chore: update version to 1.5.4

Adds a once-per-day heartbeat that lets the project see how many
instances run Bulwark, on what platforms, with what features enabled,
and roughly how many accounts they have. No email addresses, hostnames,
IPs, or any end-user data are ever sent.

- lib/telemetry: state file, payload builder, jittered scheduler,
  instance_id persistence at <data-dir>/.telemetry-id (delete to reset)
- app/api/admin/telemetry: admin API for status / set-consent /
  set-endpoint / send-now (all audit-logged)
- app/admin/telemetry: settings page with status, JSON payload preview,
  endpoint editor, send-now button, link to the privacy page
- instrumentation.node.ts: starts the scheduler on boot

Default state is enabled. The first heartbeat fires 1 hour after boot
so an admin who installs and immediately disables produces zero pings.
Disable via the settings UI, BULWARK_TELEMETRY=off (or
BULWARK_TELEMETRY_DISABLED=1), or by clearing the endpoint.

Account counts are bucketed (1, 2-5, 6-10, 11-50, 51-200, 201+) so a
small instance can't be re-identified by exact size. The /.telemetry-id
file can be deleted to mint a fresh instance_id.

Receiving collector is open source at bulwarkmail/dashboard. Self-host
your own and point at it via BULWARK_TELEMETRY_URL. Full schema,
retention (90d raw → aggregates), and lawful basis are documented at
bulwarkmail.org/docs/legal/privacy/telemetry.

.env.example

@@ -71,11 +71,36 @@ 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:
-#   volumes:
-#     - bulwark-settings:/app/data/settings
+# /app/data/settings - mount a persistent volume there (see docker-compose.yml).
 # SETTINGS_DATA_DIR=./data/settings
 
+# =============================================================================
+# Admin Dashboard Data
+# =============================================================================
+
+# Directory for admin dashboard state: config overrides, admin password hash,
+# installed plugins/themes, and audit logs (default: ./data/admin).
+# For Docker, the default resolves to /app/data/admin - mount a persistent
+# volume there (see docker-compose.yml).
+# ADMIN_DATA_DIR=./data/admin
+
+# =============================================================================
+# Anonymous Telemetry
+# =============================================================================
+
+# Anonymous instance telemetry is enabled by default. Heartbeats contain no PII:
+# version, platform, bucketed account counts, and feature toggles only. See
+# https://bulwarkmail.org/docs/legal/privacy/telemetry for the full schema.
+#
+# Disable telemetry entirely (overrides the admin UI):
+# BULWARK_TELEMETRY=off
+
+# Directory for telemetry state: instance id, consent, login HMACs
+# (default: ./data/telemetry). For Docker, the default resolves to
+# /app/data/telemetry - mount a persistent volume there (see docker-compose.yml)
+# so the instance id and consent choice survive upgrades.
+# TELEMETRY_DATA_DIR=./data/telemetry
+
 # =============================================================================
 # Server Listen Address
 # =============================================================================
@@ -183,7 +208,8 @@ LOGIN_WEBSITE_URL=https://bulwarkmail.org
 # =============================================================================
 
 # URL of the BulwarkMail extension directory for the admin marketplace.
-# Set this to enable browsing and installing plugins/themes from the directory.
+# Defaults to https://extensions.bulwarkmail.org. Override only if you run
+# your own directory (e.g. http://localhost:3001 for local development).
 # EXTENSION_DIRECTORY_URL=https://extensions.bulwarkmail.org
 
