)
+ *   receive only non-secret fields.
+ * - Anonymous callers are rejected so unauthenticated visitors cannot
+ *   enumerate plugin secrets.
+ */
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  try {
+    const { id } = await params;
+
+    if (!/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(id)) {
+      return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
+    }
+
+    const adminAuth = await requireAdminAuth(request);
+    const isAdmin = !('error' in adminAuth);
+
+    if (!isAdmin) {
+      const creds = await getStalwartCredentials(request);
+      if (!creds) {
+        return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+      }
+    }
+
+    const plugin = await resolvePlugin(id);
+    if (!plugin) {
+      return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
+    }
+
+    const config = await getPluginConfig(id);
+
+    let response: Record<string, unknown>;
+    if (isAdmin) {
+      response = config;
+    } else {
+      response = {};
+      const schema = plugin.configSchema;
+      if (schema) {
+        for (const [key, value] of Object.entries(config)) {
+          const field = schema[key];
+          if (!field || field.type === 'secret') continue;
+          response[key] = value;
+        }
+      }
+    }
+
+    return NextResponse.json(response, {
+      headers: { 'Cache-Control': 'no-store' },
+    });
+  } catch {
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * PUT /api/admin/plugins/[id]/config - Set a config key
+ *
+ * Body: { key: string, value: unknown }
+ * Requires admin authentication (checked via admin session).
+ */
+export async function PUT(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const { id } = await params;
+
+    if (!/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(id)) {
+      return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
+    }
+
+    const plugin = await resolvePlugin(id);
+    if (!plugin) {
+      return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
+    }
+
+    let body: { key?: string; value?: unknown };
+    try {
+      body = await request.json();
+    } catch {
+      return NextResponse.json({ error: 'Invalid request body' }, { status: 400 });
+    }
+
+    if (!body.key || typeof body.key !== 'string') {
+      return NextResponse.json({ error: 'key is required and must be a string' }, { status: 400 });
+    }
+
+    // Validate key format (alphanumeric, hyphens, underscores, dots)
+    if (!/^[a-zA-Z0-9._-]+$/.test(body.key)) {
+      return NextResponse.json({ error: 'Invalid key format' }, { status: 400 });
+    }
+
+    if (plugin.configSchema && !plugin.configSchema[body.key]) {
+      return NextResponse.json(
+        { error: 'Key is not declared in the plugin configSchema' },
+        { status: 400 },
+      );
+    }
+
+    await setPluginConfig(id, body.key, body.value);
+    return NextResponse.json({ ok: true });
+  } catch {
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * DELETE /api/admin/plugins/[id]/config - Delete a config key
+ *
+ * Body: { key: string }
+ */
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const { id } = await params;
+
+    if (!/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(id)) {
+      return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
+    }
+
+    let body: { key?: string };
+    try {
+      body = await request.json();
+    } catch {
+      return NextResponse.json({ error: 'Invalid request body' }, { status: 400 });
+    }
+
+    if (!body.key || typeof body.key !== 'string') {
+      return NextResponse.json({ error: 'key is required' }, { status: 400 });
+    }
+
+    await deletePluginConfigKey(id, body.key);
+    return NextResponse.json({ ok: true });
+  } catch {
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/plugins/route.ts

@@ -0,0 +1,298 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import {
+  getPluginRegistry,
+  savePlugin,
+  deletePlugin as removePlugin,
+  type ServerPlugin,
+} from '@/lib/admin/plugin-registry';
+import { listDevPlugins } from '@/lib/admin/plugin-dev';
+import {
+  sanitizeFrameOrigins,
+  sanitizeHttpOrigins,
+  sanitizeApiPostPaths,
+  invalidateFrameOriginsCache,
+} from '@/lib/admin/csp-frame-origins';
+
+// Server-side extraction using the same validation logic
+// ZIP parsing needs to happen on the server for admin-uploaded plugins
+import JSZip from 'jszip';
+import { MAX_PLUGIN_SIZE, ALL_PERMISSIONS, ALLOWED_PLUGIN_FILES } from '@/lib/plugin-types';
+
+const SUSPICIOUS_JS_PATTERNS = [
+  { pattern: /\beval\s*\(/g, label: 'eval()' },
+  { pattern: /\bnew\s+Function\s*\(/g, label: 'new Function()' },
+  { pattern: /document\.cookie/g, label: 'document.cookie' },
+  { pattern: /document\.write/g, label: 'document.write' },
+  { pattern: /innerHTML\s*=/g, label: 'innerHTML assignment' },
+];
+
+/**
+ * GET /api/admin/plugins - List all admin-managed plugins
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const [registry, devEntries] = await Promise.all([
+      getPluginRegistry(),
+      listDevPlugins(),
+    ]);
+
+    // Dev plugins win on id collision so admins see what users actually load.
+    const devIds = new Set(devEntries.map(e => e.plugin.id));
+    const merged = [
+      ...devEntries.map(e => ({ ...e.plugin, dev: true as const })),
+      ...registry.plugins
+        .filter(p => !devIds.has(p.id))
+        .map(p => ({ ...p, dev: false as const })),
+    ];
+    return NextResponse.json(merged, {
+      headers: { 'Cache-Control': 'no-store' },
+    });
+  } catch (error) {
+    logger.error('Plugin list error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * POST /api/admin/plugins - Upload and install a plugin ZIP
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const formData = await request.formData();
+    const file = formData.get('file') as File | null;
+
+    if (!file) {
+      return NextResponse.json({ error: 'Missing file' }, { status: 400 });
+    }
+
+    if (file.size > MAX_PLUGIN_SIZE) {
+      return NextResponse.json({ error: 'Plugin ZIP exceeds 5 MB size limit' }, { status: 400 });
+    }
+
+    // Extract and validate ZIP
+    let zip: JSZip;
+    try {
+      const buffer = await file.arrayBuffer();
+      zip = await JSZip.loadAsync(buffer);
+    } catch {
+      return NextResponse.json({ error: 'Invalid ZIP file' }, { status: 400 });
+    }
+
+    // Find root
+    const entries = Object.keys(zip.files);
+    const topDirs = new Set(entries.map(e => e.split('/')[0]));
+    let root = '';
+    if (topDirs.size === 1) {
+      const dir = [...topDirs][0];
+      if (zip.files[dir + '/'] || entries.some(e => e.startsWith(dir + '/'))) {
+        root = dir + '/';
+      }
+    }
+
+    // Read manifest
+    const manifestFile = zip.file(root + 'manifest.json');
+    if (!manifestFile) {
+      return NextResponse.json({ error: 'Missing manifest.json' }, { status: 400 });
+    }
+
+    let manifest: Record<string, unknown>;
+    try {
+      manifest = JSON.parse(await manifestFile.async('string'));
+    } catch {
+      return NextResponse.json({ error: 'Invalid manifest.json' }, { status: 400 });
+    }
+
+    // Validate manifest
+    const errors: string[] = [];
+    if (!manifest.id || typeof manifest.id !== 'string') errors.push('Missing or invalid "id"');
+    if (!manifest.name || typeof manifest.name !== 'string') errors.push('Missing or invalid "name"');
+    if (!manifest.version || typeof manifest.version !== 'string') errors.push('Missing or invalid "version"');
+    if (!manifest.author || typeof manifest.author !== 'string') errors.push('Missing or invalid "author"');
+    if (!manifest.entrypoint || typeof manifest.entrypoint !== 'string') errors.push('Missing or invalid "entrypoint"');
+
+    const validTypes = ['ui-extension', 'sidebar-app', 'hook'];
+    if (!validTypes.includes(manifest.type as string)) {
+      errors.push(`Invalid type. Must be one of: ${validTypes.join(', ')}`);
+    }
+
+    if (manifest.id && typeof manifest.id === 'string' && !/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(manifest.id)) {
+      errors.push('ID must be lowercase alphanumeric with hyphens, min 2 chars');
+    }
+
+    if (manifest.permissions && Array.isArray(manifest.permissions)) {
+      const validPerms = new Set(ALL_PERMISSIONS as readonly string[]);
+      const unknown = (manifest.permissions as string[]).filter(p => !validPerms.has(p));
+      if (unknown.length > 0) errors.push(`Unknown permissions: ${unknown.join(', ')}`);
+    }
+
+    if (errors.length > 0) {
+      return NextResponse.json({ error: errors.join('; ') }, { status: 400 });
+    }
+
+    // Check file extensions
+    for (const [filePath, entry] of Object.entries(zip.files)) {
+      if (entry.dir) continue;
+      const ext = filePath.lastIndexOf('.') >= 0 ? filePath.slice(filePath.lastIndexOf('.')).toLowerCase() : '';
+      if (ext && !ALLOWED_PLUGIN_FILES.has(ext)) {
+        errors.push(`Disallowed file type: ${filePath}`);
+      }
+    }
+    if (errors.length > 0) {
+      return NextResponse.json({ error: errors.join('; ') }, { status: 400 });
+    }
+
+    // Read entrypoint code
+    const entryFile = zip.file(root + (manifest.entrypoint as string));
+    if (!entryFile) {
+      return NextResponse.json({ error: `Missing entrypoint: ${manifest.entrypoint}` }, { status: 400 });
+    }
+    const code = await entryFile.async('string');
+
+    // Security: block plugins containing dangerous JS patterns
+    const warnings: string[] = [];
+    for (const { pattern, label } of SUSPICIOUS_JS_PATTERNS) {
+      if (pattern.test(code)) warnings.push(`Contains ${label}`);
+      pattern.lastIndex = 0;
+    }
+    if (warnings.length > 0) {
+      return NextResponse.json(
+        { error: `Plugin rejected: ${warnings.join(', ')}. These patterns are not allowed for security reasons.` },
+        { status: 400 },
+      );
+    }
+
+    const declaredFrameOrigins = sanitizeFrameOrigins(manifest.frameOrigins);
+    const declaredHttpOrigins = sanitizeHttpOrigins(manifest.httpOrigins);
+    const declaredApiPostPaths = sanitizeApiPostPaths(manifest.apiPostPaths);
+
+    const now = new Date().toISOString();
+    const plugin: ServerPlugin = {
+      id: manifest.id as string,
+      name: manifest.name as string,
+      version: manifest.version as string,
+      author: manifest.author as string,
+      description: (manifest.description as string) || '',
+      type: manifest.type as string,
+      permissions: (manifest.permissions as string[]) || [],
+      entrypoint: manifest.entrypoint as string,
+      enabled: true,
+      ...(manifest.configSchema && typeof manifest.configSchema === 'object'
+        ? { configSchema: manifest.configSchema as ServerPlugin['configSchema'] }
+        : {}),
+      ...(manifest.settingsSchema && typeof manifest.settingsSchema === 'object'
+        ? { settingsSchema: manifest.settingsSchema as ServerPlugin['settingsSchema'] }
+        : {}),
+      ...(declaredFrameOrigins.length > 0
+        ? { frameOrigins: declaredFrameOrigins }
+        : {}),
+      ...(declaredHttpOrigins.length > 0
+        ? { httpOrigins: declaredHttpOrigins }
+        : {}),
+      ...(declaredApiPostPaths.length > 0
+        ? { apiPostPaths: declaredApiPostPaths }
+        : {}),
+      installedAt: now,
+      updatedAt: now,
+    };
+
+    await savePlugin(plugin, code);
+    invalidateFrameOriginsCache();
+    await auditLog('plugin.install', { id: plugin.id, name: plugin.name, version: plugin.version, frameOrigins: declaredFrameOrigins, httpOrigins: declaredHttpOrigins, apiPostPaths: declaredApiPostPaths }, ip);
+
+    return NextResponse.json({ plugin });
+  } catch (error) {
+    logger.error('Plugin install error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * PATCH /api/admin/plugins - Update plugin metadata (enable/disable)
+ * Body: { id: string, enabled: boolean }
+ */
+export async function PATCH(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const { id, enabled, forceEnabled } = await request.json();
+
+    if (!id || typeof id !== 'string') {
+      return NextResponse.json({ error: 'Missing plugin id' }, { status: 400 });
+    }
+    if (typeof enabled !== 'boolean' && typeof forceEnabled !== 'boolean') {
+      return NextResponse.json({ error: 'enabled or forceEnabled must be a boolean' }, { status: 400 });
+    }
+
+    const updates: { enabled?: boolean; forceEnabled?: boolean } = {};
+    if (typeof enabled === 'boolean') updates.enabled = enabled;
+    if (typeof forceEnabled === 'boolean') updates.forceEnabled = forceEnabled;
+
+    const { updatePluginMeta } = await import('@/lib/admin/plugin-registry');
+    let updated = await updatePluginMeta(id, updates);
+    if (!updated) {
+      // Dev plugins (PLUGIN_DEV_DIR) aren't in the persisted registry, but
+      // forceEnabled is canonical-stored in policy.forceEnabledPlugins on the
+      // client. Skip the registry write and return the live dev plugin so the
+      // policy save path can proceed.
+      const devEntries = await listDevPlugins();
+      const devEntry = devEntries.find(e => e.plugin.id === id);
+      if (!devEntry) {
+        return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
+      }
+      updated = { ...devEntry.plugin, ...updates };
+    }
+
+    // Enable/disable changes the set of plugins contributing frame origins.
+    if (typeof updates.enabled === 'boolean' || typeof updates.forceEnabled === 'boolean') {
+      invalidateFrameOriginsCache();
+    }
+
+    await auditLog('plugin.update', { id, ...updates }, ip);
+    return NextResponse.json({ plugin: updated });
+  } catch (error) {
+    logger.error('Plugin update error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * DELETE /api/admin/plugins - Remove a plugin
+ * Body: { id: string }
+ */
+export async function DELETE(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const { id } = await request.json();
+
+    if (!id || typeof id !== 'string') {
+      return NextResponse.json({ error: 'Missing plugin id' }, { status: 400 });
+    }
+
+    const removed = await removePlugin(id);
+    if (!removed) {
+      return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
+    }
+
+    invalidateFrameOriginsCache();
+    await auditLog('plugin.delete', { id }, ip);
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    logger.error('Plugin delete error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/policy/route.ts

