chore: update version to 1.4.14

Two issues prevented tasks created in Thunderbird (or other CalDAV
clients) from appearing in the task view:

1. percentComplete was not in CALENDAR_TASK_PROPERTIES, so it was
   never requested from the server and the heuristic check for it
   was always false (dead code).

2. The hasTaskFields heuristic used strict value checks:
   - 'progress' in obj && typeof obj.progress === 'string'
     → fails when Stalwart returns progress: null instead of the
       RFC 8984 default "needs-action"
   - 'due' in obj && obj.due != null
     → fails when Stalwart includes due: null for tasks without a
       DUE date (key present, value null)

RFC 8984 §5.2 defines due, progress and percentComplete as Task-only
properties — a VEVENT will never include them in a JMAP response.
Checking for key presence alone (even when null) is therefore a
reliable discriminator, regardless of the actual value.

.claude/settings.local.json

@@ -0,0 +1,7 @@
+{
+  "permissions": {
+    "allow": [
+      "WebFetch(domain:github.com)"
+    ]
+  }
+}

.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
 # =============================================================================
@@ -41,6 +48,8 @@ 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 +62,8 @@ 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
@@ -65,7 +76,7 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 
 # Directory for storing encrypted settings files (default: ./data/settings).
 # For Docker, the working directory is /app, so the default resolves to
-# /app/data/settings — mount a persistent volume there:
+# /app/data/settings - mount a persistent volume there:
 #   volumes:
 #     - bulwark-settings:/app/data/settings
 # SETTINGS_DATA_DIR=./data/settings
@@ -95,41 +106,81 @@ 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
 
 # =============================================================================

.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.yml

@@ -21,11 +21,23 @@ on:
       - ".github/workflows/docker-publish.yml"
   workflow_dispatch:
 
-env:
-  IMAGE_NAME: ghcr.io/${{ github.repository }}
-
 jobs:
+  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:
@@ -57,7 +69,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ env.IMAGE_NAME }}
+          images: ${{ needs.prepare.outputs.image_name }}
 
       - name: Build and push by digest
         id: build
@@ -66,7 +78,7 @@ jobs:
           context: .
           platforms: ${{ matrix.platform }}
           labels: ${{ steps.meta.outputs.labels }}
-          outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+          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 }}
 
@@ -86,7 +98,7 @@ jobs:
 
   merge:
     runs-on: ubuntu-latest
-    needs: build
+    needs: [prepare, build]
     permissions:
       contents: read
       packages: write
@@ -113,17 +125,17 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ env.IMAGE_NAME }}
+          images: ${{ needs.prepare.outputs.image_name }}
           tags: |
-            type=raw,value={{branch}}
-            type=sha,prefix={{branch}}-
+            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") \
-            $(printf '${{ env.IMAGE_NAME }}@sha256:%s ' *)
+            $(printf '${{ needs.prepare.outputs.image_name }}@sha256:%s ' *)
 
       - name: Inspect image
         run: |
-          docker buildx imagetools inspect ${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}
+          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

.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 +1,198 @@
 # Changelog
 
+## 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
@@ -287,7 +480,7 @@
 ### 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)
@@ -297,7 +490,7 @@
 - **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

@@ -1,9 +1,9 @@
 <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>
@@ -12,6 +12,17 @@
 
 Thank you for your interest in contributing to Bulwark Webmail! This document provides guidelines and information for contributors.
 
+## Join our Community
+**New to the project or looking for a place to start?** You don't need to be an expert to contribute! Whether you need help setting up your environment, want to report a bug, or are interested in helping with translations, our Discord is the best place to connect.
+
+* **Get Support:** Get real-time help with development hurdles.
+* **Contribute:** Share ideas, suggest features, or help us improve documentation.
+* **Collaborate:** Meet the team and other contributors working to make Bulwark better.
+
+[**Join the Bulwark Discord Server**](https://discord.gg/tYCujymGrT)
+
+---
+
 ## Getting Started
 
 ### Development Setup
@@ -195,7 +206,7 @@ webmail/
 - **Never commit sensitive data** (API keys, passwords, etc.)
 - **Sanitize user input** and email content
 - **Block external content** by default for privacy
-- Report security vulnerabilities privately
+- Report security vulnerabilities privately (e.g. bulwark@rbm.systems)
 
 ## Questions?
 

README.md

@@ -13,7 +13,7 @@ Built with Next.js and the JMAP protocol.
 
 [![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-1.4.9-green.svg?logo=git&logoColor=white)](CHANGELOG.md)
+[![Version](https://img.shields.io/badge/version-1.4.14-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)
 
 </div>
@@ -26,16 +26,16 @@ Built with Next.js and the JMAP protocol.
 <tr>
 <td width="50%">
 
-<img src="screenshots/inbox.png" width="100%" alt="Inbox — three-pane layout with sidebar, email list, and viewer (dark mode)">
+<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
+**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
+**Calendar** - Month, week, day, and agenda views with event management
 
 </td>
 </tr>
@@ -44,14 +44,14 @@ Built with Next.js and the JMAP protocol.
 
 <img src="screenshots/contacts.png" width="100%" alt="Contacts">
 
-**Contacts** — Contact management with groups and vCard support
+**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
+**Files** - Cloud file browser with upload, preview, and folder navigation
 
 </td>
 </tr>
@@ -63,16 +63,16 @@ Built with Next.js and the JMAP protocol.
 <tr>
 <td width="50%">
 
-<img src="screenshots/inbox%20whitemode.png" width="100%" alt="Inbox — light mode">
+<img src="screenshots/inbox%20whitemode.png" width="100%" alt="Inbox - light mode">
 
-**Light mode** — Full theme support with intelligent color transformation
+**Light mode** - Full theme support with intelligent color transformation
 
 </td>
 <td width="50%">
 
 <img src="screenshots/settings.png" width="100%" alt="Settings">
 
-**Settings** — Appearance, identities, filters, templates, and more
+**Settings** - Appearance, identities, filters, templates, and more
 
 </td>
 </tr>
@@ -81,7 +81,7 @@ Built with Next.js and the JMAP protocol.
 
 <img src="screenshots/login.png" width="100%" alt="Login page">
 
-**Login** — Configurable branding with OAuth2/OIDC and 2FA support
+**Login** - Configurable branding with OAuth2/OIDC and 2FA support
 
 </td>
 <td width="50%">
@@ -94,34 +94,46 @@ Built with Next.js and the JMAP protocol.
 
 ### 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
+- **Read, compose, reply, reply-all, forward** with rich HTML rendering and a Tiptap-based rich text editor (inline image upload, drag-and-drop embedding)
+- **Threading** - Gmail-style inline expansion with thread navigation; optional conversation threading toggle
+- **Unified mailbox** - view emails across all accounts in a single list
+- **Draft auto-save** with discard confirmation; full draft editing with identity preservation
+- **Attachments** - upload, download, and inline preview; attachment-keyword warning if a file is forgotten
+- **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
 - **Answered/forwarded status icons** in email list and thread views
-- **Color tags/labels** and star/unstar
+- **Multi-tag per email** with color labels, reorderable tags, and drag-and-drop tag assignment
+- **Star/unstar** with configurable mark-as-read delay
 - **Virtual scrolling** for large mailboxes
 - **Quick reply** from the viewer
-- **Sender avatars** — favicon-based with negative caching for performance
+- **Hover actions** - configurable quick-action buttons on email rows with customizable placement
+- **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
+- **Plain text composer mode** and auto-select reply identity
+- **Reply-to addresses** support in the composer
+- **TNEF support** - extract Outlook `winmail.dat` message bodies and attachments automatically
+- **message/rfc822 unwrapping** for embedded messages
+- **Folder management** - create, rename, delete folders with icon picker and subfolder support
+- **Tag counts** - unread and total counts displayed in sidebar
+- **Browser history sync** - back/forward navigation mirrors mail view state
 
 ### 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
-- **Task management** — create, edit, and track tasks with due dates, priority, and completion status
+- **Month, week, day, and agenda views** with mini-calendar sidebar and a dedicated task list view
+- **Event hover preview** popover with configurable details
+- **Drag-and-drop rescheduling**, click-drag or double-click creation, edge-resize (15-min snap)
+- **Recurring events** with edit/delete scope (this / this and following / all) and client-side recurrence expansion
+- **Participant scheduling** - iMIP invitations sent on create and update (RFC 5545/6047 compliant), organizer/attendee UI, RSVP with trust assessment
+- **Inline calendar invitations** in email viewer - auto-detect `.ics`, RSVP, import
+- **iCalendar import** with preview, bulk create, and UID deduplication
+- **iCal / webcal subscriptions** with editing and batch import
+- **Birthday calendar** - auto-generated from contacts
+- **Virtual locations** - video conference URLs as first-class event fields
+- **Task management** - create, edit, and track tasks with due dates, priority, and completion status; external CalDAV client detection (Thunderbird)
+- **Shared calendars** with visual grouping in the sidebar
+- **CalDAV discovery** with automatic calendar home resolution for multi-account setups
 - **Week numbers** in mini-calendar sidebar
 - **Notifications** with configurable sound, alert persistence, and sound picker with preview playback
 - **Real-time sync** via JMAP push
@@ -129,77 +141,103 @@ Built with Next.js and the JMAP protocol.
 ### Contacts
 
 - **Contact management** with JMAP sync (RFC 9553/9610) and local fallback
+- **Multiple address books** - create, rename, drag-and-drop between books, with editor picker in contact form
+- **Collapsible sidebar** with address book grouping and bulk operations
 - **Contact groups** with group expansion and member management
 - **vCard import/export** (RFC 6350) with duplicate detection
+- **Trusted senders** stored in a dedicated JMAP address book
 - **Autocomplete** in composer (To/Cc/Bcc)
-- **Bulk operations** — multi-select, delete, group add, export
+- **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…)
+- **Visual rule builder** - conditions (From, To, Subject, Size, Body…) and actions (Move, Forward, Star, Discard…) with an expanded visual view
+- **External rule preservation** - rules authored in other clients are displayed and preserved
 - **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.)
+- **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
+- **Upload and download** files with progress tracking, folder upload, and streamed WebDAV PUT (no in-memory buffering)
+- **Dynamic upload limits** - respects the server-configured maximum upload size
 - **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
+- **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
+- **Bulk operations** - multi-select, delete, move, download
 
 ### Security & Privacy
 
-- **External content blocked** by default — trusted senders list for auto-load
+- **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
+- **S/MIME** - manage certificates, sign outgoing mail, encrypt to recipients, decrypt messages, and verify signatures; self-signed certificate detection; legacy 3DES / PBE support; per-account key isolation
 - **SPF/DKIM/DMARC** status indicators
-- **OAuth2/OIDC with PKCE** for SSO (Keycloak, Authentik, or built-in), with OAuth-only mode and non-interactive SSO for embedded/iframe deployments
+- **OAuth2/OIDC with PKCE** for SSO (Keycloak, Authentik, or built-in), with OAuth-only mode, OAuth app passwords, configurable scopes, and non-interactive SSO for embedded/iframe deployments
 - **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
+- **Account security panel** - manage passwords and 2FA via Stalwart admin API
+- **"Remember me"** - AES-256-GCM encrypted httpOnly cookie (opt-in)
+- **Security headers** - enforced CSP with per-request nonce, X-Frame-Options, Referrer-Policy; SSRF redirect validation; PDF iframe sandbox; IP spoofing prevention
+- **Plugin hardening** - dangerous-pattern detection, admin approval required, secure HTTP proxy API (no auth-header exposure)
 - **Newsletter unsubscribe** (RFC 2369)
 
 ### Interface
 
-- **Three-pane layout** — sidebar, email list, viewer with resizable columns
+- **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
+- **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
-- **Interactive guided tour** — onboarding walkthrough for new users
+- **Interactive guided tour** - onboarding walkthrough for new users
 - **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)
+- **Sidebar apps** - pin custom tools to the navigation rail with drag-and-drop reordering, mobile visibility toggles, and inline or new-tab launch modes
+- **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
+- **Version badge** in settings
+- **Focused mode** with proper viewport bounds
+- **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
+14 languages: English · Français · 日本語 · Español · Italiano · Deutsch · Nederlands · Português · Русский · 한국어 · Polski · Latviešu · 简体中文 · Українська
 
-Automatic browser detection with persistent preference.
+Automatic browser detection with persistent preference. Configurable locale URL prefix via `NEXT_PUBLIC_LOCALE_PREFIX`.
 
 ### 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
+- **Automatic identity synchronization** and refresh to keep the identity manager aligned with server-side changes
+- **Sub-addressing** - `user+tag@domain.com` with contextual tag suggestions
 - **Identity badges** in viewer and email list
 
+### Multi-Account
+
+- **Up to 5 simultaneous accounts** with instant switching and per-account session persistence
+- **Account switcher** with connection status, default account selection, and per-account logout
+- **Per-account settings** - encrypted settings storage with server-side sync
+- **Shared folders** across accounts
+- **Custom JMAP server endpoints** - optionally let users connect to any JMAP server from the login form (`ALLOW_CUSTOM_JMAP_ENDPOINT`)
+
+### Admin & Extensibility
+
+- **Stalwart admin dashboard** - sidebar access with reorganized dashboard and dedicated policy sections
+- **Plugin system** - schema-driven admin config UI, render and intercept hooks, `onAvatarResolve` and i18n APIs, calendar event action slots, forced enable/disable and managed policy enforcement
+- **Themes** - upload, enforce, and manage admin-controlled themes with ZIP bundles
+- **Extension marketplace** - browse and install plugins/themes from a configurable directory (`EXTENSION_DIRECTORY_URL`)
+- **Bundled plugins** - Jitsi Meet calendar integration
+
 ### Operations
 
-- **Automatic update check** — server logs when a newer release is available
-- **Demo mode** — try the webmail with fixture data for emails, calendars, contacts, files, filters, identities, and mailboxes — no mail server required
+- **Progressive Web App (PWA)** - installable with service worker, install prompt, and dynamic manifest (app name, description, icons, theme and background colors)
+- **Automatic update check** - server logs when a newer release is available
+- **Logging categories** with `text` or `json` formats for log aggregation
+- **Docker images** - release (`main`) and development (`dev`) channels on GHCR
+- **Demo mode** - try the webmail with fixture data for emails, calendars, contacts, files, filters, identities, and mailboxes - no mail server required
 
 ---
 
@@ -217,7 +255,7 @@ Or with Docker Compose:
 
 ```bash
 cp .env.example .env.local
-# Edit .env.local — set JMAP_SERVER_URL
+# Edit .env.local - set JMAP_SERVER_URL
 docker compose up -d
 ```
 
@@ -228,7 +266,7 @@ git clone https://github.com/bulwarkmail/webmail.git
 cd webmail
 npm install
 cp .env.example .env.local
-# Edit .env.local — set JMAP_SERVER_URL
+# Edit .env.local - set JMAP_SERVER_URL
 npm run build && npm start
 ```
 
@@ -252,7 +290,7 @@ JMAP_SERVER_URL=https://mail.example.com
 APP_NAME=My Webmail
 ```
 
-All variables are **runtime** — Docker deployments can be configured without rebuilding.
+All variables are **runtime** - Docker deployments can be configured without rebuilding.
 
 <details>
 <summary>Server Listen Address</summary>
@@ -271,6 +309,7 @@ PORT=3000            # Default listen port
 OAUTH_ENABLED=true
 OAUTH_CLIENT_ID=webmail
 OAUTH_CLIENT_SECRET=              # optional, for confidential clients
+OAUTH_CLIENT_SECRET_FILE=         # Path to a file containing the client secret
 OAUTH_ISSUER_URL=                 # optional, for external IdPs (Keycloak, Authentik)
 ```
 
@@ -279,13 +318,79 @@ Endpoints are auto-discovered via `.well-known/oauth-authorization-server` or `.
 </details>
 
 <details>
-<summary>Remember Me</summary>
+<summary>Remember Me & Settings Sync</summary>
 