 # =============================================================================

CHANGELOG.md

@@ -1,5 +1,132 @@
 # Changelog
 
+## 1.5.4 (2026-05-01)
+
+### Features
+
+- **PWA**: Web push notifications for new inbox mail (#233), with click-through to open the message
+- **Composer**: Insert and edit tables in rich-text emails (#236)
+- **Mail**: Configurable sub-addressing delimiter character (#239)
+- **i18n**: Turkish localization
+- **i18n**: Missing keys filled in across 15 locales
+
+### Fixes
+
+- **Mail**: Set In-Reply-To and References headers on replies (#234)
+- **Mail**: Persist htmlBody in drafts to preserve rich formatting (#236)
+- **Auth**: Pin JMAP auth verification to the configured server URL (#237)
+- **Auth**: Evict unrecoverable basic-auth accounts on reload
+- **Notifications**: Scope new-mail notifications to genuine inbox deliveries
+- **Notifications**: Extend PushVerification timeout and clean up leftover subscriptions
+- **Viewer**: Smooth out body load to prevent flicker on first render
+- **Viewer**: Prevent iframe flash when loading images or trusting the sender
+- **Viewer**: Pad bare HTML emails like plain-text mails for consistent layout
+- **Viewer**: Light-mode override now only affects body content
+- **Viewer**: Detect `<style>` tag when applying padding
+- **Viewer**: Drop iframe border-radius
+- **Calendar**: Localize event start date in detail popover and event modal
+- **Dev**: Include http protocol in connect-src for development mode CSP
+
+## 1.5.3 (2026-04-28)
+
+> **New:** Help shape Bulwark Webmail. Each instance now sends a lightweight daily heartbeat (version, platform, bucketed account counts, feature toggles - never message data or PII) so we can see which platforms and features actually get used and prioritize fixes where they matter most. You're in control: opt out any time from **Admin → Telemetry** or by setting `BULWARK_TELEMETRY=off`. Full schema in the [privacy notice](https://bulwarkmail.org/docs/legal/privacy/telemetry).
+
+### Features
+
+- **Telemetry**: Anonymous instance telemetry, on by default. Reports schema version, platform, bucketed account counts, and feature toggles only - disable from the admin UI, with `BULWARK_TELEMETRY=off`, or by clearing the endpoint
+- **Telemetry**: Track unique logins (HMAC'd per instance, 90-day retention) so the heartbeat can report bucketed account totals without storing usernames
+- **Plugins**: Theme API v2 with token compiler and skin slot
+- **Plugins**: Extension preview page and detailed extension info API
+- **Calendar**: Right-click context menu on empty calendar space
+- **Docker**: Persistent named volume for telemetry data so the instance id and admin's consent choice survive container upgrades
+
+### Fixes
+
+- **Security**: Block telemetry endpoint from pointing at internal/loopback hosts (validation + DNS-rebind re-check at fetch time)
+- **Security**: Harden plugin config, TOTP token exchange, and branding file serving
+- **Mail**: Batch shortcuts now act on the multi-selection when one is present (#228)
+
+## 1.5.2 (2026-04-27)
+
+### Features
+
+- **Plugins**: New `composer-sidebar` slot and `ui:composer-sidebar` permission - plugins can now render a panel on either side of the New Message dialog. See `repos/subway-surfers` for an example
+- **Plugins**: Manifests can declare `frameOrigins` - a strictly-validated list of `https://host` origins the plugin needs to embed. The proxy reads the union from enabled plugins and merges it into the host CSP `frame-src`, so the host CSP no longer needs to know about specific embed providers
+- **Calendar/Contacts**: JMAP sharing for calendars and address books
+- **i18n**: Czech language support
+
+### Fixes
+
+- **Security**: Validate URLs before outbound fetch
+- **Calendar**: Prevent drag creation on touch events in the time grid
+- **Contacts**: Emit RFC 9553 name kinds and decode QUOTED-PRINTABLE in vCard import (#224, #187)
+- **Mail**: Hide preview line in compact density to match settings preview (#223)
+- **Proxy**: Inline matcher for Next.js proxy and drop unnecessary Node.js runtime config
+- **i18n**: Portuguese fixes for "ficheiro" and "contactos" variants
+
+## 1.5.1 (2026-04-25)
+
+### Features
+
+- **Stalwart**: OAuth auto-setup with dialog and validation for origin and issuer URLs
+- **Mail**: Right-click context menu on the folders sidebar
+- **Mail**: Replace folder `prompt()` calls with a proper modal dialog
+- **Calendar**: Add 'Today' button to the desktop calendar toolbar
+- **Junk**: Setting to show avatars in the Junk folder (off by default)
+
+### Fixes
+
+- **Admin**: Restore admin panel after Stalwart v0.16 REST API removal
+- **Viewer**: Restore broken viewer toolbar actions and improve the mobile menu (#220)
+- **Folders**: Stop flicker on background folder refresh
+- **Email**: Preserve search/filter on batch move and archive
+- **Email**: Preserve search/filter when moving emails via drag-drop
+- **i18n**: Improve Korean flag
+
+## 1.5.0 (2026-04-22)
+
+### Breaking Changes
+
+- **Self-service portal now needs Stalwart 0.16+**: Stalwart dropped its self-service HTTP API in 0.16.0 and replaced it with JMAP. Bulwark Webmail only talks to the new JMAP endpoint, so the self-service portal (account settings, app passwords, API keys) requires Stalwart 0.16 or newer. `STALWART_API_URL` is deprecated, these actions go through the normal JMAP session.
+
+### Features
+
+- **Stalwart**: Migrate Stalwart management API to JMAP `x:` methods for Stalwart 0.16
+- **Admin**: Add API Keys management and IP allowlist for App Passwords
+- **Contacts**: Revamp contact detail view with filters, photo, print, and duplicate actions
+- **Contacts**: Add contact activity component showing recent emails and upcoming events
+- **Contacts**: Add right-click context menu
+- **Contacts**: Group contacts by first letter with sticky section headers, toggleable in settings
+- **Calendar**: Support resizing events from the top edge
+- **Calendar**: Add timezone-aware formatting for event start times and update `utcEnd` on duration change
+- **Calendar**: Optimize layout of overlapping events
+- **Calendar**: Add collapsible details to calendar invitation banner
+- **Email**: Implement batch archiving and bulk moving of emails
+- **Email**: Show full folder path in move/drop toast
+- **Settings**: Reorganize settings into 6 groups with clearer tabs
+- **Navigation**: Add account-addition button to the navigation rail
+- **Mobile**: Streamline email viewer header layout
+- **Mobile**: Pass `isMobile` through calendar views and time-grid interactions
+
+### Fixes
+
+- **Mailbox**: Retry mailbox fetch on first login to handle lazy provisioning (#217)
+- **Mailbox**: Use fresh state in archive handling to avoid stale mailbox data
+- **Mailbox**: Improve error message on mailbox creation failure
+- **Auth**: Skip `checkAuth` on route change when already authenticated
+- **Auth**: Clean up unused imports and improve TOTP QR code rendering
+- **UI**: Align hover styles and selection-toggle target with focused item
+- **UI**: Read `matchMedia` synchronously on client to prevent layout flicker
+
+### Refactor
+
+- **Settings**: Remove Stalwart API URL configuration (now derived via JMAP)
+
+### Chore
+
+- **i18n**: Add missing translation keys
+- **Deps**: Bump dependencies to latest compatible versions
+
 ## 1.4.14 (2026-04-16)
 