@@ -0,0 +1,58 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { configManager } from '@/lib/admin/config-manager';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import type { SettingsPolicy } from '@/lib/admin/types';
+
+/**
+ * GET /api/admin/policy - Get settings policy (NOT admin-protected - users read this)
+ */
+export async function GET() {
+  try {
+    await configManager.ensureLoaded();
+    const policy = configManager.getPolicy();
+    return NextResponse.json(policy, {
+      headers: { 'Cache-Control': 'no-store' },
+    });
+  } catch (error) {
+    logger.error('Policy read error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * PUT /api/admin/policy - Update settings policy (admin-protected)
+ */
+export async function PUT(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const policy = await request.json() as SettingsPolicy;
+
+    if (!policy || typeof policy !== 'object') {
+      return NextResponse.json({ error: 'Invalid policy object' }, { status: 400 });
+    }
+
+    // Basic validation
+    if (policy.restrictions && typeof policy.restrictions !== 'object') {
+      return NextResponse.json({ error: 'restrictions must be an object' }, { status: 400 });
+    }
+    if (policy.features && typeof policy.features !== 'object') {
+      return NextResponse.json({ error: 'features must be an object' }, { status: 400 });
+    }
+    if (policy.themePolicy && typeof policy.themePolicy !== 'object') {
+      return NextResponse.json({ error: 'themePolicy must be an object' }, { status: 400 });
+    }
+
+    await configManager.setPolicy(policy);
+    await auditLog('policy.update', { restrictionCount: Object.keys(policy.restrictions || {}).length }, ip);
+
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    logger.error('Policy update error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/telemetry/route.ts

@@ -0,0 +1,135 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import {
+  effectiveConsent,
+  loadState,
+  saveState,
+  buildPayload,
+  sendOnce,
+  reschedule,
+  DEFAULT_ENDPOINT,
+  getLoginCounts,
+  resolveEndpointAllowed,
+} from '@/lib/telemetry';
+
+/**
+ * GET /api/admin/telemetry
+ * Returns current consent + endpoint + next/last send + a live preview
+ * of exactly what the next heartbeat would contain.
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(request);
+    if ('error' in auth) return auth.error;
+
+    const { consent, source, state } = await effectiveConsent();
+    const [payload, accountCounts] = await Promise.all([
+      buildPayload(),
+      getLoginCounts(),
+    ]);
+
+    return NextResponse.json(
+      {
+        consent,
+        consentSource: source,
+        endpoint: state.endpoint || DEFAULT_ENDPOINT,
+        consentedAt: state.consentedAt,
+        lastSentAt: state.lastSentAt,
+        nextScheduledAt: state.nextScheduledAt,
+        defaultEndpoint: DEFAULT_ENDPOINT,
+        payloadPreview: payload,
+        accountCounts,
+      },
+      { headers: { 'Cache-Control': 'no-store' } },
+    );
+  } catch (err) {
+    logger.error('telemetry GET error', {
+      error: err instanceof Error ? err.message : 'unknown',
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * POST /api/admin/telemetry
+ * Body: { action: 'set-consent' | 'set-endpoint' | 'send-now', ... }
+ *   set-consent  : { action, consent: 'on' | 'off' }
+ *   set-endpoint : { action, endpoint: string }
+ *   send-now     : { action }
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(request);
+    if ('error' in auth) return auth.error;
+    const ip = getClientIP(request);
+
+    const body = (await request.json().catch(() => null)) as
+      | { action?: string; consent?: string; endpoint?: string }
+      | null;
+    if (!body || typeof body.action !== 'string') {
+      return NextResponse.json({ error: 'action required' }, { status: 400 });
+    }
+
+    const { source } = await effectiveConsent();
+
+    if (body.action === 'set-consent') {
+      if (source === 'env') {
+        return NextResponse.json(
+          { error: 'consent is overridden by BULWARK_TELEMETRY env var' },
+          { status: 409 },
+        );
+      }
+      if (body.consent !== 'on' && body.consent !== 'off') {
+        return NextResponse.json({ error: 'consent must be "on" or "off"' }, { status: 400 });
+      }
+      const state = await loadState();
+      const before = state.consent;
+      state.consent = body.consent;
+      if (body.consent === 'on' && !state.consentedAt) {
+        state.consentedAt = new Date().toISOString();
+      }
+      await saveState(state);
+      await reschedule();
+      await auditLog('telemetry.set-consent', { from: before, to: body.consent }, ip);
+      return NextResponse.json({ ok: true });
+    }
+
+    if (body.action === 'set-endpoint') {
+      if (typeof body.endpoint !== 'string') {
+        return NextResponse.json({ error: 'endpoint required' }, { status: 400 });
+      }
+      const trimmed = body.endpoint.trim();
+      if (trimmed) {
+        const check = await resolveEndpointAllowed(trimmed);
+        if (!check.ok) {
+          return NextResponse.json({ error: check.reason }, { status: 400 });
+        }
+      }
+      const state = await loadState();
+      const before = state.endpoint;
+      state.endpoint = trimmed || DEFAULT_ENDPOINT;
+      await saveState(state);
+      await auditLog('telemetry.set-endpoint', { from: before, to: state.endpoint }, ip);
+      return NextResponse.json({ ok: true, endpoint: state.endpoint });
+    }
+
+    if (body.action === 'send-now') {
+      const result = await sendOnce({ reason: 'admin-manual' });
+      await auditLog(
+        'telemetry.send-now',
+        { ok: result.ok, status: result.status ?? null, error: result.error ?? null },
+        ip,
+      );
+      return NextResponse.json(result, { status: result.ok ? 200 : 502 });
+    }
+
+    return NextResponse.json({ error: 'unknown action' }, { status: 400 });
+  } catch (err) {
+    logger.error('telemetry POST error', {
+      error: err instanceof Error ? err.message : 'unknown',
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/themes/[id]/css/route.ts