 ```env
 SESSION_SECRET=your-secret-key       # Generate with: openssl rand -base64 32
+SESSION_SECRET_FILE=/session-secret  # Path to a file containing the session secret
+
+SETTINGS_SYNC_ENABLED=true           # Persist encrypted user settings on the server
+SETTINGS_DATA_DIR=./data/settings    # Storage location (mount a volume in Docker)
 ```
 
 Credentials encrypted with AES-256-GCM, 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 login
+```
+
+Lets users connect to any JMAP-compatible server. External servers must CORS-allow the webmail origin.
+
+</details>
+
+<details>
+<summary>Branding & PWA</summary>
+
+```env
+APP_NAME=My Webmail
+APP_SHORT_NAME=Webmail               # Home-screen label on mobile
+APP_DESCRIPTION=Your personal mail   # Shown during PWA install
+
+FAVICON_URL=/branding/favicon.svg
+PWA_ICON_URL=/branding/icon.svg      # Falls back to FAVICON_URL
+PWA_THEME_COLOR=#3b82f6              # Browser chrome color
+PWA_BACKGROUND_COLOR=#ffffff         # PWA splash background
+
+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.
+STALWART_API_URL=https://admin.example.com  # If reverse proxy doesn't forward /api/*
+
+LOG_FORMAT=text                      # "text" or "json"
+LOG_LEVEL=info                       # "error", "warn", "info", "debug"
+```
 
 </details>
 
@@ -319,7 +424,7 @@ 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 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.
 
 ## Contributing
 

VERSION

@@ -1 +1 @@
-1.4.9
+1.4.14

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

@@ -35,7 +35,7 @@ function OAuthCallbackInner() {
     const savedState = sessionStorage.getItem("oauth_state");
 
     if (savedState) {
-      // Classic flow — sessionStorage has the PKCE state (same-tab OAuth)
+      // Classic flow - sessionStorage has the PKCE state (same-tab OAuth)
       if (!state || state !== savedState) {
         setError("invalid_state");
         return;
@@ -76,7 +76,7 @@ function OAuthCallbackInner() {
           setError("token_exchange_failed");
         });
     } else if (state) {
-      // Server-side SSO flow — state was stored in encrypted httpOnly cookie
+      // Server-side SSO flow - state was stored in encrypted httpOnly cookie
       const ssoPrefix = getPathPrefix(params.locale as string);
       loginWithServerSso(code, state)
         .then((success) => {

app/[locale]/calendar/page.tsx

@@ -39,10 +39,13 @@ import { InlineAppView } from "@/components/layout/inline-app-view";
 import { useSidebarApps } from "@/hooks/use-sidebar-apps";
 import { ResizeHandle } from "@/components/layout/resize-handle";
 import { sanitizeOutgoingCalendarEventData } from "@/lib/calendar-event-normalization";
+import { getEventStartDate } from "@/lib/calendar-utils";
 import { useTaskStore } from "@/stores/task-store";
+import { useContactStore } from "@/stores/contact-store";
 import { cn } from "@/lib/utils";
 import type { CalendarEvent, CalendarParticipant } from "@/lib/jmap/types";
 import { getUserParticipantId } from "@/lib/calendar-participants";
+import { generateBirthdayEvents, createBirthdayCalendar, BIRTHDAY_CALENDAR_ID } from "@/lib/birthday-calendar";
 import { debug } from "@/lib/debug";
 
 type PendingScopeAction =
@@ -66,12 +69,13 @@ export default function CalendarPage() {
     isLoading, isLoadingEvents, supportsCalendar, error,
     fetchCalendars, fetchEvents, createEvent, updateEvent, deleteEvent, rsvpEvent,
     setSelectedDate, setViewMode, toggleCalendarVisibility, updateCalendar,
-    refreshAllSubscriptions,
+    refreshAllSubscriptions, icalSubscriptions,
   } = useCalendarStore();
-  const { firstDayOfWeek, timeFormat, showWeekNumbers, enableCalendarTasks, showTasksOnCalendar } = useSettingsStore();
+  const { firstDayOfWeek, timeFormat, showWeekNumbers, enableCalendarTasks, showTasksOnCalendar, calendarHoverPreview, showBirthdayCalendar, birthdayCalendarColor, updateSetting } = useSettingsStore();
   const taskStore = useTaskStore();
   const fetchTasksFn = useTaskStore(state => state.fetchTasks);
   const { identities } = useIdentityStore();
+  const contacts = useContactStore((s) => s.contacts);
   const normalizedViewMode = isCalendarViewMode(viewMode) ? viewMode : "month";
 
   const currentUserEmails = useMemo(() =>
@@ -82,6 +86,7 @@ export default function CalendarPage() {
   const [showEventModal, setShowEventModal] = useState(false);
   const [showImportModal, setShowImportModal] = useState(false);
   const [showSubscriptionModal, setShowSubscriptionModal] = useState(false);
+  const [editingSubscription, setEditingSubscription] = useState<string | null>(null);
   const [editEvent, setEditEvent] = useState<CalendarEvent | null>(null);
   const [defaultModalDate, setDefaultModalDate] = useState<Date | undefined>();
   const [defaultModalEndDate, setDefaultModalEndDate] = useState<Date | undefined>();
@@ -107,6 +112,16 @@ export default function CalendarPage() {
   // Swipe navigation ref (handlers defined after navigatePrev/navigateNext)
   const touchStartRef = useRef<{ x: number; y: number; time: number } | null>(null);
 
+  // Keep detailEvent in sync with store events (e.g. after update + refetch)
+  useEffect(() => {
+    if (detailEvent) {
+      const updated = events.find(e => e.id === detailEvent.id);
+      if (updated && updated !== detailEvent) {
+        setDetailEvent(updated);
+      }
+    }
+  }, [events, detailEvent]);
+
   // Check auth on mount
   useEffect(() => {
     checkAuth().finally(() => {
@@ -146,6 +161,13 @@ export default function CalendarPage() {
     return () => clearInterval(interval);
   }, [client, refreshAllSubscriptions]);
 
+  // Auto-add birthday calendar to selected IDs when enabled
+  useEffect(() => {
+    if (showBirthdayCalendar && !selectedCalendarIds.includes(BIRTHDAY_CALENDAR_ID)) {
+      toggleCalendarVisibility(BIRTHDAY_CALENDAR_ID);
+    }
+  }, [showBirthdayCalendar]); // eslint-disable-line react-hooks/exhaustive-deps
+
   const dateRange = useMemo(() => {
     const d = selectedDate;
     switch (normalizedViewMode) {
@@ -337,18 +359,28 @@ export default function CalendarPage() {
 
   const handleHoverEvent = useCallback((event: CalendarEvent, anchorRect: DOMRect) => {
     if (isMobile) return;
+    if (calendarHoverPreview === 'off') return;
     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;
+    if (calendarHoverPreview === 'delay-500ms' || calendarHoverPreview === 'delay-1s' || calendarHoverPreview === 'delay-2s') {
+      const ms = calendarHoverPreview === 'delay-500ms' ? 500 : calendarHoverPreview === 'delay-1s' ? 1000 : 2000;
+      hoverTimerRef.current = setTimeout(() => {
         setDetailEvent(event);
         setDetailAnchorRect(anchorRect);
-  }, [isMobile, showEventModal, editEvent]);
+      }, ms);
+    } else {
+      setDetailEvent(event);
+      setDetailAnchorRect(anchorRect);
+    }
+  }, [isMobile, calendarHoverPreview, showEventModal, editEvent]);
 
   const handleHoverLeave = useCallback(() => {
+    if (hoverTimerRef.current) { clearTimeout(hoverTimerRef.current); hoverTimerRef.current = null; }
     hoverTimerRef.current = setTimeout(() => {
       setDetailEvent(null);
       setDetailAnchorRect(null);
-    }, 200);
+    }, 300);
   }, []);
 
   const handleEditFromDetail = useCallback(() => {
@@ -385,12 +417,16 @@ export default function CalendarPage() {
     }
   }, [client, fetchEvents]);
 
-  const focusCalendarOnEvent = useCallback((event: Pick<CalendarEvent, "start">) => {
+  const focusCalendarOnEvent = useCallback((event: Pick<Partial<CalendarEvent>, "start" | "utcStart" | "showWithoutTime">) => {
     if (!event.start) {
       return;
     }
 
-    const eventDate = parseISO(event.start);
+    const eventDate = getEventStartDate({
+      start: event.start,
+      utcStart: event.utcStart ?? null,
+      showWithoutTime: event.showWithoutTime ?? false,
+    });
     if (Number.isNaN(eventDate.getTime())) {
       return;
     }
@@ -727,14 +763,31 @@ export default function CalendarPage() {
     return () => window.removeEventListener("keydown", handleKey);
   }, [navigatePrev, navigateNext, goToToday, setViewMode, openCreateModal, showEventModal, detailEvent, enableCalendarTasks]);
 
-  const visibleEvents = useMemo(() =>
-    events.filter((e) => {
+  const birthdayEvents = useMemo(() => {
+    if (!showBirthdayCalendar || !dateRange) return [];
+    return generateBirthdayEvents(contacts, dateRange.start, dateRange.end);
+  }, [showBirthdayCalendar, contacts, dateRange]);
+
+  const birthdayCalendarName = (() => {
+    try { return t('birthday_calendar'); } catch { return 'Birthdays'; }
+  })();
+
+  const allCalendars = useMemo(() => {
+    if (!showBirthdayCalendar) return calendars;
+    return [...calendars, createBirthdayCalendar(birthdayCalendarName, birthdayCalendarColor)];
+  }, [calendars, showBirthdayCalendar, birthdayCalendarName, birthdayCalendarColor]);
+
+  const visibleEvents = useMemo(() => {
+    const filtered = events.filter((e) => {
       if (!e.start || !e.calendarIds) return false;
       const calIds = Object.keys(e.calendarIds);
       return calIds.some((id) => selectedCalendarIds.includes(id));
-    }),
-    [events, selectedCalendarIds]
-  );
+    });
+    if (showBirthdayCalendar && selectedCalendarIds.includes(BIRTHDAY_CALENDAR_ID)) {
+      return [...filtered, ...birthdayEvents];
+    }
+    return filtered;
+  }, [events, selectedCalendarIds, showBirthdayCalendar, birthdayEvents]);
 
   useEffect(() => {
     const hiddenEvents = events.filter((event) => {
@@ -749,7 +802,7 @@ export default function CalendarPage() {
       return;
     }
 
-    debug.log('Calendar visibility summary', {
+    debug.log('calendar', 'Calendar visibility summary', {
       totalEvents: events.length,
       visibleEvents: visibleEvents.length,
       hiddenEvents: hiddenEvents.length,
@@ -783,7 +836,7 @@ export default function CalendarPage() {
             <CalendarMonthView
               selectedDate={selectedDate}
               events={visibleEvents}
-              calendars={calendars}
+              calendars={allCalendars}
               onSelectDate={handleSelectDate}
               onSelectEvent={handleSelectEvent}
               onHoverEvent={handleHoverEvent}
@@ -799,7 +852,7 @@ export default function CalendarPage() {
             <CalendarWeekView
               selectedDate={selectedDate}
               events={visibleEvents}
-              calendars={calendars}
+              calendars={allCalendars}
               onSelectDate={handleSelectDate}
               onSelectEvent={handleSelectEvent}
               onHoverEvent={handleHoverEvent}
@@ -818,7 +871,7 @@ export default function CalendarPage() {
             <CalendarDayView
               selectedDate={selectedDate}
               events={visibleEvents}
-              calendars={calendars}
+              calendars={allCalendars}
               onSelectEvent={handleSelectEvent}
               onHoverEvent={handleHoverEvent}
               onHoverLeave={handleHoverLeave}
@@ -835,7 +888,7 @@ export default function CalendarPage() {
             <CalendarAgendaView
               selectedDate={selectedDate}
               events={visibleEvents}
-              calendars={calendars}
+              calendars={allCalendars}
               onSelectEvent={handleSelectEvent}
               onHoverEvent={handleHoverEvent}
               onHoverLeave={handleHoverLeave}
@@ -873,7 +926,7 @@ export default function CalendarPage() {
     })();
 
     return (
-      <div className="relative flex-1 flex flex-col overflow-hidden">
+      <div className="relative flex min-h-0 flex-1 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">
@@ -926,13 +979,18 @@ export default function CalendarPage() {
               showWeekNumbers={showWeekNumbers}
             />
             <CalendarSidebarPanel
-              calendars={calendars}
+              calendars={allCalendars}
               selectedCalendarIds={selectedCalendarIds}
               onToggleVisibility={toggleCalendarVisibility}
               onColorChange={client ? (calendarId, color) => {
+                if (calendarId === BIRTHDAY_CALENDAR_ID) {
+                  updateSetting('birthdayCalendarColor', color);
+                  return;
+                }
                 updateCalendar(client, calendarId, { color });
               } : undefined}
               onSubscribe={() => setShowSubscriptionModal(true)}
+              onEditSubscription={(subId) => setEditingSubscription(subId)}
               client={client}
             />
           </div>
@@ -1099,6 +1157,18 @@ export default function CalendarPage() {
         />
       )}
 
+      {editingSubscription && client && (() => {
+        const sub = icalSubscriptions.find(s => s.id === editingSubscription);
+        if (!sub) return null;
+        return (
+          <ICalSubscriptionModal
+            client={client}
+            editSubscription={sub}
+            onClose={() => setEditingSubscription(null)}
+          />
+        );
+      })()}
+
       <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
       <RecurrenceScopeDialog
         isOpen={!!pendingScopeAction}

app/[locale]/contacts/page.tsx

@@ -13,12 +13,13 @@ 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 { useContactStore, getContactDisplayName } from "@/stores/contact-store";
 import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
 import { useEmailStore } from "@/stores/email-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";
@@ -72,12 +73,16 @@ export default function ContactsPage() {
     bulkDeleteContacts,
     bulkAddToGroup,
     moveContactToAddressBook,
+    renameAddressBook,
+    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 [renamingKeyword, setRenamingKeyword] = useState<string | null>(null);
   const [selectedGroupId, setSelectedGroupId] = useState<string | null>(null);
   const hasFetched = useRef(false);
   const { dialogProps: confirmDialogProps, confirm: confirmDialog } = useConfirmDialog();
@@ -274,7 +279,7 @@ export default function ContactsPage() {
       toast.success(t("toast.created"));
     } else {
       const localContact: ContactCard = {
-        id: `local-${crypto.randomUUID()}`,
+        id: `local-${generateUUID()}`,
         addressBookIds: {},
         ...data,
       };
@@ -631,6 +636,8 @@ export default function ContactsPage() {
                       onDeleteGroup={handleDeleteGroupFromSidebar}
                       onDropContacts={handleDropContacts}
                       onDropContactsToCategory={handleDropContactsToCategory}
+                      onRenameAddressBook={client ? (book) => setRenamingAddressBook(book) : undefined}
+                      onRenameKeyword={(kw) => setRenamingKeyword(kw)}
                     />
                   </div>
                   <ResizeHandle
@@ -725,6 +732,46 @@ 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">

app/[locale]/files/page.tsx

@@ -17,15 +17,18 @@ import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
 import { InlineAppView } from "@/components/layout/inline-app-view";
 import { useSidebarApps } from "@/hooks/use-sidebar-apps";
 import { useIsMobile } from "@/hooks/use-media-query";
+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 { 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 { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
   const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
@@ -392,12 +395,25 @@ 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}
@@ -442,6 +458,7 @@ export default function FilesPage() {
                   onToggleDetails={handleToggleDetails}
                   detailResource={detailResource}
                 />
+                </div>
               )}
             </div>
           </div>

app/[locale]/login/page.tsx

@@ -10,13 +10,15 @@ import { useAuthStore } from "@/stores/auth-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 { AlertCircle, Loader2, X, Info, Eye, EyeOff, LogIn, Sun, Moon, Monitor, Check, Shield, Play } 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";
 
-const APP_VERSION = "1.4.9";
+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" },
@@ -24,6 +26,41 @@ const THEME_OPTIONS = [
   { value: "system" as const, icon: Monitor, label: "System" },
 ];
 
+function VersionBadge() {
+  const [copied, setCopied] = useState(false);
+  const versionInfo = `Version: ${APP_VERSION}\nBuild: ${GIT_COMMIT}`;
+
+  const handleCopy = () => {
+    navigator.clipboard.writeText(versionInfo).then(() => {
+      setCopied(true);
+      setTimeout(() => setCopied(false), 2000);
+    });
+  };
+
+  return (
+    <div className="relative inline-flex justify-center">
+      <p className="peer text-center text-xs text-muted-foreground/40 cursor-default">
+        v{APP_VERSION}
+      </p>
+      <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>
+          </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>
+  );
+}
+
 export default function LoginPage() {
   const router = useRouter();
   const t = useTranslations("login");
@@ -32,13 +69,14 @@ export default function LoginPage() {
   const isAddAccountMode = searchParams.get("mode") === "add-account";
   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, demoMode, loginLogoLightUrl, loginLogoDarkUrl, loginCompanyName, loginImprintUrl, loginPrivacyPolicyUrl, loginWebsiteUrl, isLoading: configLoading, error: configError, autoSsoEnabled, embeddedMode: _embeddedMode } = useConfig();
+  const { appName, jmapServerUrl: serverUrl, oauthEnabled, oauthOnly, oauthClientId, oauthIssuerUrl, rememberMeEnabled, devMode, demoMode, loginLogoLightUrl, loginLogoDarkUrl, loginCompanyName, loginImprintUrl, loginPrivacyPolicyUrl, loginWebsiteUrl, isLoading: configLoading, error: configError, autoSsoEnabled, embeddedMode: _embeddedMode, allowCustomJmapEndpoint } = useConfig();
   const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
 
   const [formData, setFormData] = useState({
     username: "",
     password: "",
   });
+  const [jmapEndpoint, setJmapEndpoint] = useState("");
   const [totpCode, setTotpCode] = useState("");
   const [showTotpField, setShowTotpField] = useState(false);
   const [rememberMe, setRememberMe] = useState(false);
@@ -73,6 +111,12 @@ export default function LoginPage() {
     }
   }, [appName, serverUrl]);
 
+  useEffect(() => {
+    if (serverUrl && !jmapEndpoint) {
+      setJmapEndpoint(serverUrl);
+    }
+  }, [serverUrl, jmapEndpoint]);
+
   useEffect(() => {
     try {
       if (sessionStorage.getItem('session_expired') === 'true') {
@@ -91,6 +135,14 @@ 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");
@@ -180,8 +232,9 @@ export default function LoginPage() {
   const startServerSideSso = useCallback(async () => {
     setOauthLoading(true);
     try {
-      const redirectUri = `${window.location.origin}/${params.locale}/auth/callback`;
-      const res = await fetch('/api/auth/sso/start', {
+      const prefix = getPathPrefix(params.locale as string);
+      const redirectUri = `${window.location.origin}${prefix}/${params.locale}/auth/callback`;
+      const res = await apiFetch('/api/auth/sso/start', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         credentials: 'include',
@@ -202,7 +255,7 @@ export default function LoginPage() {
         try {
           window.top!.location.href = authorize_url;
         } catch {
-          // Cross-origin restriction — fall back to current frame
+          // Cross-origin restriction - fall back to current frame
           window.location.href = authorize_url;
         }
       } else {
@@ -264,7 +317,7 @@ export default function LoginPage() {
     );
   }
 
-  if (!serverUrl && !demoMode) {
+  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">
@@ -362,7 +415,7 @@ export default function LoginPage() {
 
     sessionStorage.setItem("oauth_code_verifier", verifier);
     sessionStorage.setItem("oauth_state", state);
-    sessionStorage.setItem("oauth_server_url", serverUrl!);
+    sessionStorage.setItem("oauth_server_url", allowCustomJmapEndpoint ? jmapEndpoint : serverUrl!);
     if (isAddAccountMode) {
       sessionStorage.setItem("oauth_add_account_mode", "true");
     }
@@ -382,8 +435,9 @@ export default function LoginPage() {
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
 
+    const effectiveServerUrl = allowCustomJmapEndpoint ? jmapEndpoint : serverUrl;
     const success = await login(
-      serverUrl,
+      effectiveServerUrl,
       formData.username,
       formData.password,
       totpCode || undefined,
@@ -563,9 +617,7 @@ export default function LoginPage() {
                 )}
               </div>
             )}
-            <p className="text-center text-xs text-muted-foreground/40">
-              v{APP_VERSION}
-            </p>
+            <VersionBadge />
           </div>
         </div>
       </div>
@@ -707,7 +759,7 @@ 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 ? (
@@ -749,6 +801,27 @@ export default function LoginPage() {
               /* Login Form */
               <form onSubmit={handleSubmit} className="space-y-5">
                 <fieldset disabled={isLoading} className="space-y-4">
+                  {/* JMAP Endpoint field (when custom endpoints are allowed) */}
+                  {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">
@@ -861,7 +934,10 @@ 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")}
@@ -1035,9 +1111,7 @@ export default function LoginPage() {
               )}
             </div>
           )}
-          <p className="text-center text-xs text-muted-foreground/40">
-            v{APP_VERSION}
-          </p>
+          <VersionBadge />
         </div>
       </div>
     </div>

app/[locale]/page.tsx

@@ -9,16 +9,20 @@ import { EmailComposer } from "@/components/email/email-composer";
 import type { ComposerDraftData } from "@/components/email/email-composer";
 import { ThreadConversationView } from "@/components/email/thread-conversation-view";
 import { MobileHeader, MobileViewerHeader } from "@/components/layout/mobile-header";
-import { ThreadGroup, Email } from "@/lib/jmap/types";
+import { ThreadGroup, Email, isUnifiedMailboxId, UNIFIED_ROLE_BY_ID } from "@/lib/jmap/types";
+import { useAccountStore } from "@/stores/account-store";
+import type { UnifiedAccountClient } from "@/lib/unified-mailbox";
 import { KeyboardShortcutsModal } from "@/components/keyboard-shortcuts-modal";
 import { useEmailStore } from "@/stores/email-store";
 import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
 import { useSettingsStore } from "@/stores/settings-store";
+import { useContactStore } from "@/stores/contact-store";
 import { useIdentityStore } from "@/stores/identity-store";
 import { useUIStore } from "@/stores/ui-store";
 import { useDeviceDetection } from "@/hooks/use-media-query";
 import { useKeyboardShortcuts } from "@/hooks/use-keyboard-shortcuts";
 import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
+import { useBrowserNavigation, type NavSnapshot } from "@/hooks/use-browser-navigation";
 import { debug } from "@/lib/debug";
 import { playNotificationSound } from "@/lib/notification-sound";
 import { cn } from "@/lib/utils";
@@ -30,6 +34,7 @@ import {
   ComposerErrorFallback,
 } from "@/components/error";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
+import { TotpReauthDialog } from "@/components/totp-reauth-dialog";
 import { DragDropProvider } from "@/contexts/drag-drop-context";
 import { isFilterEmpty, activeFilterCount } from "@/lib/jmap/search-utils";
 import { WelcomeBanner } from "@/components/ui/welcome-banner";
@@ -37,6 +42,7 @@ 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 { useIdentitySync } from "@/hooks/use-identity-sync";
 import { Input } from "@/components/ui/input";
 import { FilePreviewModal } from "@/components/files/file-preview-modal";
 import { isFilePreviewable } from "@/lib/file-preview";
@@ -53,10 +59,12 @@ export default function Home() {
   const t = useTranslations();
   const tCommon = useTranslations('common');
   const { appName } = useConfig();
+  const mailLayout = useSettingsStore((state) => state.mailLayout);
   const [showComposer, setShowComposer] = useState(false);
   const [composerMode, setComposerMode] = useState<'compose' | 'reply' | 'replyAll' | 'forward'>('compose');
   const [composerDraftText, setComposerDraftText] = useState("");
   const [pendingDraft, setPendingDraft] = useState<ComposerDraftData | null>(null);
+  const [composerSessionId, setComposerSessionId] = useState(0);
   const { dialogProps: confirmDialogProps, confirm: confirmDialog } = useConfirmDialog();
   const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
   const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
@@ -74,6 +82,16 @@ export default function Home() {
   const markAsReadTimeoutRef = useRef<NodeJS.Timeout | null>(null);
   const { isAuthenticated, client, logout, checkAuth, isLoading: authLoading, connectionLost, isRateLimited, rateLimitUntil } = useAuthStore();
   const { identities } = useIdentityStore();
+  useIdentitySync();
+  const trustedSendersAddressBook = useSettingsStore((state) => state.trustedSendersAddressBook);
+  const { loadTrustedSendersBook, trustedSendersLoaded } = useContactStore();
+
+  // Load trusted senders address book when feature is enabled
+  useEffect(() => {
+    if (trustedSendersAddressBook && client && !trustedSendersLoaded) {
+      loadTrustedSendersBook(client);
+    }
+  }, [trustedSendersAddressBook, client, trustedSendersLoaded, loadTrustedSendersBook]);
 
   useEffect(() => {
     if (!isRateLimited || !rateLimitUntil) {
@@ -139,8 +157,150 @@ export default function Home() {
     hasMoreEmails,
     fetchTagCounts,
     fetchEmailContent,
+    isUnifiedView,
+    fetchUnifiedEmails: fetchUnifiedEmailsAction,
+    refreshUnifiedCounts,
+    exitUnifiedView,
   } = useEmailStore();
 
+  const enableUnifiedMailbox = useSettingsStore((s) => s.enableUnifiedMailbox);
+  const accounts = useAccountStore((s) => s.accounts);
+  const connectedAccountsSignature = useMemo(
+    () => accounts.filter((a) => a.isConnected).map((a) => a.id).sort().join(","),
+    [accounts],
+  );
+
+  const buildUnifiedAccounts = useCallback((): UnifiedAccountClient[] => {
+    const connected = useAccountStore.getState().accounts.filter((a) => a.isConnected);
+    const clients = useAuthStore.getState().getAllConnectedClients();
+    const result: UnifiedAccountClient[] = [];
+    for (const account of connected) {
+      const accountClient = clients.get(account.id);
+      if (!accountClient) continue;
+      result.push({
+        accountId: account.id,
+        accountLabel: account.label || account.email,
+        client: accountClient,
+        mailboxes: [],
+      });
+    }
+    return result;
+  }, []);
+
+  const populateUnifiedAccountMailboxes = useCallback(
+    async (list: UnifiedAccountClient[]): Promise<UnifiedAccountClient[]> => {
+      const populated = await Promise.all(
+        list.map(async (entry) => {
+          try {
+            const mailboxes = await entry.client.getMailboxes();
+            return { ...entry, mailboxes };
+          } catch (err) {
+            debug.error('Failed to load mailboxes for unified account', entry.accountId, err);
+            return entry;
+          }
+        }),
+      );
+      return populated;
+    },
+    [],
+  );
+
+  // Browser back / forward integration. The restore handler reads the
+  // latest values from a ref so we don't have to recreate the callback on
+  // every render (and so the popstate listener is never stale).
+  const navRestoreStateRef = useRef({
+    client,
+    emails,
+    mailboxes,
+    selectedMailbox,
+    selectedEmailId: selectedEmail?.id ?? null,
+    conversationThreadId: null as string | null,
+  });
+  navRestoreStateRef.current.client = client;
+  navRestoreStateRef.current.emails = emails;
+  navRestoreStateRef.current.mailboxes = mailboxes;
+  navRestoreStateRef.current.selectedMailbox = selectedMailbox;
+  navRestoreStateRef.current.selectedEmailId = selectedEmail?.id ?? null;
+  navRestoreStateRef.current.conversationThreadId = conversationThread?.threadId ?? null;
+
+  const handleNavRestore = useCallback(async (state: NavSnapshot) => {
+    const ctx = navRestoreStateRef.current;
+
+    // Restore sidebar overlay state.
+    setSidebarOpen(state.sidebarOpen);
+
+    // Restore composer visibility.
+    if (!state.composerOpen) {
+      setShowComposer(false);
+    }
+
+    // Derive the mobile view from the saved snapshot. The view is a
+    // function of which content the user is looking at: an email, a
+    // thread, the composer, or the bare list.
+    const derivedView: "list" | "viewer" =
+      state.emailId || state.threadId || state.composerOpen ? "viewer" : "list";
+    setActiveView(derivedView);
+
+    // Restore mailbox selection. selectMailbox clears the current email,
+    // which is fine because we re-apply the saved email below.
+    if (state.mailboxId && state.mailboxId !== ctx.selectedMailbox) {
+      selectMailbox(state.mailboxId);
+      if (ctx.client) {
+        try {
+          await fetchEmails(ctx.client, state.mailboxId);
+        } catch (error) {
+          debug.error('Failed to fetch emails on history restore:', error);
+        }
+      }
+    }
+
+    // Restore conversation thread (mobile only). We can clear it directly,
+    // but reopening requires the thread group; if the user pressed forward
+    // to return to a thread, we silently skip - back navigation always works.
+    if ((state.threadId ?? null) !== ctx.conversationThreadId) {
+      if (state.threadId === null) {
+        setConversationThread(null);
+        setConversationEmails([]);
+      }
+    }
+
+    // Restore email selection.
+    if (state.emailId !== ctx.selectedEmailId) {
+      if (state.emailId === null) {
+        selectEmail(null);
+      } else {
+        // Try the in-memory list first; the existing useEffect will fetch
+        // body content if it's missing.
+        const found = ctx.emails.find(e => e.id === state.emailId);
+        if (found) {
+          selectEmail(found);
+        } else if (ctx.client) {
+          // Email isn't in the current list (e.g. mailbox just changed).
+          // Fetch it directly.
+          try {
+            const mailbox = ctx.mailboxes.find(mb => mb.id === state.mailboxId);
+            const accountId = mailbox?.isShared ? mailbox.accountId : undefined;
+            const fullEmail = await ctx.client.getEmail(state.emailId, accountId);
+            if (fullEmail) selectEmail(fullEmail);
+          } catch (error) {
+            debug.error('Failed to fetch email on history restore:', error);
+          }
+        }
+      }
+    }
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
+  useBrowserNavigation({
+    mailboxId: selectedMailbox,
+    emailId: selectedEmail?.id ?? null,
+    threadId: conversationThread?.threadId ?? null,
+    composerOpen: showComposer,
+    sidebarOpen,
+    onRestore: handleNavRestore,
+    enabled: isAuthenticated && mailboxes.length > 0,
+  });
+
   // Keyboard shortcuts handlers
   const keyboardHandlers = useMemo(() => ({
     onNextEmail: () => {
@@ -350,13 +510,13 @@ export default function Home() {
 
             if (pushEnabled) {
               setPushConnected(true);
-              debug.log('[Push] Push notifications successfully enabled');
+              debug.log('push', '[Push] Push notifications successfully enabled');
             } else {
-              debug.log('[Push] Push notifications not available on this server');
+              debug.log('push', '[Push] Push notifications not available on this server');
             }
           } catch (error) {
             // Push notifications are optional - don't break the app if they fail
-            debug.log('[Push] Failed to setup push notifications:', error);
+            debug.log('push', '[Push] Failed to setup push notifications:', error);
           }
         } catch (error) {
           console.error('Error loading email data:', error);
@@ -373,13 +533,30 @@ export default function Home() {
     };
   }, [isAuthenticated, client, mailboxes.length, fetchMailboxes, fetchEmails, fetchQuota, fetchTagCounts, handleStateChange, setPushConnected]);
 
+  // Keep unified mailbox counts in sync when the feature is enabled and more
+  // than one account is connected. Runs whenever the set of connected accounts
+  // or the primary account's mailboxes change (a proxy for "something worth
+  // recounting happened").
+  useEffect(() => {
+    if (!enableUnifiedMailbox || !isAuthenticated || !client) return;
+    const built = buildUnifiedAccounts();
+    if (built.length < 2) return;
+    populateUnifiedAccountMailboxes(built).then((populated) => {
+      refreshUnifiedCounts(populated);
+    });
+  }, [enableUnifiedMailbox, isAuthenticated, client, mailboxes, connectedAccountsSignature, buildUnifiedAccounts, populateUnifiedAccountMailboxes, refreshUnifiedCounts]);
+
   // Auto-fetch full email content when an email is auto-selected (e.g. after delete/archive)
   useEffect(() => {
     if (!selectedEmail || !client) return;
     // If the email lacks bodyValues, it was auto-selected from the list and needs full content
     if (!selectedEmail.bodyValues) {
+      const perAccountClient = isUnifiedView && selectedEmail.accountId
+        ? useAuthStore.getState().getClientForAccount(selectedEmail.accountId)
+        : undefined;
+      const fetchClient = perAccountClient ?? client;
       setLoadingEmail(true);
-      fetchEmailContent(client, selectedEmail.id).finally(() => {
+      fetchEmailContent(fetchClient, selectedEmail.id).finally(() => {
         setLoadingEmail(false);
       });
     }
@@ -390,7 +567,7 @@ export default function Home() {
   useEffect(() => {
     // Clear any existing timeout when email changes
     if (markAsReadTimeoutRef.current) {
-      debug.log('[Mark as Read] Clearing previous timeout');
+      debug.log('email', '[Mark as Read] Clearing previous timeout');
       clearTimeout(markAsReadTimeoutRef.current);
       markAsReadTimeoutRef.current = null;
     }
@@ -402,20 +579,20 @@ export default function Home() {
 
     // Get current setting value
     const markAsReadDelay = useSettingsStore.getState().markAsReadDelay;
-    debug.log('[Mark as Read] Delay setting:', markAsReadDelay, 'ms for email:', selectedEmail.id);
+    debug.log('email', '[Mark as Read] Delay setting:', markAsReadDelay, 'ms for email:', selectedEmail.id);
 
     if (markAsReadDelay === -1) {
       // Never mark as read automatically
-      debug.log('[Mark as Read] Never mode - email will stay unread');
+      debug.log('email', '[Mark as Read] Never mode - email will stay unread');
     } else if (markAsReadDelay === 0) {
       // Mark as read instantly
-      debug.log('[Mark as Read] Instant mode - marking as read now');
+      debug.log('email', '[Mark as Read] Instant mode - marking as read now');
       markAsRead(client, selectedEmail.id, true);
     } else {
       // Mark as read after delay
-      debug.log('[Mark as Read] Delayed mode - will mark as read in', markAsReadDelay, 'ms');
+      debug.log('email', '[Mark as Read] Delayed mode - will mark as read in', markAsReadDelay, 'ms');
       markAsReadTimeoutRef.current = setTimeout(() => {
-        debug.log('[Mark as Read] Timeout fired - marking as read now');
+        debug.log('email', '[Mark as Read] Timeout fired - marking as read now');
         markAsRead(client, selectedEmail.id, true);
         markAsReadTimeoutRef.current = null;
       }, markAsReadDelay);
@@ -424,7 +601,7 @@ export default function Home() {
     // Cleanup on unmount or when dependencies change
     return () => {
       if (markAsReadTimeoutRef.current) {
-        debug.log('[Mark as Read] Cleanup - clearing timeout');
+        debug.log('email', '[Mark as Read] Cleanup - clearing timeout');
         clearTimeout(markAsReadTimeoutRef.current);
         markAsReadTimeoutRef.current = null;
       }
@@ -439,7 +616,7 @@ export default function Home() {
       if (emailNotificationsEnabled && emailNotificationSound) {
         playNotificationSound(notificationSoundChoice);
       }
-      debug.log('New email received:', newEmailNotification.subject);
+      debug.log('email', 'New email received:', newEmailNotification.subject);
       clearNewEmailNotification();
     }
   }, [newEmailNotification, clearNewEmailNotification]);
@@ -519,7 +696,10 @@ export default function Home() {
 
   const handleEditDraft = async (email?: Email) => {
     if (!client) return;
-    let draft = email || selectedEmail;
+    const draftCandidate = email && typeof email === 'object' && typeof email.id === 'string'
+      ? email
+      : selectedEmail;
+    let draft = draftCandidate;
     if (!draft) return;
 
     // The email list only fetches limited properties (no bodyValues/htmlBody/bcc).
@@ -538,6 +718,16 @@ export default function Home() {
     const htmlBody = draft.htmlBody?.[0]?.partId && draft.bodyValues?.[draft.htmlBody[0].partId]
       ? draft.bodyValues[draft.htmlBody[0].partId].value
       : undefined;
+
+    // Try to find the identity that matches the draft's from address to preserve it
+    const draftFromEmail = draft.from?.[0]?.email;
+    const matchedIdentity = draftFromEmail
+      ? identities.find(id => id.email === draftFromEmail)
+      : null;
+
+    // Increment session ID to force the composer to remount with fresh state,
+    // even if it was already open (e.g. right-clicking a draft while composing).
+    setComposerSessionId(id => id + 1);
     setPendingDraft({
       to: draft.to?.map(a => a.email).filter(Boolean).join(', ') || '',
       cc: draft.cc?.map(a => a.email).filter(Boolean).join(', ') || '',
@@ -546,7 +736,7 @@ export default function Home() {
       body: htmlBody || bodyText,
       showCc: (draft.cc?.length || 0) > 0,
       showBcc: (draft.bcc?.length || 0) > 0,
-      selectedIdentityId: null,
+      selectedIdentityId: matchedIdentity?.id ?? null,
       subAddressTag: '',
       mode: 'compose',
       draftId: draft.id,
@@ -568,8 +758,8 @@ export default function Home() {
     if (isMobile) setActiveView('viewer');
   };
 
-  const handleDelete = async () => {
-    if (!client || !selectedEmail) return;
+  const handleDelete = async (emailToDelete: Email | null = selectedEmail) => {
+    if (!client || !emailToDelete) return;
 
     // Check if we're currently in the trash or junk folder
     const currentMailbox = mailboxes.find(m => m.id === selectedMailbox);
@@ -588,7 +778,7 @@ export default function Home() {
       if (!confirmed) return;
 
       try {
-        await deleteEmail(client, selectedEmail.id, true);
+        await deleteEmail(client, emailToDelete.id, true);
       } catch (error) {
         console.error("Failed to permanently delete email:", error);
       }
@@ -597,7 +787,7 @@ export default function Home() {
       const trashMailbox = mailboxes.find(m => m.role === 'trash' && !m.isShared);
       if (trashMailbox) {
         try {
-          await moveToMailbox(client, selectedEmail.id, trashMailbox.id);
+          await moveToMailbox(client, emailToDelete.id, trashMailbox.id);
         } catch (error) {
           console.error("Failed to move email to trash:", error);
         }
@@ -636,7 +826,7 @@ export default function Home() {
         if (archiveMode === 'year') {
           await moveThreadToMailbox(client, emailToArchive.id, yearMailbox.id);
         } else {
-          // archiveMode === 'month' — find or create month subfolder under year
+          // archiveMode === 'month' - find or create month subfolder under year
           const yearId = yearMailbox.originalId || yearMailbox.id;
           let monthMailbox = mailboxes.find(
             m => m.name === month && m.parentId === yearId
@@ -670,10 +860,10 @@ export default function Home() {
     }
   };
 
-  const handleMarkAsSpam = async () => {
-    if (!client || !selectedEmail) return;
+  const handleMarkAsSpam = async (emailToMark: Email | null = selectedEmail) => {
+    if (!client || !emailToMark) return;
 
-    const emailId = selectedEmail.id;
+    const emailId = emailToMark.id;
 
     try {
       await markAsSpam(client, emailId);
@@ -701,11 +891,11 @@ export default function Home() {
     }
   };
 
-  const handleUndoSpam = async () => {
-    if (!client || !selectedEmail) return;
+  const handleUndoSpam = async (emailToRestore: Email | null = selectedEmail) => {
+    if (!client || !emailToRestore) return;
 
     try {
-      await undoSpam(client, selectedEmail.id);
+      await undoSpam(client, emailToRestore.id);
 
       const toastInstance = (await import('sonner')).toast;
       toastInstance.success(t('email_viewer.spam.toast_not_spam_success'));
@@ -726,16 +916,22 @@ export default function Home() {
 
       const keywords = { ...email.keywords };
 
-      // Remove old label and legacy color tags - set to false for JMAP to remove them
+      if (color === null) {
+        // Remove all label/color tags
         Object.keys(keywords).forEach(key => {
           if (key.startsWith("$label:") || key.startsWith("$color:")) {
             keywords[key] = false;
           }
         });
-
-      // Add new label tag if specified (using new $label: prefix)
-      if (color) {
-        keywords[`$label:${color}`] = true;
+      } else {
+        const jmapKey = `$label:${color}`;
+        if (keywords[jmapKey] === true) {
+          // Toggle off if already active
+          keywords[jmapKey] = false;
+        } else {
+          // Add the tag without disturbing others
+          keywords[jmapKey] = true;
+        }
       }
 
       // Update email keywords via JMAP
@@ -755,6 +951,32 @@ export default function Home() {
   };
 
   const handleMailboxSelect = async (mailboxId: string) => {
+    if (isUnifiedMailboxId(mailboxId)) {
+      const role = UNIFIED_ROLE_BY_ID[mailboxId];
+      if (!role) return;
+
+      selectMailbox(mailboxId);
+      selectEmail(null);
+
+      if (isMobile) {
+        setSidebarOpen(false);
+        setActiveView("list");
+      }
+      if (isTablet) {
+        setTabletListVisible(true);
+      }
+
+      const built = buildUnifiedAccounts();
+      const populated = await populateUnifiedAccountMailboxes(built);
+      await fetchUnifiedEmailsAction(populated, role);
+      refreshUnifiedCounts(populated);
+      return;
+    }
+
+    if (isUnifiedView) {
+      exitUnifiedView();
+    }
+
     selectMailbox(mailboxId);
     selectEmail(null); // Clear selected email when switching mailboxes
 
@@ -838,6 +1060,7 @@ export default function Home() {
 
   const handleSearch = async (query: string) => {