@@ -0,0 +1,46 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { getThemeCSS, getThemeRegistry } from '@/lib/admin/plugin-registry';
+import { logger } from '@/lib/logger';
+
+/**
+ * GET /api/admin/themes/[id]/css - Serve theme CSS to clients
+ */
+export async function GET(
+  _request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const { id } = await params;
+
+    // Validate ID format
+    if (!/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(id)) {
+      return NextResponse.json({ error: 'Invalid theme ID' }, { status: 400 });
+    }
+
+    // Verify theme exists and is enabled
+    const registry = await getThemeRegistry();
+    const theme = registry.themes.find(t => t.id === id);
+    if (!theme) {
+      return NextResponse.json({ error: 'Theme not found' }, { status: 404 });
+    }
+    if (!theme.enabled) {
+      return NextResponse.json({ error: 'Theme is disabled' }, { status: 403 });
+    }
+
+    const css = await getThemeCSS(id);
+    if (!css) {
+      return NextResponse.json({ error: 'Theme CSS not found' }, { status: 404 });
+    }
+
+    return new NextResponse(css, {
+      headers: {
+        'Content-Type': 'text/css; charset=utf-8',
+        'Cache-Control': 'public, max-age=3600',
+        'X-Content-Type-Options': 'nosniff',
+      },
+    });
+  } catch (error) {
+    logger.error('Theme CSS serve error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/themes/route.ts

@@ -0,0 +1,217 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import {
+  getThemeRegistry,
+  saveTheme,
+  deleteTheme as removeTheme,
+  type ServerTheme,
+} from '@/lib/admin/plugin-registry';
+
+import JSZip from 'jszip';
+import { MAX_THEME_SIZE } from '@/lib/plugin-types';
+import { sanitizeThemeCSS, validateThemeCSSSafety } from '@/lib/theme-loader';
+
+/**
+ * GET /api/admin/themes - List all admin-managed themes
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const registry = await getThemeRegistry();
+    return NextResponse.json(registry.themes, {
+      headers: { 'Cache-Control': 'no-store' },
+    });
+  } catch (error) {
+    logger.error('Theme list error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * POST /api/admin/themes - Upload and install a theme ZIP
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const formData = await request.formData();
+    const file = formData.get('file') as File | null;
+
+    if (!file) {
+      return NextResponse.json({ error: 'Missing file' }, { status: 400 });
+    }
+
+    if (file.size > MAX_THEME_SIZE) {
+      return NextResponse.json({ error: 'Theme ZIP exceeds 1 MB size limit' }, { status: 400 });
+    }
+
+    // Extract and validate ZIP
+    let zip: JSZip;
+    try {
+      const buffer = await file.arrayBuffer();
+      zip = await JSZip.loadAsync(buffer);
+    } catch {
+      return NextResponse.json({ error: 'Invalid ZIP file' }, { status: 400 });
+    }
+
+    // Find root
+    const entries = Object.keys(zip.files);
+    const topDirs = new Set(entries.map(e => e.split('/')[0]));
+    let root = '';
+    if (topDirs.size === 1) {
+      const dir = [...topDirs][0];
+      if (zip.files[dir + '/'] || entries.some(e => e.startsWith(dir + '/'))) {
+        root = dir + '/';
+      }
+    }
+
+    // Read manifest
+    const manifestFile = zip.file(root + 'manifest.json');
+    if (!manifestFile) {
+      return NextResponse.json({ error: 'Missing manifest.json' }, { status: 400 });
+    }
+
+    let manifest: Record<string, unknown>;
+    try {
+      manifest = JSON.parse(await manifestFile.async('string'));
+    } catch {
+      return NextResponse.json({ error: 'Invalid manifest.json' }, { status: 400 });
+    }
+
+    // Validate manifest
+    const errors: string[] = [];
+    if (!manifest.id || typeof manifest.id !== 'string') errors.push('Missing or invalid "id"');
+    if (!manifest.name || typeof manifest.name !== 'string') errors.push('Missing or invalid "name"');
+    if (!manifest.version || typeof manifest.version !== 'string') errors.push('Missing or invalid "version"');
+    if (!manifest.author || typeof manifest.author !== 'string') errors.push('Missing or invalid "author"');
+
+    if (manifest.type !== 'theme') {
+      errors.push(`Expected type "theme", got "${manifest.type}"`);
+    }
+
+    if (manifest.id && typeof manifest.id === 'string' && !/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(manifest.id)) {
+      errors.push('ID must be lowercase alphanumeric with hyphens, min 2 chars');
+    }
+
+    if (!manifest.variants || !Array.isArray(manifest.variants) || manifest.variants.length === 0) {
+      errors.push('Missing or empty "variants" array');
+    } else {
+      const valid = manifest.variants.every((v: unknown) => v === 'light' || v === 'dark');
+      if (!valid) errors.push('Variants must be "light" or "dark"');
+    }
+
+    if (errors.length > 0) {
+      return NextResponse.json({ error: errors.join('; ') }, { status: 400 });
+    }
+
+    // Read theme.css
+    const cssFile = zip.file(root + 'theme.css');
+    if (!cssFile) {
+      return NextResponse.json({ error: 'Missing theme.css' }, { status: 400 });
+    }
+
+    let css = await cssFile.async('string');
+
+    // Validate and sanitize CSS
+    const warnings: string[] = [];
+    const safety = validateThemeCSSSafety(css);
+    if (!safety.valid) {
+      const sanitized = sanitizeThemeCSS(css);
+      css = sanitized.css;
+      warnings.push(...sanitized.warnings);
+    }
+
+    const now = new Date().toISOString();
+    const theme: ServerTheme = {
+      id: manifest.id as string,
+      name: manifest.name as string,
+      version: manifest.version as string,
+      author: manifest.author as string,
+      description: (manifest.description as string) || '',
+      variants: manifest.variants as string[],
+      enabled: true,
+      installedAt: now,
+      updatedAt: now,
+    };
+
+    await saveTheme(theme, css);
+    await auditLog('theme.install', { id: theme.id, name: theme.name, version: theme.version, warnings }, ip);
+
+    return NextResponse.json({ theme, warnings });
+  } catch (error) {
+    logger.error('Theme install error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * PATCH /api/admin/themes - Update theme metadata (enable/disable)
+ * Body: { id: string, enabled: boolean }
+ */
+export async function PATCH(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const { id, enabled, forceEnabled } = await request.json();
+
+    if (!id || typeof id !== 'string') {
+      return NextResponse.json({ error: 'Missing theme id' }, { status: 400 });
+    }
+    if (typeof enabled !== 'boolean' && typeof forceEnabled !== 'boolean') {
+      return NextResponse.json({ error: 'enabled or forceEnabled must be a boolean' }, { status: 400 });
+    }
+
+    const updates: { enabled?: boolean; forceEnabled?: boolean } = {};
+    if (typeof enabled === 'boolean') updates.enabled = enabled;
+    if (typeof forceEnabled === 'boolean') updates.forceEnabled = forceEnabled;
+
+    const { updateThemeMeta } = await import('@/lib/admin/plugin-registry');
+    const updated = await updateThemeMeta(id, updates);
+    if (!updated) {
+      return NextResponse.json({ error: 'Theme not found' }, { status: 404 });
+    }
+
+    await auditLog('theme.update', { id, ...updates }, ip);
+    return NextResponse.json({ theme: updated });
+  } catch (error) {
+    logger.error('Theme update error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * DELETE /api/admin/themes - Remove a theme
+ * Body: { id: string }
+ */
+export async function DELETE(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const ip = getClientIP(request);
+    const { id } = await request.json();
+
+    if (!id || typeof id !== 'string') {
+      return NextResponse.json({ error: 'Missing theme id' }, { status: 400 });
+    }
+
+    const removed = await removeTheme(id);
+    if (!removed) {
+      return NextResponse.json({ error: 'Theme not found' }, { status: 404 });
+    }
+
+    await auditLog('theme.delete', { id }, ip);
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    logger.error('Theme delete error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/version/route.ts

@@ -0,0 +1,66 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth } from '@/lib/admin/session';
+import { logger } from '@/lib/logger';
+import {
+  loadState,
+  checkOnce,
+  effectiveEndpoint,
+  disabledByEnv,
+  DEFAULT_VERSION_ENDPOINT,
+} from '@/lib/version-check';
+
+/**
+ * GET /api/admin/version
+ * Returns the cached update status, last check times, and effective config.
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(request);
+    if ('error' in auth) return auth.error;
+
+    const state = await loadState();
+    return NextResponse.json(
+      {
+        current: process.env.NEXT_PUBLIC_APP_VERSION || '0.0.0',
+        build: process.env.NEXT_PUBLIC_GIT_COMMIT || 'unknown',
+        endpoint: effectiveEndpoint(state),
+        defaultEndpoint: DEFAULT_VERSION_ENDPOINT,
+        disabledByEnv: disabledByEnv(),
+        lastCheckedAt: state.lastCheckedAt,
+        lastSuccessAt: state.lastSuccessAt,
+        nextScheduledAt: state.nextScheduledAt,
+        status: state.status,
+      },
+      { headers: { 'Cache-Control': 'no-store' } },
+    );
+  } catch (err) {
+    logger.error('version admin GET error', {
+      error: err instanceof Error ? err.message : 'unknown',
+    });
+    return NextResponse.json({ error: 'failed' }, { status: 500 });
+  }
+}
+
+/**
+ * POST /api/admin/version
+ * { action: 'check-now' } - force a fresh upstream fetch.
+ */
+export async function POST(req: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(req);
+    if ('error' in auth) return auth.error;
+
+    const body = (await req.json().catch(() => null)) as { action?: string } | null;
+    if (!body || body.action !== 'check-now') {
+      return NextResponse.json({ error: 'unknown action' }, { status: 400 });
+    }
+
+    const result = await checkOnce({ reason: 'admin-trigger' });
+    return NextResponse.json(result);
+  } catch (err) {
+    logger.error('version admin POST error', {
+      error: err instanceof Error ? err.message : 'unknown',
+    });
+    return NextResponse.json({ error: 'failed' }, { status: 500 });
+  }
+}

app/api/auth/impersonate/route.ts

@@ -0,0 +1,141 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import { logger } from '@/lib/logger';
+import { encryptSession } from '@/lib/auth/crypto';
+import { sessionCookieName } from '@/lib/auth/session-cookie';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { normalizeJmapServerUrl } from '@/lib/auth/verify-jmap-auth';
+import { setStalwartAuthContextInStore } from '@/lib/stalwart/auth-context';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
+import {
+  ImpersonationJwtError,
+  impersonationReplayCache,
+  verifyImpersonationJwt,
+} from '@/lib/impersonation/jwt';
+import {
+  readImpersonationConfig,
+  resolveImpersonationServerUrl,
+} from '@/lib/impersonation/master-config';
+
+export const runtime = 'nodejs';
+
+const IMPERSONATION_SLOT = 0;
+
+/**
+ * Impersonation cookies deliberately omit Max-Age so the browser treats
+ * them as session cookies - the impersonated session ends when the user
+ * closes the browser, not 30 days later. Impersonation is a temporary
+ * support handoff; a normal password login is the only thing that should
+ * survive a browser restart.
+ */
+function impersonationCookieOptions() {
+  const { maxAge: _maxAge, ...rest } = getCookieOptions();
+  return rest;
+}
+
+/**
+ * GET /api/auth/impersonate?token=<jwt>
+ *
+ * Master-user impersonation via signed JWT. The token carries the target
+ * mailbox; Bulwark verifies the signature, resolves the configured Stalwart
+ * master credentials from env, then mints the same session cookies the
+ * password-login path produces. The browser is redirected to "/" and the
+ * SPA hydrates as if the user had just logged in with master@target%master.
+ *
+ * Returns 404 when the feature is not configured so an unconfigured
+ * deployment does not advertise the endpoint.
+ */
+export async function GET(request: NextRequest) {
+  const config = readImpersonationConfig();
+  if (!config) {
+    // Not configured - behave exactly like an unknown route.
+    return new NextResponse('Not found', { status: 404 });
+  }
+
+  const token = request.nextUrl.searchParams.get('token');
+  if (!token) {
+    return NextResponse.json({ error: 'Missing token' }, { status: 400 });
+  }
+
+  let claims;
+  try {
+    claims = verifyImpersonationJwt(token, config.jwtSecret, {
+      expectedIssuer: config.expectedIssuer,
+    });
+  } catch (err) {
+    if (err instanceof ImpersonationJwtError) {
+      logger.warn('Impersonation JWT rejected', { code: err.code });
+      return NextResponse.json({ error: err.message }, { status: err.status });
+    }
+    logger.error('Impersonation JWT error', {
+      error: err instanceof Error ? err.message : 'Unknown',
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+
+  if (!impersonationReplayCache.consume(claims.jti, claims.exp)) {
+    logger.warn('Impersonation JWT replay rejected', { jti: claims.jti });
+    return NextResponse.json({ error: 'Token already used' }, { status: 401 });
+  }
+
+  const serverUrl = await resolveImpersonationServerUrl();
+  if (!serverUrl) {
+    logger.error('Impersonation requested but jmapServerUrl is not configured');
+    return NextResponse.json({ error: 'JMAP server not configured' }, { status: 500 });
+  }
+
+  let normalizedServerUrl: string;
+  try {
+    normalizedServerUrl = normalizeJmapServerUrl(serverUrl);
+  } catch {
+    return NextResponse.json({ error: 'Invalid JMAP server URL' }, { status: 500 });
+  }
+
+  // Stalwart master-user impersonation: username = "<target>%<master>",
+  // password = <master_password>. Per Stalwart docs:
+  //   https://stalw.art/docs/auth/authorization/administrator/
+  const impersonatedUsername = `${claims.mailbox}%${config.masterUser}`;
+  const authHeader = `Basic ${Buffer.from(
+    `${impersonatedUsername}:${config.masterPassword}`,
+  ).toString('base64')}`;
+
+  const cookieStore = await cookies();
+  const sessionToken = encryptSession(
+    normalizedServerUrl,
+    impersonatedUsername,
+    config.masterPassword,
+  );
+  cookieStore.set(sessionCookieName(IMPERSONATION_SLOT), sessionToken, impersonationCookieOptions());
+  setStalwartAuthContextInStore(cookieStore, IMPERSONATION_SLOT, {
+    serverUrl: normalizedServerUrl,
+    username: impersonatedUsername,
+    authHeader,
+  });
+
+  // Structured audit log - operators rely on this for security review.
+  logger.info('Impersonation session granted', {
+    event: 'impersonation_granted',
+    jti: claims.jti,
+    mailbox: claims.mailbox,
+    tenant_id: claims.tenant_id,
+    actor_user_id: claims.actor_user_id,
+    iss: claims.iss,
+    ip:
+      request.headers.get('x-forwarded-for')?.split(',')[0]?.trim() ||
+      request.headers.get('x-real-ip') ||
+      null,
+    referer: request.headers.get('referer'),
+    user_agent: request.headers.get('user-agent'),
+  });
+
+  void recordLogin(impersonatedUsername, normalizedServerUrl);
+
+  // Use a relative Location header so the browser resolves it against the
+  // public request URL. NextResponse.redirect(new URL('/', request.url))
+  // would absolutise to the container's internal bind (http://0.0.0.0:3000)
+  // when running behind a reverse proxy that doesn't set X-Forwarded-Host.
+  return new NextResponse(null, {
+    status: 303,
+    headers: { Location: '/' },
+  });
+}

app/api/auth/session/route.ts

@@ -3,26 +3,43 @@ import { cookies } from 'next/headers';
 import { logger } from '@/lib/logger';
 import { encryptSession, decryptSession } from '@/lib/auth/crypto';
 import { SESSION_COOKIE_MAX_AGE, sessionCookieName } from '@/lib/auth/session-cookie';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import {
+  JmapAuthVerificationError,
+  normalizeJmapServerUrl,
+  validateProxyAuthHeader,
+  verifyJmapAuth,
+} from '@/lib/auth/verify-jmap-auth';
+import {
+  clearStalwartAuthContextInStore,
+  setStalwartAuthContextInStore,
+} from '@/lib/stalwart/auth-context';
+import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
+import { parseJmapServers, resolveTrustedJmapUrl } from '@/lib/admin/jmap-servers';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
 
-const COOKIE_OPTIONS = {
-  httpOnly: true,
-  secure: process.env.NODE_ENV === 'production',
-  sameSite: 'lax' as const,
-  path: '/',
-  maxAge: SESSION_COOKIE_MAX_AGE,
-};
+function sessionCookieOptions() {
+  return {
+    ...getCookieOptions(),
+    maxAge: SESSION_COOKIE_MAX_AGE,
+  };
+}
 
 function getSlot(request: NextRequest): number {
   const raw = request.nextUrl.searchParams.get('slot');
   if (raw === null) return 0;
   const slot = parseInt(raw, 10);
-  if (isNaN(slot) || slot < 0 || slot > 4) return 0;
+  if (isNaN(slot) || slot < 0 || slot >= MAX_ACCOUNT_SLOTS) return 0;
   return slot;
 }
 
 export async function POST(request: NextRequest) {
   try {
-    if (process.env.OAUTH_ENABLED === 'true' && process.env.OAUTH_ONLY === 'true') {
+    const oauthEnabled = configManager.get<boolean>('oauthEnabled', false);
+    const oauthOnly = configManager.get<boolean>('oauthOnly', false);
+    if (oauthEnabled && oauthOnly) {
       return NextResponse.json({ error: 'Basic authentication is disabled' }, { status: 403 });
     }
 