     if (!client) return;
+    if (isUnifiedView) return;
     setSearchQuery(query);
     if (!isFilterEmpty(searchFilters)) {
       await advancedSearch(client);
@@ -856,6 +1079,7 @@ export default function Home() {
 
   const handleAdvancedSearch = async () => {
     if (!client) return;
+    if (isUnifiedView) return;
     await advancedSearch(client);
   };
 
@@ -865,9 +1089,9 @@ export default function Home() {
       clearTimeout(advancedSearchDebounceRef.current);
     }
     advancedSearchDebounceRef.current = setTimeout(() => {
-      if (client) advancedSearch(client);
+      if (client && !isUnifiedView) advancedSearch(client);
     }, 300);
-  }, [client, advancedSearch]);
+  }, [client, advancedSearch, isUnifiedView]);
 
   useEffect(() => {
     return () => {
@@ -967,6 +1191,10 @@ export default function Home() {
 
   // Get current mailbox name for mobile header
   const currentMailboxName = mailboxes.find(m => m.id === selectedMailbox)?.name || "Inbox";
+  const isFocusedMailLayout = mailLayout === 'focus';
+  const hasViewerContent = showComposer || Boolean(conversationThread) || Boolean(selectedEmail);
+  const shouldCollapseListPane = (isTablet && !tabletListVisible) || (!isMobile && isFocusedMailLayout && hasViewerContent);
+  const shouldHideViewerPane = !isMobile && isFocusedMailLayout && !hasViewerContent;
 
   // Handle email selection with mobile view switching
   const handleEmailSelect = async (email: { id: string }) => {
@@ -992,13 +1220,29 @@ export default function Home() {
 
     // Fetch the full content
     try {
-      // Find selected mailbox to determine accountId (for shared folders)
-      const mailbox = mailboxes.find(mb => mb.id === selectedMailbox);
-      // Only pass accountId for shared mailboxes
-      const accountId = mailbox?.isShared ? mailbox.accountId : undefined;
+      // In unified view each email carries its own accountId. Use that
+      // account's client so we fetch from the server that actually owns it.
+      const listEmail = emails.find(e => e.id === email.id);
+      const emailAccountId = isUnifiedView ? listEmail?.accountId : undefined;
+      const perAccountClient = emailAccountId
+        ? useAuthStore.getState().getClientForAccount(emailAccountId)
+        : undefined;
+      const fetchClient = perAccountClient ?? client;
 
-      const fullEmail = await client.getEmail(email.id, accountId);
+      // For shared folders on the primary client, we still need to pass the
+      // shared account's id. In unified view we use the per-account client
+      // directly, so no explicit accountId is needed.
+      const mailbox = mailboxes.find(mb => mb.id === selectedMailbox);
+      const accountId = perAccountClient
+        ? undefined
+        : mailbox?.isShared ? mailbox.accountId : undefined;
+
+      const fullEmail = await fetchClient.getEmail(email.id, accountId);
       if (fullEmail) {
+        if (emailAccountId) {
+          fullEmail.accountId = emailAccountId;
+          fullEmail.accountLabel = listEmail?.accountLabel;
+        }
         selectEmail(fullEmail);
         // Mark-as-read logic is now handled by useEffect
       }
@@ -1009,14 +1253,24 @@ export default function Home() {
     }
   };
 
-  // Handle back navigation from viewer on mobile
+  // Handle back navigation from viewer on mobile.
+  // Delegate to the browser history stack so this button is equivalent to
+  // the OS back button / mouse back button - popstate then restores the
+  // previous snapshot via handleNavRestore. The viewer is only reachable
+  // from a state that pushed history, so back() always lands on an app entry.
   const handleMobileBack = () => {
-    // If in conversation view, clear it
+    if (typeof window !== 'undefined') {
+      window.history.back();
+      return;
+    }
     if (conversationThread) {
       setConversationThread(null);
       setConversationEmails([]);
     }
     selectEmail(null);
+    if (isTablet) {
+      setTabletListVisible(true);
+    }
     setActiveView("list");
   };
 
@@ -1197,12 +1451,12 @@ export default function Home() {
               "max-md:flex-1 max-md:border-r-0",
               isMobile && activeView !== "list" && "max-md:hidden",
               // Tablet/Desktop: fixed width with collapse animation
-              "md:flex-shrink-0 md:shadow-sm",
+              shouldHideViewerPane ? "md:flex-1 md:border-r-0" : "md:flex-shrink-0",
+              "md:shadow-sm",
               !isResizing && "transition-all duration-200 ease-out",
-              // Tablet: collapse when email selected
-              isTablet && !tabletListVisible && "md:w-0 md:opacity-0 md:overflow-hidden md:border-r-0"
+              shouldCollapseListPane && "md:w-0 md:opacity-0 md:overflow-hidden md:border-r-0"
             )}
-            style={!isMobile && !(isTablet && !tabletListVisible) ? { width: emailListWidth } : undefined}
+            style={!isMobile && !shouldCollapseListPane && !shouldHideViewerPane ? { width: emailListWidth } : undefined}
           >
             {/* Mobile Header for List View */}
             <MobileHeader
@@ -1252,6 +1506,8 @@ export default function Home() {
                       className={cn("pl-9 h-9", searchQuery && "pr-8")}
                       data-search-input
                       data-tour="search-input"
+                      disabled={isUnifiedView}
+                      title={isUnifiedView ? t("unified_mailbox.search_unavailable") : undefined}
                     />
                     {searchQuery && (
                       <button
@@ -1267,13 +1523,15 @@ export default function Home() {
                   <button
                     type="button"
                     onClick={toggleAdvancedSearch}
+                    disabled={isUnifiedView}
                     className={cn(
                       "relative flex-shrink-0 p-2 rounded-md transition-colors",
+                      isUnifiedView && "opacity-50 cursor-not-allowed",
                       isAdvancedSearchOpen || activeFilterCount(searchFilters) > 0
                         ? "bg-primary/10 text-primary"
                         : "text-muted-foreground hover:text-foreground hover:bg-muted"
                     )}
-                    title={t("advanced_search.toggle_filters")}
+                    title={isUnifiedView ? t("unified_mailbox.search_unavailable") : t("advanced_search.toggle_filters")}
                   >
                     <Filter className="w-4 h-4" />
                     {!isAdvancedSearchOpen && activeFilterCount(searchFilters) > 0 && (
@@ -1457,8 +1715,7 @@ export default function Home() {
                   }
                 }}
                 onDelete={async (email) => {
-                  selectEmail(email);
-                  await handleDelete();
+                  await handleDelete(email);
                 }}
                 onArchive={async (email) => {
                   await handleArchive(email);
@@ -1472,12 +1729,10 @@ export default function Home() {
                   }
                 }}
                 onMarkAsSpam={async (email) => {
-                  selectEmail(email);
-                  await handleMarkAsSpam();
+                  await handleMarkAsSpam(email);
                 }}
                 onUndoSpam={async (email) => {
-                  selectEmail(email);
-                  await handleUndoSpam();
+                  await handleUndoSpam(email);
                 }}
                 onEditDraft={(email) => {
                   handleEditDraft(email);
@@ -1487,24 +1742,27 @@ export default function Home() {
             </ErrorBoundary>
             </div>
 
-            {/* Floating Compose Button (mobile) */}
-            {isMobile && (
+            {/* Floating Compose Button */}
             <Button
               onClick={() => {
                 setComposerMode('compose');
                 setShowComposer(true);
-                  setActiveView('viewer');
+                if (isMobile) setActiveView('viewer');
               }}
-                className="absolute bottom-4 right-4 z-40 h-14 w-14 rounded-full shadow-lg"
-                aria-label={t('sidebar.compose')}
-              >
-                <PenSquare className="h-6 w-6" />
-              </Button>
+              className={cn(
+                "absolute z-40 rounded-full shadow-lg",
+                isMobile ? "bottom-4 right-4 h-14 w-14" : "bottom-4 right-4 h-12 w-12"
               )}
+              aria-label={t('sidebar.compose')}
+              title={t('sidebar.compose_hint')}
+              data-tour="compose-button"
+            >
+              <PenSquare className={isMobile ? "h-6 w-6" : "h-5 w-5"} />
+            </Button>
           </div>
 
           {/* Email list resize handle (desktop only) */}
-          {!isMobile && !isTablet && (
+          {!isMobile && !isTablet && !isFocusedMailLayout && (
             <ResizeHandle
               onResizeStart={() => { dragStartWidth.current = emailListWidth; setIsResizing(true); }}
               onResize={(delta) => setEmailListWidth(dragStartWidth.current + delta)}
@@ -1521,7 +1779,8 @@ export default function Home() {
               "max-md:fixed max-md:inset-0 max-md:z-30",
               isMobile && activeView !== "viewer" && "max-md:hidden",
               // Tablet/Desktop: relative
-              "md:relative"
+              "md:relative",
+              shouldHideViewerPane && "md:hidden"
             )}
           >
             {/* Inline Composer - shown in viewer pane */}
@@ -1534,11 +1793,14 @@ export default function Home() {
                 }}
               >
                 <EmailComposer
+                  key={composerSessionId}
                   mode={pendingDraft?.mode ?? composerMode}
-                  replyTo={pendingDraft?.replyTo ?? (selectedEmail ? {
+                  replyTo={pendingDraft !== null ? pendingDraft.replyTo : (selectedEmail ? {
                     from: selectedEmail.from,
+                    replyToAddresses: selectedEmail.replyTo,
                     to: selectedEmail.to,
                     cc: selectedEmail.cc,
+                    bcc: selectedEmail.bcc,
                     subject: selectedEmail.subject,
                     body: selectedEmail.bodyValues?.[selectedEmail.textBody?.[0]?.partId || '']?.value || selectedEmail.preview || '',
                     htmlBody: selectedEmail.bodyValues?.[selectedEmail.htmlBody?.[0]?.partId || '']?.value || undefined,
@@ -1636,7 +1898,7 @@ export default function Home() {
                     onReplyAll={handleReplyAll}
                     onForward={handleForward}
                     onDelete={handleDelete}
-                    onArchive={handleArchive}
+                    onArchive={() => handleArchive()}
                     onToggleStar={handleToggleStar}
                     onSetColorTag={handleSetColorTag}
                     onMarkAsSpam={handleMarkAsSpam}
@@ -1648,14 +1910,15 @@ export default function Home() {
                     }}
                     onDownloadAttachment={handleDownloadAttachment}
                     onQuickReply={handleQuickReply}
-                    onBack={() => {
-                      setTabletListVisible(true);
-                      selectEmail(null);
-                    }}
+                    onBack={handleMobileBack}
                     onNavigateNext={handleNavigateNext}
                     onNavigatePrev={handleNavigatePrev}
                     onShowShortcuts={() => setShowShortcutsModal(true)}
                     onEditDraft={handleEditDraft}
+                    onCompose={() => {
+                      setComposerMode('compose');
+                      setShowComposer(true);
+                    }}
                     currentUserEmail={client?.getUsername()}
                     currentUserName={client?.getUsername()?.split("@")[0]}
                     currentMailboxRole={mailboxes.find(m => m.id === selectedMailbox)?.role}
@@ -1709,6 +1972,7 @@ export default function Home() {
 
         <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
         <ConfirmDialog {...confirmDialogProps} />
+        <TotpReauthDialog />
       </div>
     </DragDropProvider>
   );

app/[locale]/settings/page.tsx

@@ -36,6 +36,7 @@ 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 { AdvancedSettings } from '@/components/settings/advanced-settings';
@@ -211,7 +212,7 @@ export default function SettingsPage() {
       {activeTab === 'encryption' && <SmimeSettings />}
       {activeTab === 'vacation' && <VacationSettings />}
       {activeTab === 'calendar' && <><CalendarSettings /><div className="mt-8"><CalendarManagementSettings /></div></>}
-      {activeTab === 'contacts' && <ContactsSettings />}
+      {activeTab === 'contacts' && <><ContactsSettings /><div className="mt-8"><AddressBookManagementSettings /></div></>}
       {activeTab === 'filters' && <FilterSettings />}
       {activeTab === 'templates' && <TemplateSettings />}
       {activeTab === 'folders' && <FolderSettings />}

app/admin/auth/page.tsx

@@ -2,6 +2,7 @@
 
 import { useEffect, useState } from 'react';
 import { Save, Loader2, RotateCcw } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
 
 interface ConfigEntry {
   value: unknown;
@@ -19,7 +20,7 @@ export default function AdminAuthPage() {
 
   async function fetchConfig() {
     setLoading(true);
-    const res = await fetch('/api/admin/config');
+    const res = await apiFetch('/api/admin/config');
     if (res.ok) setConfig(await res.json());
     setLoading(false);
   }
@@ -39,7 +40,7 @@ export default function AdminAuthPage() {
     setSaving(true);
     setMessage(null);
 
-    const res = await fetch('/api/admin/config', {
+    const res = await apiFetch('/api/admin/config', {
       method: 'PATCH',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify(edits),
@@ -57,7 +58,7 @@ export default function AdminAuthPage() {
   }
 
   async function handleRevert(key: string) {
-    const res = await fetch('/api/admin/config', {
+    const res = await apiFetch('/api/admin/config', {
       method: 'DELETE',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ key }),

app/admin/branding/page.tsx

@@ -2,6 +2,7 @@
 
 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;
@@ -38,7 +39,7 @@ export default function AdminBrandingPage() {
 
   async function fetchConfig() {
     setLoading(true);
-    const res = await fetch('/api/admin/config');
+    const res = await apiFetch('/api/admin/config');
     if (res.ok) setConfig(await res.json());
     setLoading(false);
   }
@@ -58,7 +59,7 @@ export default function AdminBrandingPage() {
     setSaving(true);
     setMessage(null);
 
-    const res = await fetch('/api/admin/config', {
+    const res = await apiFetch('/api/admin/config', {
       method: 'PATCH',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify(edits),
@@ -83,7 +84,7 @@ export default function AdminBrandingPage() {
     formData.append('file', file);
     formData.append('slot', slot);
 
-    const res = await fetch('/api/admin/branding', {
+    const res = await apiFetch('/api/admin/branding', {
       method: 'POST',
       body: formData,
     });
@@ -112,7 +113,7 @@ export default function AdminBrandingPage() {
   async function handleDeleteUpload(slot: string) {
     setMessage(null);
 
-    const res = await fetch('/api/admin/branding', {
+    const res = await apiFetch('/api/admin/branding', {
       method: 'DELETE',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ slot }),
@@ -133,7 +134,7 @@ export default function AdminBrandingPage() {
   }
 
   async function handleRevert(key: string) {
-    const res = await fetch('/api/admin/config', {
+    const res = await apiFetch('/api/admin/config', {
       method: 'DELETE',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ key }),

app/admin/change-password/page.tsx

@@ -3,6 +3,7 @@
 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();
@@ -28,7 +29,7 @@ export default function ChangePasswordPage() {
     }
 
     setLoading(true);
-    const res = await fetch('/api/admin/change-password', {
+    const res = await apiFetch('/api/admin/change-password', {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ currentPassword, newPassword }),

app/admin/layout.tsx

@@ -24,8 +24,10 @@ import {
 import { cn } from '@/lib/utils';
 import { useConfig } from '@/hooks/use-config';
 import { useThemeStore } from '@/stores/theme-store';
+import { getActiveAccountSlotHeaders } from '@/lib/auth/active-account-slot';
 
 import { useAuthStore } from '@/stores/auth-store';
+import { apiFetch } from '@/lib/browser-navigation';
 
 const NAV_GROUPS = [
   {
@@ -78,19 +80,13 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
   }, [pathname]);
 
   function getJmapHeaders(): Record<string, string> {
-    const client = useAuthStore.getState().client;
-    if (!client) return {};
-    return {
-      'Authorization': client.getAuthHeader(),
-      'X-JMAP-Server-URL': client.getServerUrl(),
-      'X-JMAP-Username': client.getUsername(),
-    };
+    return getActiveAccountSlotHeaders();
   }
 
   async function checkAuth() {
     try {
       const jmapHeaders = getJmapHeaders();
-      const res = await fetch('/api/admin/auth', { headers: jmapHeaders });
+      const res = await apiFetch('/api/admin/auth', { headers: jmapHeaders });
       const data = await res.json();
 
       const stalwartAdmin = data.stalwartAdmin === true;
@@ -109,7 +105,7 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
 
       // If Stalwart admin but not yet authenticated, auto-login
       if (stalwartAdmin) {
-        const loginRes = await fetch('/api/admin/auth', {
+        const loginRes = await apiFetch('/api/admin/auth', {
           method: 'POST',
           headers: { 'Content-Type': 'application/json', ...jmapHeaders },
           body: JSON.stringify({ stalwartAuth: true }),
@@ -127,7 +123,7 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
   }
 
   async function handleLogout() {
-    await fetch('/api/admin/auth', { method: 'DELETE' });
+    await apiFetch('/api/admin/auth', { method: 'DELETE' });
     router.replace('/admin/login');
   }
 

app/admin/login/page.tsx

@@ -5,6 +5,7 @@ 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();
@@ -21,7 +22,7 @@ export default function AdminLoginPage() {
     setLoading(true);
 
     try {
-      const res = await fetch('/api/admin/auth', {
+      const res = await apiFetch('/api/admin/auth', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ password }),

app/admin/logs/page.tsx

@@ -3,6 +3,7 @@
 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 default function AdminLogsPage() {
   const [entries, setEntries] = useState<AuditEntry[]>([]);
@@ -17,7 +18,7 @@ export default function AdminLogsPage() {
     const params = new URLSearchParams({ page: String(page), limit: String(limit) });
     if (actionFilter) params.set('action', actionFilter);
 
-    const res = await fetch(`/api/admin/audit?${params}`);
+    const res = await apiFetch(`/api/admin/audit?${params}`);
     if (res.ok) {
       const data = await res.json();
       setEntries(data.entries || []);
@@ -138,7 +139,7 @@ export default function AdminLogsPage() {
 }
 
 function formatDetail(detail: Record<string, unknown>): string {
-  if (!detail || Object.keys(detail).length === 0) return '—';
+  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)) {

app/admin/marketplace/page.tsx

@@ -2,6 +2,7 @@
 
 import { useEffect, useState, useCallback } from 'react';
 import { Search, Download, Check, Loader2, Store, Puzzle, SwatchBook, Star, Filter } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
 
 interface Extension {
   slug: string;
@@ -57,7 +58,7 @@ export default function AdminMarketplacePage() {
       params.set('perPage', String(perPage));
       params.set('sort', 'newest');
 
-      const res = await fetch(`/api/admin/marketplace?${params}`);
+      const res = await apiFetch(`/api/admin/marketplace?${params}`);
       if (!res.ok) {
         const data = await res.json().catch(() => ({}));
         setError(data.error || 'Failed to connect to extension directory');
@@ -95,7 +96,7 @@ export default function AdminMarketplacePage() {
     setMessage(null);
 
     try {
-      const res = await fetch('/api/admin/marketplace', {
+      const res = await apiFetch('/api/admin/marketplace', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({
@@ -116,7 +117,7 @@ export default function AdminMarketplacePage() {
         setMessage({ type: 'error', text: data.error || 'Installation failed' });
       }
     } catch {
-      setMessage({ type: 'error', text: 'Installation failed — network error' });
+      setMessage({ type: 'error', text: 'Installation failed - network error' });
     } finally {
       setInstalling(null);
     }

app/admin/page.tsx

@@ -4,6 +4,7 @@ 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;
@@ -38,13 +39,13 @@ export default function AdminDashboardPage() {
 
   async function fetchDashboardData() {
     const [statusRes, auditRes, configRes, adminConfigRes, pluginRes, themeRes, policyRes] = await Promise.all([
-      fetch('/api/admin/auth'),
-      fetch('/api/admin/audit?limit=10'),
-      fetch('/api/config'),
-      fetch('/api/admin/config'),
-      fetch('/api/admin/plugins').catch(() => null),
-      fetch('/api/admin/themes').catch(() => null),
-      fetch('/api/admin/policy').catch(() => null),
+      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),
     ]);
 
     if (statusRes.ok) setStatus(await statusRes.json());
@@ -75,7 +76,7 @@ export default function AdminDashboardPage() {
 
     if (configData?.jmapServerUrl) {
       try {
-        const jmapRes = await fetch('/api/config');
+        const jmapRes = await apiFetch('/api/config');
         setJmapHealth(jmapRes.ok ? 'ok' : 'error');
       } catch {
         setJmapHealth('error');
@@ -98,8 +99,8 @@ export default function AdminDashboardPage() {
     setWarnings(w);
   }
 
-  const jmapUrl = config?.jmapServerUrl || '—';
-  const jmapHostname = jmapUrl !== '—' ? (() => { try { return new URL(jmapUrl).hostname; } catch { return jmapUrl; } })() : '—';
+  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">
@@ -126,9 +127,9 @@ export default function AdminDashboardPage() {
       {/* Server Info */}
       <SettingsSection title="Server" description="Application and connection details">
         <SettingItem label="Application">
-          <span className="text-sm text-foreground">{config?.appName || '—'}</span>
+          <span className="text-sm text-foreground">{config?.appName || '-'}</span>
         </SettingItem>
-        <SettingItem label="JMAP Server" description={jmapUrl !== '—' ? jmapUrl : undefined}>
+        <SettingItem label="JMAP Server" description={jmapUrl !== '-' ? jmapUrl : undefined}>
           <span className="text-sm text-foreground">{jmapHostname}</span>
         </SettingItem>
         <SettingItem label="JMAP Connection">

app/admin/plugins/[id]/page.tsx

@@ -0,0 +1,286 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { useParams } from 'next/navigation';
+import { Puzzle, ArrowLeft, Loader2, Eye, EyeOff } from 'lucide-react';
+import Link from 'next/link';
+import { apiFetch } from '@/lib/browser-navigation';
+
+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>;
+}
+
+export default function PluginConfigPage() {
+  const params = useParams();
+  const pluginId = params.id as string;
+  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(() => {
+    fetchData();
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [pluginId]);
+
+  // Initialize form values from config + schema defaults when data loads
+  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 fetchData() {
+    setLoading(true);
+    try {
+      const [pluginsRes, configRes] = await Promise.all([
+        apiFetch('/api/admin/plugins'),
+        apiFetch(`/api/admin/plugins/${encodeURIComponent(pluginId)}/config`),
+      ]);
+
+      if (pluginsRes.ok) {
+        const plugins: PluginInfo[] = await pluginsRes.json();
+        setPlugin(plugins.find(p => p.id === pluginId) || null);
+      }
+
+      if (configRes.ok) {
+        setConfig(await configRes.json());
+      }
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleSaveAll() {
+    if (!plugin?.configSchema) return;
+    setSaving(true);
+    setMessage(null);
+
+    // Validate required fields
+    for (const [key, field] of Object.entries(plugin.configSchema)) {
+      if (field.required && !formValues[key]?.trim()) {
+        setMessage({ type: 'error', text: `"${field.label}" is required` });
+        setSaving(false);
+        return;
+      }
+    }
+
+    try {
+      // Save each changed field
+      let hasError = false;
+      for (const [key, field] of Object.entries(plugin.configSchema)) {
+        const newVal = formValues[key] ?? '';
+        const oldVal = config[key] !== undefined ? String(config[key]) : '';
+
+        // Skip unchanged fields (and skip secret fields that show as empty when they have a stored value)
+        if (newVal === oldVal) continue;
+        if (field.type === 'secret' && !newVal && config[key]) continue;
+
+        // Convert types
+        let value: unknown = newVal;
+        if (field.type === 'boolean') value = newVal === 'true';
+        else if (field.type === 'number') value = Number(newVal);
+
+        // Delete if clearing a non-required field
+        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">
+        <Link href="/admin/plugins" 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
+        </Link>
+        <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">
+        <Link href="/admin/plugins" className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground">
+          <ArrowLeft className="w-4 h-4" />
+        </Link>
+        <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>
+      )}
+    </div>
+  );
+}

app/admin/plugins/page.tsx

@@ -1,9 +1,11 @@
 'use client';
 
 import { useEffect, useState, useRef } from 'react';
-import { Upload, Trash2, Power, PowerOff, AlertTriangle, Loader2, Package, Save, Shield, Lock, LockOpen } from 'lucide-react';
+import Link from 'next/link';
+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';
 
 interface PluginEntry {
   id: string;
@@ -33,7 +35,7 @@ export default function AdminPluginsPage() {
 
   async function fetchPolicy() {
     try {
-      const res = await fetch('/api/admin/policy');
+      const res = await apiFetch('/api/admin/policy');
       if (res.ok) {
         const data = await res.json();
         setPolicy(data);
@@ -59,11 +61,20 @@ export default function AdminPluginsPage() {
     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 fetch('/api/admin/policy', {
+      const res = await apiFetch('/api/admin/policy', {
         method: 'PUT',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify(policy),
@@ -85,7 +96,7 @@ export default function AdminPluginsPage() {
   async function fetchPlugins() {
     setLoading(true);
     try {
-      const res = await fetch('/api/admin/plugins');
+      const res = await apiFetch('/api/admin/plugins');
       if (res.ok) setPlugins(await res.json());
     } finally {
       setLoading(false);
@@ -103,7 +114,7 @@ export default function AdminPluginsPage() {
     formData.append('file', file);
 
     try {
-      const res = await fetch('/api/admin/plugins', {
+      const res = await apiFetch('/api/admin/plugins', {
         method: 'POST',
         body: formData,
       });
@@ -126,7 +137,7 @@ export default function AdminPluginsPage() {
 
   async function togglePlugin(id: string, enabled: boolean) {
     setMessage(null);
-    const res = await fetch('/api/admin/plugins', {
+    const res = await apiFetch('/api/admin/plugins', {
       method: 'PATCH',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ id, enabled }),
@@ -146,7 +157,7 @@ export default function AdminPluginsPage() {
     const body: Record<string, unknown> = { id, forceEnabled };
     if (forceEnabled) body.enabled = true;
 
-    const res = await fetch('/api/admin/plugins', {
+    const res = await apiFetch('/api/admin/plugins', {
       method: 'PATCH',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify(body),
@@ -180,7 +191,7 @@ export default function AdminPluginsPage() {
     }
     let failed = 0;
     for (const p of disabled) {
-      const res = await fetch('/api/admin/plugins', {
+      const res = await apiFetch('/api/admin/plugins', {
         method: 'PATCH',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ id: p.id, enabled: true }),
@@ -206,7 +217,7 @@ export default function AdminPluginsPage() {
     }
     let failed = 0;
     for (const p of enabled) {
-      const res = await fetch('/api/admin/plugins', {
+      const res = await apiFetch('/api/admin/plugins', {
         method: 'PATCH',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ id: p.id, enabled: false }),
@@ -226,7 +237,7 @@ export default function AdminPluginsPage() {
     if (!confirm(`Remove plugin "${name}"? This cannot be undone.`)) return;
 
     setMessage(null);
-    const res = await fetch('/api/admin/plugins', {
+    const res = await apiFetch('/api/admin/plugins', {
       method: 'DELETE',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ id }),
@@ -247,6 +258,7 @@ export default function AdminPluginsPage() {
 
   const pluginsEnabled = policy.features.pluginsEnabled ?? true;
   const pluginsUploadEnabled = policy.features.pluginsUploadEnabled ?? true;
+  const requirePluginApproval = policy.features.requirePluginApproval ?? true;
 
   return (
     <div className="space-y-6">
@@ -319,6 +331,17 @@ export default function AdminPluginsPage() {
             </button>
           </div>
 
+          <div className="px-4 py-3 flex items-center justify-between 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>
+
           {/* Force enable / disable all */}
           {plugins.length > 0 && (
             <div className="px-4 py-3 flex items-center justify-between gap-4">
@@ -396,6 +419,13 @@ export default function AdminPluginsPage() {
               </div>
 
               <div className="flex items-center gap-2">
+                <Link
+                  href={`/admin/plugins/${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" />
+                </Link>
                 <button
                   onClick={() => toggleForceEnabled(plugin.id, !plugin.forceEnabled)}
                   title={plugin.forceEnabled ? 'Remove force-enable (users can disable)' : 'Force enable (users cannot disable)'}

app/admin/policy/page.tsx

@@ -4,6 +4,7 @@ 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';
 
 // Feature gates managed on their own admin pages (excluded from this list)
 const EXCLUDED_FEATURE_GATES: (keyof FeatureGates)[] = ['pluginsEnabled', 'pluginsUploadEnabled', 'themesEnabled', 'userThemesEnabled'];
@@ -19,6 +20,7 @@ const FEATURE_GATE_LABELS: Partial<Record<keyof FeatureGates, { label: string; d
   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 = [
@@ -28,10 +30,12 @@ const RESTRICTABLE_SETTINGS = [
   { 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'] },
   { 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' },
@@ -51,7 +55,7 @@ export default function AdminPolicyPage() {
   async function fetchPolicy() {
     setLoading(true);
     try {
-      const res = await fetch('/api/admin/policy');
+      const res = await apiFetch('/api/admin/policy');
       if (res.ok) {
         const data = await res.json();
         setPolicy(data);
@@ -103,7 +107,7 @@ export default function AdminPolicyPage() {
     setSaving(true);
     setMessage(null);
 
-    const res = await fetch('/api/admin/policy', {
+    const res = await apiFetch('/api/admin/policy', {
       method: 'PUT',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify(policy),

app/admin/settings/page.tsx

@@ -2,6 +2,7 @@
 
 import { useEffect, useState } from 'react';
 import { Save, RotateCcw, Loader2 } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
 
 interface ConfigEntry {
   value: unknown;
@@ -21,7 +22,7 @@ export default function AdminSettingsPage() {
 
   async function fetchConfig() {
     setLoading(true);
-    const res = await fetch('/api/admin/config');
+    const res = await apiFetch('/api/admin/config');
     if (res.ok) {
       setConfig(await res.json());
     }
@@ -43,7 +44,7 @@ export default function AdminSettingsPage() {
     setSaving(true);
     setMessage(null);
 
-    const res = await fetch('/api/admin/config', {
+    const res = await apiFetch('/api/admin/config', {
       method: 'PATCH',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify(edits),
@@ -61,7 +62,7 @@ export default function AdminSettingsPage() {
   }
 
   async function handleRevert(key: string) {
-    const res = await fetch('/api/admin/config', {
+    const res = await apiFetch('/api/admin/config', {
       method: 'DELETE',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ key }),
@@ -112,6 +113,14 @@ export default function AdminSettingsPage() {
       <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} />
         <TextSetting label="Stalwart API URL" configKey="stalwartApiUrl" value={currentValue('stalwartApiUrl') as string} source={config.stalwartApiUrl?.source} onChange={handleChange} onRevert={handleRevert} placeholder="https://mail.example.com/api" />
         <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} />

app/admin/themes/page.tsx

@@ -4,6 +4,7 @@ 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' },
@@ -38,7 +39,7 @@ export default function AdminThemesPage() {
 
   async function fetchPolicy() {
     try {
-      const res = await fetch('/api/admin/policy');
+      const res = await apiFetch('/api/admin/policy');
       if (res.ok) {
         const data = await res.json();
         setPolicy({
@@ -122,7 +123,7 @@ export default function AdminThemesPage() {
     setSavingPolicy(true);
     setMessage(null);
     try {
-      const res = await fetch('/api/admin/policy', {
+      const res = await apiFetch('/api/admin/policy', {
         method: 'PUT',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify(policy),
@@ -144,7 +145,7 @@ export default function AdminThemesPage() {
   async function fetchThemes() {
     setLoading(true);
     try {
-      const res = await fetch('/api/admin/themes');
+      const res = await apiFetch('/api/admin/themes');
       if (res.ok) setThemes(await res.json());
     } finally {
       setLoading(false);
@@ -162,7 +163,7 @@ export default function AdminThemesPage() {
     formData.append('file', file);
 
     try {
-      const res = await fetch('/api/admin/themes', {
+      const res = await apiFetch('/api/admin/themes', {
         method: 'POST',
         body: formData,
       });
@@ -185,7 +186,7 @@ export default function AdminThemesPage() {
 
   async function toggleTheme(id: string, enabled: boolean) {
     setMessage(null);
-    const res = await fetch('/api/admin/themes', {
+    const res = await apiFetch('/api/admin/themes', {
       method: 'PATCH',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ id, enabled }),
@@ -204,7 +205,7 @@ export default function AdminThemesPage() {
     const body: Record<string, unknown> = { id, forceEnabled };
     if (forceEnabled) body.enabled = true;
 
-    const res = await fetch('/api/admin/themes', {
+    const res = await apiFetch('/api/admin/themes', {
       method: 'PATCH',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify(body),
@@ -237,7 +238,7 @@ export default function AdminThemesPage() {
     }
     let failed = 0;
     for (const t of disabled) {
-      const res = await fetch('/api/admin/themes', {
+      const res = await apiFetch('/api/admin/themes', {
         method: 'PATCH',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ id: t.id, enabled: true }),
@@ -262,7 +263,7 @@ export default function AdminThemesPage() {
     }
     let failed = 0;
     for (const t of enabled) {
-      const res = await fetch('/api/admin/themes', {
+      const res = await apiFetch('/api/admin/themes', {
         method: 'PATCH',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ id: t.id, enabled: false }),
@@ -282,7 +283,7 @@ export default function AdminThemesPage() {
     if (!confirm(`Remove theme "${name}"? This cannot be undone.`)) return;
 
     setMessage(null);
-    const res = await fetch('/api/admin/themes', {
+    const res = await apiFetch('/api/admin/themes', {
       method: 'DELETE',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ id }),

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

@@ -2,6 +2,20 @@ import { NextRequest, NextResponse } from 'next/server';
 import { logger } from '@/lib/logger';
 import { getStalwartCredentials } from '@/lib/stalwart/credentials';
 
+/**
+ * Parse Stalwart error response to extract meaningful error message
+ */
+function parseStalwartError(responseText: string): string {
+  try {
+    const error = JSON.parse(responseText);
+    if (error.detail) return error.detail;
+    if (error.error) return error.error;
+    return `HTTP ${error.status || 'Error'}`;
+  } catch {
+    return responseText;
+  }
+}
+
 /**
  * GET /api/account/stalwart/auth
  * Proxy to Stalwart GET /api/account/auth
@@ -20,9 +34,10 @@ export async function GET(request: NextRequest) {
 
     if (!response.ok) {
       const text = await response.text();
-      logger.warn('Stalwart auth info failed', { status: response.status });
+      const detail = parseStalwartError(text);
+      logger.warn('Stalwart auth info failed', { status: response.status, detail });
       return NextResponse.json(
-        { error: 'Failed to fetch auth info', details: text },
+        { error: detail || 'Failed to fetch auth info' },
         { status: response.status }
       );
     }

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

@@ -2,6 +2,20 @@ import { NextRequest, NextResponse } from 'next/server';
 import { logger } from '@/lib/logger';
 import { getStalwartCredentials } from '@/lib/stalwart/credentials';
 
+/**
+ * Parse Stalwart error response to extract meaningful error message
+ */
+function parseStalwartError(responseText: string): string {
+  try {
+    const error = JSON.parse(responseText);
+    if (error.detail) return error.detail;
+    if (error.error) return error.error;
+    return `HTTP ${error.status || 'Error'}`;
+  } catch {
+    return responseText;
+  }
+}
+
 /**
  * GET /api/account/stalwart/crypto
  * Proxy to Stalwart GET /api/account/crypto
@@ -20,9 +34,10 @@ export async function GET(request: NextRequest) {
 
     if (!response.ok) {
       const text = await response.text();
-      logger.warn('Stalwart crypto info failed', { status: response.status });
+      const detail = parseStalwartError(text);
+      logger.warn('Stalwart crypto info failed', { status: response.status, detail });
       return NextResponse.json(
-        { error: 'Failed to fetch crypto info', details: text },
+        { error: detail || 'Failed to fetch crypto info' },
         { status: response.status }
       );
     }

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

@@ -2,8 +2,9 @@ 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 { SESSION_COOKIE_MAX_AGE, sessionCookieName } from '@/lib/auth/session-cookie';
 import { getStalwartCredentials } from '@/lib/stalwart/credentials';
+import { setStalwartAuthContextInStore } from '@/lib/stalwart/auth-context';
 
 const COOKIE_OPTIONS = {
   httpOnly: true,
@@ -69,10 +70,19 @@ export async function POST(request: NextRequest) {
     }
 
     // If session cookie exists, update it with the new password
+    const cookieStore = await cookies();
+
     if (creds.hasSessionCookie) {
       const newToken = encryptSession(creds.serverUrl, creds.username, newPassword);
-      const cookieStore = await cookies();
-      cookieStore.set(SESSION_COOKIE, newToken, COOKIE_OPTIONS);
+      cookieStore.set(sessionCookieName(creds.slot), newToken, COOKIE_OPTIONS);
+    }
+
+    if (creds.authHeader.startsWith('Basic ')) {
+      setStalwartAuthContextInStore(cookieStore, creds.slot, {
+        serverUrl: creds.serverUrl,
+        username: creds.username,
+        authHeader: `Basic ${Buffer.from(`${creds.username}:${newPassword}`).toString('base64')}`,
+      });
     }
 
     return NextResponse.json({ ok: true });

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

@@ -2,6 +2,20 @@ import { NextRequest, NextResponse } from 'next/server';
 import { logger } from '@/lib/logger';
 import { getStalwartCredentials } from '@/lib/stalwart/credentials';
 
+/**
+ * Parse Stalwart error response to extract meaningful error message
+ */
+function parseStalwartError(responseText: string): string {
+  try {
+    const error = JSON.parse(responseText);
+    if (error.detail) return error.detail;
+    if (error.error) return error.error;
+    return `HTTP ${error.status || 'Error'}`;
+  } catch {
+    return responseText;
+  }
+}
+
 /**
  * GET /api/account/stalwart/principal
  * Proxy to Stalwart GET /api/principal/{username}
@@ -20,9 +34,10 @@ export async function GET(request: NextRequest) {
 
     if (!response.ok) {
       const text = await response.text();
-      logger.warn('Stalwart principal fetch failed', { status: response.status });
+      const detail = parseStalwartError(text);
+      logger.warn('Stalwart principal fetch failed', { status: response.status, detail });
       return NextResponse.json(
-        { error: 'Failed to fetch principal', details: text },
+        { error: detail || 'Failed to fetch principal' },
         { status: response.status }
       );
     }

app/api/admin/audit/route.ts

@@ -4,7 +4,7 @@ import { readAuditLog } from '@/lib/admin/audit';
 import { logger } from '@/lib/logger';
 
 /**
- * GET /api/admin/audit — Get paginated audit log entries (admin-protected)
+ * GET /api/admin/audit - Get paginated audit log entries (admin-protected)
  */
 export async function GET(request: NextRequest) {
   try {

app/api/admin/auth/route.ts

@@ -30,7 +30,7 @@ async function checkStalwartAdmin(request: NextRequest): Promise<boolean> {
 }
 
 /**
- * POST /api/admin/auth — Login
+ * POST /api/admin/auth - Login
  */
 export async function POST(request: NextRequest) {
   try {
@@ -92,7 +92,7 @@ export async function POST(request: NextRequest) {
 }
 
 /**
- * GET /api/admin/auth — Check session status
+ * GET /api/admin/auth - Check session status
  * Also checks if the user is a Stalwart admin (admin panel enabled even without password).
  */
 export async function GET(request: NextRequest) {
@@ -136,7 +136,7 @@ export async function GET(request: NextRequest) {
 }
 
 /**
- * DELETE /api/admin/auth — Logout
+ * DELETE /api/admin/auth - Logout
  */
 export async function DELETE(request: NextRequest) {