@@ -31,14 +48,63 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
     }
 
-    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : getSlot(request);
+    // Pin the upstream URL to a configured JMAP server so an unauthenticated
+    // caller cannot point this route at internal hosts. We accept the global
+    // `jmapServerUrl` and any entry from `jmapServers`. When neither matches,
+    // we fall back to the request URL only if `allowCustomJmapEndpoint` is on
+    // - and even then the URL must resolve to a public address.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
+    const serverList = parseJmapServers(configManager.get<unknown>('jmapServers', []));
+    const trustedUrl = resolveTrustedJmapUrl(serverUrl, configuredServerUrl, serverList);
+
+    let upstreamUrl: string;
+    let upstreamTrusted: boolean;
+    if (trustedUrl) {
+      upstreamUrl = trustedUrl;
+      upstreamTrusted = true;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        return NextResponse.json({ error: 'Server URL is not allowed' }, { status: 400 });
+      }
+      upstreamUrl = serverUrl;
+      upstreamTrusted = false;
+    } else {
+      return NextResponse.json({ error: 'JMAP server not configured' }, { status: 500 });
+    }
+
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot < MAX_ACCOUNT_SLOTS ? bodySlot : getSlot(request);
     const cookieName = sessionCookieName(slot);
-    const token = encryptSession(serverUrl, username, password);
+    const authHeader = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
+    // Trusted (admin-configured) URLs skip the upstream re-fetch: the cookie
+    // we write here is only ever consumed for requests on behalf of this same
+    // user, so bogus credentials would just yield 401s downstream rather than
+    // privilege escalation. Untrusted custom endpoints still verify upstream.
+    const normalizedServerUrl = upstreamTrusted
+      ? (validateProxyAuthHeader(authHeader), normalizeJmapServerUrl(upstreamUrl))
+      : await verifyJmapAuth(upstreamUrl, authHeader, { trusted: false });
+    const token = encryptSession(normalizedServerUrl, username, password);
     const cookieStore = await cookies();
-    cookieStore.set(cookieName, token, COOKIE_OPTIONS);
+    cookieStore.set(cookieName, token, sessionCookieOptions());
+    setStalwartAuthContextInStore(cookieStore, slot, {
+      serverUrl: normalizedServerUrl,
+      username,
+      authHeader,
+    });
+
+    void recordLogin(username, normalizedServerUrl);
 
     return NextResponse.json({ ok: true });
   } catch (error) {
+    if (error instanceof JmapAuthVerificationError) {
+      return NextResponse.json({ error: error.message }, { status: error.status });
+    }
+
     logger.error('Session store error', { error: error instanceof Error ? error.message : 'Unknown error' });
     return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
   }
@@ -58,9 +124,66 @@ export async function GET(request: NextRequest) {
     const credentials = decryptSession(token);
     if (!credentials) {
       cookieStore.delete(cookieName);
+      clearStalwartAuthContextInStore(cookieStore, slot);
       return NextResponse.json({ error: 'Invalid session' }, { status: 401 });
     }
 
+    setStalwartAuthContextInStore(cookieStore, slot, {
+      serverUrl: credentials.serverUrl,
+      username: credentials.username,
+      authHeader: `Basic ${Buffer.from(`${credentials.username}:${credentials.password}`).toString('base64')}`,
+    });
+
+    // Only return non-sensitive fields. Use PUT to retrieve full credentials.
+    const { serverUrl, username } = credentials;
+    return NextResponse.json(
+      { serverUrl, username },
+      { headers: { 'Cache-Control': 'no-store, no-cache, must-revalidate' } },
+    );
+  } catch (error) {
+    logger.error('Session read error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * PUT - retrieve full credentials (including password) for session restoration.
+ * Protected by multiple Sec-Fetch-* headers to ensure only same-origin
+ * browser fetch() requests succeed. Non-browser clients cannot forge these.
+ */
+export async function PUT(request: NextRequest) {
+  try {
+    // Require all Sec-Fetch-* headers to match a same-origin fetch() call.
+    // Browsers set these automatically and they cannot be overridden by JS.
+    const secFetchSite = request.headers.get('sec-fetch-site');
+    const secFetchMode = request.headers.get('sec-fetch-mode');
+    const secFetchDest = request.headers.get('sec-fetch-dest');
+    if (secFetchSite !== 'same-origin' || secFetchMode !== 'cors' || secFetchDest !== 'empty') {
+      return NextResponse.json({ error: 'Forbidden' }, { status: 403 });
+    }
+
+    const slot = getSlot(request);
+    const cookieName = sessionCookieName(slot);
+    const cookieStore = await cookies();
+    const token = cookieStore.get(cookieName)?.value;
+
+    if (!token) {
+      return NextResponse.json({ error: 'No session' }, { status: 401 });
+    }
+
+    const credentials = decryptSession(token);
+    if (!credentials) {
+      cookieStore.delete(cookieName);
+      clearStalwartAuthContextInStore(cookieStore, slot);
+      return NextResponse.json({ error: 'Invalid session' }, { status: 401 });
+    }
+
+    setStalwartAuthContextInStore(cookieStore, slot, {
+      serverUrl: credentials.serverUrl,
+      username: credentials.username,
+      authHeader: `Basic ${Buffer.from(`${credentials.username}:${credentials.password}`).toString('base64')}`,
+    });
+
     return NextResponse.json(credentials, {
       headers: { 'Cache-Control': 'no-store, no-cache, must-revalidate' },
     });
@@ -76,13 +199,15 @@ export async function DELETE(request: NextRequest) {
     const all = request.nextUrl.searchParams.get('all') === 'true';
 
     if (all) {
-      // Delete all session cookies (slots 0-4)
-      for (let i = 0; i <= 4; i++) {
+      // Delete all session cookies across every slot.
+      for (let i = 0; i < MAX_ACCOUNT_SLOTS; i++) {
         cookieStore.delete(sessionCookieName(i));
+        clearStalwartAuthContextInStore(cookieStore, i);
       }
     } else {
       const slot = getSlot(request);
       cookieStore.delete(sessionCookieName(slot));
+      clearStalwartAuthContextInStore(cookieStore, slot);
     }
 
     return NextResponse.json({ ok: true });

app/api/auth/sso/complete/route.ts

@@ -0,0 +1,126 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import { logger } from '@/lib/logger';
+import { decryptPayload } from '@/lib/auth/crypto';
+import {
+  exchangeCodeForTokens,
+  getRequiredConfig,
+  getTokenEndpoint,
+} from '@/lib/oauth/token-exchange';
+import { refreshTokenCookieName, refreshTokenServerCookieName } from '@/lib/oauth/tokens';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+
+const SSO_PENDING_COOKIE = 'sso_pending';
+const SSO_PENDING_MAX_AGE_MS = 5 * 60 * 1000; // 5 minutes
+
+export async function POST(request: NextRequest) {
+  const cookieStore = await cookies();
+
+  try {
+    const { code, state, slot: bodySlot } = await request.json();
+
+    if (!code || !state) {
+      return NextResponse.json({ error: 'Missing code or state' }, { status: 400 });
+    }
+
+    // Per-account refresh-token cookie slot. Without this the route hardcoded
+    // slot 0, so the "+ Add Account" flow overwrote the first account's
+    // refresh-token cookie. Default to 0 for back-compat with any caller that
+    // omits slot. Mirrors the validation in /api/auth/token POST.
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : 0;
+
+    // Read and decrypt the pending SSO cookie
+    const pendingCookie = cookieStore.get(SSO_PENDING_COOKIE)?.value;
+    if (!pendingCookie) {
+      logger.warn('SSO complete: no pending cookie found');
+      return NextResponse.json({ error: 'No pending SSO session. Please start the login flow again.' }, { status: 400 });
+    }
+
+    const pending = decryptPayload(pendingCookie);
+    if (!pending) {
+      cookieStore.delete(SSO_PENDING_COOKIE);
+      return NextResponse.json({ error: 'Invalid SSO session' }, { status: 400 });
+    }
+
+    // Validate state
+    if (pending.state !== state) {
+      logger.warn('SSO complete: state mismatch');
+      cookieStore.delete(SSO_PENDING_COOKIE);
+      return NextResponse.json({ error: 'State mismatch' }, { status: 400 });
+    }
+
+    // Validate TTL
+    const createdAt = pending.created_at as number;
+    if (!createdAt || Date.now() - createdAt > SSO_PENDING_MAX_AGE_MS) {
+      logger.warn('SSO complete: pending session expired');
+      cookieStore.delete(SSO_PENDING_COOKIE);
+      return NextResponse.json({ error: 'SSO session expired. Please try again.' }, { status: 400 });
+    }
+
+    const codeVerifier = pending.code_verifier as string;
+    const redirectUri = pending.redirect_uri as string;
+    const pendingServerId = typeof pending.server_id === 'string' ? pending.server_id : null;
+    const mobileRedirectUri =
+      typeof pending.mobile_redirect_uri === 'string' ? pending.mobile_redirect_uri : null;
+    const mobileState = typeof pending.mobile_state === 'string' ? pending.mobile_state : null;
+    const isMobileFlow = Boolean(mobileRedirectUri);
+
+    if (!codeVerifier || !redirectUri) {
+      cookieStore.delete(SSO_PENDING_COOKIE);
+      return NextResponse.json({ error: 'Invalid SSO session data' }, { status: 400 });
+    }
+
+    // Exchange code for tokens
+    const tokens = await exchangeCodeForTokens(code, codeVerifier, redirectUri, pendingServerId);
+
+    // For the mobile handoff flow the tokens are handed back to the app
+    // verbatim - we deliberately don't write any cookies on the webmail
+    // origin (the mobile browser tab disposes of the session after the
+    // redirect anyway, but the cookie would still get committed to the
+    // user's main webmail session if they happened to be logged in there).
+    if (!isMobileFlow) {
+      if (tokens.refresh_token) {
+        const cookieName = refreshTokenCookieName(slot);
+        cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
+      }
+      const serverCookieName = refreshTokenServerCookieName(slot);
+      if (pendingServerId) {
+        cookieStore.set(serverCookieName, pendingServerId, getCookieOptions());
+      } else {
+        cookieStore.delete(serverCookieName);
+      }
+    }
+
+    // Delete pending cookie
+    cookieStore.delete(SSO_PENDING_COOKIE);
+
+    if (isMobileFlow) {
+      // The mobile client needs the bits it can't re-derive: the refresh
+      // token, the token endpoint it should hit to refresh later, and the
+      // client_id the IdP expects on that refresh call. The server URL is
+      // returned so the app knows which JMAP host to connect to.
+      const { clientId, serverUrl } = getRequiredConfig(pendingServerId);
+      const tokenEndpoint = await getTokenEndpoint(pendingServerId);
+      return NextResponse.json({
+        access_token: tokens.access_token,
+        expires_in: tokens.expires_in,
+        refresh_token: tokens.refresh_token,
+        token_endpoint: tokenEndpoint,
+        client_id: clientId,
+        server_url: serverUrl,
+        mobile_redirect_uri: mobileRedirectUri,
+        mobile_state: mobileState,
+      });
+    }
+
+    return NextResponse.json({
+      access_token: tokens.access_token,
+      expires_in: tokens.expires_in,
+    });
+  } catch (error) {
+    // Clean up pending cookie on any error
+    cookieStore.delete(SSO_PENDING_COOKIE);
+    logger.error('SSO complete error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Token exchange failed' }, { status: 401 });
+  }
+}