   try {

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

@@ -14,7 +14,7 @@ const MIME_TYPES: Record<string, string> = {
 };
 
 /**
- * GET /api/admin/branding/[filename] — Serve uploaded branding images
+ * 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.

app/api/admin/branding/route.ts

@@ -33,7 +33,7 @@ function sanitizeFilename(name: string): string {
 }
 
 /**
- * POST /api/admin/branding — Upload a branding image file
+ * POST /api/admin/branding - Upload a branding image file
  *
  * Expects multipart/form-data with:
  *   - file: the image file
@@ -105,7 +105,7 @@ export async function POST(request: NextRequest) {
 }
 
 /**
- * DELETE /api/admin/branding — Remove an uploaded branding file
+ * DELETE /api/admin/branding - Remove an uploaded branding file
  *
  * Expects JSON body: { slot: string }
  */

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

@@ -5,7 +5,7 @@ import { auditLog } from '@/lib/admin/audit';
 import { logger } from '@/lib/logger';
 
 /**
- * POST /api/admin/change-password — Change admin password
+ * POST /api/admin/change-password - Change admin password
  */
 export async function POST(request: NextRequest) {
   try {

app/api/admin/config/route.ts

@@ -6,7 +6,7 @@ import { CONFIG_ENV_MAP } from '@/lib/admin/types';
 import { logger } from '@/lib/logger';
 
 /**
- * GET /api/admin/config — Get full config with sources (admin-protected)
+ * GET /api/admin/config - Get full config with sources (admin-protected)
  */
 export async function GET() {
   try {
@@ -26,7 +26,7 @@ export async function GET() {
 }
 
 /**
- * PATCH /api/admin/config — Update config overrides (admin-protected)
+ * PATCH /api/admin/config - Update config overrides (admin-protected)
  */
 export async function PATCH(request: NextRequest) {
   try {
@@ -64,7 +64,7 @@ export async function PATCH(request: NextRequest) {
 }
 
 /**
- * DELETE /api/admin/config — Remove admin override for a key (revert to env/default)
+ * DELETE /api/admin/config - Remove admin override for a key (revert to env/default)
  */
 export async function DELETE(request: NextRequest) {
   try {

app/api/admin/marketplace/route.ts

@@ -17,7 +17,7 @@ import { sanitizeThemeCSS, validateThemeCSSSafety } from '@/lib/theme-loader';
 const DIRECTORY_URL = process.env.EXTENSION_DIRECTORY_URL || 'http://localhost:3001';
 
 /**
- * GET /api/admin/marketplace — Search/browse the extension directory
+ * GET /api/admin/marketplace - Search/browse the extension directory
  * Proxies to the extension directory API
  */
 export async function GET(request: NextRequest) {
@@ -75,7 +75,7 @@ export async function GET(request: NextRequest) {
 }
 
 /**
- * POST /api/admin/marketplace — Install an extension from the directory
+ * POST /api/admin/marketplace - Install an extension from the directory
  * Body: { slug: string, version: string, type: 'plugin' | 'theme' }
  */
 export async function POST(request: NextRequest) {
@@ -196,6 +196,26 @@ export async function POST(request: NextRequest) {
 
       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[]);

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

@@ -2,7 +2,7 @@ import { NextRequest, NextResponse } from 'next/server';
 import { getPluginBundle, getPlugin } from '@/lib/admin/plugin-registry';
 
 /**
- * GET /api/admin/plugins/[id]/bundle — Serve plugin JS bundle
+ * 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.

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

@@ -0,0 +1,120 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { getPlugin } from '@/lib/admin/plugin-registry';
+import { getPluginConfig, setPluginConfig, deletePluginConfigKey } from '@/lib/admin/plugin-config';
+import { requireAdminAuth } from '@/lib/admin/session';
+
+/**
+ * GET /api/admin/plugins/[id]/config - Read all config for a plugin
+ *
+ * Returns the full config object for admin-configured plugin settings.
+ * This endpoint is accessible from the client-side plugin API.
+ */
+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]$/.test(id)) {
+      return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
+    }
+
+    const plugin = await getPlugin(id);
+    if (!plugin) {
+      return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
+    }
+
+    const config = await getPluginConfig(id);
+    return NextResponse.json(config, {
+      headers: { 'Cache-Control': 'no-store' },
+    });
+  } catch {
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * PUT /api/admin/plugins/[id]/config - Set a config key
+ *
+ * Body: { key: string, value: unknown }
+ * Requires admin authentication (checked via admin session).
+ */
+export async function PUT(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  try {
+    const result = await requireAdminAuth();
+    if ('error' in result) return result.error;
+
+    const { id } = await params;
+
+    if (!/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(id)) {
+      return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
+    }
+
+    const plugin = await getPlugin(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._-]+$/.test(body.key)) {
+      return NextResponse.json({ error: 'Invalid key format' }, { status: 400 });
+    }
+
+    await setPluginConfig(id, body.key, body.value);
+    return NextResponse.json({ ok: true });
+  } catch {
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * DELETE /api/admin/plugins/[id]/config - Delete a config key
+ *
+ * Body: { key: string }
+ */
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  try {
+    const result = await requireAdminAuth();
+    if ('error' in result) return result.error;
+
+    const { id } = await params;
+
+    if (!/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.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

@@ -23,7 +23,7 @@ const SUSPICIOUS_JS_PATTERNS = [
 ];
 
 /**
- * GET /api/admin/plugins — List all admin-managed plugins
+ * GET /api/admin/plugins - List all admin-managed plugins
  */
 export async function GET() {
   try {
@@ -41,7 +41,7 @@ export async function GET() {
 }
 
 /**
- * POST /api/admin/plugins — Upload and install a plugin ZIP
+ * POST /api/admin/plugins - Upload and install a plugin ZIP
  */
 export async function POST(request: NextRequest) {
   try {
@@ -139,12 +139,18 @@ export async function POST(request: NextRequest) {
     }
     const code = await entryFile.async('string');
 
-    // Security warnings (logged but not blocking for admin)
+    // 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 now = new Date().toISOString();
     const plugin: ServerPlugin = {
@@ -157,14 +163,17 @@ export async function POST(request: NextRequest) {
       permissions: (manifest.permissions as string[]) || [],
       entrypoint: manifest.entrypoint as string,
       enabled: true,
+      ...(manifest.configSchema && typeof manifest.configSchema === 'object'
+        ? { configSchema: manifest.configSchema as ServerPlugin['configSchema'] }
+        : {}),
       installedAt: now,
       updatedAt: now,
     };
 
     await savePlugin(plugin, code);
-    await auditLog('plugin.install', { id: plugin.id, name: plugin.name, version: plugin.version, warnings }, ip);
+    await auditLog('plugin.install', { id: plugin.id, name: plugin.name, version: plugin.version }, ip);
 
-    return NextResponse.json({ plugin, warnings });
+    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 });
@@ -172,7 +181,7 @@ export async function POST(request: NextRequest) {
 }
 
 /**
- * PATCH /api/admin/plugins — Update plugin metadata (enable/disable)
+ * PATCH /api/admin/plugins - Update plugin metadata (enable/disable)
  * Body: { id: string, enabled: boolean }
  */
 export async function PATCH(request: NextRequest) {
@@ -209,7 +218,7 @@ export async function PATCH(request: NextRequest) {
 }
 
 /**
- * DELETE /api/admin/plugins — Remove a plugin
+ * DELETE /api/admin/plugins - Remove a plugin
  * Body: { id: string }
  */
 export async function DELETE(request: NextRequest) {

app/api/admin/policy/route.ts

@@ -6,7 +6,7 @@ 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)
+ * GET /api/admin/policy - Get settings policy (NOT admin-protected - users read this)
  */
 export async function GET() {
   try {
@@ -22,7 +22,7 @@ export async function GET() {
 }
 
 /**
- * PUT /api/admin/policy — Update settings policy (admin-protected)
+ * PUT /api/admin/policy - Update settings policy (admin-protected)
  */
 export async function PUT(request: NextRequest) {
   try {

app/api/admin/stalwart-check/route.ts

@@ -5,7 +5,7 @@ import { getStalwartCredentials } from '@/lib/stalwart/credentials';
 /**
  * GET /api/admin/stalwart-check
  * Check if the currently logged-in user is a Stalwart admin.
- * Probes the admin-only principal-list endpoint — if the user can access it, they're an admin.
+ * Probes the admin-only principal-list endpoint - if the user can access it, they're an admin.
  */
 export async function GET(request: NextRequest) {
   try {

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

@@ -3,7 +3,7 @@ import { getThemeCSS, getThemeRegistry } from '@/lib/admin/plugin-registry';
 import { logger } from '@/lib/logger';
 
 /**
- * GET /api/admin/themes/[id]/css — Serve theme CSS to clients
+ * GET /api/admin/themes/[id]/css - Serve theme CSS to clients
  */
 export async function GET(
   _request: NextRequest,

app/api/admin/themes/route.ts

@@ -14,7 +14,7 @@ import { MAX_THEME_SIZE } from '@/lib/plugin-types';
 import { sanitizeThemeCSS, validateThemeCSSSafety } from '@/lib/theme-loader';
 
 /**
- * GET /api/admin/themes — List all admin-managed themes
+ * GET /api/admin/themes - List all admin-managed themes
  */
 export async function GET() {
   try {
@@ -32,7 +32,7 @@ export async function GET() {
 }
 
 /**
- * POST /api/admin/themes — Upload and install a theme ZIP
+ * POST /api/admin/themes - Upload and install a theme ZIP
  */
 export async function POST(request: NextRequest) {
   try {
@@ -151,7 +151,7 @@ export async function POST(request: NextRequest) {
 }
 
 /**
- * PATCH /api/admin/themes — Update theme metadata (enable/disable)
+ * PATCH /api/admin/themes - Update theme metadata (enable/disable)
  * Body: { id: string, enabled: boolean }
  */
 export async function PATCH(request: NextRequest) {
@@ -188,7 +188,7 @@ export async function PATCH(request: NextRequest) {
 }
 
 /**
- * DELETE /api/admin/themes — Remove a theme
+ * DELETE /api/admin/themes - Remove a theme
  * Body: { id: string }
  */
 export async function DELETE(request: NextRequest) {

app/api/auth/session/route.ts

@@ -4,6 +4,11 @@ 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, verifyJmapAuth } from '@/lib/auth/verify-jmap-auth';
+import {
+  clearStalwartAuthContextInStore,
+  setStalwartAuthContextInStore,
+} from '@/lib/stalwart/auth-context';
 
 const COOKIE_OPTIONS = {
   ...getCookieOptions(),
@@ -31,12 +36,23 @@ export async function POST(request: NextRequest) {
 
     const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : getSlot(request);
     const cookieName = sessionCookieName(slot);
-    const token = encryptSession(serverUrl, username, password);
+    const authHeader = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
+    const normalizedServerUrl = await verifyJmapAuth(serverUrl, authHeader);
+    const token = encryptSession(normalizedServerUrl, username, password);
     const cookieStore = await cookies();
     cookieStore.set(cookieName, token, COOKIE_OPTIONS);
+    setStalwartAuthContextInStore(cookieStore, slot, {
+      serverUrl: normalizedServerUrl,
+      username,
+      authHeader,
+    });
 
     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 });
   }
@@ -56,9 +72,66 @@ 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' },
     });
@@ -77,10 +150,12 @@ export async function DELETE(request: NextRequest) {
       // Delete all session cookies (slots 0-4)
       for (let i = 0; i <= 4; 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/start/route.ts

@@ -7,13 +7,14 @@ import { getRequiredConfig } from '@/lib/oauth/token-exchange';
 import { discoverOAuth } from '@/lib/oauth/discovery';
 import { OAUTH_SCOPES } from '@/lib/oauth/tokens';
 import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { readFileEnv } from '@/lib/read-file-env';
 
 const SSO_PENDING_COOKIE = 'sso_pending';
 const SSO_PENDING_MAX_AGE = 300; // 5 minutes
 
 export async function POST(request: NextRequest) {
   try {
-    if (!process.env.SESSION_SECRET) {
+    if (!process.env.SESSION_SECRET && !readFileEnv(process.env.SESSION_SECRET_FILE)) {
       return NextResponse.json({ error: 'SESSION_SECRET is required for SSO' }, { status: 500 });
     }
 

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

@@ -0,0 +1,46 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { logger } from '@/lib/logger';
+import { JmapAuthVerificationError, verifyJmapAuth } from '@/lib/auth/verify-jmap-auth';
+import { setStalwartAuthContext } from '@/lib/stalwart/auth-context';
+
+function getSlot(request: NextRequest, bodySlot: unknown): number {
+  if (typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4) {
+    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 > 4 ? 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 });
+    }
+
+    const slot = getSlot(request, bodySlot);
+    const normalizedServerUrl = await verifyJmapAuth(serverUrl, authHeader);
+
+    await setStalwartAuthContext(slot, {
+      serverUrl: normalizedServerUrl,
+      username,
+      authHeader,
+    });
+
+    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/totp-token-exchange/route.ts

@@ -0,0 +1,189 @@
+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';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { readFileEnv } from '@/lib/read-file-env';
+
+/**
+ * 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);
+  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 } = await request.json();
+
+    if (!serverUrl || !username || !password) {
+      return NextResponse.json({ error: 'Missing required parameters' }, { status: 400 });
+    }
+
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : 0;
+
+    // Use the server-side JMAP_SERVER_URL if set (may differ from the
+    // public URL the browser uses, e.g. inside Docker).
+    const internalServerUrl = process.env.JMAP_SERVER_URL || process.env.NEXT_PUBLIC_JMAP_SERVER_URL || serverUrl;
+
+    const tokenEndpoint = await findTokenEndpoint(internalServerUrl);
+    if (!tokenEndpoint) {
+      // Also try with the client-provided URL in case the internal one differs
+      const clientEndpoint = internalServerUrl !== serverUrl ? await findTokenEndpoint(serverUrl) : null;
+      if (!clientEndpoint) {
+        logger.warn('TOTP token exchange: no token endpoint found', { serverUrl, internalServerUrl });
+        return NextResponse.json({ error: 'no_token_endpoint', detail: 'Could not discover OAuth token endpoint on the mail server' }, { status: 404 });
+      }
+      return await attemptAllStrategies(clientEndpoint, username, password, slot);
+    }
+
+    return await attemptAllStrategies(tokenEndpoint, username, password, slot);
+  } 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,
+  username: string,
+  password: string,
+  slot: number,
+): Promise<NextResponse> {
+  logger.info('TOTP token exchange: found token endpoint', { tokenEndpoint });
+
+  const clientId = process.env.OAUTH_CLIENT_ID;
+  const clientSecret = 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)');
+      return await storeAndRespond(result.tokens, slot);
+    }
+    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)');
+      return await storeAndRespond(result.tokens, slot);
+    }
+    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)');
+      return await storeAndRespond(result.tokens, slot);
+    }
+    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)');
+      return await storeAndRespond(result.tokens, slot);
+    }
+    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,
+): Promise<NextResponse> {
+  if (tokens.refresh_token) {
+    const cookieName = refreshTokenCookieName(slot);
+    const cookieStore = await cookies();
+    cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
+  }
+
+  return NextResponse.json({
+    access_token: tokens.access_token,
+    expires_in: tokens.expires_in || 3600,
+    has_refresh_token: !!tokens.refresh_token,
+  });
+}

app/api/config/route.ts

@@ -1,6 +1,7 @@
 import { NextResponse } from 'next/server';
 import { logger } from '@/lib/logger';
 import { configManager } from '@/lib/admin/config-manager';
+import { readFileEnv } from '@/lib/read-file-env';
 
 /**
  * Runtime configuration endpoint
@@ -33,8 +34,8 @@ export async function GET() {
     oauthOnly,
     oauthClientId: configManager.get<string>('oauthClientId', ''),
     oauthIssuerUrl: configManager.get<string>('oauthIssuerUrl', ''),
-    rememberMeEnabled: !!process.env.SESSION_SECRET,
-    settingsSyncEnabled: configManager.get<boolean>('settingsSyncEnabled', false) && !!process.env.SESSION_SECRET,
+    rememberMeEnabled: !!process.env.SESSION_SECRET || !!readFileEnv(process.env.SESSION_SECRET_FILE),
+    settingsSyncEnabled: configManager.get<boolean>('settingsSyncEnabled', false) && (!!process.env.SESSION_SECRET || !!readFileEnv(process.env.SESSION_SECRET_FILE)),
     stalwartFeaturesEnabled,
     devMode: configManager.get<boolean>('devMode', false),
     faviconUrl: configManager.get<string>('faviconUrl', '/branding/Bulwark_Favicon.svg'),
@@ -47,6 +48,7 @@ export async function GET() {
     loginPrivacyPolicyUrl: configManager.get<string>('loginPrivacyPolicyUrl', ''),
     loginWebsiteUrl: configManager.get<string>('loginWebsiteUrl', ''),
     demoMode: configManager.get<boolean>('demoMode', false),
+    allowCustomJmapEndpoint: configManager.get<boolean>('allowCustomJmapEndpoint', false),
     autoSsoEnabled: configManager.get<boolean>('autoSsoEnabled', false),
     embeddedMode: !!allowedFrameAncestors && allowedFrameAncestors !== "'none'",
     parentOrigin: configManager.get<string>('parentOrigin', ''),

app/api/fetch-ical/route.ts

@@ -1,9 +1,39 @@
+import { lookup } from 'node:dns/promises';
+import { BlockList, isIP } from 'node:net';
 import { NextRequest, NextResponse } from 'next/server';
 
 const MAX_RESPONSE_SIZE = 10 * 1024 * 1024; // 10MB
 const FETCH_TIMEOUT_MS = 15000;
 
-function isValidExternalUrl(urlString: string): boolean {
+const blockedAddressRanges = new BlockList();
+blockedAddressRanges.addAddress('0.0.0.0');
+blockedAddressRanges.addAddress('127.0.0.1');
+blockedAddressRanges.addSubnet('10.0.0.0', 8);
+blockedAddressRanges.addSubnet('172.16.0.0', 12);
+blockedAddressRanges.addSubnet('192.168.0.0', 16);
+blockedAddressRanges.addSubnet('169.254.0.0', 16);
+blockedAddressRanges.addAddress('::', 'ipv6');
+blockedAddressRanges.addAddress('::1', 'ipv6');
+blockedAddressRanges.addSubnet('fc00::', 7, 'ipv6');
+blockedAddressRanges.addSubnet('fe80::', 10, 'ipv6');
+
+function normalizeHostname(hostname: string): string {
+  return hostname.replace(/^\[(.*)\]$/, '$1').toLowerCase();
+}
+
+function isBlockedIpAddress(hostname: string): boolean {
+  const normalized = normalizeHostname(hostname);
+  const family = isIP(normalized);
+  if (family === 4) {
+    return blockedAddressRanges.check(normalized, 'ipv4');
+  }
+  if (family === 6) {
+    return blockedAddressRanges.check(normalized, 'ipv6');
+  }
+  return false;
+}
+
+async function isValidExternalUrl(urlString: string): Promise<boolean> {
   let url: URL;
   try {
     url = new URL(urlString);
@@ -15,21 +45,16 @@ function isValidExternalUrl(urlString: string): boolean {
     return false;
   }
 
-  const hostname = url.hostname.toLowerCase();
+  const hostname = normalizeHostname(url.hostname);
 
   // Block private/internal hostnames
   if (
     hostname === 'localhost' ||
-    hostname === '127.0.0.1' ||
-    hostname === '::1' ||
-    hostname === '0.0.0.0' ||
+    hostname.endsWith('.localhost') ||
     hostname.endsWith('.local') ||
     hostname.endsWith('.internal') ||
     hostname.endsWith('.arpa') ||
-    hostname.startsWith('10.') ||
-    hostname.startsWith('192.168.') ||
-    hostname.startsWith('169.254.') ||
-    /^172\.(1[6-9]|2\d|3[01])\./.test(hostname)
+    hostname.endsWith('.localdomain')
   ) {
     return false;
   }
@@ -39,7 +64,24 @@ function isValidExternalUrl(urlString: string): boolean {
     return false;
   }
 
+  if (isBlockedIpAddress(hostname)) {
+    return false;
+  }
+
+  if (isIP(hostname)) {
     return true;
+  }
+
+  try {
+    const records = await lookup(hostname, { all: true, verbatim: true });
+    if (records.length === 0) {
+      return false;
+    }
+    return records.every((record) => !isBlockedIpAddress(record.address));
+  } catch {
+    return false;
+  }
+
 }
 
 export async function POST(request: NextRequest) {
@@ -56,7 +98,7 @@ export async function POST(request: NextRequest) {
     return NextResponse.json({ error: 'URL is required' }, { status: 400 });
   }
 
-  if (!isValidExternalUrl(url)) {
+  if (!(await isValidExternalUrl(url))) {
     return NextResponse.json({ error: 'Invalid or disallowed URL' }, { status: 400 });
   }
 
@@ -64,20 +106,43 @@ export async function POST(request: NextRequest) {
     const controller = new AbortController();
     const timeout = setTimeout(() => controller.abort(), FETCH_TIMEOUT_MS);
 
-    const response = await fetch(url, {
+    const MAX_REDIRECTS = 5;
+    let currentUrl = url;
+    let response: Response | undefined;
+
+    for (let i = 0; i <= MAX_REDIRECTS; i++) {
+      if (!(await isValidExternalUrl(currentUrl))) {
+        clearTimeout(timeout);
+        return NextResponse.json({ error: 'Redirect to disallowed URL' }, { status: 400 });
+      }
+
+      response = await fetch(currentUrl, {
         signal: controller.signal,
         headers: {
           'Accept': 'text/calendar, application/ics, text/plain, */*',
           'User-Agent': 'JMAP-Webmail/1.0 Calendar-Fetcher',
         },
-      redirect: 'follow',
+        redirect: 'manual',
       });
 
+      if (response.status >= 300 && response.status < 400) {
+        const location = response.headers.get('location');
+        if (!location) {
+          clearTimeout(timeout);
+          return NextResponse.json({ error: 'Redirect without Location header' }, { status: 502 });
+        }
+        // Resolve relative redirects
+        currentUrl = new URL(location, currentUrl).toString();
+        continue;
+      }
+      break;
+    }
+
     clearTimeout(timeout);
 
-    if (!response.ok) {
+    if (!response || !response.ok) {
       return NextResponse.json(
-        { error: `Remote server returned ${response.status}` },
+        { error: `Remote server returned ${response?.status ?? 'unknown'}` },
         { status: 502 }
       );
     }

app/api/plugins/route.ts

@@ -3,10 +3,10 @@ import { getPluginRegistry, getThemeRegistry } from '@/lib/admin/plugin-registry
 import { logger } from '@/lib/logger';
 
 /**
- * GET /api/plugins — Public endpoint for clients to discover server-managed plugins & themes
+ * GET /api/plugins - Public endpoint for clients to discover server-managed plugins & themes
  *
  * Returns all enabled plugins and themes so the client can sync them to IndexedDB.
- * No admin auth required — this is how regular users receive plugins/themes.
+ * No admin auth required - this is how regular users receive plugins/themes.
  */
 export async function GET() {
   try {

app/api/pwa-icon/[size]/route.ts

@@ -0,0 +1,66 @@
+import { NextRequest, NextResponse } from 'next/server';
+import sharp from 'sharp';
+import path from 'node:path';
+import { readFile } from 'node:fs/promises';
+
+const VALID_SIZES = new Set([192, 512]);
+
+// Cache resized images in memory to avoid reprocessing on every request
+const cache = new Map<number, Blob>();
+
+async function fetchSourceImage(iconUrl: string): Promise<Buffer> {
+  // Absolute URL (http/https)
+  if (iconUrl.startsWith('http://') || iconUrl.startsWith('https://')) {
+    const res = await fetch(iconUrl);
+    if (!res.ok) throw new Error(`Failed to fetch PWA icon: ${res.status}`);
+    return Buffer.from(await res.arrayBuffer());
+  }
+
+  // Path relative to public/ directory
+  const publicPath = path.join(process.cwd(), 'public', iconUrl.replace(/^\//, ''));
+  return readFile(publicPath);
+}
+
+export async function GET(
+  _req: NextRequest,
+  { params }: { params: Promise<{ size: string }> }
+) {
+  const { size: sizeParam } = await params;
+  const size = parseInt(sizeParam, 10);
+
+  if (!VALID_SIZES.has(size)) {
+    return new NextResponse('Invalid size. Allowed: 192, 512', { status: 400 });
+  }
+
+  const iconUrl = process.env.PWA_ICON_URL || process.env.FAVICON_URL;
+  if (!iconUrl) {
+    return new NextResponse('No PWA icon configured', { status: 404 });
+  }
+
+  const pngHeaders = {
+    'Content-Type': 'image/png',
+    'Cache-Control': 'public, max-age=86400',
+  };
+
+  try {
+    if (cache.has(size)) {
+      return new NextResponse(cache.get(size)!, { headers: pngHeaders });
+    }
+
+    const sourceBuffer = await fetchSourceImage(iconUrl);
+    const resized = await sharp(sourceBuffer)
+      .resize(size, size, { fit: 'contain', background: { r: 0, g: 0, b: 0, alpha: 0 } })
+      .png()
+      .toBuffer();
+
+    const ab = new ArrayBuffer(resized.byteLength);
+    new Uint8Array(ab).set(resized);
+    const blob = new Blob([ab], { type: 'image/png' });
+    cache.set(size, blob);
+
+    return new NextResponse(blob, { headers: pngHeaders });
+  } catch (err) {
+    console.error('Failed to generate PWA icon:', err);
+    return new NextResponse('Failed to generate icon', { status: 500 });
+  }
+}

app/api/settings/route.ts

@@ -3,8 +3,10 @@ import { cookies } from 'next/headers';
 import { logger } from '@/lib/logger';
 import { decryptSession } from '@/lib/auth/crypto';
 import { sessionCookieName } from '@/lib/auth/session-cookie';
+import { readStalwartAuthContextFromStore } from '@/lib/stalwart/auth-context';
 import { saveUserSettings, loadUserSettings, deleteUserSettings } from '@/lib/settings-sync';
 import { configManager } from '@/lib/admin/config-manager';
+import { readFileEnv } from '@/lib/read-file-env';
 
 function classifyError(error: unknown): { message: string; status: number } {
   const code = (error as NodeJS.ErrnoException).code;
@@ -47,33 +49,43 @@ function classifyError(error: unknown): { message: string; status: number } {
 }
 
 function isEnabled(): boolean {
-  return process.env.SETTINGS_SYNC_ENABLED === 'true' && !!process.env.SESSION_SECRET;
+  return process.env.SETTINGS_SYNC_ENABLED === 'true' && (!!process.env.SESSION_SECRET || !!readFileEnv(process.env.SESSION_SECRET_FILE));
+}
+
+/** Strip trailing slashes so differently-formatted URLs still match. */
+function normalizeUrl(url: string): string {
+  return url.replace(/\/+$/, '');
 }
 
 /**
  * Verify identity against session cookies across all account slots.
  * With multi-account, the requesting account may be on any slot (0-4).
- * Returns true if any slot matches OR if no session cookies exist at all.
+ * Checks both basic-auth session cookies and stalwart auth context cookies
+ * (used by OAuth/SSO and TOTP-upgraded sessions).
+ * Returns true only if a matching cookie is found.
  */
 async function verifyIdentity(username: string, serverUrl: string): Promise<boolean> {
   const cookieStore = await cookies();
-  let hasAnyCookie = false;
+  const normalizedServerUrl = normalizeUrl(serverUrl);
 
   for (let slot = 0; slot <= 4; slot++) {
+    // Check basic-auth session cookie
     const token = cookieStore.get(sessionCookieName(slot))?.value;
-    if (!token) continue;
-    hasAnyCookie = true;
-
+    if (token) {
       const session = decryptSession(token);
-    if (session && session.username === username && session.serverUrl === serverUrl) {
-      return true; // Found a matching slot
+      if (session && session.username === username && normalizeUrl(session.serverUrl) === normalizedServerUrl) {
+        return true;
       }
     }
 
-  // No cookies at all → can't verify, allow (same-origin protection applies)
-  if (!hasAnyCookie) return true;
+    // Check stalwart auth context cookie (set for all auth modes)
+    const ctx = readStalwartAuthContextFromStore(cookieStore, slot);
+    if (ctx && ctx.username === username && normalizeUrl(ctx.serverUrl) === normalizedServerUrl) {
+      return true;
+    }
+  }
 
-  // Cookies exist but none matched → identity mismatch
+  // No matching session found (or no cookies at all) → reject
   return false;
 }
 
@@ -123,7 +135,7 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: 'Identity mismatch' }, { status: 403 });
     }
 
-    // Enforce admin policy — strip locked settings so users can't override them
+    // Enforce admin policy - strip locked settings so users can't override them
     await configManager.ensureLoaded();
     const policy = configManager.getPolicy();
     const filteredSettings = { ...settings };

app/api/webdav/route.ts

@@ -4,6 +4,32 @@ import { getStalwartCredentials } from '@/lib/stalwart/credentials';
 
 const ALLOWED_METHODS = new Set(['PROPFIND', 'MKCOL', 'GET', 'PUT', 'DELETE', 'MOVE', 'COPY']);
 
+function normalizeDavRelativePath(rawPath: string): string {
+  const sanitized = rawPath.replace(/\\/g, '/').split(/[?#]/, 1)[0] ?? '';
+  const segments = sanitized.split('/').filter(Boolean);
+
+  return segments.map((segment) => {
+    let decoded: string;
+    try {
+      decoded = decodeURIComponent(segment);
+    } catch {
+      throw new Error('Invalid WebDAV path encoding');
+    }
+
+    if (decoded === '.' || decoded === '..' || decoded.includes('/') || decoded.includes('\\') || decoded.includes('\0')) {
+      throw new Error('Invalid WebDAV path segment');
+    }
+
+    return encodeURIComponent(decoded);
+  }).join('/');
+}
+
+function buildDavTargetUrl(baseUrl: string, username: string, rawPath: string): string {
+  const rootUrl = new URL(`${baseUrl.replace(/\/$/, '')}/dav/file/${encodeURIComponent(username)}/`);
+  const relativePath = normalizeDavRelativePath(rawPath);
+  return relativePath ? new URL(relativePath, rootUrl).toString() : rootUrl.toString();
+}
+
 /**
  * POST /api/webdav
  * Proxies WebDAV requests to the Stalwart server.
@@ -29,11 +55,8 @@ export async function POST(request: NextRequest) {
     }
 
     const davPath = request.headers.get('X-WebDAV-Path') || '/';
-    const cleanPath = davPath.replace(/^\/+/, '');
     const baseUrl = creds.apiUrl.replace(/\/$/, '');
-    const targetUrl = cleanPath
-      ? `${baseUrl}/dav/file/${encodeURIComponent(creds.username)}/${cleanPath}`
-      : `${baseUrl}/dav/file/${encodeURIComponent(creds.username)}/`;
+    const targetUrl = buildDavTargetUrl(baseUrl, creds.username, davPath);
 
     // Build headers for the upstream request
     const upstreamHeaders: Record<string, string> = {
@@ -50,19 +73,20 @@ export async function POST(request: NextRequest) {
     // For MOVE/COPY, construct the full Destination URL from the relative path
     const destination = request.headers.get('X-WebDAV-Destination');
     if (destination) {
-      const cleanDest = destination.replace(/^\/+/, '');
-      upstreamHeaders['Destination'] = cleanDest
-        ? `${baseUrl}/dav/file/${encodeURIComponent(creds.username)}/${cleanDest}`
-        : `${baseUrl}/dav/file/${encodeURIComponent(creds.username)}/`;
+      upstreamHeaders['Destination'] = buildDavTargetUrl(baseUrl, creds.username, destination);
     }
 
     const overwrite = request.headers.get('Overwrite');
     if (overwrite) upstreamHeaders['Overwrite'] = overwrite;
 
-    // Forward request body for methods that need it
-    let body: ArrayBuffer | null = null;
-    if (method === 'PROPFIND' || method === 'PUT') {
+    // Forward request body for methods that need it.
+    // PUT streams directly to upstream to avoid buffering large uploads in memory.
+    // PROPFIND bodies are small XML and are read fully.
+    let body: ArrayBuffer | ReadableStream<Uint8Array> | null = null;
+    if (method === 'PROPFIND') {
       body = await request.arrayBuffer();
+    } else if (method === 'PUT') {
+      body = request.body;
     }
 
     const response = await fetch(targetUrl, {
@@ -70,7 +94,9 @@ export async function POST(request: NextRequest) {
       headers: upstreamHeaders,
       body,
       redirect: 'follow',
-    });
+      // `duplex: 'half'` is required by undici when sending a streaming request body.
+      ...(method === 'PUT' ? { duplex: 'half' } : {}),
+    } as Parameters<typeof fetch>[1] & { duplex?: 'half' });
 
     // For file downloads (GET), stream the response back
     if (method === 'GET') {
@@ -104,6 +130,10 @@ export async function POST(request: NextRequest) {
       status: response.status,
     });
   } catch (error) {
+    if (error instanceof Error && error.message.startsWith('Invalid WebDAV path')) {
+      return NextResponse.json({ error: error.message }, { status: 400 });
+    }
+
     logger.error('WebDAV proxy error', { error: error instanceof Error ? error.message : 'Unknown' });
     return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
   }

app/globals.css

@@ -208,6 +208,11 @@ body {
   padding: 1rem 1.25rem;
 }
 
+.email-content-text a {
+  color: var(--color-primary);
+  text-decoration: underline;
+}
+
 .email-content {
   font-family:
     -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",

app/icon.svg

@@ -1,3 +1,20 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Generator: Gravit.io -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style="isolation:isolate" viewBox="0 0 1000 1000" width="1000pt" height="1000pt"><defs><clipPath id="_clipPath_Sdk6Fary7vPYZxd20WRVIKca0qb2ogEk"><rect width="1000" height="1000"/></clipPath></defs><g clip-path="url(#_clipPath_Sdk6Fary7vPYZxd20WRVIKca0qb2ogEk)"><rect width="1000" height="1000" style="fill:rgb(0,0,0)" fill-opacity="0"/><path d=" M 483.028 563.647 L 63.713 187.183 C 59.029 182.978 55.226 174.454 55.226 168.159 L 55.226 122.542 C 55.226 116.247 60.206 109.988 66.339 108.573 L 215.181 74.225 C 221.314 72.809 226.293 76.77 226.293 83.065 L 226.293 176.92 L 352.034 147.895 C 358.167 146.479 363.147 140.219 363.147 133.925 L 363.147 51.483 C 363.147 45.189 368.126 38.93 374.259 37.514 L 488.888 11.061 C 495.021 9.646 504.979 9.646 511.112 11.061 L 625.741 37.514 C 631.874 38.93 636.853 45.189 636.853 51.483 L 636.853 133.925 C 636.853 140.219 641.833 146.479 647.966 147.895 L 773.707 176.92 L 773.707 83.065 C 773.707 76.77 778.686 72.809 784.819 74.225 L 933.661 108.573 C 939.794 109.988 944.774 116.247 944.774 122.542 L 944.774 168.159 C 944.774 174.454 940.971 182.978 936.287 187.183 L 516.972 563.647 C 507.605 572.056 492.395 572.056 483.028 563.647 Z " fill="rgb(219,45,84)"/><path d=" M 944.774 332.832 L 944.774 396.969 C 944.774 403.263 941.16 411.987 936.709 416.437 L 884.411 468.736 C 879.96 473.186 876.347 481.91 876.347 488.204 L 876.347 682.08 C 876.345 718.462 866.664 750.017 847.953 778.668 L 658.833 589.547 L 944.774 332.832 Z " fill="rgb(219,45,84)"/><path d=" M 55.226 332.832 L 55.226 385.564 C 55.226 398.153 62.453 415.6 71.355 424.501 L 107.525 460.671 C 116.426 469.573 123.653 487.02 123.653 499.609 L 123.653 682.08 C 123.655 718.462 133.336 750.017 152.047 778.668 L 341.167 589.547 L 55.226 332.832 Z " fill="rgb(219,45,84)"/><path d=" M 765.645 857.641 C 701.996 901.327 612.26 941.932 500 990 Q 500 990 500 990 C 387.74 941.932 298.004 901.327 234.355 857.641 L 427.917 664.079 C 435.604 668.703 443.74 672.579 452.215 675.636 C 467.543 681.179 483.703 684.007 500 683.996 C 516.297 684.007 532.457 681.179 547.785 675.636 C 556.261 672.579 564.396 668.703 572.083 664.079 L 765.645 857.641 Z " fill="rgb(219,45,84)"/></g></svg>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style="isolation:isolate" viewBox="0 0 1000 1000">
+  <defs>
+    <clipPath id="_clipPath_ONeeZd4dujNSzmUupv5CE8R64LUE9BqV"><rect width="1000" height="1000"/></clipPath>
+    <style>
+      .icon-bg { fill: #ffffff; }
+      .icon-mark { fill: rgb(219,45,84); }
+      @media (prefers-color-scheme: dark) {
+        .icon-bg { fill: #18181b; }
+      }
+    </style>
+  </defs>
+  <g clip-path="url(#_clipPath_ONeeZd4dujNSzmUupv5CE8R64LUE9BqV)">
+    <rect width="1000" height="1000" class="icon-bg"/>
+    <path d=" M 489.315 575.068 L 225.342 338.071 C 222.394 335.424 220 330.058 220 326.095 L 220 297.377 C 220 293.415 223.135 289.474 226.996 288.583 L 320.697 266.96 C 324.558 266.069 327.692 268.563 327.692 272.525 L 327.692 331.61 L 406.851 313.338 C 410.712 312.446 413.846 308.506 413.846 304.543 L 413.846 252.643 C 413.846 248.681 416.981 244.741 420.842 243.85 L 493.004 227.197 C 496.865 226.306 503.135 226.306 506.996 227.197 L 579.158 243.85 C 583.019 244.741 586.154 248.681 586.154 252.643 L 586.154 304.543 C 586.154 308.506 589.288 312.446 593.149 313.338 L 672.308 331.61 L 672.308 272.525 C 672.308 268.563 675.442 266.069 679.303 266.96 L 773.004 288.583 C 776.865 289.474 780 293.415 780 297.377 L 780 326.095 C 780 330.058 777.606 335.424 774.658 338.071 L 510.685 575.068 C 504.788 580.362 495.212 580.362 489.315 575.068 Z " class="icon-mark"/>
+    <path d=" M 780 429.762 L 780 470.138 C 780 474.101 777.725 479.593 774.923 482.394 L 742 515.318 C 739.198 518.12 736.923 523.612 736.923 527.574 L 736.923 649.625 C 736.922 672.529 730.827 692.394 719.048 710.431 L 599.991 591.373 L 780 429.762 Z " class="icon-mark"/>
+    <path d=" M 220 429.762 L 220 462.959 C 220 470.884 224.55 481.867 230.153 487.471 L 252.924 510.241 C 258.527 515.845 263.077 526.829 263.077 534.754 L 263.077 649.625 C 263.078 672.529 269.173 692.394 280.952 710.431 L 400.009 591.373 L 220 429.762 Z " class="icon-mark"/>
+    <path d=" M 667.232 760.147 C 627.163 787.649 570.672 813.211 500 843.472 Q 500 843.472 500 843.472 C 429.328 813.211 372.837 787.649 332.768 760.147 L 454.622 638.293 C 459.461 641.204 464.582 643.644 469.918 645.569 C 479.567 649.058 489.741 650.839 500 650.832 C 510.259 650.839 520.433 649.058 530.082 645.569 C 535.418 643.644 540.539 641.204 545.378 638.293 L 667.232 760.147 Z " class="icon-mark"/>
+  </g>
+</svg>

app/layout.tsx

@@ -2,6 +2,8 @@ import type { Metadata } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
 import { headers } from "next/headers";
 import { getLocale } from "next-intl/server";
+import { PWAInstallPrompt } from "@/components/pwa-install-prompt";
+import { ServiceWorkerRegistration } from "@/components/service-worker-registration";
 import "./globals.css";
 
 const geistSans = Geist({
@@ -20,6 +22,14 @@ export async function generateMetadata(): Promise<Metadata> {
   return {
     title: process.env.APP_NAME || process.env.NEXT_PUBLIC_APP_NAME || "Webmail",
     description: "Minimalist webmail client using JMAP protocol",
+    appleWebApp: {
+      capable: true,
+      statusBarStyle: "black-translucent",
+      title: process.env.APP_NAME || process.env.NEXT_PUBLIC_APP_NAME || "Webmail",
+    },
+    formatDetection: {
+      telephone: false,
+    },
     ...(faviconUrl ? { icons: { icon: faviconUrl } } : {}),
   };
 }
@@ -36,6 +46,14 @@ export default async function RootLayout({
   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} />
         )}
@@ -63,7 +81,9 @@ export default async function RootLayout({
       <body
         className={`${geistSans.variable} ${geistMono.variable} antialiased`}
       >
+        <ServiceWorkerRegistration />
         {children}
+        <PWAInstallPrompt />
       </body>
     </html>
   );

app/manifest.ts

@@ -0,0 +1,53 @@
+import type { MetadataRoute } from "next";
+
+export default function manifest(): MetadataRoute.Manifest {
+  const appName =
+    process.env.APP_NAME ||
+    process.env.NEXT_PUBLIC_APP_NAME ||
+    "Bulwark Webmail";
+
+  const shortName = process.env.APP_SHORT_NAME || appName;
+  const description =
+    process.env.APP_DESCRIPTION ||
+    "A modern webmail client built for Stalwart Mail Server";
+  const themeColor = process.env.PWA_THEME_COLOR || "#ffffff";
+  const backgroundColor = process.env.PWA_BACKGROUND_COLOR || "#ffffff";
+
+  // If PWA_ICON_URL or FAVICON_URL is configured, serve dynamically resized PNGs
+  // via /api/pwa-icon/[size]. Otherwise fall back to the default Bulwark PNGs.
+  const hasCustomIcon = !!(process.env.PWA_ICON_URL || process.env.FAVICON_URL);
+
+  const icons: MetadataRoute.Manifest["icons"] = hasCustomIcon
+    ? [
+        { src: "/api/pwa-icon/192", sizes: "192x192", type: "image/png", purpose: "any" },
+        { src: "/api/pwa-icon/512", sizes: "512x512", type: "image/png", purpose: "any" },
+        { src: "/api/pwa-icon/192", sizes: "192x192", type: "image/png", purpose: "maskable" },
+        { src: "/api/pwa-icon/512", sizes: "512x512", type: "image/png", purpose: "maskable" },
+      ]
+    : [
+        { src: "/icon-192x192.png", sizes: "192x192", type: "image/png", purpose: "any" },
+        { src: "/icon-512x512.png", sizes: "512x512", type: "image/png", purpose: "any" },
+        { src: "/icon-maskable-light-192x192.png", sizes: "192x192", type: "image/png", purpose: "maskable" },
+        { src: "/icon-maskable-light-512x512.png", sizes: "512x512", type: "image/png", purpose: "maskable" },
+        { src: "/icon-maskable-dark-192x192.png", sizes: "192x192", type: "image/png", purpose: "maskable" },
+        { src: "/icon-maskable-dark-512x512.png", sizes: "512x512", type: "image/png", purpose: "maskable" },
+      ];
+
+  return {
+    name: appName,
+    short_name: shortName,
+    description,
+    start_url: "/",
+    scope: "/",
+    display: "standalone",
+    orientation: "portrait-primary",
+    theme_color: themeColor,
+    background_color: backgroundColor,
+    icons,
+    categories: ["productivity"],
+    screenshots: [
+      { src: "/screenshot-540x720.png", sizes: "540x720", type: "image/png" },
+      { src: "/screenshot-1280x720.png", sizes: "1280x720", type: "image/png" },
+    ],
+  };
+}

components/calendar/calendar-agenda-view.tsx

@@ -2,11 +2,11 @@
 
 import { useMemo, useRef, useEffect, useCallback } from "react";
 import { useTranslations, useFormatter } from "next-intl";
-import { format, parseISO, isToday, isTomorrow, startOfDay } from "date-fns";
+import { format, isToday, isTomorrow, startOfDay } from "date-fns";
 import { MapPin, Users } from "lucide-react";
 import { cn } from "@/lib/utils";
 import { parseDuration, getEventColor } from "./event-card";
-import { getEventDayBounds, getPrimaryCalendarId } from "@/lib/calendar-utils";
+import { getEventDayBounds, getEventEndDate, getEventStartDate, getPrimaryCalendarId } from "@/lib/calendar-utils";
 import { getParticipantCount } from "@/lib/calendar-participants";
 import type { CalendarEvent, Calendar } from "@/lib/jmap/types";
 
@@ -49,7 +49,7 @@ export function CalendarAgendaView({
 
   const grouped = useMemo(() => {
     const sorted = [...events].sort((a, b) =>
-      parseISO(a.start).getTime() - parseISO(b.start).getTime()
+      getEventStartDate(a).getTime() - getEventStartDate(b).getTime()
     );
 
     const groups: DayGroup[] = [];
@@ -144,9 +144,9 @@ export function CalendarAgendaView({
               const calId = getPrimaryCalendarId(ev);
               const calendar = calId ? calendarMap.get(calId) : undefined;
               const color = getEventColor(ev, calendar);
-              const start = parseISO(ev.start);
+              const start = getEventStartDate(ev);
               const durMin = parseDuration(ev.duration);
-              const end = new Date(start.getTime() + durMin * 60000);
+              const end = getEventEndDate(ev);
               const locationName = ev.locations
                 ? Object.values(ev.locations)[0]?.name
                 : null;

components/calendar/calendar-day-view.tsx

@@ -5,9 +5,9 @@ import { useTranslations, useFormatter } from "next-intl";
 import { format, isSameDay, isToday, parseISO } from "date-fns";
 import { cn } from "@/lib/utils";
 import { Check } from "lucide-react";
-import { EventCard, parseDuration } from "./event-card";
+import { EventCard } from "./event-card";
 import { QuickEventInput } from "./quick-event-input";
-import { formatSnapTime, getEventDayBounds, getPrimaryCalendarId, layoutOverlappingEvents } from "@/lib/calendar-utils";
+import { formatSnapTime, getEventDayBounds, getPrimaryCalendarId, isTimedEventFullDayOnDate, layoutOverlappingEvents } from "@/lib/calendar-utils";
 import type { CalendarEvent, Calendar, CalendarTask } from "@/lib/jmap/types";
 import { useTimeGridInteractions } from "@/hooks/use-time-grid-interactions";
 import type { PendingEventPreview } from "./event-modal";
@@ -66,7 +66,7 @@ export function CalendarDayView({
         const spansThisDay = startDay.getTime() <= selDay.getTime() && endDay.getTime() >= selDay.getTime();
         if (!spansThisDay) return;
 
-        if (ev.showWithoutTime) allDay.push(ev);
+        if (ev.showWithoutTime || isTimedEventFullDayOnDate(ev, selectedDate)) allDay.push(ev);
         else timed.push(ev);
       } catch { /* skip invalid dates */ }
     });
@@ -127,10 +127,10 @@ export function CalendarDayView({
     return format(new Date(2000, 0, 1, h), "HH:mm");
   };
 
-  const layouted = useMemo(() => layoutOverlappingEvents(timedEvents), [timedEvents]);
+  const layouted = useMemo(() => layoutOverlappingEvents(timedEvents, selectedDate), [timedEvents, selectedDate]);
 
   return (
-    <div className="flex flex-col flex-1 overflow-hidden" role="grid" aria-label={intlFormatter.dateTime(selectedDate, { weekday: "long", month: "long", day: "numeric", year: "numeric" })}>
+    <div className="flex min-h-0 flex-col flex-1 overflow-hidden" role="grid" aria-label={intlFormatter.dateTime(selectedDate, { weekday: "long", month: "long", day: "numeric", year: "numeric" })}>
       <div className={cn("px-4 py-3 border-b border-border", isMobile && "px-3 py-2")}>
         <h3 className={cn("font-semibold", isMobile ? "text-base" : "text-lg", today && "text-primary")}>
           {isMobile
@@ -200,7 +200,7 @@ export function CalendarDayView({
         </div>
       )}
 
-      <div ref={scrollRef} className="flex-1 overflow-y-auto">
+      <div ref={scrollRef} className="min-h-0 flex-1 overflow-y-auto">
         <div className="flex relative" style={{ height: 24 * HOUR_HEIGHT }}>
           <div className={cn("flex-shrink-0", isMobile ? "w-10" : "w-16")}>
             {HOURS.map((h) => (
@@ -241,11 +241,9 @@ export function CalendarDayView({
               />
             ))}
 
-            {layouted.map(({ event: ev, column, totalColumns }) => {
-              const start = parseISO(ev.start);
-              const startMin = start.getHours() * 60 + start.getMinutes();
-              const durMin = Math.max(15, parseDuration(ev.duration));
-              const top = (startMin / 60) * HOUR_HEIGHT;
+            {layouted.map(({ event: ev, column, totalColumns, startMinutes, endMinutes }) => {
+              const durMin = Math.max(15, endMinutes - startMinutes);
+              const top = (startMinutes / 60) * HOUR_HEIGHT;
               const baseHeight = Math.max(24, (durMin / 60) * HOUR_HEIGHT);
               const height = resizeVisual?.eventId === ev.id ? resizeVisual.heightPx : baseHeight;
               const calId = getPrimaryCalendarId(ev);

components/calendar/calendar-sidebar-panel.tsx

@@ -2,13 +2,14 @@
 
 import { useState, useRef, useEffect, useMemo } from "react";
 import { useTranslations } from "next-intl";
-import { Globe, ListTodo, RefreshCw, Share2, Trash2 } from "lucide-react";
+import { Globe, ListTodo, Pencil, RefreshCw, Share2, Trash2, Cake } from "lucide-react";
 import { cn, formatDateTime } from "@/lib/utils";
 import type { Calendar } from "@/lib/jmap/types";
 import { CalendarColorPicker } from "@/components/settings/calendar-management-settings";
 import { useCalendarStore } from "@/stores/calendar-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { useTaskStore } from "@/stores/task-store";
+import { BIRTHDAY_CALENDAR_ID } from "@/lib/birthday-calendar";
 import { toast } from "@/stores/toast-store";
 import type { IJMAPClient } from '@/lib/jmap/client-interface';
 
@@ -18,6 +19,7 @@ interface CalendarSidebarPanelProps {
   onToggleVisibility: (id: string) => void;
   onColorChange?: (calendarId: string, color: string) => void;
   onSubscribe?: () => void;
+  onEditSubscription?: (subscriptionId: string) => void;
   client?: IJMAPClient | null;
 }
 
@@ -27,6 +29,7 @@ export function CalendarSidebarPanel({
   onToggleVisibility,
   onColorChange,
   onSubscribe,
+  onEditSubscription,
   client,
 }: CalendarSidebarPanelProps) {
   const t = useTranslations("calendar");
@@ -162,6 +165,9 @@ export function CalendarSidebarPanel({
               )}
             </>
           )}
+          {cal.id === BIRTHDAY_CALENDAR_ID && (
+            <Cake className="w-3 h-3 text-muted-foreground flex-shrink-0" />
+          )}
         </button>
 
         {/* Subscription context menu on right-click */}
@@ -173,6 +179,16 @@ export function CalendarSidebarPanel({
               ref={contextMenuRef}
               className="absolute left-6 top-full mt-1 z-50 bg-background border border-border rounded-lg shadow-lg py-1 w-48"
             >
+              <button
+                onClick={() => {
+                  setContextMenuCalId(null);
+                  onEditSubscription?.(sub.id);
+                }}
+                className="flex items-center gap-2 w-full px-3 py-1.5 text-sm hover:bg-muted transition-colors"
+              >
+                <Pencil className="w-3.5 h-3.5" />
+                {tSub('edit')}
+              </button>
               <button
                 onClick={() => handleRefreshSubscription(sub.id)}
                 className="flex items-center gap-2 w-full px-3 py-1.5 text-sm hover:bg-muted transition-colors"

components/calendar/calendar-week-view.tsx

@@ -7,9 +7,9 @@ import {
 } from "date-fns";
 import { cn } from "@/lib/utils";
 import { Check } from "lucide-react";
-import { EventCard, parseDuration } from "./event-card";
+import { EventCard } from "./event-card";
 import { QuickEventInput } from "./quick-event-input";
-import { buildWeekSegments, formatSnapTime, getEventDayBounds, getPrimaryCalendarId, layoutOverlappingEvents } from "@/lib/calendar-utils";
+import { buildTimedFullDayWeekSegments, buildWeekSegmentsRaw, formatSnapTime, getEventDayBounds, getPrimaryCalendarId, isTimedEventFullDayOnDate, layoutOverlappingEvents, packWeekSegments } from "@/lib/calendar-utils";
 import type { CalendarEvent, Calendar, CalendarTask } from "@/lib/jmap/types";
 import { useTimeGridInteractions } from "@/hooks/use-time-grid-interactions";
 import type { PendingEventPreview } from "./event-modal";
@@ -77,7 +77,7 @@ export function CalendarWeekView({
         const cursor = new Date(startDay);
         while (cursor <= endDay) {
           const key = format(cursor, "yyyy-MM-dd");
-          if (!ev.showWithoutTime) {
+          if (!ev.showWithoutTime && !isTimedEventFullDayOnDate(ev, cursor)) {
             const arr = timed.get(key) || [];
             arr.push(ev);
             timed.set(key, arr);
@@ -89,10 +89,18 @@ export function CalendarWeekView({
     return timed;
   }, [events]);
 
-  const allDaySegments = useMemo(() => buildWeekSegments(
+  const allDaySegments = useMemo(() => {
+    const explicitAllDay = buildWeekSegmentsRaw(
       events.filter((event) => event.showWithoutTime),
       weekDays,
-  ), [events, weekDays]);
+    );
+    const timedFullDay = buildTimedFullDayWeekSegments(
+      events.filter((event) => !event.showWithoutTime),
+      weekDays,
+    );
+
+    return packWeekSegments([...explicitAllDay, ...timedFullDay]);
+  }, [events, weekDays]);
 
   const allDayRowCount = useMemo(() => {
     return allDaySegments.reduce((maxRows, segment) => Math.max(maxRows, segment.row + 1), 0);
@@ -189,13 +197,13 @@ export function CalendarWeekView({
     <div
       ref={rootRef}
       className={cn(
-        "flex flex-col flex-1",
+        "flex min-h-0 min-w-0 flex-col flex-1",
         isMobile ? "overflow-x-auto overflow-y-hidden" : "overflow-hidden"
       )}
       role="grid"
       aria-label={t("views.week")}
     >
-      <div className={cn("flex flex-col flex-1", isMobile && "min-w-[880px]")}>      {hasAllDay && (
+      <div className={cn("flex min-h-0 flex-col flex-1", isMobile && "min-w-[880px]")}>      {hasAllDay && (
         <div className="flex border-b border-border">
           <div
             className={cn("flex-shrink-0 text-[10px] text-muted-foreground p-1 text-right", isMobile ? "w-10 sticky left-0 z-10 bg-background" : "w-14")}
@@ -321,7 +329,7 @@ export function CalendarWeekView({
         </div>
       </div>
 
-      <div ref={scrollRef} className="flex-1 overflow-y-auto">
+      <div ref={scrollRef} className="min-h-0 flex-1 overflow-y-auto">
         <div className="flex relative" style={{ height: 24 * HOUR_HEIGHT }}>
           <div className={cn("flex-shrink-0", isMobile ? "w-10 sticky left-0 z-10 bg-background" : "w-14")}>
             {HOURS.map((h) => (
@@ -344,7 +352,7 @@ export function CalendarWeekView({
               const key = format(day, "yyyy-MM-dd");
               const dayEvents = timedEvents.get(key) || [];
               const todayCol = isToday(day);
-              const layouted = layoutOverlappingEvents(dayEvents);
+              const layouted = layoutOverlappingEvents(dayEvents, day);
 
               return (
                 <div
@@ -371,11 +379,9 @@ export function CalendarWeekView({
                     />
                   ))}
 
-                  {layouted.map(({ event: ev, column, totalColumns }) => {
-                    const start = parseISO(ev.start);
-                    const startMin = start.getHours() * 60 + start.getMinutes();
-                    const durMin = Math.max(15, parseDuration(ev.duration));
-                    const top = (startMin / 60) * HOUR_HEIGHT;
+                  {layouted.map(({ event: ev, column, totalColumns, startMinutes, endMinutes }) => {
+                    const durMin = Math.max(15, endMinutes - startMinutes);
+                    const top = (startMinutes / 60) * HOUR_HEIGHT;
                     const baseHeight = Math.max(20, (durMin / 60) * HOUR_HEIGHT);
                     const height = resizeVisual?.eventId === ev.id ? resizeVisual.heightPx : baseHeight;
                     const calId = getPrimaryCalendarId(ev);

components/calendar/event-card.tsx

@@ -4,9 +4,10 @@ import { useCallback, useState, type CSSProperties, type DragEvent } from "react
 import { useTranslations } from "next-intl";
 import { cn } from "@/lib/utils";
 import type { CalendarEvent, Calendar } from "@/lib/jmap/types";
-import { format, parseISO } from "date-fns";
+import { format } from "date-fns";
 import { Users } from "lucide-react";
 import { getParticipantCount } from "@/lib/calendar-participants";
+import { getEventEndDate, getEventStartDate } from "@/lib/calendar-utils";
 import { useSettingsStore } from "@/stores/settings-store";
 
 interface EventCardProps {
@@ -68,14 +69,14 @@ export function EventCard({ event, calendar, variant, onClick, onMouseEnter, onM
   const t = useTranslations("calendar");
   const [isBeingDragged, setIsBeingDragged] = useState(false);
   const color = getEventColor(event, calendar);
-  const startDate = parseISO(event.start);
+  const startDate = getEventStartDate(event);
   const timeFormat = useSettingsStore((state) => state.timeFormat);
   const showTimeInMonthView = useSettingsStore((state) => state.showTimeInMonthView);
   const timeFmt = timeFormat === "12h" ? "h:mm a" : "HH:mm";
 
   const calendarName = calendar?.name || "";
   const durationMinutes = parseDuration(event.duration);
-  const endTime = new Date(startDate.getTime() + durationMinutes * 60000);
+  const endTime = getEventEndDate(event);
   const timeString = `${format(startDate, timeFmt)} – ${format(endTime, timeFmt)}`;
   const ariaLabel = `${event.title || t("events.no_title")}, ${timeString}${calendarName ? `, ${calendarName}` : ""}`;
 

components/calendar/event-detail-popover.tsx

@@ -12,6 +12,7 @@ import { format, parseISO } from "date-fns";
 import { cn } from "@/lib/utils";
 import type { CalendarEvent, Calendar, CalendarParticipant } from "@/lib/jmap/types";
 import { parseDuration, getEventColor } from "./event-card";
+import { getEventEndDate, getEventStartDate } from "@/lib/calendar-utils";
 import {
   isOrganizer,
   getUserParticipantId,
@@ -87,7 +88,7 @@ function formatDurationDisplay(minutes: number): string {
 function getAlertLabel(event: CalendarEvent, t: ReturnType<typeof useTranslations>): string | null {
   if (!event.alerts) return null;
   const first = Object.values(event.alerts)[0];
-  if (!first || first.trigger["@type"] !== "OffsetTrigger") return null;
+  if (!first || !first.trigger || first.trigger["@type"] !== "OffsetTrigger") return null;
   const offset = first.trigger.offset;
   if (offset === "PT0S") return t("alerts.at_time");
   const minMatch = offset.match(/-?PT?(\d+)M$/);
@@ -138,9 +139,9 @@ export function EventDetailPopover({
   const [isSavingNote, setIsSavingNote] = useState(false);
 
   const color = getEventColor(event, calendar);
-  const startDate = parseISO(event.start);
+  const startDate = getEventStartDate(event);
   const durationMinutes = parseDuration(event.duration);
-  const endDate = new Date(startDate.getTime() + durationMinutes * 60000);
+  const endDate = getEventEndDate(event);
 
   const locationName = useMemo(() => {
     if (!event.locations) return null;

components/calendar/event-modal.tsx

@@ -8,7 +8,7 @@ import { X, Trash2, Check, Users, CalendarDays, Copy, Pencil, Clock, MapPin, Vid
 import { format, parseISO, addHours, addDays } from "date-fns";
 import type { CalendarEvent, Calendar, CalendarParticipant } from "@/lib/jmap/types";
 import { parseDuration, getEventColor } from "./event-card";
-import { buildAllDayDuration, getEventDisplayEndDate, getPrimaryCalendarId } from "@/lib/calendar-utils";
+import { buildAllDayDuration, getEventDisplayEndDate, getEventEndDate, getEventStartDate, getPrimaryCalendarId } from "@/lib/calendar-utils";
 import { ParticipantInput } from "./participant-input";
 import {
   isOrganizer,
@@ -18,7 +18,9 @@ import {
   getStatusCounts,
   buildParticipantMap,
 } from "@/lib/calendar-participants";
+import { PluginSlot } from "@/components/plugins/plugin-slot";
 import { useSettingsStore } from "@/stores/settings-store";
+import { generateUUID } from "@/lib/utils";
 
 export interface PendingEventPreview {
   start: Date;
@@ -159,7 +161,7 @@ export function EventModal({
   }, [event, existingParticipants]);
 
   const getInitialStart = (): Date => {
-    if (event?.start) return parseISO(event.start);
+    if (event?.start) return getEventStartDate(event);
     if (defaultDate) {
       const d = new Date(defaultDate);
       if (defaultEndDate) return d;
@@ -177,9 +179,7 @@ export function EventModal({
       if (event.showWithoutTime) {
         return getEventDisplayEndDate(event);
       }
-      const s = parseISO(event.start);
-      const dur = parseDuration(event.duration);
-      return new Date(s.getTime() + dur * 60000);
+      return getEventEndDate(event);
     }
     if (defaultEndDate) return new Date(defaultEndDate);
     return addHours(getInitialStart(), 1);
@@ -190,6 +190,9 @@ export function EventModal({
   const [location, setLocation] = useState(
     event?.locations ? Object.values(event.locations)[0]?.name || "" : ""
   );
+  const [virtualLocation, setVirtualLocation] = useState(
+    event?.virtualLocations ? Object.values(event.virtualLocations)[0]?.uri || "" : ""
+  );
   const [startDate, setStartDate] = useState(formatDateInput(getInitialStart()));
   const [startTime, setStartTime] = useState(formatTimeInput(getInitialStart()));
   const [endDate, setEndDate] = useState(formatDateInput(getInitialEnd()));
@@ -315,6 +318,20 @@ export function EventModal({
       data.locations = null;
     }
 
+    if (virtualLocation.trim()) {
+      data.virtualLocations = {
+        vl1: {
+          "@type": "VirtualLocation",
+          name: null,
+          description: null,
+          uri: virtualLocation.trim(),
+          features: null,
+        },
+      };
+    } else if (event && event.virtualLocations && Object.keys(event.virtualLocations).length > 0) {
+      data.virtualLocations = null;
+    }
+
     if (recurrence !== "none") {
       data.recurrenceRules = [{
         "@type": "RecurrenceRule",
@@ -363,8 +380,10 @@ export function EventModal({
         { name: organizerName, email: organizerEmail },
         attendees
       ) as Record<string, CalendarParticipant>;
+      data.replyTo = { imip: `mailto:${organizerEmail}` };
     } else if (attendees.length === 0 && event?.participants) {
       data.participants = null;
+      data.replyTo = null;
     }
 
     const shouldSendScheduling = attendees.length > 0 && sendInvitations;
@@ -374,7 +393,7 @@ export function EventModal({
     } finally {
       setIsSaving(false);
     }
-  }, [title, description, location, startDate, startTime, endDate, endTime, allDay, calendarId, recurrence, alert, attendees, sendInvitations, currentUserEmails, existingParticipants, event, onSave, isSaving]);
+  }, [title, description, location, virtualLocation, startDate, startTime, endDate, endTime, allDay, calendarId, recurrence, alert, attendees, sendInvitations, currentUserEmails, existingParticipants, event, onSave, isSaving]);
 
   const handleRsvp = useCallback((status: CalendarParticipant['participationStatus']) => {
     if (!event || !userParticipantId || !onRsvp) return;
@@ -384,11 +403,9 @@ export function EventModal({
 
   const handleDuplicate = useCallback(() => {
     if (!event || !onDuplicate) return;
-    const start = parseISO(event.start);
+    const start = getEventStartDate(event);
     const newStart = addDays(start, 1);
-    const newUid = typeof crypto !== 'undefined' && crypto.randomUUID
-      ? crypto.randomUUID()
-      : `${Date.now()}-${Math.random().toString(36).slice(2, 11)}`;
+    const newUid = generateUUID();
     const data: Partial<CalendarEvent> = {
       uid: newUid,
       title: event.title,
@@ -403,6 +420,7 @@ export function EventModal({
       privacy: event.privacy,
     };
     if (event.locations) data.locations = structuredClone(event.locations);
+    if (event.virtualLocations) data.virtualLocations = structuredClone(event.virtualLocations);
     if (event.recurrenceRules) data.recurrenceRules = structuredClone(event.recurrenceRules);
     if (event.alerts) data.alerts = structuredClone(event.alerts);
     if (event.participants) data.participants = structuredClone(event.participants);
@@ -456,9 +474,9 @@ export function EventModal({
   const hasParticipants = attendees.length > 0 || (event?.participants && Object.keys(event.participants).length > 0);
 
   if (isAttendeeMode && event) {
-    const startD = parseISO(event.start);
+    const startD = getEventStartDate(event);
     const durMin = parseDuration(event.duration);
-    const endD = new Date(startD.getTime() + durMin * 60000);
+    const endD = getEventEndDate(event);
     const locationName = event.locations ? Object.values(event.locations)[0]?.name : null;
     const participants = getParticipantList(event);
 
@@ -567,9 +585,9 @@ export function EventModal({
 
   // View mode: read-only display of event details with Edit button
   if (mode === "view" && event) {
-    const startD = parseISO(event.start);
+    const startD = getEventStartDate(event);
     const durMin = parseDuration(event.duration);
-    const endD = new Date(startD.getTime() + durMin * 60000);
+    const endD = getEventEndDate(event);
     const locationName = event.locations ? Object.values(event.locations)[0]?.name || null : null;
     const virtualLoc = event.virtualLocations ? Object.values(event.virtualLocations)[0]?.uri || null : null;
     const viewParticipants = getParticipantList(event);
@@ -780,6 +798,39 @@ export function EventModal({
             />
           </div>
 
+          <div>
+            <label className="text-sm font-medium mb-1 block">
+              <span className="flex items-center gap-1.5">
+                <Video className="w-4 h-4" />
+                {t("form.meeting_link")}
+              </span>
+            </label>
+            <Input
+              type="url"
+              value={virtualLocation}
+              onChange={(e) => setVirtualLocation(e.target.value)}
+              placeholder="https://meet.example.com/..."
+              maxLength={2000}
+            />
+            <PluginSlot
+              name="calendar-event-actions"
+              className="mt-2 flex flex-wrap gap-2"
+              extraProps={{
+                eventData: {
+                  title,
+                  description,
+                  start: startDate + 'T' + startTime,
+                  end: endDate + 'T' + endTime,
+                  isAllDay: allDay,
+                  location,
+                  virtualLocation,
+                  calendarId,
+                },
+                setVirtualLocation,
+              }}
+            />
+          </div>
+
           <div>
             <label className="text-sm font-medium mb-1 block">
               <span className="flex items-center gap-1.5">

components/calendar/ical-import-modal.tsx

@@ -7,9 +7,11 @@ import { X, Upload, Check, Loader2, RefreshCw, Globe } from "lucide-react";
 import { format, parseISO } from "date-fns";
 import type { CalendarEvent, Calendar } from "@/lib/jmap/types";
 import type { IJMAPClient } from '@/lib/jmap/client-interface';
+import { getEventStartDate } from "@/lib/calendar-utils";
 import { useCalendarStore } from "@/stores/calendar-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { toast } from "@/stores/toast-store";
+import { apiFetch } from "@/lib/browser-navigation";
 
 interface ICalImportModalProps {
   calendars: Calendar[];
@@ -17,7 +19,7 @@ interface ICalImportModalProps {
   onClose: () => void;
 }
 
-const MAX_FILE_SIZE = 5 * 1024 * 1024; // 5MB
+const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10MB
 const ACCEPTED_EXTENSIONS = [".ics", ".ical"];
 
 type ImportStep = "select" | "preview" | "importing";
@@ -125,7 +127,7 @@ export function ICalImportModal({ calendars, client, onClose }: ICalImportModalP
     setIsParsing(true);
 
     try {
-      const response = await fetch("/api/fetch-ical", {
+      const response = await apiFetch("/api/fetch-ical", {
         method: "POST",
         headers: { "Content-Type": "application/json" },
         body: JSON.stringify({ url: trimmed }),
@@ -195,7 +197,7 @@ export function ICalImportModal({ calendars, client, onClose }: ICalImportModalP
   const formatEventDate = (event: Partial<CalendarEvent>): string => {
     if (!event.start) return "";
     try {
-      const date = parseISO(event.start);
+      const date = getEventStartDate(event as CalendarEvent);
       const timeFmt = timeFormat === "12h" ? "h:mm a" : "HH:mm";
       return event.showWithoutTime
         ? format(date, "MMM d, yyyy")

components/calendar/ical-subscription-modal.tsx

@@ -5,24 +5,28 @@ import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
 import { X, Loader2, Globe } from "lucide-react";
 import type { IJMAPClient } from '@/lib/jmap/client-interface';
-import { useCalendarStore } from "@/stores/calendar-store";
+import { useCalendarStore, type ICalSubscription } from "@/stores/calendar-store";
 import { CalendarColorPicker } from "@/components/settings/calendar-management-settings";
 import { toast } from "@/stores/toast-store";
 
 interface ICalSubscriptionModalProps {
   client: IJMAPClient;
   onClose: () => void;
+  editSubscription?: ICalSubscription;
 }
 
-export function ICalSubscriptionModal({ client, onClose }: ICalSubscriptionModalProps) {
+export function ICalSubscriptionModal({ client, onClose, editSubscription }: ICalSubscriptionModalProps) {
   const t = useTranslations("calendar.subscription");
   const tCommon = useTranslations("common");
   const addICalSubscription = useCalendarStore((s) => s.addICalSubscription);
+  const updateICalSubscription = useCalendarStore((s) => s.updateICalSubscription);
 
-  const [url, setUrl] = useState("");
-  const [name, setName] = useState("");
-  const [color, setColor] = useState("#3b82f6");
-  const [refreshInterval, setRefreshInterval] = useState(60);
+  const isEdit = !!editSubscription;
+
+  const [url, setUrl] = useState(editSubscription?.url || "");
+  const [name, setName] = useState(editSubscription?.name || "");
+  const [color, setColor] = useState(editSubscription?.color || "#3b82f6");
+  const [refreshInterval, setRefreshInterval] = useState(editSubscription?.refreshInterval || 60);
   const [isSubmitting, setIsSubmitting] = useState(false);
   const [error, setError] = useState<string | null>(null);
   const modalRef = useRef<HTMLDivElement>(null);
@@ -49,6 +53,16 @@ export function ICalSubscriptionModal({ client, onClose }: ICalSubscriptionModal
     setIsSubmitting(true);
 
     try {
+      if (isEdit && editSubscription) {
+        const updates: { url?: string; name?: string; color?: string; refreshInterval?: number } = {};
+        if (trimmedUrl !== editSubscription.url) updates.url = trimmedUrl;
+        if (name.trim() !== editSubscription.name) updates.name = name.trim();
+        if (color !== editSubscription.color) updates.color = color;
+        if (refreshInterval !== editSubscription.refreshInterval) updates.refreshInterval = refreshInterval;
+        await updateICalSubscription(client, editSubscription.id, updates);
+        toast.success(t("updated", { name: name.trim() }));
+        onClose();
+      } else {
         const subscription = await addICalSubscription(client, trimmedUrl, name.trim(), color, refreshInterval);
         if (subscription) {
           toast.success(t("success", { name: name.trim() }));
@@ -56,8 +70,9 @@ export function ICalSubscriptionModal({ client, onClose }: ICalSubscriptionModal
         } else {
           setError(t("error"));
         }
+      }
     } catch {
-      setError(t("error"));
+      setError(isEdit ? t("update_error") : t("error"));
     } finally {
       setIsSubmitting(false);
     }
@@ -108,7 +123,7 @@ export function ICalSubscriptionModal({ client, onClose }: ICalSubscriptionModal
         <div className="flex items-center justify-between px-6 py-4 border-b border-border">
           <div className="flex items-center gap-2">
             <Globe className="w-5 h-5 text-primary" />
-            <h2 className="text-lg font-semibold">{t("title")}</h2>
+            <h2 className="text-lg font-semibold">{isEdit ? t("edit_title") : t("title")}</h2>
           </div>
           <button
             onClick={onClose}
@@ -192,10 +207,10 @@ export function ICalSubscriptionModal({ client, onClose }: ICalSubscriptionModal
             {isSubmitting ? (
               <>
                 <Loader2 className="w-4 h-4 animate-spin mr-2" />
-                {t("subscribing")}
+                {isEdit ? t("saving") : t("subscribing")}
               </>
             ) : (
-              t("subscribe")
+              isEdit ? t("save") : t("subscribe")
             )}
           </Button>
         </div>

components/calendar/mini-calendar.tsx

@@ -7,9 +7,10 @@ import {
   startOfMonth, endOfMonth, startOfWeek, endOfWeek,
   addMonths, subMonths, addYears, subYears, setMonth, setYear,
   eachDayOfInterval, getMonth, getYear, getISOWeek, getWeek,
-  isSameDay, isSameMonth, isToday, format, parseISO,
+  isSameDay, isSameMonth, isToday, format,
 } from "date-fns";
 import { cn } from "@/lib/utils";
+import { getEventDayBounds } from "@/lib/calendar-utils";
 import type { CalendarEvent } from "@/lib/jmap/types";
 
 type PickerView = "days" | "months" | "years";
@@ -54,7 +55,14 @@ export function MiniCalendar({
   const eventDates = useMemo(() => {
     const set = new Set<string>();
     events.forEach(e => {
-      try { set.add(format(parseISO(e.start), "yyyy-MM-dd")); } catch { /* skip */ }
+      try {
+        const { startDay, endDay } = getEventDayBounds(e);
+        const cursor = new Date(startDay);
+        while (cursor <= endDay) {
+          set.add(format(cursor, "yyyy-MM-dd"));
+          cursor.setDate(cursor.getDate() + 1);
+        }
+      } catch { /* skip */ }
     });
     return set;
   }, [events]);

components/contacts/contact-detail.tsx

@@ -87,7 +87,7 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
         try {
           let derBytes: ArrayBuffer | string | null = null;
           if (key.uri.startsWith('data:')) {
-            // data URI — extract base64 content
+            // data URI - extract base64 content
             const commaIdx = key.uri.indexOf(',');
             if (commaIdx === -1) continue;
             const b64 = key.uri.substring(commaIdx + 1);
@@ -178,7 +178,7 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
           <div className="flex items-center gap-4">
             <Avatar name={name} email={email} size={isMobile ? "md" : "lg"} />
             <div className="min-w-0 flex-1">
-              <h2 className={cn("font-semibold truncate", isMobile ? "text-lg" : "text-xl")}>{name || "—"}</h2>
+              <h2 className={cn("font-semibold truncate", isMobile ? "text-lg" : "text-xl")}>{name || "-"}</h2>
               {hasNickname && (
                 <p className="text-sm text-muted-foreground truncate">&ldquo;{nicknames.map(n => n.name).join(", ")}&rdquo;</p>
               )}
@@ -278,7 +278,7 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
                 <div key={i} className="text-sm">
                   {o.name}
                   {o.units && o.units.length > 0 && (
-                    <span className="text-muted-foreground"> — {o.units.map(u => u.name).join(", ")}</span>
+                    <span className="text-muted-foreground"> - {o.units.map(u => u.name).join(", ")}</span>
                   )}
                 </div>
               ))}
@@ -371,7 +371,7 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
                 {contact.speakToAs.pronouns && (() => {
                   const firstPronoun = Object.values(contact.speakToAs!.pronouns!)[0]?.pronouns;
                   return firstPronoun ? (
-                    <span className="text-muted-foreground">{contact.speakToAs!.grammaticalGender ? " — " : ""}{firstPronoun}</span>
+                    <span className="text-muted-foreground">{contact.speakToAs!.grammaticalGender ? " - " : ""}{firstPronoun}</span>
                   ) : null;
                 })()}
               </div>

components/contacts/contact-form.tsx

@@ -304,11 +304,8 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
     if (contact?.addressBookIds) {
       const ids = Object.keys(contact.addressBookIds).filter(k => contact.addressBookIds[k]);
       if (ids.length > 0) {
-        // For shared contacts, the addressBookIds uses the original (non-namespaced) id
-        // but we need the namespaced id to match addressBooks entries
-        if (contact.isShared && contact.accountId) {
-          return `${contact.accountId}:${ids[0]}`;
-        }
+        // addressBookIds are already namespaced for shared contacts (e.g. "accountId:bookId")
+        // so we can use them directly to match addressBook entries
         return ids[0];
       }
     }
@@ -510,7 +507,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
             </div>
           )}
 
-          {/* Name & Identity — full width */}
+          {/* Name & Identity - full width */}
           <div className="md:col-span-2 xl:col-span-3">
           <FormSection icon={User} title={t("section_identity")} category="contact">
             <div className="grid grid-cols-[auto_1fr_1fr_auto] gap-2">
@@ -578,7 +575,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
                         setEmails(next);
                       }}
                     >
-                      <option value="">—</option>
+                      <option value="">-</option>
                       <option value="work">{t("context_work")}</option>
                       <option value="private">{t("context_private")}</option>
                     </Select>
@@ -642,7 +639,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
                       setPhones(next);
                     }}
                   >
-                    <option value="">—</option>
+                    <option value="">-</option>
                     <option value="work">{t("context_work")}</option>
                     <option value="private">{t("context_private")}</option>
                   </Select>
@@ -680,7 +677,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
             </div>
           </FormSection>
 
-          {/* Addresses — full width */}
+          {/* Addresses - full width */}
           <div className="md:col-span-2 xl:col-span-3">
           <FormSection icon={MapPin} title={t("addresses")} collapsible defaultOpen category="location">
             <div className="space-y-3">
@@ -701,7 +698,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
                       value={addr.context}
                       onChange={(e) => { const n = [...addresses]; n[i] = { ...n[i], context: e.target.value as AddressEntry["context"] }; setAddresses(n); }}
                     >
-                      <option value="">—</option>
+                      <option value="">-</option>
                       <option value="work">{t("context_work")}</option>
                       <option value="private">{t("context_private")}</option>
                     </Select>
@@ -836,7 +833,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
               <div>
                 <label className="text-xs text-muted-foreground mb-1 block">{t("gender_sex")}</label>
                 <Select value={genderSex} onChange={(e) => setGenderSex(e.target.value)} className="w-full">
-                  <option value="">—</option>
+                  <option value="">-</option>
                   <option value="masculine">{t("gender_male")}</option>
                   <option value="feminine">{t("gender_female")}</option>
                   <option value="other">{t("gender_other")}</option>
@@ -869,7 +866,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
             </div>
           </FormSection>
 
-          {/* Notes — full width */}
+          {/* Notes - full width */}
           <div className="md:col-span-2 xl:col-span-3">
           <FormSection icon={StickyNote} title={t("note")} collapsible defaultOpen category="notes">
             <textarea
@@ -914,7 +911,6 @@ function CategoryComboBox({
 }) {
   const [isOpen, setIsOpen] = useState(false);
   const [inputValue, setInputValue] = useState("");
-  const wrapperRef = useRef<HTMLDivElement>(null);
   const inputRef = useRef<HTMLInputElement>(null);
 
   // Parse current keywords from comma-separated string
@@ -949,17 +945,6 @@ function CategoryComboBox({
     onChange(next);
   }, [currentKeywords, onChange]);
 
-  // Close dropdown on outside click
-  useEffect(() => {
-    if (!isOpen) return;
-    const handler = (e: MouseEvent) => {
-      if (wrapperRef.current && !wrapperRef.current.contains(e.target as Node)) {
-        setIsOpen(false);
-      }
-    };
-    document.addEventListener("mousedown", handler);
-    return () => document.removeEventListener("mousedown", handler);
-  }, [isOpen]);
 
   const handleKeyDown = (e: React.KeyboardEvent) => {
     if (e.key === "Enter") {
@@ -973,7 +958,7 @@ function CategoryComboBox({
   };
 
   return (
-    <div ref={wrapperRef} className="relative">
+    <div className="relative">
       {/* Keyword badges */}
       {currentKeywords.length > 0 && (
         <div className="flex flex-wrap gap-1.5 mb-2">
@@ -1001,6 +986,7 @@ function CategoryComboBox({
         value={inputValue}
         onChange={(e) => { setInputValue(e.target.value); setIsOpen(true); }}
         onFocus={() => setIsOpen(true)}
+        onBlur={() => setIsOpen(false)}
         onKeyDown={handleKeyDown}
         placeholder={currentKeywords.length === 0 ? placeholder : ""}
       />
@@ -1008,7 +994,7 @@ function CategoryComboBox({
 
       {/* Dropdown */}
       {isOpen && (suggestions.length > 0 || canAddNew) && (
-        <div className="absolute left-0 right-0 top-[calc(100%-1.5rem)] mt-1 rounded-md border border-border bg-popover text-popover-foreground shadow-md z-50 max-h-48 overflow-y-auto py-1">
+        <div className="absolute left-0 right-0 top-[calc(100%-1.5rem)] mt-1 rounded-md border border-border bg-popover text-popover-foreground shadow-md z-50 max-h-48 overflow-y-auto py-1" onMouseDown={(e) => e.preventDefault()}>
           {suggestions.map(kw => (
             <button
               key={kw}

components/contacts/contact-import-dialog.tsx

@@ -199,7 +199,7 @@ export function ContactImportDialog({
                     </div>
                     <FileText className="w-4 h-4 text-muted-foreground flex-shrink-0" />
                     <div className="flex-1 min-w-0">
-                      <div className="text-sm font-medium truncate">{cName || cEmail || "—"}</div>
+                      <div className="text-sm font-medium truncate">{cName || cEmail || "-"}</div>
                       {cEmail && cName && (
                         <div className="text-xs text-muted-foreground truncate">{cEmail}</div>
                       )}

components/contacts/contact-list-item.tsx

@@ -90,7 +90,7 @@ export function ContactListItem({ contact, isSelected, isChecked, hasSelection,
 
       <div className="flex-1 min-w-0">
         <div className="text-sm font-medium truncate">
-          {name || email || "—"}
+          {name || email || "-"}
         </div>
         {density !== 'extra-compact' && email && name && (
           <div className="text-xs text-muted-foreground truncate">{email}</div>

components/contacts/contacts-sidebar.tsx

@@ -2,7 +2,8 @@
 
 import { useMemo, useState, useCallback, useEffect, useRef, type DragEvent } from "react";
 import { useTranslations } from "next-intl";
-import { BookUser, Users, Plus, Share2, Book, ChevronRight, ChevronDown, UserPlus, UsersRound, Upload, Tag, Pencil, Trash2 } from "lucide-react";
+import { BookUser, Users, Plus, Share2, Book, ChevronRight, ChevronDown, UserPlus, UsersRound, Upload, Tag, Pencil, Trash2, Settings } from "lucide-react";
+import { useRouter } from "next/navigation";
 import { Button } from "@/components/ui/button";
 import { ContextMenu, ContextMenuItem, ContextMenuSeparator } from "@/components/ui/context-menu";
 import { useContextMenu } from "@/hooks/use-context-menu";
@@ -25,6 +26,8 @@ interface ContactsSidebarProps {
   onDeleteGroup?: (groupId: string) => void;
   onDropContacts?: (contactIds: string[], addressBook: AddressBook) => void;
   onDropContactsToCategory?: (contactIds: string[], keyword: string) => void;
+  onRenameAddressBook?: (addressBook: AddressBook) => void;
+  onRenameKeyword?: (keyword: string) => void;
   className?: string;
 }
 
@@ -58,10 +61,15 @@ export function ContactsSidebar({
   onDeleteGroup,
   onDropContacts,
   onDropContactsToCategory,
+  onRenameAddressBook,
+  onRenameKeyword,
   className,
 }: ContactsSidebarProps) {
   const t = useTranslations("contacts");
+  const router = useRouter();
   const { contextMenu: groupContextMenu, openContextMenu: openGroupContextMenu, closeContextMenu: closeGroupContextMenu, menuRef: groupMenuRef } = useContextMenu<ContactCard>();
+  const { contextMenu: bookContextMenu, openContextMenu: openBookContextMenu, closeContextMenu: closeBookContextMenu, menuRef: bookMenuRef } = useContextMenu<AddressBook>();
+  const { contextMenu: keywordContextMenu, openContextMenu: openKeywordContextMenu, closeContextMenu: closeKeywordContextMenu, menuRef: keywordMenuRef } = useContextMenu<string>();
 
   const [collapsed, setCollapsed] = useState<Record<string, boolean>>(loadCollapsed);
   const [showMenu, setShowMenu] = useState(false);
@@ -246,9 +254,10 @@ export function ContactsSidebar({
         {/* My Address Books */}
         {personalBooks.length > 0 && (
           <div className="mt-2">
+            <div className="flex items-center px-3 py-1 group">
               <button
                 onClick={() => toggleSection("addressBooks")}
-              className="flex items-center gap-1 px-3 py-1 w-full text-left group"
+                className="flex items-center gap-1 flex-1 text-left"
               >
                 {collapsed.addressBooks ? (
                   <ChevronRight className="w-3 h-3 text-muted-foreground" />
@@ -259,6 +268,18 @@ export function ContactsSidebar({
                   {t("address_books.title")}
                 </span>
               </button>
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  try { localStorage.setItem('settings-active-tab', 'contacts'); } catch { /* ignore */ }
+                  router.push('/settings');
+                }}
+                className="p-0.5 rounded opacity-0 group-hover:opacity-100 transition-opacity duration-150 hover:bg-muted"
+                title={t("address_books.manage")}
+              >
+                <Settings className="w-3 h-3 text-muted-foreground" />
+              </button>
+            </div>
             {!collapsed.addressBooks && personalBooks.map((book) => (
               <AddressBookItem
                 key={book.id}