app/api/auth/sso/start/route.ts

@@ -0,0 +1,121 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import { logger } from '@/lib/logger';
+import { encryptPayload } from '@/lib/auth/crypto';
+import { generateCodeVerifierServer, generateCodeChallengeServer, generateStateServer } from '@/lib/oauth/pkce-server';
+import { getRequiredConfig } from '@/lib/oauth/token-exchange';
+import { discoverOAuth } from '@/lib/oauth/discovery';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { getOauthScopes } from '@/lib/oauth/tokens';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { hasSessionSecret } from '@/lib/auth/session-secret';
+
+const SSO_PENDING_COOKIE = 'sso_pending';
+const SSO_PENDING_MAX_AGE = 300; // 5 minutes
+
+// The mobile app's deep-link scheme. Only redirect targets starting with
+// this prefix may flow through the mobile handoff path; without the guard
+// the SSO complete route would be coerced into returning tokens to whatever
+// caller-controlled URL the attacker chose.
+const MOBILE_REDIRECT_SCHEME = 'bulwarkmobile://';
+
+export async function POST(request: NextRequest) {
+  try {
+    if (!hasSessionSecret()) {
+      return NextResponse.json({ error: 'SESSION_SECRET is required for SSO' }, { status: 500 });
+    }
+
+    const {
+      redirect_uri,
+      locale,
+      server_id: bodyServerId,
+      mobile_redirect_uri: rawMobileRedirectUri,
+      mobile_state: rawMobileState,
+    } = await request.json();
+
+    if (!redirect_uri || typeof redirect_uri !== 'string') {
+      return NextResponse.json({ error: 'Missing redirect_uri' }, { status: 400 });
+    }
+
+    const mobileRedirectUri =
+      typeof rawMobileRedirectUri === 'string' && rawMobileRedirectUri
+        ? rawMobileRedirectUri
+        : null;
+    const mobileState =
+      typeof rawMobileState === 'string' && rawMobileState ? rawMobileState : null;
+    if (mobileRedirectUri && !mobileRedirectUri.startsWith(MOBILE_REDIRECT_SCHEME)) {
+      return NextResponse.json({ error: 'Invalid mobile_redirect_uri' }, { status: 400 });
+    }
+
+    const serverId = typeof bodyServerId === 'string' && bodyServerId ? bodyServerId : null;
+
+    // Validate redirect_uri origin matches the request origin to prevent open redirects
+    const requestOrigin = request.headers.get('origin') || request.nextUrl.origin;
+    try {
+      const redirectOrigin = new URL(redirect_uri).origin;
+      if (redirectOrigin !== requestOrigin) {
+        logger.warn('SSO start: redirect_uri origin mismatch', { redirectOrigin, requestOrigin });
+        return NextResponse.json({ error: 'Invalid redirect_uri' }, { status: 400 });
+      }
+    } catch {
+      return NextResponse.json({ error: 'Invalid redirect_uri' }, { status: 400 });
+    }
+
+    const { clientId, discoveryUrl } = getRequiredConfig(serverId);
+    const metadata = await discoverOAuth(discoveryUrl, { validateEndpoint: isPublicHttpUrl });
+
+    if (!metadata?.authorization_endpoint) {
+      return NextResponse.json({ error: 'OAuth discovery failed' }, { status: 502 });
+    }
+
+    // Generate PKCE + state server-side
+    const codeVerifier = generateCodeVerifierServer();
+    const codeChallenge = generateCodeChallengeServer(codeVerifier);
+    const state = generateStateServer();
+
+    // Encrypt and store in httpOnly cookie. server_id is captured here so the
+    // /complete handler reaches the same OAuth endpoint we used to authorize.
+    // Mobile params are captured here so /complete knows to return tokens to
+    // the caller (in the JSON response) instead of writing the usual server
+    // cookies - and so the callback page can redirect back to the app.
+    const pendingData = {
+      state,
+      code_verifier: codeVerifier,
+      redirect_uri,
+      created_at: Date.now(),
+      ...(serverId ? { server_id: serverId } : {}),
+      ...(mobileRedirectUri ? { mobile_redirect_uri: mobileRedirectUri } : {}),
+      ...(mobileState ? { mobile_state: mobileState } : {}),
+    };
+
+    const encrypted = encryptPayload(pendingData);
+    const cookieStore = await cookies();
+    const baseCookieOpts = getCookieOptions();
+    cookieStore.set(SSO_PENDING_COOKIE, encrypted, {
+      ...baseCookieOpts,
+      maxAge: SSO_PENDING_MAX_AGE,
+    });
+
+    // Build authorize URL
+    const authUrl = new URL(metadata.authorization_endpoint);
+    authUrl.searchParams.set('response_type', 'code');
+    authUrl.searchParams.set('client_id', clientId);
+    authUrl.searchParams.set('redirect_uri', redirect_uri);
+    authUrl.searchParams.set('scope', getOauthScopes());
+    authUrl.searchParams.set('state', state);
+    authUrl.searchParams.set('code_challenge', codeChallenge);
+    authUrl.searchParams.set('code_challenge_method', 'S256');
+
+    if (locale) {
+      authUrl.searchParams.set('ui_locales', locale);
+    }
+
+    return NextResponse.json({
+      authorize_url: authUrl.toString(),
+      state,
+    });
+  } catch (error) {
+    logger.error('SSO start error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/auth/stalwart-context/route.ts

@@ -0,0 +1,96 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { logger } from '@/lib/logger';
+import { JmapAuthVerificationError, assertBasicAuthMatchesUsername, normalizeJmapServerUrl, validateProxyAuthHeader, verifyJmapAuth } from '@/lib/auth/verify-jmap-auth';
+import { setStalwartAuthContext } from '@/lib/stalwart/auth-context';
+import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
+import { parseJmapServers, resolveTrustedJmapUrl } from '@/lib/admin/jmap-servers';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
+
+function getSlot(request: NextRequest, bodySlot: unknown): number {
+  if (typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot < MAX_ACCOUNT_SLOTS) {
+    return bodySlot;
+  }
+
+  const raw = request.nextUrl.searchParams.get('slot');
+  if (raw === null) return 0;
+
+  const slot = parseInt(raw, 10);
+  return Number.isNaN(slot) || slot < 0 || slot >= MAX_ACCOUNT_SLOTS ? 0 : slot;
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const { serverUrl, username, authHeader, slot: bodySlot } = await request.json();
+
+    if (!serverUrl || !username || !authHeader) {
+      return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
+    }
+
+    // Pin the upstream URL to a configured JMAP server (single `jmapServerUrl`
+    // or any entry in `jmapServers`). Falls back to the request URL only when
+    // `allowCustomJmapEndpoint` is enabled, and even then it must be public.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
+    const serverList = parseJmapServers(configManager.get<unknown>('jmapServers', []));
+    const trustedUrl = resolveTrustedJmapUrl(serverUrl, configuredServerUrl, serverList);
+
+    let upstreamUrl: string;
+    let upstreamTrusted: boolean;
+    if (trustedUrl) {
+      upstreamUrl = trustedUrl;
+      upstreamTrusted = true;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        return NextResponse.json({ error: 'Server URL is not allowed' }, { status: 400 });
+      }
+      upstreamUrl = serverUrl;
+      upstreamTrusted = false;
+    } else {
+      return NextResponse.json({ error: 'JMAP server not configured' }, { status: 500 });
+    }
+
+    const slot = getSlot(request, bodySlot);
+    // Trusted (admin-configured) URLs skip the upstream re-fetch, but we
+    // still bind the cookie's `username` to the credential when we can verify
+    // locally. Without this, a caller can POST username="admin@host" +
+    // authHeader=<their own Basic creds>, and downstream consumers that read
+    // the cookie-derived username (audit logs, login tracker) accept the
+    // spoof. Bearer tokens are opaque so only the format check runs;
+    // authorization sinks must key off the credential itself, not the
+    // cookie's username claim (see admin/auth's authHeader-hashed cache key).
+    let normalizedServerUrl: string;
+    if (upstreamTrusted) {
+      validateProxyAuthHeader(authHeader);
+      assertBasicAuthMatchesUsername(authHeader, username);
+      normalizedServerUrl = normalizeJmapServerUrl(upstreamUrl);
+    } else {
+      normalizedServerUrl = await verifyJmapAuth(upstreamUrl, authHeader, { trusted: false });
+    }
+
+    await setStalwartAuthContext(slot, {
+      serverUrl: normalizedServerUrl,
+      username,
+      authHeader,
+    });
+
+    void recordLogin(username, normalizedServerUrl);
+
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    if (error instanceof JmapAuthVerificationError) {
+      return NextResponse.json({ error: error.message }, { status: error.status });
+    }
+
+    logger.error('Failed to store Stalwart auth context', {
+      error: error instanceof Error ? error.message : 'Unknown error',
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/auth/token/route.ts

@@ -1,111 +1,50 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { cookies } from 'next/headers';
 import { logger } from '@/lib/logger';
-import { discoverOAuth } from '@/lib/oauth/discovery';
-import { refreshTokenCookieName } from '@/lib/oauth/tokens';
-
-const CLIENT_SECRET = process.env.OAUTH_CLIENT_SECRET || '';
-
-const COOKIE_OPTIONS = {
-  httpOnly: true,
-  secure: process.env.NODE_ENV === 'production',
-  sameSite: 'lax' as const,
-  path: '/',
-  maxAge: 30 * 24 * 60 * 60,
-};
+import { refreshTokenCookieName, refreshTokenServerCookieName } from '@/lib/oauth/tokens';
+import { exchangeCodeForTokens, buildOAuthParams, getMetadata, getTokenEndpoint } from '@/lib/oauth/token-exchange';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
 
 function getSlot(request: NextRequest): number {
   const raw = request.nextUrl.searchParams.get('slot');
   if (raw === null) return 0;
   const slot = parseInt(raw, 10);
-  if (isNaN(slot) || slot < 0 || slot > 4) return 0;
+  if (isNaN(slot) || slot < 0 || slot >= MAX_ACCOUNT_SLOTS) return 0;
   return slot;
 }
 
-
-function getRequiredConfig() {
-  const clientId = process.env.OAUTH_CLIENT_ID;
-  const serverUrl = process.env.JMAP_SERVER_URL || process.env.NEXT_PUBLIC_JMAP_SERVER_URL;
-  const issuerUrl = process.env.OAUTH_ISSUER_URL;
-  if (!clientId || !serverUrl) {
-    throw new Error(`OAuth misconfigured: ${[!clientId && 'OAUTH_CLIENT_ID', !serverUrl && 'JMAP_SERVER_URL'].filter(Boolean).join(', ')} not set`);
-  }
-  const discoveryUrl = issuerUrl?.trim() || serverUrl;
-  if (issuerUrl !== undefined && !issuerUrl.trim()) {
-    logger.warn('OAUTH_ISSUER_URL is set but empty, falling back to JMAP_SERVER_URL for discovery');
-  }
-  return { clientId, serverUrl, discoveryUrl };
-}
-
-async function getTokenEndpoint(): Promise<string> {
-  const { discoveryUrl } = getRequiredConfig();
-  const metadata = await discoverOAuth(discoveryUrl);
-  if (!metadata?.token_endpoint) {
-    throw new Error('OAuth token endpoint not found');
-  }
-  return metadata.token_endpoint;
-}
-
-async function getMetadata(): Promise<import('@/lib/oauth/discovery').OAuthMetadata | null> {
-  const { discoveryUrl } = getRequiredConfig();
-  return discoverOAuth(discoveryUrl);
-}
-
-function buildOAuthParams(base: Record<string, string>): URLSearchParams {
-  const { clientId } = getRequiredConfig();
-  const params = new URLSearchParams({ ...base, client_id: clientId });
-  if (CLIENT_SECRET) {
-    params.set('client_secret', CLIENT_SECRET);
-  }
-  return params;
-}
-
 export async function POST(request: NextRequest) {
   try {
-    const { code, code_verifier, redirect_uri, slot: bodySlot } = await request.json();
+    const { code, code_verifier, redirect_uri, slot: bodySlot, server_id: bodyServerId } = await request.json();
 
     if (!code || !code_verifier || !redirect_uri) {
       return NextResponse.json({ error: 'Missing required parameters' }, { status: 400 });
     }
 
-    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : getSlot(request);
-    const tokenEndpoint = await getTokenEndpoint();
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot < MAX_ACCOUNT_SLOTS ? bodySlot : getSlot(request);
+    const serverId = typeof bodyServerId === 'string' && bodyServerId ? bodyServerId : null;
 
-    const params = buildOAuthParams({
-      grant_type: 'authorization_code',
-      code,
-      redirect_uri,
-      code_verifier,
-    });
-
-    const tokenResponse = await fetch(tokenEndpoint, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
-      body: params.toString(),
-    });
-
-    if (!tokenResponse.ok) {
-      const errorText = await tokenResponse.text();
-      logger.error('Token exchange failed', { status: tokenResponse.status, error: errorText });
-      return NextResponse.json({ error: 'Token exchange failed' }, { status: 401 });
-    }
-
-    const tokens = await tokenResponse.json();
-
-    if (!tokens.access_token) {
-      logger.error('Token response missing access_token', { response: JSON.stringify(tokens).substring(0, 500) });
-      return NextResponse.json({ error: 'Invalid token response' }, { status: 502 });
-    }
+    const tokens = await exchangeCodeForTokens(code, code_verifier, redirect_uri, serverId);
 
     const response = NextResponse.json({
       access_token: tokens.access_token,
-      expires_in: tokens.expires_in || 3600,
+      expires_in: tokens.expires_in,
     });
 
+    const cookieStore = await cookies();
     if (tokens.refresh_token) {
       const cookieName = refreshTokenCookieName(slot);
-      const cookieStore = await cookies();
-      cookieStore.set(cookieName, tokens.refresh_token, COOKIE_OPTIONS);
+      cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
+    }
+    // Persist which server entry minted this refresh token so the PUT/DELETE
+    // handlers can route the refresh/revocation calls to the right token
+    // endpoint without the client having to track it across page loads.
+    const serverCookieName = refreshTokenServerCookieName(slot);
+    if (serverId) {
+      cookieStore.set(serverCookieName, serverId, getCookieOptions());
+    } else {
+      cookieStore.delete(serverCookieName);
     }
 
     return response;
@@ -121,17 +60,18 @@ export async function PUT(request: NextRequest) {
     const cookieName = refreshTokenCookieName(slot);
     const cookieStore = await cookies();
     const refreshToken = cookieStore.get(cookieName)?.value;
+    const serverId = cookieStore.get(refreshTokenServerCookieName(slot))?.value || null;
 
     if (!refreshToken) {
       return NextResponse.json({ error: 'No refresh token' }, { status: 401 });
     }
 
-    const tokenEndpoint = await getTokenEndpoint();
+    const tokenEndpoint = await getTokenEndpoint(serverId);
 
     const params = buildOAuthParams({
       grant_type: 'refresh_token',
       refresh_token: refreshToken,
-    });
+    }, serverId);
 
     const tokenResponse = await fetch(tokenEndpoint, {
       method: 'POST',
@@ -143,6 +83,7 @@ export async function PUT(request: NextRequest) {
       const errorText = await tokenResponse.text();
       logger.error('Token refresh failed', { status: tokenResponse.status, error: errorText });
       cookieStore.delete(cookieName);
+      cookieStore.delete(refreshTokenServerCookieName(slot));
       return NextResponse.json({ error: 'Refresh failed' }, { status: 401 });
     }
 
@@ -154,7 +95,7 @@ export async function PUT(request: NextRequest) {
     }
 
     if (tokens.refresh_token) {
-      cookieStore.set(cookieName, tokens.refresh_token, COOKIE_OPTIONS);
+      cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
     }
 
     return NextResponse.json({
@@ -172,17 +113,19 @@ export async function DELETE(request: NextRequest) {
     const all = request.nextUrl.searchParams.get('all') === 'true';
 
     if (all) {
-      // Revoke and delete all refresh token cookies (slots 0-4)
+      // Revoke and delete all refresh token cookies across every slot.
       const cookieStore = await cookies();
-      for (let i = 0; i <= 4; i++) {
+      for (let i = 0; i < MAX_ACCOUNT_SLOTS; i++) {
         const name = refreshTokenCookieName(i);
+        const serverCookieName = refreshTokenServerCookieName(i);
         const token = cookieStore.get(name)?.value;
+        const slotServerId = cookieStore.get(serverCookieName)?.value || null;
         if (token) {
           // Best-effort revocation
           try {
-            const metadata = await getMetadata().catch(() => null);
+            const metadata = await getMetadata(slotServerId).catch(() => null);
             if (metadata?.revocation_endpoint) {
-              const params = buildOAuthParams({ token, token_type_hint: 'refresh_token' });
+              const params = buildOAuthParams({ token, token_type_hint: 'refresh_token' }, slotServerId);
               await fetch(metadata.revocation_endpoint, {
                 method: 'POST',
                 headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
@@ -192,6 +135,7 @@ export async function DELETE(request: NextRequest) {
           } catch { /* best effort */ }
           cookieStore.delete(name);
         }
+        cookieStore.delete(serverCookieName);
       }
       return NextResponse.json({ ok: true });
     }
@@ -200,7 +144,8 @@ export async function DELETE(request: NextRequest) {
     const cookieName = refreshTokenCookieName(slot);
     const cookieStore = await cookies();
     const refreshToken = cookieStore.get(cookieName)?.value;
-    const metadata = await getMetadata().catch((err) => {
+    const slotServerId = cookieStore.get(refreshTokenServerCookieName(slot))?.value || null;
+    const metadata = await getMetadata(slotServerId).catch((err) => {
       logger.warn('Failed to discover OAuth metadata during logout', {
         error: err instanceof Error ? err.message : 'Unknown error',
       });
@@ -212,7 +157,7 @@ export async function DELETE(request: NextRequest) {
         const params = buildOAuthParams({
           token: refreshToken,
           token_type_hint: 'refresh_token',
-        });
+        }, slotServerId);
 
         try {
           const revocationResponse = await fetch(metadata.revocation_endpoint, {
@@ -230,6 +175,7 @@ export async function DELETE(request: NextRequest) {
 