@@ -267,6 +288,7 @@ export function ContactsSidebar({
                 contactCount={contactCountByBook[book.id] || 0}
                 onSelect={() => onSelectCategory({ addressBookId: book.id })}
                 onDropContacts={onDropContacts}
+                onContextMenu={onRenameAddressBook ? (e) => openBookContextMenu(e, book) : undefined}
               />
             ))}
           </div>
@@ -362,6 +384,7 @@ export function ContactsSidebar({
                     isActive={isActive}
                     onSelect={() => onSelectCategory({ keyword })}
                     onDropContacts={onDropContactsToCategory}
+                    onContextMenu={onRenameKeyword ? (e) => openKeywordContextMenu(e, keyword) : undefined}
                   />
                 );
               })}
@@ -372,9 +395,10 @@ export function ContactsSidebar({
         {/* Shared accounts with address books */}
         {sharedBookGroups.map((group) => (
           <div key={group.accountId} className="mt-2">
+            <div className="flex items-center px-3 py-1 group">
               <button
                 onClick={() => toggleSection(`shared-${group.accountId}`)}
-              className="flex items-center gap-1 px-3 py-1 w-full text-left group"
+                className="flex items-center gap-1 flex-1 min-w-0 text-left"
               >
                 {collapsed[`shared-${group.accountId}`] ? (
                   <ChevronRight className="w-3 h-3 text-muted-foreground" />
@@ -386,6 +410,18 @@ export function ContactsSidebar({
                   {t("address_books.shared_prefix", { name: group.accountName })}
                 </span>
               </button>
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  try { localStorage.setItem('settings-active-tab', 'contacts'); } catch { /* ignore */ }
+                  router.push('/settings');
+                }}
+                className="p-0.5 rounded opacity-0 group-hover:opacity-100 transition-opacity duration-150 hover:bg-muted"
+                title={t("address_books.manage")}
+              >
+                <Settings className="w-3 h-3 text-muted-foreground" />
+              </button>
+            </div>
             {!collapsed[`shared-${group.accountId}`] && group.books.map((book) => (
               <AddressBookItem
                 key={book.id}
@@ -394,12 +430,53 @@ export function ContactsSidebar({
                 contactCount={contactCountByBook[book.id] || 0}
                 onSelect={() => onSelectCategory({ addressBookId: book.id })}
                 onDropContacts={onDropContacts}
+                onContextMenu={onRenameAddressBook ? (e) => openBookContextMenu(e, book) : undefined}
               />
             ))}
           </div>
         ))}
       </div>
 
+      {/* Address book context menu */}
+      {bookContextMenu.data && onRenameAddressBook && (
+        <ContextMenu
+          ref={bookMenuRef}
+          isOpen={bookContextMenu.isOpen}
+          position={bookContextMenu.position}
+          onClose={closeBookContextMenu}
+        >
+          <ContextMenuItem
+            icon={Pencil}
+            label={t("address_books.rename")}
+            onClick={() => {
+              const book = bookContextMenu.data!;
+              closeBookContextMenu();
+              onRenameAddressBook(book);
+            }}
+          />
+        </ContextMenu>
+      )}
+
+      {/* Keyword (category) context menu */}
+      {keywordContextMenu.data && onRenameKeyword && (
+        <ContextMenu
+          ref={keywordMenuRef}
+          isOpen={keywordContextMenu.isOpen}
+          position={keywordContextMenu.position}
+          onClose={closeKeywordContextMenu}
+        >
+          <ContextMenuItem
+            icon={Pencil}
+            label={t("rename_category")}
+            onClick={() => {
+              const kw = keywordContextMenu.data!;
+              closeKeywordContextMenu();
+              onRenameKeyword(kw);
+            }}
+          />
+        </ContextMenu>
+      )}
+
       {/* Group context menu */}
       {groupContextMenu.data && (
         <ContextMenu
@@ -438,12 +515,14 @@ function CategoryItem({
   isActive,
   onSelect,
   onDropContacts,
+  onContextMenu,
 }: {
   keyword: string;
   count: number;
   isActive: boolean;
   onSelect: () => void;
   onDropContacts?: (contactIds: string[], keyword: string) => void;
+  onContextMenu?: (e: React.MouseEvent<HTMLButtonElement>) => void;
 }) {
   const [isDragOver, setIsDragOver] = useState(false);
 
@@ -476,6 +555,7 @@ function CategoryItem({
   return (
     <button
       onClick={onSelect}
+      onContextMenu={onContextMenu}
       onDragOver={handleDragOver}
       onDragLeave={handleDragLeave}
       onDrop={handleDrop}
@@ -503,12 +583,14 @@ function AddressBookItem({
   contactCount,
   onSelect,
   onDropContacts,
+  onContextMenu,
 }: {
   book: AddressBook;
   isActive: boolean;
   contactCount: number;
   onSelect: () => void;
   onDropContacts?: (contactIds: string[], addressBook: AddressBook) => void;
+  onContextMenu?: (e: React.MouseEvent<HTMLButtonElement>) => void;
 }) {
   const [isDragOver, setIsDragOver] = useState(false);
 
@@ -541,6 +623,7 @@ function AddressBookItem({
   return (
     <button
       onClick={onSelect}
+      onContextMenu={onContextMenu}
       onDragOver={handleDragOver}
       onDragLeave={handleDragLeave}
       onDrop={handleDrop}

components/email/__tests__/email-list-item.test.tsx

@@ -38,6 +38,7 @@ describe('EmailListItem tag badge', () => {
     useSettingsStore.setState({
       emailKeywords: [...DEFAULT_KEYWORDS],
       showPreview: false,
+      mailLayout: 'split',
     });
     useEmailStore.setState({
       selectedEmailIds: new Set<string>(),
@@ -104,4 +105,17 @@ describe('EmailListItem tag badge', () => {
     render(<EmailListItem email={email} />);
     expect(screen.getByText('Hello World')).toBeInTheDocument();
   });
+
+  it('renders inline preview text in focused mail layout', () => {
+    useSettingsStore.setState({
+      showPreview: true,
+      mailLayout: 'focus',
+    });
+    const email = makeEmail({ preview: 'Inline preview content' });
+    const { container } = render(<EmailListItem email={email} />);
+
+    expect(screen.getByText('Test Subject')).toBeInTheDocument();
+    expect(screen.getByText(/Inline preview content/)).toBeInTheDocument();
+    expect(container.querySelector('p')).toBeNull();
+  });
 });

components/email/calendar-invitation-banner.tsx

@@ -527,7 +527,7 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
       || null;
 
     // Send the iMIP REPLY email to the organizer (client-side scheduling).
-    // Called after updating the local calendar event. Best-effort — if it
+    // Called after updating the local calendar event. Best-effort - if it
     // fails we still report the RSVP as sent since the calendar was updated.
     const sendImipReply = async () => {
       if (!organizerEmail || !parsedEvent?.uid || !currentUserEmail) {
@@ -754,6 +754,9 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
 
       {/* Content */}
       <div className="px-4 py-3 space-y-2.5">
+        <div className="lg:flex lg:gap-6">
+          {/* Left: Event info */}
+          <div className="lg:flex-1 space-y-2.5 min-w-0">
             {/* Event title */}
             {summary?.title && (
               <div className="flex items-start justify-between gap-2">
@@ -772,7 +775,7 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
             )}
 
             {/* Event details */}
-        <div className="space-y-1">
+            <div className="lg:flex lg:items-center lg:gap-4 lg:flex-wrap space-y-1 lg:space-y-0">
               {summary?.start && (
                 <div className="flex items-center gap-1.5 text-sm text-muted-foreground">
                   <Clock className="w-3.5 h-3.5 flex-shrink-0" />
@@ -788,15 +791,30 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
                   <span>{summary.location}</span>
                 </div>
               )}
-          <div className="flex items-center gap-3 text-sm text-muted-foreground flex-wrap">
               {summary?.organizer && (
-              <span className="flex items-center gap-1.5">
+                <span className="flex items-center gap-1.5 text-sm text-muted-foreground">
                   <Users className="w-3.5 h-3.5 flex-shrink-0" />
                   {t('organizer', { name: summary.organizer })}
                 </span>
               )}
               {summary && summary.attendeeCount > 0 && (
-              <span>{t('attendees', { count: summary.attendeeCount })}</span>
+                <span className="text-sm text-muted-foreground">{t('attendees', { count: summary.attendeeCount })}</span>
+              )}
+            </div>
+          </div>
+
+          {/* Right: Info & actor messages on large screens */}
+          <div className="lg:flex-shrink-0 lg:text-right lg:max-w-xs mt-2.5 lg:mt-0 space-y-1">
+            {bannerInfo && (
+              <p className="text-xs text-muted-foreground leading-relaxed">{bannerInfo}</p>
+            )}
+            {actorMessage && (
+              <p className="text-xs text-muted-foreground">{actorMessage}</p>
+            )}
+            {actorSummary?.participationComment && (
+              <p className="text-xs text-muted-foreground italic">
+                {t('actor_note', { comment: actorSummary.participationComment })}
+              </p>
             )}
           </div>
         </div>
@@ -840,23 +858,6 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
           </div>
         )}
 
-        {/* Info text */}
-        {bannerInfo && (
-          <p className="text-xs text-muted-foreground leading-relaxed">{bannerInfo}</p>
-        )}
-
-        {/* Actor message */}
-        {actorMessage && (
-          <p className="text-xs text-muted-foreground">{actorMessage}</p>
-        )}
-
-        {/* Actor comment */}
-        {actorSummary?.participationComment && (
-          <p className="text-xs text-muted-foreground italic">
-            {t('actor_note', { comment: actorSummary.participationComment })}
-          </p>
-        )}
-
         {/* Proposed changes */}
         {proposedChanges.length > 0 && (
           <div className="rounded-md border border-border bg-muted/30 px-3 py-2.5 text-xs">

components/email/email-composer.tsx

@@ -12,6 +12,7 @@ import { toast } from "@/stores/toast-store";
 import { sanitizeEmailHtml } from "@/lib/email-sanitization";
 import { useAuthStore } from "@/stores/auth-store";
 import { useIdentityStore } from "@/stores/identity-store";
+import { useAccountStore } from "@/stores/account-store";
 import { useSmimeStore } from "@/stores/smime-store";
 import { useEmailStore } from "@/stores/email-store";
 import { useSettingsStore } from "@/stores/settings-store";
@@ -29,13 +30,13 @@ import { TemplatePicker } from "@/components/templates/template-picker";
 import { TemplateForm } from "@/components/templates/template-form";
 import type { EmailTemplate } from "@/lib/template-types";
 import { appendPlainTextSignature, getPlainTextSignature } from "@/lib/signature-utils";
+import { findReplyIdentityId } from "@/lib/reply-identity";
 import { RichTextEditor } from "@/components/email/rich-text-editor";
 
 /** Strip HTML tags and decode entities to get a plain-text version */
 function htmlToPlainText(html: string): string {
-  const tmp = document.createElement('div');
-  tmp.innerHTML = html;
-  return tmp.textContent || tmp.innerText || '';
+  const doc = new DOMParser().parseFromString(html, 'text/html');
+  return doc.body.textContent || '';
 }
 
 export interface ComposerDraftData {
@@ -76,12 +77,15 @@ interface EmailComposerProps {
   mode?: 'compose' | 'reply' | 'replyAll' | 'forward';
   replyTo?: {
     from?: { email?: string; name?: string }[];
+    replyToAddresses?: { email?: string; name?: string }[];
     to?: { email?: string; name?: string }[];
     cc?: { email?: string; name?: string }[];
+    bcc?: { email?: string; name?: string }[];
     subject?: string;
     body?: string;
     htmlBody?: string;
     receivedAt?: string;
+    accountId?: string;
   };
 }
 
@@ -100,17 +104,22 @@ export function EmailComposer({
   const tCommon = useTranslations('common');
   const timeFormat = useSettingsStore((state) => state.timeFormat);
   const plainTextMode = useSettingsStore((state) => state.plainTextMode);
+  const autoSelectReplyIdentity = useSettingsStore((state) => state.autoSelectReplyIdentity);
+  const attachmentReminderEnabled = useSettingsStore((state) => state.attachmentReminderEnabled);
+  const attachmentReminderKeywords = useSettingsStore((state) => state.attachmentReminderKeywords);
 
   // Initialize with reply/forward data if provided
   const getInitialTo = () => {
     if (!replyTo) return "";
+    // RFC 5322: use Reply-To header if present, otherwise fall back to From
+    const replyTarget = replyTo.replyToAddresses?.length
+      ? replyTo.replyToAddresses.filter(r => r.email).map(r => r.email).join(", ")
+      : replyTo.from?.[0]?.email || "";
     if (mode === 'reply') {
-      const email = replyTo.from?.[0]?.email || "";
-      return email ? email + ', ' : "";
+      return replyTarget ? replyTarget + ', ' : "";
     } else if (mode === 'replyAll') {
-      const from = replyTo.from?.[0]?.email || "";
       const originalTo = replyTo.to?.filter(r => r.email).map(r => r.email).join(", ") || "";
-      const combined = [from, originalTo].filter(Boolean).join(", ");
+      const combined = [replyTarget, originalTo].filter(Boolean).join(", ");
       return combined ? combined + ', ' : "";
     }
     return "";
@@ -207,6 +216,8 @@ export function EmailComposer({
   const [smimePassphrasePrompt, setSmimePassphrasePrompt] = useState<{ keyId: string; resolve: (passphrase: string) => void; reject: () => void } | null>(null);
   const [smimePassphraseInput, setSmimePassphraseInput] = useState('');
   const [smimePassphraseError, setSmimePassphraseError] = useState('');
+  const [showAttachmentWarning, setShowAttachmentWarning] = useState(false);
+  const [attachmentWarningKeyword, setAttachmentWarningKeyword] = useState('');
 
   const saveTemplateModalRef = useFocusTrap({
     isActive: showSaveAsTemplate,
@@ -220,12 +231,59 @@ export function EmailComposer({
     restoreFocus: true,
   });
 
+  const attachmentWarningRef = useFocusTrap({
+    isActive: showAttachmentWarning,
+    onEscape: () => setShowAttachmentWarning(false),
+    restoreFocus: true,
+  });
+
   const { client } = useAuthStore();
   const identities = useIdentityStore((s) => s.identities);
   const primaryIdentity = identities[0] ?? null;
   const currentIdentity = selectedIdentityId
     ? identities.find((identity) => identity.id === selectedIdentityId) || primaryIdentity
     : primaryIdentity;
+  useEffect(() => {
+    if (!autoSelectReplyIdentity) return;
+    if (selectedIdentityId || initialData?.selectedIdentityId) return;
+    if (mode !== 'reply' && mode !== 'replyAll') return;
+
+    const matchedIdentityId = findReplyIdentityId(identities, {
+      to: replyTo?.to,
+      cc: replyTo?.cc,
+      bcc: replyTo?.bcc,
+    });
+
+    if (matchedIdentityId) {
+      setSelectedIdentityId(matchedIdentityId);
+      return;
+    }
+
+    // Fallback: match identity by the account's email when replying from unified view
+    if (replyTo?.accountId) {
+      const account = useAccountStore.getState().getAccountById(replyTo.accountId);
+      if (account?.email) {
+        const accountEmail = account.email.trim().toLowerCase();
+        const accountIdentity = identities.find(
+          (identity) => identity.email.trim().toLowerCase() === accountEmail
+        );
+        if (accountIdentity) {
+          setSelectedIdentityId(accountIdentity.id);
+        }
+      }
+    }
+  }, [
+    autoSelectReplyIdentity,
+    identities,
+    initialData?.selectedIdentityId,
+    mode,
+    replyTo?.accountId,
+    replyTo?.bcc,
+    replyTo?.cc,
+    replyTo?.to,
+    selectedIdentityId,
+  ]);
+
   const composerSignatureHtml = currentIdentity?.htmlSignature
     ? `<div>${sanitizeEmailHtml(currentIdentity.htmlSignature)}</div>`
     : currentIdentity?.textSignature
@@ -301,6 +359,17 @@ export function EmailComposer({
     return () => window.removeEventListener('beforeunload', handleBeforeUnload);
   }, []);
 
+  // Auto-focus the To field when composing a new email or forwarding
+  useEffect(() => {
+    if (mode === 'forward' || mode === 'compose') {
+      // Small delay to ensure the input is rendered
+      const timer = setTimeout(() => {
+        toInputRef.current?.focus();
+      }, 100);
+      return () => clearTimeout(timer);
+    }
+  }, [mode]);
+
   const [autocompleteResults, setAutocompleteResults] = useState<Array<{ name: string; email: string }>>([]);
   const [activeAutoField, setActiveAutoField] = useState<'to' | 'cc' | 'bcc' | null>(null);
   const [autoSelectedIndex, setAutoSelectedIndex] = useState(-1);
@@ -308,10 +377,26 @@ export function EmailComposer({
   const toInputRef = useRef<HTMLInputElement>(null);
   const ccInputRef = useRef<HTMLInputElement>(null);
   const bccInputRef = useRef<HTMLInputElement>(null);
+  const subjectInputRef = useRef<HTMLInputElement>(null);
+  const bodyRef = useRef<HTMLTextAreaElement>(null);
+  const editorContainerRef = useRef<HTMLDivElement>(null);
   const toDropdownRef = useRef<HTMLDivElement>(null);
   const ccDropdownRef = useRef<HTMLDivElement>(null);
   const bccDropdownRef = useRef<HTMLDivElement>(null);
 
+  const focusSubject = useCallback(() => {
+    subjectInputRef.current?.focus();
+  }, []);
+
+  const focusBody = useCallback(() => {
+    if (plainTextMode) {
+      bodyRef.current?.focus();
+    } else {
+      const proseMirror = editorContainerRef.current?.querySelector('.ProseMirror') as HTMLElement | null;
+      proseMirror?.focus();
+    }
+  }, [plainTextMode]);
+
   const handleAutocomplete = useCallback((value: string, field: 'to' | 'cc' | 'bcc') => {
     if (autocompleteTimeoutRef.current) {
       clearTimeout(autocompleteTimeoutRef.current);
@@ -475,17 +560,18 @@ export function EmailComposer({
     }
   }, [client, t]);
 
-  const handleImageUpload = useCallback(async (file: File): Promise<string | null> => {
-    if (!client) return null;
-    try {
-      const { blobId } = await client.uploadBlob(file);
-      return await client.fetchBlobAsObjectUrl(blobId, file.name, file.type);
-    } catch (error) {
-      debug.error(`Failed to upload inline image ${file.name}:`, error);
+  const handleImageUpload = useCallback((file: File): Promise<string | null> => {
+    return new Promise((resolve) => {
+      const reader = new FileReader();
+      reader.onload = (e) => resolve((e.target?.result as string) ?? null);
+      reader.onerror = () => {
+        debug.error(`Failed to read inline image ${file.name}`);
         toast.error(t('upload_failed', { filename: file.name }));
-      return null;
-    }
-  }, [client, t]);
+        resolve(null);
+      };
+      reader.readAsDataURL(file);
+    });
+  }, [t]);
 
   const handleFileSelect = async (event: React.ChangeEvent<HTMLInputElement>) => {
     if (!event.target.files) return;
@@ -665,7 +751,7 @@ export function EmailComposer({
     return undefined;
   };
 
-  const handleSend = async () => {
+  const handleSend = async (skipAttachmentCheck = false) => {
     const ccAddresses = cc.split(",").map(e => e.trim()).filter(Boolean);
     const bccAddresses = bcc.split(",").map(e => e.trim()).filter(Boolean);
 
@@ -684,6 +770,21 @@ export function EmailComposer({
       return;
     }
 
+    // Attachment reminder check
+    if (!skipAttachmentCheck && attachmentReminderEnabled) {
+      const hasAttachments = attachments.some(att => att.blobId && !att.uploading && !att.error);
+      if (!hasAttachments) {
+        const bodyText = htmlToPlainText(body);
+        const searchText = `${subject} ${bodyText}`.toLowerCase();
+        const matched = attachmentReminderKeywords.find(kw => searchText.includes(kw.toLowerCase()));
+        if (matched) {
+          setAttachmentWarningKeyword(matched);
+          setShowAttachmentWarning(true);
+          return;
+        }
+      }
+    }
+
     let finalDraftId = draftId;
     if (saveTimeoutRef.current) {
       clearTimeout(saveTimeoutRef.current);
@@ -944,7 +1045,7 @@ export function EmailComposer({
         </div>
         {/* Mobile: send button in header */}
         <Button
-          onClick={handleSend}
+          onClick={() => handleSend()}
           disabled={!canSend}
           title={getSendTooltip()}
           size="sm"
@@ -1040,6 +1141,7 @@ export function EmailComposer({
               onInsertAutocomplete={insertAutocomplete}
               validationError={validationErrors.to}
               validationMessage={t('validation.recipient_required')}
+              onTab={focusSubject}
             />
             <div className="flex gap-0.5 shrink-0">
               <Button
@@ -1109,6 +1211,7 @@ export function EmailComposer({
           <div className="flex items-center gap-2 px-4 py-2.5">
             <span className="text-sm text-muted-foreground w-12 md:w-16 shrink-0">{t('subject_label')}</span>
             <Input
+              ref={subjectInputRef}
               type="text"
               placeholder={t('subject_placeholder')}
               value={subject}
@@ -1116,6 +1219,12 @@ export function EmailComposer({
                 setSubject(e.target.value);
                 if (validationErrors.subject) setValidationErrors(prev => ({ ...prev, subject: false }));
               }}
+              onKeyDown={(e) => {
+                if (e.key === 'Tab' && !e.shiftKey) {
+                  e.preventDefault();
+                  focusBody();
+                }
+              }}
               className={cn(
                 "flex-1 border-0 focus-visible:ring-0 h-8 px-0 text-sm",
                 validationErrors.subject && "ring-2 ring-red-500 dark:ring-red-400"
@@ -1128,6 +1237,7 @@ export function EmailComposer({
         {/* Body */}
         {plainTextMode ? (
           <textarea
+            ref={bodyRef}
             value={body}
             onChange={(e) => {
               setBody(e.target.value);
@@ -1142,6 +1252,7 @@ export function EmailComposer({
             aria-invalid={validationErrors.body || undefined}
           />
         ) : (
+          <div ref={editorContainerRef}>
             <RichTextEditor
               content={body}
               onChange={(html) => {
@@ -1152,6 +1263,7 @@ export function EmailComposer({
               placeholder={t('body_placeholder')}
               hasError={validationErrors.body}
             />
+          </div>
         )}
 
         {plainTextMode ? (
@@ -1298,7 +1410,7 @@ export function EmailComposer({
               {t('discard')}
             </button>
             <Button
-              onClick={handleSend}
+              onClick={() => handleSend()}
               disabled={!canSend}
               title={getSendTooltip()}
               className="hidden md:inline-flex"
@@ -1398,6 +1510,36 @@ export function EmailComposer({
         </div>
       )}
 
+      {showAttachmentWarning && (
+        <div
+          className="fixed inset-0 bg-black/50 backdrop-blur-[1px] flex items-center justify-center z-[60] p-4 animate-in fade-in duration-150"
+          onClick={() => setShowAttachmentWarning(false)}
+        >
+          <div
+            ref={attachmentWarningRef}
+            role="alertdialog"
+            aria-modal="true"
+            onClick={(e) => e.stopPropagation()}
+            className="bg-background border border-border rounded-lg shadow-xl w-full max-w-md animate-in zoom-in-95 duration-200"
+          >
+            <div className="p-6">
+              <h2 className="text-lg font-semibold text-foreground">{t('forgot_attachment.title')}</h2>
+              <p className="mt-2 text-sm text-muted-foreground">
+                {t('forgot_attachment.message', { keyword: attachmentWarningKeyword })}
+              </p>
+            </div>
+            <div className="flex items-center justify-end gap-3 px-6 pb-6">
+              <Button variant="outline" onClick={() => setShowAttachmentWarning(false)}>
+                {t('forgot_attachment.back')}
+              </Button>
+              <Button onClick={() => { setShowAttachmentWarning(false); handleSend(true); }}>
+                {t('forgot_attachment.send_anyway')}
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
+
       {showCloseDialog && (
         <div
           className="fixed inset-0 bg-black/50 backdrop-blur-[1px] flex items-center justify-center z-[60] p-4 animate-in fade-in duration-150"
@@ -1483,6 +1625,7 @@ function RecipientChipInput({
   onInsertAutocomplete,
   validationError,
   validationMessage,
+  onTab,
 }: {
   value: string;
   onChange: (value: string) => void;
@@ -1499,6 +1642,7 @@ function RecipientChipInput({
   onInsertAutocomplete: (email: string, field: 'to' | 'cc' | 'bcc') => void;
   validationError?: boolean;
   validationMessage?: string;
+  onTab?: () => void;
 }) {
   const allParts = value.split(',').map(s => s.trim()).filter(Boolean);
   const hasTrailingComma = value.trimEnd().endsWith(',');
@@ -1532,7 +1676,18 @@ function RecipientChipInput({
     if ((e.key === ' ' || e.key === 'Enter' || e.key === 'Tab') && inputText.trim()) {
       if (e.key !== 'Tab') e.preventDefault();
       commitCurrentInput();
+      if (e.key === 'Tab' && onTab) {
+        e.preventDefault();
+        setTimeout(() => onTab(), 0);
+      } else {
         setTimeout(() => inputRef.current?.focus(), 0);
+      }
+      return;
+    }
+
+    if (e.key === 'Tab' && !e.shiftKey && onTab) {
+      e.preventDefault();
+      onTab();
       return;
     }
 

components/email/email-context-menu.tsx

@@ -89,17 +89,18 @@ const getMailboxIcon = (role?: string) => {
   }
 };
 
-// Get current label/color from email keywords (supports both $label: and legacy $color:)
-const getCurrentColor = (keywords: Record<string, boolean> | undefined) => {
-  if (!keywords) return null;
+// Get all active label/color tag IDs from email keywords
+const getCurrentColors = (keywords: Record<string, boolean> | undefined): string[] => {
+  if (!keywords) return [];
+  const tags: string[] = [];
   for (const key of Object.keys(keywords)) {
     if ((key.startsWith("$label:") || key.startsWith("$color:")) && keywords[key] === true) {
-      return key.startsWith("$label:")
-        ? key.slice("$label:".length)
-        : key.slice("$color:".length);
+      tags.push(
+        key.startsWith("$label:") ? key.slice("$label:".length) : key.slice("$color:".length)
+      );
     }
   }
-  return null;
+  return tags;
 };
 
 export function EmailContextMenu({
@@ -137,7 +138,7 @@ export function EmailContextMenu({
   const isUnread = !email.keywords?.$seen;
   const isStarred = email.keywords?.$flagged;
   const isDraft = email.keywords?.['$draft'] === true;
-  const currentColor = getCurrentColor(email.keywords);
+  const currentColors = getCurrentColors(email.keywords);
   const showBatchActions = isMultiSelect && selectedCount > 1;
   const isInJunkFolder = currentMailboxRole === 'junk';
 
@@ -306,24 +307,27 @@ export function EmailContextMenu({
       {/* Set tag submenu - only for single email */}
       {!showBatchActions && (
         <ContextMenuSubMenu icon={Tag} label={t("color_tag")}>
-          {colorOptions.map((option) => (
+          {colorOptions.map((option) => {
+            const isActive = currentColors.includes(option.value);
+            return (
               <button
                 key={option.value}
                 role="menuitem"
                 onClick={() => handleAction(() => onSetColorTag?.(option.value))}
                 className={cn(
                   "w-full px-3 py-1.5 text-sm text-left flex items-center gap-2 hover:bg-muted cursor-pointer",
-                currentColor === option.value && "bg-accent font-medium"
+                  isActive && "bg-accent font-medium"
                 )}
               >
                 <span className={cn("w-3 h-3 rounded-full flex-shrink-0", option.color)} />
                 <span className="flex-1">{option.name}</span>
-              {currentColor === option.value && (
+                {isActive && (
                   <Check className="w-3.5 h-3.5 flex-shrink-0 text-foreground" />
                 )}
               </button>
-          ))}
-          {currentColor && (
+            );
+          })}
+          {currentColors.length > 0 && (
             <>
               <ContextMenuSeparator />
               <ContextMenuItem

components/email/email-hover-actions.tsx

@@ -9,6 +9,7 @@ import { useTranslations } from "next-intl";
 
 interface EmailHoverActionsProps {
   email: Email;
+  backgroundClassName?: string;
   onToggleStar?: () => void;
   onMarkAsRead?: (read: boolean) => void;
   onDelete?: () => void;
@@ -63,6 +64,7 @@ const CORNER_CLASSES = {
 
 export function EmailHoverActions({
   email,
+  backgroundClassName = "bg-muted",
   onToggleStar,
   onMarkAsRead,
   onDelete,
@@ -77,6 +79,7 @@ export function EmailHoverActions({
 
   const isUnread = !email.keywords?.$seen;
   const isStarred = email.keywords?.$flagged;
+  const hoverBackgroundClassName = backgroundClassName;
 
   if (hoverActions.length === 0) return null;
 
@@ -91,7 +94,7 @@ export function EmailHoverActions({
         onToggleStar?.();
         break;
       case "markRead":
-        onMarkAsRead?.(!isUnread);
+        onMarkAsRead?.(isUnread);
         break;
       case "archive":
         onArchive?.();
@@ -144,7 +147,10 @@ export function EmailHoverActions({
           CORNER_CLASSES[hoverActionsCorner],
         )}
       >
-        <div className="flex items-center gap-0.5 bg-muted rounded-lg px-1.5 py-0.5 shadow-md border border-border">
+        <div className={cn(
+          "flex items-center gap-0.5 rounded-lg px-1.5 py-0.5 shadow-md border border-border",
+          hoverBackgroundClassName,
+        )}>
           {actionButtons}
         </div>
       </div>
@@ -155,8 +161,14 @@ export function EmailHoverActions({
     <div
       className="absolute right-0 top-0 bottom-0 z-10 hidden group-hover:flex items-center"
     >
-      <div className="w-8 h-full bg-gradient-to-r from-transparent to-muted" />
-      <div className="flex items-center gap-0.5 h-full bg-muted pr-3 pl-0.5">
+      <div
+        className={cn("w-8 h-full", hoverBackgroundClassName)}
+        style={{
+          WebkitMaskImage: "linear-gradient(to right, transparent, black)",
+          maskImage: "linear-gradient(to right, transparent, black)",
+        }}
+      />
+      <div className={cn("flex items-center gap-0.5 h-full pr-3 pl-0.5", hoverBackgroundClassName)}>
         {actionButtons}
       </div>
     </div>

components/email/email-list-item.tsx

@@ -15,7 +15,7 @@ import { useLongPress } from "@/hooks/use-long-press";
 import { useUIStore } from "@/stores/ui-store";
 import { EmailIdentityBadge } from "./email-identity-badge";
 import { EmailHoverActions } from "./email-hover-actions";
-import { getEmailColorTag } from "@/lib/thread-utils";
+import { getEmailColorTags } from "@/lib/thread-utils";
 
 interface EmailListItemProps {
   email: Email;
@@ -32,9 +32,10 @@ interface EmailListItemProps {
 
 export function EmailListItem({ email, selected, onClick, onContextMenu, onToggleStar, onMarkAsRead, onDelete, onArchive, onSetColorTag, onMarkAsSpam }: EmailListItemProps) {
   const t = useTranslations('email_viewer');
-  const { selectedEmailIds, toggleEmailSelection, selectRangeEmails, selectedMailbox, clearSelection } = useEmailStore();
+  const { selectedEmailIds, toggleEmailSelection, selectRangeEmails, selectedMailbox, mailboxes, clearSelection } = useEmailStore();
   const showPreview = useSettingsStore((state) => state.showPreview);
   const density = useSettingsStore((state) => state.density);
+  const mailLayout = useSettingsStore((state) => state.mailLayout);
   const emailKeywords = useSettingsStore((state) => state.emailKeywords);
   const { identities } = useAuthStore();
   const isChecked = selectedEmailIds.has(email.id);
@@ -43,11 +44,18 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
   const isImportant = email.keywords?.["$important"];
   const isAnswered = email.keywords?.$answered;
   const isForwarded = email.keywords?.$forwarded;
-  const sender = email.from?.[0];
+  // In Sent/Drafts folders, show recipient instead of sender (which is always "me")
+  const currentMailboxRole = mailboxes.find(mb => mb.id === selectedMailbox)?.role;
+  const showRecipient = currentMailboxRole === 'sent' || currentMailboxRole === 'drafts';
+  const sender = showRecipient ? (email.to?.[0] ?? email.from?.[0]) : email.from?.[0];
+  const isFocusedMailLayout = mailLayout === 'focus';
+  const inlinePreview = showPreview && email.preview ? ` ${email.preview}` : '';
 
-  // Resolve color tag using keyword definitions from settings
-  const colorTagId = getEmailColorTag(email.keywords);
-  const keywordDef = colorTagId ? emailKeywords.find(k => k.id === colorTagId) : null;
+  // Resolve color tags using keyword definitions from settings; unknown tags fall back to gray
+  const colorTagIds = getEmailColorTags(email.keywords);
+  const keywordDefs = colorTagIds.map(id => emailKeywords.find(k => k.id === id) ?? { id, label: id, color: 'gray' });
+  // Use first tag for background coloring
+  const keywordDef = keywordDefs[0] ?? null;
   const colorTag = keywordDef ? KEYWORD_PALETTE[keywordDef.color]?.bg ?? null : null;
 
   // Drag and drop functionality
@@ -114,15 +122,19 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
         }
       }}
       onContextMenu={handleContextMenu}
-      style={{ minHeight: 'var(--list-item-height)' }}
+      style={{ minHeight: isFocusedMailLayout ? undefined : 'var(--list-item-height)' }}
+    >
+      <div
+        className={cn('px-4', isFocusedMailLayout ? 'flex items-center py-2.5' : 'flex items-start')}
+        style={isFocusedMailLayout ? { gap: '12px' } : { gap: 'var(--density-item-gap)', paddingBlock: 'var(--density-item-py)' }}
       >
-      <div className="flex items-start px-4" style={{ gap: 'var(--density-item-gap)', paddingBlock: 'var(--density-item-py)' }}>
         {/* Checkbox - only visible when in selection mode */}
         {selectedEmailIds.size > 0 && (
           <button
             onClick={handleCheckboxClick}
             className={cn(
-              "p-3 lg:p-1 rounded mt-2 flex-shrink-0 transition-all duration-200",
+              "p-3 lg:p-1 rounded flex-shrink-0 transition-all duration-200",
+              !isFocusedMailLayout && 'mt-2',
               "hover:bg-muted/50 hover:scale-110",
               "active:scale-95",
               "animate-in fade-in zoom-in-95 duration-150",
@@ -145,7 +157,7 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
         )}
 
         {/* Avatar */}
-        {density !== 'extra-compact' && (
+        {!isFocusedMailLayout && density !== 'extra-compact' && (
           <Avatar
             name={sender?.name}
             email={sender?.email}
@@ -156,6 +168,52 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
 
         {/* Content */}
         <div className="flex-1 min-w-0">
+          {isFocusedMailLayout ? (
+            <div className="flex items-center justify-between gap-3">
+              <div className="flex min-w-0 flex-1 items-center gap-3">
+                <span className={cn(
+                  'w-32 shrink-0 truncate text-sm lg:w-40',
+                  isUnread ? 'font-semibold text-foreground' : 'font-medium text-foreground/80'
+                )}>
+                  {sender?.name || sender?.email || 'Unknown'}
+                </span>
+                <div className="flex min-w-0 flex-1 items-center gap-2 text-sm">
+                  <span className={cn(
+                    'shrink-0 truncate',
+                    isUnread ? 'font-semibold text-foreground' : 'text-foreground/90'
+                  )}>
+                    {email.subject || t('no_subject')}
+                  </span>
+                  {inlinePreview && (
+                    <span className="min-w-0 truncate text-muted-foreground">{inlinePreview}</span>
+                  )}
+                </div>
+              </div>
+              <div className="flex items-center gap-2.5 shrink-0">
+                {isStarred && <Star className="w-3.5 h-3.5 fill-amber-400 text-amber-400" />}
+                {isImportant && <span className="h-2 w-2 rounded-full bg-warning" />}
+                {isAnswered && !isForwarded && <Reply className="w-3.5 h-3.5 text-muted-foreground" />}
+                {isForwarded && !isAnswered && <Forward className="w-3.5 h-3.5 text-muted-foreground" />}
+                {isAnswered && isForwarded && (
+                  <>
+                    <Reply className="w-3.5 h-3.5 text-muted-foreground" />
+                    <Forward className="w-3.5 h-3.5 text-muted-foreground" />
+                  </>
+                )}
+                {email.hasAttachment && <Paperclip className="w-3.5 h-3.5 text-muted-foreground" />}
+                {keywordDefs.map((kd) => (
+                  <span key={kd.id} className={cn('h-2.5 w-2.5 rounded-full', KEYWORD_PALETTE[kd.color]?.dot || 'bg-gray-400')} />
+                ))}
+                <span className={cn(
+                  'text-xs tabular-nums',
+                  isUnread ? 'text-foreground font-semibold' : 'text-muted-foreground'
+                )}>
+                  {formatDate(email.receivedAt)}
+                </span>
+              </div>
+            </div>
+          ) : (
+            <>
               {/* First Line: Sender and Date */}
               <div className="flex items-center justify-between gap-2 mb-1">
                 <div className="flex items-center gap-2 min-w-0 flex-1">
@@ -195,15 +253,15 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
                   </div>
                 </div>
                 <div className="flex items-center gap-1.5 flex-shrink-0">
-              {keywordDef && (
-                <span className={cn(
+                  {keywordDefs.map((kd) => (
+                    <span key={kd.id} className={cn(
                       "inline-flex items-center gap-1 px-1.5 py-0.5 text-[10px] font-medium rounded-full",
-                  KEYWORD_PALETTE[keywordDef.color]?.bg || "bg-muted"
+                      KEYWORD_PALETTE[kd.color]?.bg || "bg-muted"
                     )}>
-                  <span className={cn("w-1.5 h-1.5 rounded-full", KEYWORD_PALETTE[keywordDef.color]?.dot || "bg-gray-400")} />
-                  {keywordDef.label}
+                      <span className={cn("w-1.5 h-1.5 rounded-full", KEYWORD_PALETTE[kd.color]?.dot || "bg-gray-400")} />
+                      {kd.label}
                     </span>
-              )}
+                  ))}
                   <span className={cn(
                     "text-xs tabular-nums",
                     isUnread
@@ -236,12 +294,15 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
                   {email.preview || "No preview available"}
                 </p>
               )}
+            </>
+          )}
         </div>
       </div>
 
       {/* Hover Quick Actions */}
       <EmailHoverActions
         email={email}
+        backgroundClassName={colorTag ? colorTag : (selected ? "bg-selection" : "bg-muted")}
         onToggleStar={onToggleStar}
         onMarkAsRead={onMarkAsRead}
         onDelete={onDelete}

components/email/email-list.tsx

@@ -103,11 +103,16 @@ export function EmailList({
   const parentRef = useRef<HTMLDivElement>(null);
   const density = useSettingsStore((state) => state.density);
   const showPreview = useSettingsStore((state) => state.showPreview);
+  const mailLayout = useSettingsStore((state) => state.mailLayout);
+  const isFocusedMailLayout = mailLayout === 'focus';
 
   const estimateSize = useCallback(() => {
+    if (isFocusedMailLayout) {
+      return { 'extra-compact': 32, compact: 40, regular: 46, comfortable: 54 }[density];
+    }
     const base = { 'extra-compact': 32, compact: 60, regular: 84, comfortable: 104 }[density];
     return (showPreview && density !== 'extra-compact') ? base + 36 : base;
-  }, [density, showPreview]);
+  }, [density, isFocusedMailLayout, showPreview]);
 
   const virtualizer = useVirtualizer({
     count: threadGroups.length,
@@ -171,7 +176,7 @@ export function EmailList({
 
     setIsProcessing(true);
     try {
-      await batchDelete(client);
+      await batchDelete(client, isInTrash);
     } finally {
       setTimeout(() => setIsProcessing(false), 500);
     }
@@ -216,15 +221,26 @@ export function EmailList({
     }
   }, [client, expandedThreadIds, toggleThreadExpansion, fetchThreadEmails]);
 
-  // Range-based load more: trigger when last visible item is near the end
+  // Range-based load more: trigger when last visible item is near the end.
+  // Debounce to prevent rapid cascade when thread grouping reduces item
+  // count below the viewport size (e.g. 2400 emails → fewer thread groups).
   const virtualItems = virtualizer.getVirtualItems();
   const lastVirtualItemIndex = virtualItems[virtualItems.length - 1]?.index;
+  const loadMoreTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
 
   useEffect(() => {
     if (lastVirtualItemIndex === undefined) return;
     if (lastVirtualItemIndex >= threadGroups.length - 5) {
+      // Clear any pending timer so we don't stack calls
+      if (loadMoreTimerRef.current) clearTimeout(loadMoreTimerRef.current);
+      loadMoreTimerRef.current = setTimeout(() => {
         handleLoadMore();
+        loadMoreTimerRef.current = null;
+      }, 150);
     }
+    return () => {
+      if (loadMoreTimerRef.current) clearTimeout(loadMoreTimerRef.current);
+    };
   }, [lastVirtualItemIndex, threadGroups.length, handleLoadMore]);
 
   // Scroll to the thread group containing the selected email
@@ -244,7 +260,7 @@ export function EmailList({
   useEffect(() => {
     virtualizer.measure();
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [density, showPreview]);
+  }, [density, isFocusedMailLayout, showPreview]);
 
   return (
     <div className={cn("flex flex-col min-h-0", className)}>

components/email/email-viewer.tsx

@@ -8,7 +8,7 @@ import { EMAIL_SANITIZE_CONFIG, collapseBlockedImageContainers } from "@/lib/ema
 import { hasMeaningfulHtmlBody } from "@/lib/signature-utils";
 import { Button } from "@/components/ui/button";
 import { Avatar } from "@/components/ui/avatar";
-import { formatFileSize, cn, buildMailboxTree, MailboxNode, formatDateTime } from "@/lib/utils";
+import { formatFileSize, cn, buildMailboxTree, MailboxNode, formatDateTime, generateUUID } from "@/lib/utils";
 import { getSecurityStatus, extractListHeaders } from "@/lib/email-headers";
 import {
   Reply,
@@ -68,6 +68,7 @@ import {
   HelpCircle,
   EditIcon,
   PlayCircle,
+  PenSquare,
 } from "lucide-react";
 import { useTranslations } from "next-intl";
 import type { Attachment as PostalMimeAttachment } from 'postal-mime';
@@ -84,7 +85,7 @@ import { UnsubscribeBanner } from "./unsubscribe-banner";
 import { CalendarInvitationBanner } from "./calendar-invitation-banner";
 import { useTour } from "@/components/tour/tour-provider";
 import { SmimePassphraseDialog } from "@/components/settings/smime-passphrase-dialog";
-import { findCalendarAttachment } from "@/lib/calendar-invitation";
+import { findCalendarAttachment, isCalendarMimeType } from "@/lib/calendar-invitation";
 import { RecipientPopover } from "./recipient-popover";
 import { isFilePreviewable } from "@/lib/file-preview";
 import { SmimeStatusBanner } from "./smime-status-banner";
@@ -121,6 +122,7 @@ interface EmailViewerProps {
   onNavigatePrev?: () => void;
   onShowShortcuts?: () => void;
   onEditDraft?: () => void;
+  onCompose?: () => void;
   currentUserEmail?: string;
   currentUserName?: string;
   currentMailboxRole?: string;
@@ -191,16 +193,17 @@ const getAttachmentDisplayName = (name: string | null | undefined, mimeType?: st
   return 'Attachment';
 };
 
-const getCurrentColor = (keywords: Record<string, boolean> | undefined) => {
-  if (!keywords) return null;
+const getCurrentColors = (keywords: Record<string, boolean> | undefined): string[] => {
+  if (!keywords) return [];
+  const tags: string[] = [];
   for (const key of Object.keys(keywords)) {
     if ((key.startsWith("$label:") || key.startsWith("$color:")) && keywords[key] === true) {
-      return key.startsWith("$label:")
-        ? key.slice("$label:".length)
-        : key.slice("$color:".length);
+      tags.push(
+        key.startsWith("$label:") ? key.slice("$label:".length) : key.slice("$color:".length)
+      );
     }
   }
-  return null;
+  return tags;
 };
 
 // Helper function to format recipients with contextual display
@@ -737,7 +740,7 @@ function ContactSidebarPanel({
                   <div key={i} className="text-sm">
                     {o.name}
                     {o.units && o.units.length > 0 && (
-                      <span className="text-muted-foreground"> — {o.units.map(u => u.name).join(", ")}</span>
+                      <span className="text-muted-foreground"> - {o.units.map(u => u.name).join(", ")}</span>
                     )}
                   </div>
                 ))}
@@ -865,6 +868,7 @@ export function EmailViewer({
   onNavigatePrev,
   onShowShortcuts,
   onEditDraft,
+  onCompose,
   currentUserEmail,
   currentUserName,
   currentMailboxRole,
@@ -884,11 +888,16 @@ export function EmailViewer({
   const attachmentPosition = useSettingsStore((state) => state.attachmentPosition);
   const addTrustedSender = useSettingsStore((state) => state.addTrustedSender);
   const isSenderTrusted = useSettingsStore((state) => state.isSenderTrusted);
+  const trustedSendersAddressBook = useSettingsStore((state) => state.trustedSendersAddressBook);
+  const isTrustedAddressBookSender = useContactStore((state) => state.isTrustedAddressBookSender);
+  const addToTrustedSendersBook = useContactStore((state) => state.addToTrustedSendersBook);
   const emailKeywords = useSettingsStore((state) => state.emailKeywords);
   const toolbarPosition = useSettingsStore((state) => state.toolbarPosition);
   const showToolbarLabels = useSettingsStore((state) => state.showToolbarLabels);
+  const mailLayout = useSettingsStore((state) => state.mailLayout);
   const calendarInvitationParsingEnabled = useSettingsStore((state) => state.calendarInvitationParsingEnabled);
   const timeFormat = useSettingsStore((state) => state.timeFormat);
+  const isFocusedMailLayout = mailLayout === 'focus';
 
   // Detect if current mailbox is Junk folder
   const isInJunkFolder = currentMailboxRole === 'junk';
@@ -906,7 +915,7 @@ export function EmailViewer({
   // Tablet list visibility
   const { isTablet, isMobile } = useDeviceDetection();
   const { tabletListVisible } = useUIStore();
-  const { identities, client, isDemoMode } = useAuthStore();
+  const { identities, client, isDemoMode, activeAccountId } = useAuthStore();
   const resolvedTheme = useThemeStore((state) => state.resolvedTheme);
   const { startTour } = useTour();
   const [showFullHeaders, setShowFullHeaders] = useState(false);
@@ -928,7 +937,8 @@ export function EmailViewer({
   const moveMenuRef = useRef<HTMLDivElement>(null);
   const toolbarRef = useRef<HTMLDivElement>(null);
   const [hiddenPriorities, setHiddenPriorities] = useState<Set<number>>(new Set());
-  const currentColor = getCurrentColor(email?.keywords);
+  const currentColors = getCurrentColors(email?.keywords);
+  const currentColor = currentColors[0] ?? null;
 
   // S/MIME state
   const [smimeStatus, setSmimeStatus] = useState<SmimeStatus | null>(null);
@@ -960,9 +970,9 @@ export function EmailViewer({
 
   // Ensure S/MIME key records are loaded from IndexedDB
   useLayoutEffect(() => {
-    smimeStore.load();
+    smimeStore.load(activeAccountId ?? undefined);
   // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
+  }, [activeAccountId]);
 
   // Build mailbox tree for move-to dropdown
   const moveTargetIds = useMemo(() => new Set(
@@ -1147,9 +1157,27 @@ export function EmailViewer({
     }
   );
 
+  const autoMarkedEmailRef = useRef<string | null>(null);
+
+  // Reset auto-mark tracking when email changes
+  useEffect(() => {
+    autoMarkedEmailRef.current = null;
+  }, [email?.id]);
+
   useEffect(() => {
     // Mark as read when email is viewed, respecting the delay setting
-    if (!email || email.keywords?.$seen || !onMarkAsRead) {
+    if (!email || !onMarkAsRead) {
+      return;
+    }
+
+    // Already read - record that so manual unread toggle won't re-trigger auto-mark
+    if (email.keywords?.$seen) {
+      autoMarkedEmailRef.current = email.id;
+      return;
+    }
+
+    // Don't re-trigger if we already auto-marked this email (user may have toggled it back to unread)
+    if (autoMarkedEmailRef.current === email.id) {
       return;
     }
 
@@ -1162,17 +1190,18 @@ export function EmailViewer({
 
     // Instant mark
     if (markAsReadDelay === 0) {
+      autoMarkedEmailRef.current = email.id;
       onMarkAsRead(email.id, true);
       return;
     }
 
     // Delayed mark
     const timeout = setTimeout(() => {
+      autoMarkedEmailRef.current = email.id;
       onMarkAsRead(email.id, true);
     }, markAsReadDelay);
 
     return () => clearTimeout(timeout);
-  // eslint-disable-next-line react-hooks/exhaustive-deps -- email?.id changes when email changes, which is the intended trigger
   }, [email?.id, email?.keywords?.$seen, onMarkAsRead]);
 
   // Reset external content permission and quick reply when email changes
@@ -1540,8 +1569,25 @@ export function EmailViewer({
 
         if (detection.type === 'enveloped-data') {
           // Encrypted message
-            const { keyRecords, unlockedDecryptionKeys } = smimeStore;
-            smimeDebug('[S/MIME] decrypt attempt:', { keyRecordCount: keyRecords.length, unlockedKeyCount: unlockedDecryptionKeys.size, keyRecordIds: keyRecords.map(k => k.id) });
+            const { keyRecords, unlockedDecryptionKeys, unlockedLegacyDecryptionKeys } = smimeStore;
+            smimeDebug('[S/MIME] decrypt attempt:', {
+              keyRecordCount: keyRecords.length,
+              unlockedKeyCount: unlockedDecryptionKeys.size,
+              legacyKeyCount: unlockedLegacyDecryptionKeys.size,
+              keyRecordIds: keyRecords.map(k => k.id),
+            });
+
+          // Short-circuit: no keys imported at all
+          if (keyRecords.length === 0) {
+            smimeDebug('[S/MIME] no key records available, skipping decrypt');
+            setSmimeStatus({
+              isSigned: false,
+              isEncrypted: true,
+              decryptionError: 'no-key',
+            });
+            return;
+          }
+
           try {
             let result: Awaited<ReturnType<typeof smimeDecrypt>> | null = null;
             let lastError: unknown = null;
@@ -1552,6 +1598,7 @@ export function EmailViewer({
                   cmsBytes: candidate.normalized,
                   keyRecords,
                     unlockedKeys: unlockedDecryptionKeys,
+                    legacyUnlockedKeys: unlockedLegacyDecryptionKeys,
                 });
                 smimeDebug('[S/MIME] decrypt success with candidate:', {
                   source: candidate.source,
@@ -1597,7 +1644,7 @@ export function EmailViewer({
             // Check if inner content is also signed
             const nestedSignedData = extractNestedSignedDataCandidate(parsed, result.mimeBytes);
             if (nestedSignedData) {
-              // Nested sign-then-encrypt — verify inner signature
+              // Nested sign-then-encrypt - verify inner signature
               const innerBytes = normalizeCmsBytes(nestedSignedData.bytes);
               smimeDebug('[S/MIME] nested signed-data candidate:', {
                 source: nestedSignedData.source,
@@ -1633,8 +1680,15 @@ export function EmailViewer({
                   if (!existing) {
                     try {
                       await smimeStore.importPublicCert(verifyResult.status.signerCert.certificate, 'signed-email');
-                    } catch { /* ignore import errors */ }
+                      smimeDebug('[S/MIME] auto-imported signer cert:', { email: verifyResult.status.signerCert.email, fingerprint: verifyResult.status.signerCert.fingerprint });
+                    } catch (importErr) {
+                      smimeError('[S/MIME] auto-import signer cert failed:', importErr);
                     }
+                  } else {
+                    smimeDebug('[S/MIME] signer cert already imported:', { email: existing.email, fingerprint: existing.fingerprint });
+                  }
+                } else if (verifyResult.status.signatureValid && verifyResult.status.signerCert) {
+                  smimeDebug('[S/MIME] auto-import disabled, skipping signer cert:', { email: verifyResult.status.signerCert.email });
                 }
               } catch (error) {
                 smimeError('[S/MIME] nested signature verify failed:', {
@@ -1672,10 +1726,12 @@ export function EmailViewer({
                 decryptionError: 'locked',
               });
             } else {
+              const errMsg = err instanceof Error ? err.message : 'Decryption failed';
+              const isNoKeyError = errMsg.includes('No imported S/MIME key matches');
               setSmimeStatus({
                 isSigned: false,
                 isEncrypted: true,
-                decryptionError: err instanceof Error ? err.message : 'Decryption failed',
+                decryptionError: isNoKeyError ? 'no-key' : errMsg,
               });
             }
           }
@@ -1737,8 +1793,15 @@ export function EmailViewer({
               if (!existing) {
                 try {
                   await smimeStore.importPublicCert(result.status.signerCert.certificate, 'signed-email');
-                } catch { /* ignore import errors */ }
+                  smimeDebug('[S/MIME] auto-imported signer cert:', { email: result.status.signerCert.email, fingerprint: result.status.signerCert.fingerprint });
+                } catch (importErr) {
+                  smimeError('[S/MIME] auto-import signer cert failed:', importErr);
                 }
+              } else {
+                smimeDebug('[S/MIME] signer cert already imported:', { email: existing.email, fingerprint: existing.fingerprint });
+              }
+            } else if (result.status.signatureValid && result.status.signerCert) {
+              smimeDebug('[S/MIME] auto-import disabled, skipping signer cert:', { email: result.status.signerCert.email });
             }
           } catch (err) {
             if (cancelled) return;
@@ -1771,6 +1834,7 @@ export function EmailViewer({
     smimeStore.autoImportSignerCerts,
     smimeStore.keyRecords,
     smimeStore.unlockedDecryptionKeys,
+    smimeStore.unlockedLegacyDecryptionKeys,
     smimeStore,
   ]);
 
@@ -1780,61 +1844,61 @@ export function EmailViewer({
 
     const tnefAtt = email.attachments.find(att => isTnefAttachment(att.name, att.type));
     if (!tnefAtt?.blobId) {
-      debug.log('TNEF: No winmail.dat attachment found in email', email?.id);
+      debug.log('email', 'TNEF: No winmail.dat attachment found in email', email?.id);
       return;
     }
 
-    debug.group('TNEF Processing');
-    debug.log('Found TNEF attachment:', tnefAtt.name, 'type:', tnefAtt.type, 'blobId:', tnefAtt.blobId, 'size:', tnefAtt.size);
+    debug.group('TNEF Processing', 'email');
+    debug.log('email', 'Found TNEF attachment:', tnefAtt.name, 'type:', tnefAtt.type, 'blobId:', tnefAtt.blobId, 'size:', tnefAtt.size);
 
     // Check if the email already has a usable HTML body with real content
     // Outlook often forwards TNEF emails with an HTML body that's just Word
-    // boilerplate (CSS + &nbsp;) — treat these as effectively empty.
+    // boilerplate (CSS + &nbsp;) - treat these as effectively empty.
     const htmlPartId = email.htmlBody?.[0]?.partId;
     const htmlValue = htmlPartId ? email.bodyValues?.[htmlPartId]?.value?.trim() : '';
     let hasRealHtmlBody = !!htmlValue;
     if (hasRealHtmlBody && htmlValue && isHtmlBodyEffectivelyEmpty(htmlValue)) {
       hasRealHtmlBody = false;
-      debug.log('TNEF: Email HTML body is effectively empty (only boilerplate/whitespace), treating as no body');
+      debug.log('email', 'TNEF: Email HTML body is effectively empty (only boilerplate/whitespace), treating as no body');
     }
     if (hasRealHtmlBody) {
-      debug.log('TNEF: Email has real HTML body, will extract attachments only');
+      debug.log('email', 'TNEF: Email has real HTML body, will extract attachments only');
     } else {
-      debug.log('TNEF: Email has no usable HTML body, proceeding with full TNEF extraction');
+      debug.log('email', 'TNEF: Email has no usable HTML body, proceeding with full TNEF extraction');
     }
 
     let cancelled = false;
 
     async function processTnef() {
       try {
-        debug.time('TNEF fetch blob');
+        debug.time('TNEF fetch blob', 'email');
         const blobBytes = await client!.fetchBlobArrayBuffer(tnefAtt!.blobId!);
-        debug.timeEnd('TNEF fetch blob');
-        debug.log('TNEF: Fetched blob, size:', blobBytes.byteLength, 'bytes');
+        debug.timeEnd('TNEF fetch blob', 'email');
+        debug.log('email', 'TNEF: Fetched blob, size:', blobBytes.byteLength, 'bytes');
 
         if (cancelled) {
-          debug.log('TNEF: Processing cancelled after fetch');
+          debug.log('email', 'TNEF: Processing cancelled after fetch');
           debug.groupEnd();
           return;
         }
         if (blobBytes.byteLength === 0) {
-          debug.warn('TNEF: Fetched blob is empty (0 bytes)');
+          debug.warn('email', 'TNEF: Fetched blob is empty (0 bytes)');
           debug.groupEnd();
           return;
         }
 
         const tnefData = new Uint8Array(blobBytes);
-        debug.time('TNEF parse');
+        debug.time('TNEF parse', 'email');
         const parsed = parseTnef(tnefData);
-        debug.timeEnd('TNEF parse');
+        debug.timeEnd('TNEF parse', 'email');
 
         if (cancelled) {
-          debug.log('TNEF: Processing cancelled after parse');
+          debug.log('email', 'TNEF: Processing cancelled after parse');
           debug.groupEnd();
           return;
         }
 
-        debug.log('TNEF parse result — htmlBody:', !!parsed.htmlBody, '(' + (parsed.htmlBody?.length ?? 0) + ' chars)', ', body:', !!parsed.body, '(' + (parsed.body?.length ?? 0) + ' chars)', ', attachments:', parsed.attachments.length);
+        debug.log('email', 'TNEF parse result - htmlBody:', !!parsed.htmlBody, '(' + (parsed.htmlBody?.length ?? 0) + ' chars)', ', body:', !!parsed.body, '(' + (parsed.body?.length ?? 0) + ' chars)', ', attachments:', parsed.attachments.length);
 
         if (parsed.htmlBody && !hasRealHtmlBody) {
           setTnefHtml(parsed.htmlBody);
@@ -1844,11 +1908,11 @@ export function EmailViewer({
         }
         if (parsed.attachments.length > 0) {
           setTnefAttachments(parsed.attachments);
-          debug.log('TNEF extracted attachments:', parsed.attachments.map(a => a.name + ' (' + a.mimeType + ', ' + a.data.byteLength + ' bytes)').join(', '));
+          debug.log('email', 'TNEF extracted attachments:', parsed.attachments.map(a => a.name + ' (' + a.mimeType + ', ' + a.data.byteLength + ' bytes)').join(', '));
         }
 
         if (!parsed.htmlBody && !parsed.body && parsed.attachments.length === 0) {
-          debug.warn('TNEF: Parsing succeeded but no content was extracted — the winmail.dat may use an unsupported format');
+          debug.warn('email', 'TNEF: Parsing succeeded but no content was extracted - the winmail.dat may use an unsupported format');
         }
 
         debug.groupEnd();
@@ -1886,13 +1950,13 @@ export function EmailViewer({
     const hasRealText = !!textValue;
 
     if (hasRealHtml || hasRealText) {
-      debug.log('Embedded RFC822: Outer email has real body content, not unwrapping');
+      debug.log('email', 'Embedded RFC822: Outer email has real body content, not unwrapping');
       return;
     }
 
-    debug.group('Embedded RFC822 Unwrapping');
-    debug.log('Found message/rfc822 attachment:', rfc822Att.name, 'blobId:', rfc822Att.blobId, 'size:', rfc822Att.size);
-    debug.log('Outer email body is empty, will unwrap embedded email');
+    debug.group('Embedded RFC822 Unwrapping', 'email');
+    debug.log('email', 'Found message/rfc822 attachment:', rfc822Att.name, 'blobId:', rfc822Att.blobId, 'size:', rfc822Att.size);
+    debug.log('email', 'Outer email body is empty, will unwrap embedded email');
 
     let cancelled = false;
 
@@ -1901,7 +1965,7 @@ export function EmailViewer({
         const blobBytes = await client!.fetchBlobArrayBuffer(rfc822Att!.blobId!);
         if (cancelled) { debug.groupEnd(); return; }
         if (blobBytes.byteLength === 0) {
-          debug.warn('Embedded RFC822: Fetched blob is empty');
+          debug.warn('email', 'Embedded RFC822: Fetched blob is empty');
           debug.groupEnd();
           return;
         }
@@ -1911,7 +1975,7 @@ export function EmailViewer({
         const parsed = await parser.parse(new Uint8Array(blobBytes));
         if (cancelled) { debug.groupEnd(); return; }
 
-        debug.log('Embedded RFC822 parsed — html:', !!parsed.html, '(' + (parsed.html?.length ?? 0) + ' chars)',
+        debug.log('email', 'Embedded RFC822 parsed - html:', !!parsed.html, '(' + (parsed.html?.length ?? 0) + ' chars)',
           ', text:', !!parsed.text, '(' + (parsed.text?.length ?? 0) + ' chars)',
           ', attachments:', parsed.attachments?.length ?? 0);
 
@@ -1923,7 +1987,7 @@ export function EmailViewer({
         }
         if (parsed.attachments && parsed.attachments.length > 0) {
           setEmbeddedEmailAttachments(parsed.attachments as PostalMimeAttachment[]);
-          debug.log('Embedded RFC822 attachments:', parsed.attachments.map(
+          debug.log('email', 'Embedded RFC822 attachments:', parsed.attachments.map(
             a => (a.filename || 'unnamed') + ' (' + a.mimeType + ')'
           ).join(', '));
         }
@@ -2020,11 +2084,15 @@ export function EmailViewer({
       }));
     }
 
+    const hasCalInvitation = calendarInvitationParsingEnabled && !!email && !!findCalendarAttachment(email);
     const jmapAttachments = (email?.attachments ?? [])
       // Hide winmail.dat when we have successfully extracted TNEF content or attachments
       .filter(att => !(tnefHtml || tnefText || tnefAttachments.length > 0) || !isTnefAttachment(att.name, att.type))
       // Hide message/rfc822 when we have unwrapped the embedded email
       .filter(att => !embeddedEmailUnwrapped || att.type !== 'message/rfc822')
+      // Hide calendar MIME parts (text/calendar, application/ics) when the invitation
+      // banner is shown - prevents raw ICS files appearing as spurious attachments.
+      .filter(att => !hasCalInvitation || !isCalendarMimeType(att.type))
       .map((attachment, index) => ({
         id: attachment.blobId || `${attachment.name || 'attachment'}-${index}`,
         name: attachment.name || null,
@@ -2055,7 +2123,7 @@ export function EmailViewer({
       }));
 
     return [...jmapAttachments, ...tnefExtracted, ...embeddedExtracted];
-  }, [email?.attachments, smimeDecryptedAttachments, tnefHtml, tnefText, tnefAttachments, embeddedEmailUnwrapped, embeddedEmailAttachments]);
+  }, [email?.attachments, smimeDecryptedAttachments, tnefHtml, tnefText, tnefAttachments, embeddedEmailUnwrapped, embeddedEmailAttachments, calendarInvitationParsingEnabled]);
 
   // Generate email source for viewing
   const generateEmailSource = (email: Email): string => {
@@ -2250,9 +2318,11 @@ export function EmailViewer({
         // Use shared sanitization config as base (more secure)
         const sanitizeConfig = { ...EMAIL_SANITIZE_CONFIG };
 
-        // Check if sender is trusted
+        // Check if sender is trusted (localStorage list or address book)
         const senderEmail = email.from?.[0]?.email?.toLowerCase();
-        const senderIsTrusted = senderEmail ? isSenderTrusted(senderEmail) : false;
+        const senderIsTrusted = senderEmail
+          ? isSenderTrusted(senderEmail) || (trustedSendersAddressBook && isTrustedAddressBookSender(senderEmail))
+          : false;
 
         // Block external content based on policy:
         // 'allow' = never block, 'block' = always block (unless trusted), 'ask' = block until user allows or trusted
@@ -2359,7 +2429,7 @@ export function EmailViewer({
       html: '<p style="color: var(--color-muted-foreground);">No content available</p>',
       isHtml: false
     };
-  }, [email, allowExternalContent, hasBlockedContent, externalContentPolicy, isSenderTrusted, cidBlobUrls]);
+  }, [email, allowExternalContent, hasBlockedContent, externalContentPolicy, isSenderTrusted, isTrustedAddressBookSender, trustedSendersAddressBook, cidBlobUrls]);
 
   // Override email content with S/MIME decrypted content when available
   const effectiveEmailContent = useMemo(() => {
@@ -2526,14 +2596,21 @@ export function EmailViewer({
 
     // If email has native dark mode, let it handle its own theming
     // Otherwise, use CSS filter inversion for dark mode (preserves layout)
+    // Re-invert leaf media elements so they appear normal.
+    // Container selectors (bgcolor, background, etc.) use :not(:has(...)) to avoid
+    // double re-inverting images nested inside those containers.
     const darkModeCSS = isDark && !emailHasNativeDarkMode ? `
       html { background: #1a1a1a; }
       body { filter: invert(1) hue-rotate(180deg); }
-      img, video, picture, svg, canvas, object, embed,
-      [style*="background-image"], [style*="background:"],
-      [background], [bgcolor],
-      td[background], table[background],
-      img[src], input[type="image"] {
+      img, video, svg, canvas, object, embed, input[type="image"] {
+        filter: invert(1) hue-rotate(180deg);
+      }
+      [style*="background-image"]:not(:has(img, video, svg, canvas, object, embed)),
+      [style*="background:"]:not(:has(img, video, svg, canvas, object, embed)),
+      [background]:not(:has(img, video, svg, canvas, object, embed)),
+      [bgcolor]:not(:has(img, video, svg, canvas, object, embed)),
+      td[background]:not(:has(img, video, svg, canvas, object, embed)),
+      table[background]:not(:has(img, video, svg, canvas, object, embed)) {
         filter: invert(1) hue-rotate(180deg);
       }
     ` : '';
@@ -2572,11 +2649,35 @@ export function EmailViewer({
           a.setAttribute('target', '_blank');
           a.setAttribute('rel', 'noopener noreferrer');
         });
+
+        // Dark mode: re-invert elements with stylesheet-defined background images
+        // (CSS attribute selectors only catch inline styles, not <style> block rules)
+        if (isDark && !emailHasNativeDarkMode) {
+          const win = doc.defaultView;
+          if (win) {
+            doc.body.querySelectorAll('*').forEach(el => {
+              const htmlEl = el as HTMLElement;
+              // Skip elements already handled by CSS attribute selectors
+              if (htmlEl.style.backgroundImage || htmlEl.style.background ||
+                  htmlEl.hasAttribute('background') || htmlEl.hasAttribute('bgcolor')) return;
+              // Skip leaf media elements (already re-inverted by CSS)
+              const tag = htmlEl.tagName;
+              if (['IMG', 'VIDEO', 'SVG', 'CANVAS', 'OBJECT', 'EMBED'].includes(tag)) return;
+              const computed = win.getComputedStyle(htmlEl);
+              if (computed.backgroundImage && computed.backgroundImage !== 'none') {
+                // Only re-invert if this container doesn't have media children
+                if (!htmlEl.querySelector('img, video, svg, canvas, object, embed')) {
+                  htmlEl.style.filter = 'invert(1) hue-rotate(180deg)';
+                }
+              }
+            });
+          }
+        }
       }
     } catch {
       // Cross-origin restrictions - iframe will still display content
     }
-  }, []);
+  }, [isDark, emailHasNativeDarkMode]);
 
   // Export email as .eml file
   const handleExportEmail = async () => {
@@ -2775,6 +2876,12 @@ export function EmailViewer({
           </div>
           <h3 className="text-xl font-semibold text-foreground mb-2">{t('no_conversation_selected')}</h3>
           <p className="text-muted-foreground">{t('no_conversation_description')}</p>
+          {onCompose && (
+            <Button onClick={onCompose} className="mt-6" title={t('compose_hint')}>
+              <PenSquare className="w-4 h-4 mr-2" />
+              {t('compose')}
+            </Button>
+          )}
         </div>
       </div>
     );
@@ -2790,7 +2897,7 @@ export function EmailViewer({
     <>
       {/* Left: Reply actions */}
       <div className={cn("flex items-center gap-0", showBackButton ? "sm:gap-1" : "sm:gap-0.5")}>
-        {showBackButton && isTablet && !tabletListVisible && onBack && (
+        {showBackButton && ((isTablet && !tabletListVisible) || (isFocusedMailLayout && !isMobile)) && onBack && (
           <Button
             variant="ghost"
             size="icon"
@@ -2805,7 +2912,7 @@ export function EmailViewer({
           <Button
             variant="default"
             size="sm"
-            onClick={onEditDraft}
+            onClick={() => onEditDraft()}
             className="sm:flex sm:flex-row sm:h-8 sm:gap-1.5 sm:py-0"
             title={t('tooltips.edit_draft')}
           >
@@ -2854,7 +2961,7 @@ export function EmailViewer({
         <PluginSlot name="toolbar-actions" />
       </div>
 
-      {/* Right: Organize actions — order: archive, delete, move, star, tag, spam, read state, print, view source */}
+      {/* Right: Organize actions - order: archive, delete, move, star, tag, spam, read state, print, view source */}
       <div className="flex items-center gap-0 sm:gap-0.5">
         {isLoading && (
           <div className="mr-2 flex items-center gap-1.5 text-muted-foreground">
@@ -2951,7 +3058,7 @@ export function EmailViewer({
           <span className="text-[10px] leading-tight sm:hidden">{isStarred ? t('tooltips.unstar') : t('tooltips.star')}</span>
         </Button>
 
-        {/* Tag Picker — hidden on mobile, overflows to More menu */}
+        {/* Tag Picker - hidden on mobile, overflows to More menu */}
         <div data-overflow-item data-overflow-priority="6" className="hidden sm:flex items-center">
         <div className="w-px h-5 bg-border mx-0.5" />
         <div ref={tagMenuRef} className="relative">
@@ -2959,43 +3066,51 @@ export function EmailViewer({
             onClick={() => { setTagMenuOpen(!tagMenuOpen); setMoreMenuOpen(false); setMoveMenuOpen(false); }}
             className={cn(
               "h-8 rounded hover:bg-muted flex items-center gap-1.5 px-2",
-              currentColor && "bg-muted/50"
+              currentColors.length > 0 && "bg-muted/50"
             )}
             title={t('set_color')}
           >
-            {(() => {
-              const kw = currentColor ? emailKeywords.find(k => k.id === currentColor) : null;
-              const dotClass = kw ? KEYWORD_PALETTE[kw.color]?.dot : null;
-              return dotClass ? (
+            {currentColors.length > 0 ? (
               <>
-                  <span className={cn("w-3 h-3 rounded-full", dotClass)} />
-                  {showToolbarLabels && <span className="text-xs font-medium text-foreground">{kw!.label}</span>}
+                <span className="flex items-center gap-0.5">
+                  {currentColors.slice(0, 3).map((tagId) => {
+                    const kw = emailKeywords.find(k => k.id === tagId) ?? { id: tagId, label: tagId, color: 'gray' };
+                    return <span key={tagId} className={cn("w-3 h-3 rounded-full", KEYWORD_PALETTE[kw.color]?.dot || 'bg-gray-500')} />;
+                  })}
+                </span>
+                {showToolbarLabels && currentColors.length === 1 && (
+                  <span className="text-xs font-medium text-foreground">
+                    {emailKeywords.find(k => k.id === currentColors[0])?.label ?? currentColors[0]}
+                  </span>
+                )}
               </>
             ) : (
               <>
                 <Tag className="w-4 h-4 text-muted-foreground" />
                 {showToolbarLabels && <span className="text-xs text-muted-foreground">{t('tag')}</span>}
               </>
-              );
-            })()}
+            )}
           </button>
           {tagMenuOpen && (
             <div className="absolute right-0 top-full mt-1 py-1 w-40 bg-background rounded-lg shadow-lg border border-border z-10">
-              {colorOptions.map((option) => (
+              {colorOptions.map((option) => {
+                const isActive = currentColors.includes(option.value);
+                return (
                   <button
                     key={option.value}
                     onClick={() => { if (email) onSetColorTag?.(email.id, option.value); setTagMenuOpen(false); }}
                     className={cn(
                       "w-full px-3 py-1.5 text-sm text-left hover:bg-muted flex items-center gap-2",
-                    currentColor === option.value && "bg-accent font-medium"
+                      isActive && "bg-accent font-medium"
                     )}
                   >
                     <span className={cn("w-3 h-3 rounded-full flex-shrink-0", option.color)} />
                     <span className="truncate">{option.name}</span>
-                  {currentColor === option.value && <Check className="w-3 h-3 ml-auto flex-shrink-0 text-foreground" />}
+                    {isActive && <Check className="w-3 h-3 ml-auto flex-shrink-0 text-foreground" />}
                   </button>
-              ))}
-              {currentColor && (
+                );
+              })}
+              {currentColors.length > 0 && (
                 <>
                   <div className="h-px bg-border my-1" />
                   <button
@@ -3012,7 +3127,7 @@ export function EmailViewer({
         </div>
         </div>
 
-        {/* Spam — hidden on mobile, overflows to More menu */}
+        {/* Spam - hidden on mobile, overflows to More menu */}
         {(onMarkAsSpam || onUndoSpam) && (
           <Button
             variant="ghost"
@@ -3034,7 +3149,7 @@ export function EmailViewer({
           </Button>
         )}
 
-        {/* Toggle read state — hidden on mobile, overflows to More menu */}
+        {/* Toggle read state - hidden on mobile, overflows to More menu */}
         <Button
           variant="ghost"
           size="sm"
@@ -3047,7 +3162,7 @@ export function EmailViewer({
           {isUnread ? <MailOpen className="w-4 h-4" /> : <Mail className="w-4 h-4" />}
         </Button>
 
-        {/* Print — hidden on mobile, overflows to More menu */}
+        {/* Print - hidden on mobile, overflows to More menu */}
         <Button
           variant="ghost"
           size="sm"
@@ -3061,7 +3176,7 @@ export function EmailViewer({
           {showToolbarLabels && <span className="hidden sm:inline text-sm">{t('print')}</span>}
         </Button>
 
-        {/* View source — hidden on mobile, overflows to More menu */}
+        {/* View source - hidden on mobile, overflows to More menu */}
         <Button
           variant="ghost"
           size="sm"
@@ -3089,7 +3204,7 @@ export function EmailViewer({
           </Button>
         )}
 
-        {/* More menu — click-based */}
+        {/* More menu - click-based */}
         <div ref={moreMenuRef} className="relative">
           <Button
             variant="ghost"
@@ -3135,7 +3250,7 @@ export function EmailViewer({
                 <Archive className="w-4 h-4" />
                 {t('archive')}
               </button>
-              {/* Overflow: move to folder — submenu */}
+              {/* Overflow: move to folder - submenu */}
               {moveTree.length > 0 && onMoveToMailbox && (
                 <div className={cn("relative", hiddenPriorities.has(5) ? "" : "sm:hidden")}
                   onMouseEnter={() => setMoreMenuSub('move')}
@@ -3187,7 +3302,7 @@ export function EmailViewer({
                   )}
                 </div>
               )}
-              {/* Overflow: tag — submenu */}
+              {/* Overflow: tag - submenu */}
               {colorOptions.length > 0 && (
                 <div className={cn("relative", hiddenPriorities.has(6) ? "" : "sm:hidden")}
                   onMouseEnter={() => setMoreMenuSub('tag')}
@@ -3203,21 +3318,24 @@ export function EmailViewer({
                   </button>
                   {moreMenuSub === 'tag' && (
                     <div className="absolute right-full top-0 mr-1 py-1 w-40 bg-background rounded-md shadow-lg border border-border z-10">
-                      {colorOptions.map((option) => (
+                      {colorOptions.map((option) => {
+                        const isActive = currentColors.includes(option.value);
+                        return (
                           <button
                             key={option.value}
                             onClick={() => { if (email) onSetColorTag?.(email.id, option.value); setMoreMenuOpen(false); setMoreMenuSub(null); }}
                             className={cn(
                               "w-full px-3 py-1.5 text-sm text-left hover:bg-muted flex items-center gap-2",
-                            currentColor === option.value && "bg-accent font-medium"
+                              isActive && "bg-accent font-medium"
                             )}
                           >
                             <span className={cn("w-3 h-3 rounded-full flex-shrink-0", option.color)} />
                             <span className="truncate">{option.name}</span>
-                          {currentColor === option.value && <Check className="w-3 h-3 ml-auto flex-shrink-0 text-foreground" />}
+                            {isActive && <Check className="w-3 h-3 ml-auto flex-shrink-0 text-foreground" />}
                           </button>
-                      ))}
-                      {currentColor && (
+                        );
+                      })}
+                      {currentColors.length > 0 && (
                         <>
                           <div className="h-px bg-border my-1" />
                           <button
@@ -3393,21 +3511,24 @@ export function EmailViewer({
             <>
               <div className="h-px bg-border my-1" />
               <div className="px-4 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider">{t('tag')}</div>
-              {colorOptions.map((option) => (
+              {colorOptions.map((option) => {
+                const isActive = currentColors.includes(option.value);
+                return (
                   <button
                     key={option.value}
                     onClick={() => { if (email) onSetColorTag?.(email.id, option.value); setMoreMenuOpen(false); }}
                     className={cn(
                       "w-full px-4 py-2.5 min-h-[44px] text-sm text-left hover:bg-muted flex items-center gap-3",
-                    currentColor === option.value && "bg-accent font-medium"
+                      isActive && "bg-accent font-medium"
                     )}
                   >
                     <span className={cn("w-3.5 h-3.5 rounded-full flex-shrink-0", option.color)} />
                     <span className="truncate">{option.name}</span>
-                  {currentColor === option.value && <Check className="w-4 h-4 ml-auto flex-shrink-0 text-foreground" />}
+                    {isActive && <Check className="w-4 h-4 ml-auto flex-shrink-0 text-foreground" />}
                   </button>
-              ))}
-              {currentColor && (
+                );
+              })}
+              {currentColors.length > 0 && (
                 <button
                   onClick={() => { if (email) onSetColorTag?.(email.id, null); setMoreMenuOpen(false); }}
                   className="w-full px-4 py-2.5 min-h-[44px] text-sm text-left hover:bg-muted flex items-center gap-3 text-muted-foreground"
@@ -3524,7 +3645,7 @@ export function EmailViewer({
         <div className="px-4 lg:px-6" style={{ paddingBlock: 'var(--density-header-py)' }}>
           <div className="flex items-start justify-between gap-2 lg:gap-4">
             {/* Back button (for below-subject mode on tablet) */}
-            {toolbarPosition === 'below-subject' && isTablet && !tabletListVisible && onBack && (
+            {toolbarPosition === 'below-subject' && ((isTablet && !tabletListVisible) || (isFocusedMailLayout && !isMobile)) && onBack && (
               <Button
                 variant="ghost"
                 size="icon"
@@ -3553,14 +3674,18 @@ export function EmailViewer({
                     )} />
                   </button>
                 )}
-                {/* Color tag dot */}
-                {currentColor && (() => {
-                  const kw = emailKeywords.find(k => k.id === currentColor);
-                  const dotClass = kw ? KEYWORD_PALETTE[kw.color]?.dot : null;
-                  return dotClass ? (
-                    <span className={cn("w-2.5 h-2.5 rounded-full flex-shrink-0", dotClass)} title={kw!.label} />
-                  ) : null;
-                })()}
+                {/* Color tag dots */}
+                {currentColors.length > 0 && (
+                  <span className="flex items-center gap-0.5">
+                    {currentColors.map((tagId) => {
+                      const kw = emailKeywords.find(k => k.id === tagId) ?? { id: tagId, label: tagId, color: 'gray' };
+                      const dotClass = KEYWORD_PALETTE[kw.color]?.dot || 'bg-gray-500';
+                      return (
+                        <span key={tagId} className={cn("w-2.5 h-2.5 rounded-full flex-shrink-0", dotClass)} title={kw.label} />
+                      );
+                    })}
+                  </span>
+                )}
                 {isImportant && (
                   <span className="px-1.5 lg:px-2 py-0.5 bg-warning/15 text-warning rounded-full text-xs font-medium whitespace-nowrap flex-shrink-0 self-center">
                     {t('important')}
@@ -3914,7 +4039,7 @@ export function EmailViewer({
                                   <div className="flex-1">
                                     <div className="text-xs font-medium text-gray-900 dark:text-gray-100 flex items-center gap-1">
                                       Spam Score
-                                      <InfoTooltip text="A score assigned by the server based on spam analysis. Lower is better — scores above 5 are likely spam" />
+                                      <InfoTooltip text="A score assigned by the server based on spam analysis. Lower is better - scores above 5 are likely spam" />
                                     </div>
                                     <div className={cn(
                                       "text-xs",
@@ -4403,7 +4528,7 @@ export function EmailViewer({
                 <Button
                   size="sm"
                   variant="outline"
-                  onClick={onEditDraft}
+                  onClick={() => onEditDraft()}
                   className="gap-1.5"
                 >
                   <EditIcon className="w-3.5 h-3.5" />
@@ -4430,7 +4555,7 @@ export function EmailViewer({
         {((hasBlockedContent && !allowExternalContent && externalContentPolicy !== 'allow') ||
           hasCalendarInvitation) && (
           <div className="border-b border-border bg-muted/30 isolate">
-            <div className="max-w-4xl mx-auto px-6 py-1.5">
+            <div className="max-w-6xl mx-auto px-6 py-1.5">
               <div className="flex flex-col gap-3 isolate">
                 {/* External Content Controls */}
                 {hasBlockedContent && !allowExternalContent && externalContentPolicy !== 'allow' && (
@@ -4449,7 +4574,11 @@ export function EmailViewer({
                         onClick={() => {
                           const senderEmail = email.from?.[0]?.email;
                           if (senderEmail) {
+                            if (trustedSendersAddressBook && client) {
+                              addToTrustedSendersBook(client, senderEmail).catch(console.error);
+                            } else {
                               addTrustedSender(senderEmail);
+                            }
                             setAllowExternalContent(true);
                           }
                         }}
@@ -4672,7 +4801,7 @@ export function EmailViewer({
           </button>
           {isDraft && onEditDraft ? (
             <button
-              onClick={onEditDraft}
+              onClick={() => onEditDraft()}
               className="flex flex-col items-center justify-center gap-1 py-2 px-3 min-w-[64px] min-h-[44px] shrink-0 text-primary active:text-primary/80 transition-colors duration-150"
               aria-label={t('tooltips.edit_draft')}
             >
@@ -4797,7 +4926,7 @@ export function EmailViewer({