       cookieStore.delete(cookieName);
     }
+    cookieStore.delete(refreshTokenServerCookieName(slot));
 
     let end_session_url: string | undefined;
     if (metadata?.end_session_endpoint) {

app/api/auth/totp-token-exchange/route.ts

@@ -0,0 +1,242 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import { logger } from '@/lib/logger';
+import { discoverOAuth } from '@/lib/oauth/discovery';
+import { refreshTokenCookieName, refreshTokenServerCookieName } from '@/lib/oauth/tokens';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { readFileEnv } from '@/lib/read-file-env';
+import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
+import { parseJmapServers, findServerByUrl, findServerById } from '@/lib/admin/jmap-servers';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
+
+/**
+ * Exchange basic auth credentials (with TOTP appended) for OAuth tokens.
+ *
+ * This allows 2FA users who log in with basic auth + TOTP to upgrade
+ * to token-based auth, avoiding session expiry when the TOTP rotates.
+ *
+ * Tries three strategies:
+ * 1. ROPC grant with client_id (if OAUTH_CLIENT_ID is set)
+ * 2. ROPC grant without client_id
+ * 3. ROPC grant authenticated via Basic Auth header (Stalwart-style)
+ */
+
+async function tryTokenRequest(
+  tokenEndpoint: string,
+  params: URLSearchParams,
+  extraHeaders?: Record<string, string>,
+): Promise<{ ok: true; tokens: { access_token: string; expires_in?: number; refresh_token?: string } } | { ok: false; status: number; error: string }> {
+  try {
+    const headers: Record<string, string> = { 'Content-Type': 'application/x-www-form-urlencoded', ...extraHeaders };
+    const response = await fetch(tokenEndpoint, {
+      method: 'POST',
+      headers,
+      body: params.toString(),
+    });
+
+    if (!response.ok) {
+      const errorText = await response.text();
+      return { ok: false, status: response.status, error: errorText.substring(0, 500) };
+    }
+
+    const tokens = await response.json();
+    if (!tokens.access_token) {
+      return { ok: false, status: 502, error: 'Response missing access_token' };
+    }
+
+    return { ok: true, tokens };
+  } catch (err) {
+    return { ok: false, status: 0, error: err instanceof Error ? err.message : String(err) };
+  }
+}
+
+async function findTokenEndpoint(serverUrl: string): Promise<string | null> {
+  // 1. Try OAuth discovery
+  const metadata = await discoverOAuth(serverUrl, { validateEndpoint: isPublicHttpUrl });
+  if (metadata?.token_endpoint) return metadata.token_endpoint;
+
+  // 2. Try common Stalwart token endpoint paths directly
+  const candidates = [
+    `${serverUrl}/auth/token`,
+    `${serverUrl}/api/oauth/token`,
+  ];
+
+  for (const url of candidates) {
+    try {
+      // A POST with no body should return 400 (bad request) rather than 404 if the endpoint exists
+      const probe = await fetch(url, { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded' }, body: 'grant_type=probe' });
+      if (probe.status !== 404 && probe.status !== 405) {
+        return url;
+      }
+    } catch {
+      // Network error - endpoint not reachable
+    }
+  }
+
+  return null;
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const { serverUrl, username, password, slot: bodySlot, server_id: bodyServerId } = await request.json();
+
+    if (!serverUrl || !username || !password) {
+      return NextResponse.json({ error: 'Missing required parameters' }, { status: 400 });
+    }
+
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot < MAX_ACCOUNT_SLOTS ? bodySlot : 0;
+    const requestedServerId = typeof bodyServerId === 'string' && bodyServerId ? bodyServerId : null;
+
+    // Pin the upstream URL to a configured JMAP server. The list of allowed
+    // servers is `jmapServerUrl` plus any entry from `jmapServers`. Only when
+    // no server is configured (and the deployment explicitly allows custom
+    // JMAP endpoints) do we fall back to the user-supplied URL - and even then
+    // it must resolve to a public address.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
+    const serverList = parseJmapServers(configManager.get<unknown>('jmapServers', []));
+
+    let upstreamUrl: string;
+    let resolvedServerId: string | null = null;
+    const requestedEntry = findServerById(serverList, requestedServerId);
+    const matchedEntry = requestedEntry || findServerByUrl(serverList, serverUrl);
+
+    if (matchedEntry) {
+      upstreamUrl = matchedEntry.url;
+      resolvedServerId = matchedEntry.id;
+    } else if (configuredServerUrl) {
+      upstreamUrl = configuredServerUrl;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        logger.warn('TOTP token exchange: rejected non-public server URL');
+        return NextResponse.json({ error: 'invalid_server_url' }, { status: 400 });
+      }
+      upstreamUrl = serverUrl;
+    } else {
+      return NextResponse.json({ error: 'jmap_server_not_configured' }, { status: 500 });
+    }
+
+    const tokenEndpoint = await findTokenEndpoint(upstreamUrl);
+    if (!tokenEndpoint) {
+      logger.warn('TOTP token exchange: no token endpoint found');
+      return NextResponse.json({ error: 'no_token_endpoint', detail: 'Could not discover OAuth token endpoint on the mail server' }, { status: 404 });
+    }
+
+    return await attemptAllStrategies(tokenEndpoint, upstreamUrl, username, password, slot, resolvedServerId);
+  } catch (error) {
+    logger.error('TOTP token exchange error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+async function attemptAllStrategies(
+  tokenEndpoint: string,
+  serverUrl: string,
+  username: string,
+  password: string,
+  slot: number,
+  serverId: string | null,
+): Promise<NextResponse> {
+  logger.info('TOTP token exchange: found token endpoint', { tokenEndpoint });
+
+  // Per-server OAuth credentials override the global ones when the requested
+  // server entry has its own oauth block configured.
+  const serverList = parseJmapServers(configManager.get<unknown>('jmapServers', []));
+  const entry = findServerById(serverList, serverId);
+  const clientId = entry?.oauth?.clientId
+    || configManager.get<string>('oauthClientId', '')
+    || process.env.OAUTH_CLIENT_ID;
+  const clientSecret = entry?.oauth?.clientSecret
+    || configManager.get<string>('oauthClientSecret', '')
+    || process.env.OAUTH_CLIENT_SECRET
+    || readFileEnv(process.env.OAUTH_CLIENT_SECRET_FILE);
+  const basicAuth = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
+  const attempts: Array<{ strategy: string; error: string }> = [];
+
+  // Strategy 1: ROPC with client_id (if configured)
+  if (clientId) {
+    const params = new URLSearchParams({ grant_type: 'password', username, password, client_id: clientId });
+    if (clientSecret) params.set('client_secret', clientSecret);
+    const result = await tryTokenRequest(tokenEndpoint, params);
+    if (result.ok) {
+      logger.info('TOTP token exchange succeeded (ROPC with client_id)');
+      void recordLogin(username, serverUrl);
+      return await storeAndRespond(result.tokens, slot, serverId);
+    }
+    attempts.push({ strategy: 'ROPC with client_id', error: result.error });
+  }
+
+  // Strategy 2: ROPC without client_id
+  {
+    const params = new URLSearchParams({ grant_type: 'password', username, password });
+    const result = await tryTokenRequest(tokenEndpoint, params);
+    if (result.ok) {
+      logger.info('TOTP token exchange succeeded (ROPC without client_id)');
+      void recordLogin(username, serverUrl);
+      return await storeAndRespond(result.tokens, slot, serverId);
+    }
+    attempts.push({ strategy: 'ROPC without client_id', error: result.error });
+  }
+
+  // Strategy 3: Basic Auth header on token endpoint (some servers accept this)
+  {
+    const params = new URLSearchParams({ grant_type: 'password' });
+    const result = await tryTokenRequest(tokenEndpoint, params, { 'Authorization': basicAuth });
+    if (result.ok) {
+      logger.info('TOTP token exchange succeeded (Basic Auth header)');
+      void recordLogin(username, serverUrl);
+      return await storeAndRespond(result.tokens, slot, serverId);
+    }
+    attempts.push({ strategy: 'Basic Auth header', error: result.error });
+  }
+
+  // Strategy 4: client_credentials with Basic Auth (last resort)
+  {
+    const params = new URLSearchParams({ grant_type: 'client_credentials' });
+    const result = await tryTokenRequest(tokenEndpoint, params, { 'Authorization': basicAuth });
+    if (result.ok) {
+      logger.info('TOTP token exchange succeeded (client_credentials + Basic Auth)');
+      void recordLogin(username, serverUrl);
+      return await storeAndRespond(result.tokens, slot, serverId);
+    }
+    attempts.push({ strategy: 'client_credentials + Basic Auth', error: result.error });
+  }
+
+  logger.warn('TOTP token exchange: all strategies failed', { attempts });
+  return NextResponse.json({
+    error: 'token_exchange_failed',
+    detail: 'All token exchange strategies failed',
+    attempts,
+  }, { status: 502 });
+}
+
+async function storeAndRespond(
+  tokens: { access_token: string; expires_in?: number; refresh_token?: string },
+  slot: number,
+  serverId: string | null,
+): Promise<NextResponse> {
+  const cookieStore = await cookies();
+  if (tokens.refresh_token) {
+    const cookieName = refreshTokenCookieName(slot);
+    cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
+  }
+  const serverCookieName = refreshTokenServerCookieName(slot);
+  if (serverId) {
+    cookieStore.set(serverCookieName, serverId, getCookieOptions());
+  } else {
+    cookieStore.delete(serverCookieName);
+  }
+
+  return NextResponse.json({
+    access_token: tokens.access_token,
+    expires_in: tokens.expires_in || 3600,
+    has_refresh_token: !!tokens.refresh_token,
+  });
+}