           if (client && supportsSync) {
             createContact(client, contactData).then(() => toast.success('Contact added'));
           } else {
-            addLocalContact({ id: `local-${crypto.randomUUID()}`, addressBookIds: {}, ...contactData } as ContactCard);
+            addLocalContact({ id: `local-${generateUUID()}`, addressBookIds: {}, ...contactData } as ContactCard);
             toast.success('Contact added');
           }
         }}

components/email/recipient-popover.tsx

@@ -14,7 +14,7 @@ interface RecipientPopoverProps {
   email: string;
   /** Display label override (e.g. "me") */
   displayLabel?: string;
-  /** Called when user clicks "View contact" — receives the contact and email */
+  /** Called when user clicks "View contact" - receives the contact and email */
   onViewContact?: (contact: ContactCard | null, email: string) => void;
   className?: string;
 }
@@ -93,6 +93,18 @@ export function RecipientPopover({ name, email, displayLabel, onViewContact, cla
     return () => document.removeEventListener("keydown", handler);
   }, [isOpen]);
 
+  // Close on scroll so the popover does not float while content moves.
+  useEffect(() => {
+    if (!isOpen) return;
+    const handler = () => handleClose();
+    document.addEventListener("scroll", handler, true);
+    window.addEventListener("resize", handler);
+    return () => {
+      document.removeEventListener("scroll", handler, true);
+      window.removeEventListener("resize", handler);
+    };
+  }, [isOpen]);
+
   const handleViewContact = () => {
     if (onViewContact) {
       onViewContact(contact ?? null, email);

components/email/rich-text-editor.tsx

@@ -118,6 +118,7 @@ export function RichTextEditor({
         );
         if (imageFiles.length === 0) return false;
         event.preventDefault();
+        event.stopPropagation();
         for (const file of imageFiles) {
           upload(file).then((url) => {
             if (url) {

components/email/smime-status-banner.tsx

@@ -30,6 +30,12 @@ export function SmimeStatusBanner({ status, onUnlockKey, className }: SmimeStatu
           text: t('unlock_key_desc'),
           variant: 'warning',
         });
+      } else if (status.decryptionError === 'no-key') {
+        items.push({
+          icon: <Lock className="w-4 h-4" />,
+          text: t('status_encrypted_no_key'),
+          variant: 'warning',
+        });
       } else {
         items.push({
           icon: <ShieldX className="w-4 h-4" />,
@@ -49,7 +55,13 @@ export function SmimeStatusBanner({ status, onUnlockKey, className }: SmimeStatu
   // Signature status
   if (status.isSigned) {
     if (status.signatureValid === true) {
-      if (status.signerEmailMatch === false) {
+      if (status.selfSigned) {
+        items.push({
+          icon: <AlertTriangle className="w-4 h-4" />,
+          text: t('status_signed_self_signed'),
+          variant: 'warning',
+        });
+      } else if (status.signerEmailMatch === false) {
         items.push({
           icon: <AlertTriangle className="w-4 h-4" />,
           text: t('status_signed_mismatch'),

components/email/thread-conversation-view.tsx

@@ -31,6 +31,7 @@ import {
 } from "lucide-react";
 import { useTranslations } from "next-intl";
 import { useSettingsStore } from "@/stores/settings-store";
+import { useContactStore } from "@/stores/contact-store";
 import { useAuthStore } from "@/stores/auth-store";
 import { isFilePreviewable } from "@/lib/file-preview";
 
@@ -84,6 +85,10 @@ export function ThreadConversationView({
   const externalContentPolicy = useSettingsStore((state) => state.externalContentPolicy);
   const addTrustedSender = useSettingsStore((state) => state.addTrustedSender);
   const isSenderTrusted = useSettingsStore((state) => state.isSenderTrusted);
+  const trustedSendersAddressBook = useSettingsStore((state) => state.trustedSendersAddressBook);
+  const isTrustedAddressBookSender = useContactStore((state) => state.isTrustedAddressBookSender);
+  const addToTrustedSendersBook = useContactStore((state) => state.addToTrustedSendersBook);
+  const { client } = useAuthStore();
 
   // Track which emails are expanded (most recent by default)
   const [expandedIds, setExpandedIds] = useState<Set<string>>(new Set());
@@ -164,7 +169,9 @@ export function ThreadConversationView({
         <div className="space-y-3" style={{ padding: 'var(--density-card-p)' }}>
           {emails.map((email, index) => {
             const senderEmail = email.from?.[0]?.email?.toLowerCase();
-            const senderIsTrusted = senderEmail ? isSenderTrusted(senderEmail) : false;
+            const senderIsTrusted = senderEmail
+              ? isSenderTrusted(senderEmail) || (trustedSendersAddressBook && isTrustedAddressBookSender(senderEmail))
+              : false;
             return (
               <EmailCard
                 key={email.id}
@@ -175,7 +182,11 @@ export function ThreadConversationView({
                 onToggleExpanded={() => toggleExpanded(email.id)}
                 onAllowExternal={() => toggleAllowExternal(email.id)}
                 onTrustSender={senderEmail ? () => {
+                  if (trustedSendersAddressBook && client) {
+                    addToTrustedSendersBook(client, senderEmail).catch(console.error);
+                  } else {
                     addTrustedSender(senderEmail);
+                  }
                   toggleAllowExternal(email.id);
                 } : undefined}
                 onReply={onReply ? () => onReply(email) : undefined}

components/email/thread-list-item.tsx

@@ -9,7 +9,8 @@ import { Paperclip, Star, Circle, ChevronRight, ChevronDown, Loader2, MessageSqu
 import { useSettingsStore, KEYWORD_PALETTE } from "@/stores/settings-store";
 import { useUIStore } from "@/stores/ui-store";
 import { useEmailStore } from "@/stores/email-store";
-import { getThreadColorTag, getEmailColorTag } from "@/lib/thread-utils";
+import { useAccountStore } from "@/stores/account-store";
+import { getThreadColorTag, getEmailColorTags } from "@/lib/thread-utils";
 import { useEmailDrag } from "@/hooks/use-email-drag";
 import { useLongPress } from "@/hooks/use-long-press";
 import { ThreadEmailItem } from "./thread-email-item";
@@ -55,15 +56,25 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
     const isStarred = email.keywords?.$flagged;
     const isAnswered = email.keywords?.$answered;
     const isForwarded = email.keywords?.$forwarded;
-    const sender = email.from?.[0];
-    const { selectedMailbox, selectedEmailIds, toggleEmailSelection, selectRangeEmails, clearSelection } = useEmailStore();
+    const { selectedMailbox, mailboxes, selectedEmailIds, toggleEmailSelection, selectRangeEmails, clearSelection } = useEmailStore();
+    // In Sent/Drafts folders, show recipient instead of sender (which is always "me")
+    const currentMailboxRole = mailboxes.find(mb => mb.id === selectedMailbox)?.role;
+    const showRecipient = currentMailboxRole === 'sent' || currentMailboxRole === 'drafts';
+    const sender = showRecipient ? (email.to?.[0] ?? email.from?.[0]) : email.from?.[0];
     const emailKeywords = useSettingsStore((state) => state.emailKeywords);
     const density = useSettingsStore((state) => state.density);
+    const mailLayout = useSettingsStore((state) => state.mailLayout);
+    const isUnifiedView = useEmailStore((state) => state.isUnifiedView);
+    const getAccountById = useAccountStore((state) => state.getAccountById);
+    const accountColor = email.accountId ? getAccountById(email.accountId)?.avatarColor : undefined;
     const isChecked = selectedEmailIds.has(email.id);
+    const isFocusedMailLayout = mailLayout === 'focus';
+    const inlinePreview = showPreview && email.preview ? ` ${email.preview}` : '';
 
-    // Resolve color and keyword definition from keyword definitions if not passed directly
-    const tagId = getEmailColorTag(email.keywords);
-    const resolvedKeywordDef = tagId ? emailKeywords.find(k => k.id === tagId) : null;
+    // Resolve color tags using keyword definitions; unknown tags fall back to gray
+    const tagIds = getEmailColorTags(email.keywords);
+    const resolvedKeywordDefs = tagIds.map(id => emailKeywords.find(k => k.id === id) ?? { id, label: id, color: 'gray' });
+    const resolvedKeywordDef = resolvedKeywordDefs[0] ?? null;
     const resolvedColorTag = (() => {
       if (colorTag) return colorTag;
       return resolvedKeywordDef ? KEYWORD_PALETTE[resolvedKeywordDef.color]?.bg ?? null : null;
@@ -131,15 +142,19 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
         )}
         onClick={handleClick}
         onContextMenu={handleContextMenu}
-        style={{ minHeight: 'var(--list-item-height)' }}
+        style={{ minHeight: isFocusedMailLayout ? undefined : 'var(--list-item-height)' }}
+      >
+        <div
+          className={cn('px-3', isFocusedMailLayout ? 'flex items-center py-2.5' : 'flex items-start')}
+          style={isFocusedMailLayout ? { gap: '12px' } : { gap: 'var(--density-item-gap)', paddingBlock: 'var(--density-item-py)' }}
         >
-        <div className="flex items-start px-3" style={{ gap: 'var(--density-item-gap)', paddingBlock: 'var(--density-item-py)' }}>
           {/* Checkbox - only visible when in selection mode */}
           {selectedEmailIds.size > 0 && (
             <button
               onClick={handleCheckboxClick}
               className={cn(
-                "p-3 lg:p-1 rounded mt-2 flex-shrink-0 transition-all duration-200",
+                "p-3 lg:p-1 rounded flex-shrink-0 transition-all duration-200",
+                !isFocusedMailLayout && 'mt-2',
                 "hover:bg-muted/50 hover:scale-110",
                 "active:scale-95",
                 "animate-in fade-in zoom-in-95 duration-150",
@@ -160,7 +175,7 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
             </div>
           )}
 
-          {density !== 'extra-compact' && (
+          {!isFocusedMailLayout && density !== 'extra-compact' && (
             <Avatar
               name={sender?.name}
               email={sender?.email}
@@ -170,8 +185,67 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
           )}
 
           <div className="flex-1 min-w-0">
+            {isFocusedMailLayout ? (
+              <div className="flex items-center justify-between gap-3">
+                <div className="flex min-w-0 flex-1 items-center gap-3">
+                  {isUnifiedView && email.accountId && accountColor && (
+                    <span
+                      className="w-2 h-2 rounded-full flex-shrink-0"
+                      style={{ backgroundColor: accountColor }}
+                      title={email.accountLabel}
+                    />
+                  )}
+                  <span className={cn(
+                    'w-32 shrink-0 truncate text-sm lg:w-40',
+                    isUnread ? 'font-semibold text-foreground' : 'font-medium text-foreground/80'
+                  )}>
+                    {sender?.name || sender?.email || 'Unknown'}
+                  </span>
+                  <div className="flex min-w-0 flex-1 items-center gap-2 text-sm">
+                    <span className={cn(
+                      'shrink-0 truncate',
+                      isUnread ? 'font-semibold text-foreground' : 'text-foreground/90'
+                    )}>
+                      {email.subject || '(no subject)'}
+                    </span>
+                    {inlinePreview && (
+                      <span className="min-w-0 truncate text-muted-foreground">{inlinePreview}</span>
+                    )}
+                  </div>
+                </div>
+                <div className="flex items-center gap-2.5 shrink-0">
+                  {isStarred && <Star className="w-3.5 h-3.5 fill-amber-400 text-amber-400" />}
+                  {isAnswered && !isForwarded && <Reply className="w-3.5 h-3.5 text-muted-foreground" />}
+                  {isForwarded && !isAnswered && <Forward className="w-3.5 h-3.5 text-muted-foreground" />}
+                  {isAnswered && isForwarded && (
+                    <>
+                      <Reply className="w-3.5 h-3.5 text-muted-foreground" />
+                      <Forward className="w-3.5 h-3.5 text-muted-foreground" />
+                    </>
+                  )}
+                  {email.hasAttachment && <Paperclip className="w-3.5 h-3.5 text-muted-foreground" />}
+                  {resolvedKeywordDefs.map((kd) => (
+                    <span key={kd.id} className={cn('h-2.5 w-2.5 rounded-full', KEYWORD_PALETTE[kd.color]?.dot || 'bg-gray-400')} />
+                  ))}
+                  <span className={cn(
+                    'text-xs tabular-nums',
+                    isUnread ? 'text-foreground font-semibold' : 'text-muted-foreground'
+                  )}>
+                    {formatDate(email.receivedAt)}
+                  </span>
+                </div>
+              </div>
+            ) : (
+              <>
                 <div className="flex items-center justify-between gap-2 mb-1">
                   <div className="flex items-center gap-2 min-w-0 flex-1">
+                    {isUnifiedView && email.accountId && accountColor && (
+                      <span
+                        className="w-2 h-2 rounded-full flex-shrink-0"
+                        style={{ backgroundColor: accountColor }}
+                        title={email.accountLabel}
+                      />
+                    )}
                     <span className={cn(
                       "truncate text-sm",
                       isUnread
@@ -202,15 +276,15 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
                     </div>
                   </div>
                   <div className="flex items-center gap-1.5 flex-shrink-0">
-                {resolvedKeywordDef && (
-                  <span className={cn(
+                    {resolvedKeywordDefs.map((kd) => (
+                      <span key={kd.id} className={cn(
                         "inline-flex items-center gap-1 px-1.5 py-0.5 text-[10px] font-medium rounded-full",
-                    KEYWORD_PALETTE[resolvedKeywordDef.color]?.bg || "bg-muted"
+                        KEYWORD_PALETTE[kd.color]?.bg || "bg-muted"
                       )}>
-                    <span className={cn("w-1.5 h-1.5 rounded-full", KEYWORD_PALETTE[resolvedKeywordDef.color]?.dot || "bg-gray-400")} />
-                    {resolvedKeywordDef.label}
+                        <span className={cn("w-1.5 h-1.5 rounded-full", KEYWORD_PALETTE[kd.color]?.dot || "bg-gray-400")} />
+                        {kd.label}
                       </span>
-                )}
+                    ))}
                     <span className={cn(
                       "text-xs tabular-nums",
                       isUnread
@@ -241,12 +315,15 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
                     {email.preview || "No preview available"}
                   </p>
                 )}
+              </>
+            )}
           </div>
         </div>
 
         {/* Hover Quick Actions */}
         <EmailHoverActions
           email={email}
+          backgroundClassName={resolvedColorTag ? resolvedColorTag : (selected ? "bg-accent" : "bg-muted")}
           onToggleStar={onToggleStar}
           onMarkAsRead={onMarkAsRead}
           onDelete={onDelete}
@@ -280,10 +357,24 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
     const t = useTranslations('threads');
     const showPreview = useSettingsStore((state) => state.showPreview);
     const density = useSettingsStore((state) => state.density);
+    const mailLayout = useSettingsStore((state) => state.mailLayout);
     const isMobile = useUIStore((state) => state.isMobile);
     const { latestEmail, participantNames, hasUnread, hasStarred, hasAttachment, hasAnswered, hasForwarded, emailCount } = thread;
+    const isFocusedMailLayout = mailLayout === 'focus';
+    const inlinePreview = showPreview && latestEmail.preview ? ` ${latestEmail.preview}` : '';
 
-    const { selectedMailbox, selectedEmailIds, toggleEmailSelection, selectRangeEmails, clearSelection } = useEmailStore();
+    const { selectedMailbox, mailboxes, selectedEmailIds, toggleEmailSelection, selectRangeEmails, clearSelection, isUnifiedView } = useEmailStore();
+    const getAccountById = useAccountStore((state) => state.getAccountById);
+    const threadAccountColor = latestEmail.accountId ? getAccountById(latestEmail.accountId)?.avatarColor : undefined;
+    // In Sent/Drafts folders, show recipient instead of sender (which is always "me")
+    const currentMailboxRole = mailboxes.find(mb => mb.id === selectedMailbox)?.role;
+    const showRecipient = currentMailboxRole === 'sent' || currentMailboxRole === 'drafts';
+    const displayNames = showRecipient
+      ? Array.from(new Set(
+          thread.emails.flatMap(e => (e.to ?? []).map(r => r.name || r.email.split('@')[0]))
+        )).slice(0, 4)
+      : participantNames;
+    const avatarPerson = showRecipient ? latestEmail.to?.[0] : latestEmail.from?.[0];
 
     const { dragHandlers, isDragging: isThreadDragging } = useEmailDrag({
       email: latestEmail,
@@ -304,7 +395,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
 
     const threadColor = getThreadColorTag(thread.emails);
     const emailKeywordDefs = useSettingsStore((state) => state.emailKeywords);
-    const keywordDef = threadColor ? emailKeywordDefs.find(k => k.id === threadColor) : null;
+    const keywordDef = threadColor ? (emailKeywordDefs.find(k => k.id === threadColor) ?? { id: threadColor, label: threadColor, color: 'gray' }) : null;
     const colorTag = keywordDef ? KEYWORD_PALETTE[keywordDef.color]?.bg ?? null : null;
 
     const isSelected = selectedEmailId === latestEmail.id ||
@@ -405,15 +496,19 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
           )}
           onClick={handleHeaderClick}
           onContextMenu={handleContextMenu}
-          style={{ minHeight: 'var(--list-item-height)' }}
+          style={{ minHeight: isFocusedMailLayout ? undefined : 'var(--list-item-height)' }}
+        >
+          <div
+            className={cn('px-3', isFocusedMailLayout ? 'flex items-center py-2.5' : 'flex items-start')}
+            style={isFocusedMailLayout ? { gap: '12px' } : { gap: 'var(--density-item-gap)', paddingBlock: 'var(--density-item-py)' }}
           >
-          <div className="flex items-start px-3" style={{ gap: 'var(--density-item-gap)', paddingBlock: 'var(--density-item-py)' }}>
             {/* Checkbox for thread selection - only visible when in selection mode */}
             {selectedEmailIds.size > 0 && (
               <button
                 onClick={handleThreadCheckboxClick}
                 className={cn(
-                  "p-3 lg:p-1 rounded mt-2 flex-shrink-0 transition-all duration-200",
+                  "p-3 lg:p-1 rounded flex-shrink-0 transition-all duration-200",
+                  !isFocusedMailLayout && 'mt-2',
                   "hover:bg-muted/50 hover:scale-110",
                   "active:scale-95",
                   "animate-in fade-in zoom-in-95 duration-150",
@@ -428,7 +523,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
               </button>
             )}
 
-            {!isMobile && (
+            {!isMobile && !isFocusedMailLayout && (
               <button
                 data-expand-toggle
                 onClick={(e) => {
@@ -460,25 +555,94 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
               </div>
             )}
 
-            {density !== 'extra-compact' && (
+            {!isFocusedMailLayout && density !== 'extra-compact' && (
               <Avatar
-                name={latestEmail.from?.[0]?.name}
-                email={latestEmail.from?.[0]?.email}
+                name={avatarPerson?.name}
+                email={avatarPerson?.email}
                 size="md"
                 className="flex-shrink-0 shadow-sm"
               />
             )}
 
             <div className="flex-1 min-w-0">
+              {isFocusedMailLayout ? (
+                <div className="flex items-center justify-between gap-3">
+                  <div className="flex min-w-0 flex-1 items-center gap-3">
+                    {isUnifiedView && latestEmail.accountId && threadAccountColor && (
+                      <span
+                        className="w-2 h-2 rounded-full flex-shrink-0"
+                        style={{ backgroundColor: threadAccountColor }}
+                        title={latestEmail.accountLabel}
+                      />
+                    )}
+                    <span className={cn(
+                      'w-32 shrink-0 truncate text-sm lg:w-44',
+                      hasUnread ? 'font-semibold text-foreground' : 'font-medium text-foreground/80'
+                    )}>
+                      {displayNames.join(', ')}
+                    </span>
+                    <span
+                      className={cn(
+                        'inline-flex shrink-0 items-center gap-0.5 rounded-full px-1.5 py-0.5 text-xs font-medium',
+                        hasUnread ? 'bg-primary text-primary-foreground' : 'bg-muted text-muted-foreground'
+                      )}
+                      title={t('messages_tooltip', { count: emailCount })}
+                    >
+                      <MessageSquare className="w-3 h-3" />
+                      {emailCount}
+                    </span>
+                    <div className="flex min-w-0 flex-1 items-center gap-2 text-sm">
+                      <span className={cn(
+                        'shrink-0 truncate',
+                        hasUnread ? 'font-semibold text-foreground' : 'text-foreground/90'
+                      )}>
+                        {latestEmail.subject || '(no subject)'}
+                      </span>
+                      {inlinePreview && (
+                        <span className="min-w-0 truncate text-muted-foreground">{inlinePreview}</span>
+                      )}
+                    </div>
+                  </div>
+                  <div className="flex items-center gap-2.5 shrink-0">
+                    {hasStarred && <Star className="w-3.5 h-3.5 fill-amber-400 text-amber-400" />}
+                    {hasAnswered && !hasForwarded && <Reply className="w-3.5 h-3.5 text-muted-foreground" />}
+                    {hasForwarded && !hasAnswered && <Forward className="w-3.5 h-3.5 text-muted-foreground" />}
+                    {hasAnswered && hasForwarded && (
+                      <>
+                        <Reply className="w-3.5 h-3.5 text-muted-foreground" />
+                        <Forward className="w-3.5 h-3.5 text-muted-foreground" />
+                      </>
+                    )}
+                    {hasAttachment && <Paperclip className="w-3.5 h-3.5 text-muted-foreground" />}
+                    {keywordDef && (
+                      <span className={cn('h-2.5 w-2.5 rounded-full', KEYWORD_PALETTE[keywordDef.color]?.dot || 'bg-gray-400')} />
+                    )}
+                    <span className={cn(
+                      'text-xs tabular-nums',
+                      hasUnread ? 'text-foreground font-semibold' : 'text-muted-foreground'
+                    )}>
+                      {formatDate(latestEmail.receivedAt)}
+                    </span>
+                  </div>
+                </div>
+              ) : (
+                <>
                   <div className="flex items-center justify-between gap-2 mb-1">
                     <div className="flex items-center gap-2 min-w-0 flex-1">
+                      {isUnifiedView && latestEmail.accountId && threadAccountColor && (
+                        <span
+                          className="w-2 h-2 rounded-full flex-shrink-0"
+                          style={{ backgroundColor: threadAccountColor }}
+                          title={latestEmail.accountLabel}
+                        />
+                      )}
                       <span className={cn(
                         "truncate text-sm",
                         hasUnread
                           ? "font-bold text-foreground"
                           : "font-medium text-muted-foreground"
                       )}>
-                    {participantNames.join(", ")}
+                        {displayNames.join(", ")}
                       </span>
                       <span
                         className={cn(
@@ -553,12 +717,15 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
                       {latestEmail.preview || "No preview available"}
                     </p>
                   )}
+                </>
+              )}
             </div>
           </div>
 
           {/* Hover Quick Actions for thread header */}
           <EmailHoverActions
             email={latestEmail}
+            backgroundClassName={colorTag ? colorTag : (isSelected ? "bg-accent" : "bg-muted")}
             onToggleStar={onToggleStar ? () => onToggleStar(latestEmail) : undefined}
             onMarkAsRead={onMarkAsRead ? (read) => onMarkAsRead(latestEmail, read) : undefined}
             onDelete={onDelete ? () => onDelete(latestEmail) : undefined}
@@ -568,7 +735,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
           />
         </div>
 
-        {isExpanded && !isMobile && (
+        {isExpanded && !isMobile && !isFocusedMailLayout && (
           <div className="bg-muted/20 animate-in slide-in-from-top-2 duration-200">
             {isLoading ? (
               <div className="py-4 flex items-center justify-center text-sm text-muted-foreground">

components/files/file-browser.tsx

@@ -412,7 +412,7 @@ export function FileBrowser({
   // Filter and sort resources
   const displayResources = useMemo(() => {
     let filtered = resources;
-    // In sidebar mode, folders are shown in the sidebar tree — hide them from the main list
+    // In sidebar mode, folders are shown in the sidebar tree - hide them from the main list
     if (folderLayout === "sidebar") {
       filtered = filtered.filter(r => !r.isDirectory);
     }
@@ -837,7 +837,7 @@ export function FileBrowser({
   return (
     <div
       ref={containerRef}
-      className="flex flex-col h-full"
+      className="flex flex-col flex-1 min-h-0"
       onClick={handleContainerClick}
       onDragOver={handleDragOver}
       onDragLeave={handleDragLeave}
@@ -1466,7 +1466,7 @@ export function FileBrowser({
                     </div>
                   </td>
                   <td className="px-4 py-2.5 text-muted-foreground hidden md:table-cell tabular-nums">
-                    {resource.isDirectory ? "—" : formatFileSize(resource.contentLength)}
+                    {resource.isDirectory ? "-" : formatFileSize(resource.contentLength)}
                   </td>
                   <td className="px-4 py-2.5 text-muted-foreground hidden lg:table-cell tabular-nums">
                     {formatDate(resource.lastModified)}

components/files/file-preview-modal.tsx

@@ -223,6 +223,7 @@ export function FilePreviewModal({ name, onClose, onDownload, getFileContent }:
         {!loading && !error && fileType === "pdf" && objectUrl && (
           <iframe
             src={objectUrl}
+            sandbox="allow-same-origin"
             className="w-full max-w-5xl h-full rounded-lg bg-white"
             title={name}
           />

components/files/folder-tree-sidebar.tsx

@@ -58,7 +58,7 @@ export function FolderTreeSidebar({ currentPath, onNavigate, listByParentId, wid
           };
         });
 
-      // Don't cache empty root results — empty root likely means client wasn't ready yet
+      // Don't cache empty root results - empty root likely means client wasn't ready yet
       if (folders.length > 0 || parentId !== null) {
         setChildrenCache(prev => new Map(prev).set(cacheKey, folders));
       }

components/filters/filter-rule-modal.tsx

@@ -16,7 +16,8 @@ import type {
   FilterActionType,
 } from "@/lib/jmap/sieve-types";
 import type { Mailbox } from "@/lib/jmap/types";
-import { buildMailboxTree, flattenMailboxTree, type MailboxNode } from "@/lib/utils";
+import { buildMailboxTree, flattenMailboxTree, type MailboxNode, generateUUID } from "@/lib/utils";
+import { useSettingsStore } from "@/stores/settings-store";
 
 interface FilterRuleModalProps {
   rule?: FilterRule;
@@ -58,6 +59,7 @@ export function FilterRuleModal({
 }: FilterRuleModalProps) {
   const t = useTranslations("settings.filters");
   const isEdit = !!rule;
+  const emailKeywords = useSettingsStore((state) => state.emailKeywords);
 
   const [name, setName] = useState(rule?.name || "");
   const [matchType, setMatchType] = useState<"all" | "any">(rule?.matchType || "all");
@@ -109,7 +111,7 @@ export function FilterRuleModal({
     }
 
     onSave({
-      id: rule?.id || crypto.randomUUID(),
+      id: rule?.id || generateUUID(),
       name: trimmedName,
       enabled: rule?.enabled ?? true,
       matchType,
@@ -375,12 +377,17 @@ export function FilterRuleModal({
                   )}
 
                   {action.type === "add_label" && (
-                    <Input
+                    <select
                       value={action.value || ""}
                       onChange={(e) => updateAction(index, { value: e.target.value })}
-                      placeholder={t("label_placeholder")}
-                      className="flex-1 min-w-[140px]"
-                    />
+                      className={`${selectClass} flex-1 min-w-[140px]`}
+                      aria-label={t("label_placeholder")}
+                    >
+                      <option value="">{t("label_placeholder")}</option>
+                      {emailKeywords.map((kw) => (
+                        <option key={kw.id} value={kw.id}>{kw.label}</option>
+                      ))}
+                    </select>
                   )}
 
                   <button

components/identity/identity-manager-modal.tsx

@@ -14,6 +14,10 @@ function useSyncIdentities() {
   const syncIdentities = useAuthStore((state) => state.syncIdentities);
   return syncIdentities;
 }
+
+function useRefreshIdentities() {
+  return useAuthStore((state) => state.refreshIdentities);
+}
 import type { Identity, EmailAddress } from '@/lib/jmap/types';
 import { toast } from '@/stores/toast-store';
 import { useFocusTrap } from '@/hooks/use-focus-trap';
@@ -49,6 +53,15 @@ export function IdentityManagerModal({ isOpen, onClose }: IdentityManagerModalPr
   const setPreferredPrimary = useIdentityStore((state) => state.setPreferredPrimary);
   const syncIdentities = useSyncIdentities();
 
+  const refreshIdentitiesFromServer = useRefreshIdentities();
+
+  // Refresh identities from server whenever the modal is opened
+  useEffect(() => {
+    if (isOpen) {
+      refreshIdentitiesFromServer();
+    }
+  }, [isOpen, refreshIdentitiesFromServer]);
+
   const [editingId, setEditingId] = useState<string | null>(null);
   const [isCreating, setIsCreating] = useState(false);
   const [deletingId, setDeletingId] = useState<string | null>(null);

components/layout/navigation-rail.tsx

@@ -2,7 +2,7 @@
 
 import { useState, useRef, useEffect, useCallback } from "react";
 import { createPortal } from "react-dom";
-import { Mail, Calendar, BookUser, HardDrive, Settings, Keyboard, Plus, Shield } from "lucide-react";
+import { Mail, Calendar, BookUser, HardDrive, Settings, Keyboard, Plus, Shield, LogOut, Check } from "lucide-react";
 import { AccountSwitcher } from "./account-switcher";
 import { icons as lucideIcons, type LucideIcon } from "lucide-react";
 import { useConfig } from "@/hooks/use-config";
@@ -16,8 +16,13 @@ import { useWebDAVStore } from "@/stores/webdav-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { usePolicyStore } from "@/stores/policy-store";
 import { useAuthStore } from "@/stores/auth-store";
+import { useAccountStore } from "@/stores/account-store";
+import { getActiveAccountSlotHeaders } from "@/lib/auth/active-account-slot";
+import { getInitials } from "@/lib/account-utils";
 import { cn, formatFileSize } from "@/lib/utils";
 import { PluginSlot } from "@/components/plugins/plugin-slot";
+import { KeyboardShortcutsModal } from "@/components/keyboard-shortcuts-modal";
+import { apiFetch } from "@/lib/browser-navigation";
 
 interface NavItem {
   id: string;
@@ -164,27 +169,67 @@ export function NavigationRail({
   const { mailboxes } = useEmailStore();
   const { supportsWebDAV } = useWebDAVStore();
   const sidebarApps = useSettingsStore((s) => s.sidebarApps);
+  const showRailAccountList = useSettingsStore((s) => s.showRailAccountList);
   const sidebarAppsEnabled = usePolicyStore((s) => s.isFeatureEnabled('sidebarAppsEnabled'));
+  const filesEnabled = usePolicyStore((s) => s.isFeatureEnabled('filesEnabled'));
   const visibleSidebarApps = sidebarAppsEnabled ? sidebarApps : [];
   const inboxUnread = mailboxes.find(m => m.role === "inbox")?.unreadEmails || 0;
   const [isStalwartAdmin, setIsStalwartAdmin] = useState(false);
 
+  // Account list for rail
+  const accounts = useAccountStore((s) => s.accounts);
+  const activeAccountId = useAccountStore((s) => s.activeAccountId);
+  const switchAccount = useAuthStore((s) => s.switchAccount);
+  const logout = useAuthStore((s) => s.logout);
+  const logoutAll = useAuthStore((s) => s.logoutAll);
+  const [logoutMenuOpen, setLogoutMenuOpen] = useState(false);
+  const logoutBtnRef = useRef<HTMLButtonElement>(null);
+  const logoutPopoverRef = useRef<HTMLDivElement>(null);
+  const [logoutPopoverStyle, setLogoutPopoverStyle] = useState<React.CSSProperties>({});
+  const [showShortcutsModal, setShowShortcutsModal] = useState(false);
+
+  const updateLogoutPosition = useCallback(() => {
+    if (!logoutBtnRef.current) return;
+    const rect = logoutBtnRef.current.getBoundingClientRect();
+    setLogoutPopoverStyle({
+      position: "fixed",
+      left: rect.right + 8,
+      bottom: Math.max(8, window.innerHeight - rect.bottom),
+    });
+  }, []);
+
+  useEffect(() => {
+    if (!logoutMenuOpen) return;
+    updateLogoutPosition();
+    const handleClickOutside = (e: MouseEvent) => {
+      if (
+        logoutBtnRef.current?.contains(e.target as Node) ||
+        logoutPopoverRef.current?.contains(e.target as Node)
+      ) return;
+      setLogoutMenuOpen(false);
+    };
+    const handleEscape = (e: KeyboardEvent) => {
+      if (e.key === "Escape") setLogoutMenuOpen(false);
+    };
+    document.addEventListener("mousedown", handleClickOutside);
+    document.addEventListener("keydown", handleEscape);
+    return () => {
+      document.removeEventListener("mousedown", handleClickOutside);
+      document.removeEventListener("keydown", handleEscape);
+    };
+  }, [logoutMenuOpen, updateLogoutPosition]);
+
   useEffect(() => {
     let cancelled = false;
-    const { client } = useAuthStore.getState();
-    if (!client) return;
-    const headers: Record<string, string> = {
-      'Authorization': client.getAuthHeader(),
-      'X-JMAP-Server-URL': client.getServerUrl(),
-      'X-JMAP-Username': client.getUsername(),
-    };
-    fetch('/api/admin/stalwart-check', { headers })
+    const headers = getActiveAccountSlotHeaders();
+    if (!headers['X-JMAP-Cookie-Slot']) return;
+    apiFetch('/api/admin/stalwart-check', { headers })
       .then(res => res.json())
       .then(data => {
         if (!cancelled && data.isStalwartAdmin) {
           setIsStalwartAdmin(true);
           // Pre-create admin session so /admin works even after full page navigation
-          fetch('/api/admin/auth', {
+          apiFetch('/api/admin/auth', {
             method: 'POST',
             headers: { 'Content-Type': 'application/json', ...headers },
             body: JSON.stringify({ stalwartAuth: true }),
@@ -199,7 +244,7 @@ export function NavigationRail({
     { id: "mail", icon: Mail, labelKey: "mail", href: "/", badge: inboxUnread },
     { id: "calendar", icon: Calendar, labelKey: "calendar", href: "/calendar", hidden: !supportsCalendar },
     { id: "contacts", icon: BookUser, labelKey: "contacts", href: "/contacts" },
-    { id: "files", icon: HardDrive, labelKey: "files", href: "/files", hidden: supportsWebDAV === false },
+    { id: "files", icon: HardDrive, labelKey: "files", href: "/files", hidden: supportsWebDAV === false || !filesEnabled },
   ];
 
   const isSettingsActive = !activeAppId && pathname.startsWith("/settings");
@@ -504,6 +549,22 @@ export function NavigationRail({
             <Keyboard className="w-[18px] h-[18px]" />
           </button>
         )}
+        {!onShowShortcuts && (
+          <>
+            <button
+              onClick={() => setShowShortcutsModal(true)}
+              data-tour="nav-shortcuts"
+              className="flex items-center justify-center w-10 h-10 rounded-md text-muted-foreground hover:text-foreground hover:bg-muted transition-colors"
+              title={t("keyboard_shortcuts")}
+            >
+              <Keyboard className="w-[18px] h-[18px]" />
+            </button>
+            <KeyboardShortcutsModal
+              isOpen={showShortcutsModal}
+              onClose={() => setShowShortcutsModal(false)}
+            />
+          </>
+        )}
 
         {quota && quota.total > 0 && (
           <div data-tour="storage-quota">
@@ -511,21 +572,85 @@ export function NavigationRail({
           </div>
         )}
 
-        {isPushConnected != null && (
-          <span
-            className="relative group"
-            title={isPushConnected ? t("push_connected") : t("push_disconnected")}
-          >
-            <span
+        {onLogout && showRailAccountList && accounts.length > 0 && (
+          <>
+            <div className="w-8 border-t my-1" style={{ borderColor: 'rgba(128, 128, 128, 0.3)' }} />
+
+            {/* Account circles */}
+            <div className="flex flex-col items-center gap-3">
+            {accounts.map((account) => {
+              const isActive = account.id === activeAccountId;
+              const initials = getInitials(account.displayName || account.label, account.email || account.username);
+              return (
+                <button
+                  key={account.id}
+                  onClick={() => {
+                    if (!isActive) switchAccount(account.id);
+                  }}
                   className={cn(
-                "inline-block w-1.5 h-1.5 rounded-full transition-all duration-300",
-                isPushConnected ? "bg-green-500" : "bg-muted-foreground/40"
+                    "relative flex items-center justify-center w-8 h-8 rounded-full text-white text-[11px] font-medium transition-all flex-shrink-0",
+                    isActive
+                      ? "ring-2 ring-primary ring-offset-2 ring-offset-background"
+                      : "opacity-70 hover:opacity-100"
                   )}
-            />
+                  style={{ backgroundColor: account.avatarColor }}
+                  title={`${account.displayName || account.label} (${account.email || account.username})`}
+                >
+                  {initials}
+                  {isActive && (
+                    <span className="absolute -bottom-0.5 -right-0.5 w-3 h-3 rounded-full bg-primary flex items-center justify-center">
+                      <Check className="w-2 h-2 text-primary-foreground" />
                     </span>
                   )}
+                </button>
+              );
+            })}
+            </div>
 
-        {onLogout && (
+            {/* Logout button with popover */}
+            <button
+              ref={logoutBtnRef}
+              onClick={() => setLogoutMenuOpen(!logoutMenuOpen)}
+              className="flex items-center justify-center w-9 h-9 rounded-md text-muted-foreground hover:text-foreground hover:bg-muted transition-colors"
+              title={t("sign_out")}
+              aria-expanded={logoutMenuOpen}
+              aria-haspopup="true"
+            >
+              <LogOut className="w-4 h-4" />
+            </button>
+
+            {logoutMenuOpen && createPortal(
+              <div
+                ref={logoutPopoverRef}
+                style={logoutPopoverStyle}
+                className="w-56 rounded-lg border border-border bg-background text-foreground shadow-lg z-50 overflow-hidden"
+                role="menu"
+              >
+                <button
+                  onClick={() => { setLogoutMenuOpen(false); logout(); }}
+                  className="w-full flex items-center gap-2 px-3 py-2.5 text-sm text-foreground hover:bg-muted transition-colors"
+                  role="menuitem"
+                >
+                  <LogOut className="w-4 h-4" />
+                  {t("sign_out")}
+                </button>
+                {accounts.length > 1 && (
+                  <button
+                    onClick={() => { setLogoutMenuOpen(false); logoutAll(); }}
+                    className="w-full flex items-center gap-2 px-3 py-2.5 text-sm text-destructive hover:bg-muted transition-colors"
+                    role="menuitem"
+                  >
+                    <LogOut className="w-4 h-4" />
+                    {t("sign_out_all")}
+                  </button>
+                )}
+              </div>,
+              document.body
+            )}
+          </>
+        )}
+
+        {onLogout && !showRailAccountList && (
           <AccountSwitcher variant="rail" />
         )}
       </div>

components/layout/sidebar-apps-modal.tsx

@@ -4,7 +4,7 @@ import { useState, useCallback } from 'react';
 import { useTranslations } from 'next-intl';
 import { X, Plus, Pencil, Trash2, ExternalLink, PanelRight } from 'lucide-react';
 import { icons as lucideIcons, type LucideIcon } from 'lucide-react';
-import { cn } from '@/lib/utils';
+import { cn, generateUUID } from '@/lib/utils';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { IconPicker } from './icon-picker';
@@ -155,7 +155,7 @@ function SidebarAppForm({
           {t('icon_label')} <span className="text-destructive">*</span>
           {SelectedIcon && (
             <span className="inline-flex items-center gap-1.5 ml-2 text-muted-foreground font-normal">
-              — <SelectedIcon className="w-4 h-4" /> {formData.icon}
+              - <SelectedIcon className="w-4 h-4" /> {formData.icon}
             </span>
           )}
         </label>
@@ -207,7 +207,7 @@ export function SidebarAppsModal({ isOpen, onClose }: SidebarAppsModalProps) {
   });
 
   const handleCreate = useCallback((data: SidebarAppFormData) => {
-    const id = `app-${Date.now()}-${Math.random().toString(36).slice(2, 7)}`;
+    const id = `app-${generateUUID()}`;
     addSidebarApp({ id, ...data });
     setIsCreating(false);
   }, [addSidebarApp]);