 Thank you for your donations:

Dockerfile

@@ -26,7 +26,7 @@ RUN apk upgrade --no-cache && \
 COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
-RUN mkdir -p /app/data/settings /app/data/admin && chown -R nextjs:nodejs /app/data
+RUN mkdir -p /app/data/settings /app/data/admin /app/data/telemetry && chown -R nextjs:nodejs /app/data
 USER nextjs
 EXPOSE 3000
 ENV PORT=3000

FEATURES.md

@@ -0,0 +1,124 @@
+# Features
+
+## Mail
+
+- Read, compose, reply, reply-all, and forward with a Tiptap rich text editor (inline images, drag-and-drop embedding)
+- Gmail-style threading with inline expansion and an optional conversation toggle
+- Unified mailbox view across all connected accounts
+- Draft auto-save with identity preservation
+- Attachment upload, download, and inline preview; forgotten-attachment warning
+- Full-text search with JMAP filter panel, search chips, wildcards, OR conditions, and cross-mailbox queries
+- Batch operations – multi-select, archive, delete, move, tag
+- Archive modes – direct, by year, or by month
+- Multi-tag support with color labels, reordering, and drag-and-drop assignment
+- Star/unstar with configurable mark-as-read delay
+- Virtual scrolling for large mailboxes
+- Quick reply, hover actions, sender avatars (favicon-based), and recipient popovers
+- Plain-text composer mode and Reply-To support
+- TNEF (`winmail.dat`) extraction and `message/rfc822` unwrapping
+- Folder management with icon picker, subfolders, and sidebar counts
+- Print directly from the viewer
+- Browser history sync for back/forward navigation
+
+## Calendar
+
+- Month, week, day, and agenda views with a mini-calendar sidebar and task list
+- Drag-to-reschedule, click-drag creation, and edge-resize with 15-minute snap
+- Recurring events with scoped edit/delete (this / this and following / all)
+- iMIP invitations on create and update (RFC 5545 / 6047), organizer/attendee UI, and RSVP with trust assessment
+- Inline calendar invitations in the email viewer – auto-detect `.ics`, RSVP, import
+- iCalendar import with preview, bulk create, and UID deduplication
+- iCal / webcal subscriptions with editing and batch import
+- Auto-generated birthday calendar from contacts
+- Virtual locations (video conference URLs) as first-class event fields
+- Task management with due dates, priority, and completion status
+- Shared calendars with CalDAV discovery and multi-account home resolution
+- Week numbers, event hover preview, notifications with sound picker
+- Real-time sync via JMAP push
+
+## Contacts
+
+- JMAP sync (RFC 9553 / 9610) with local fallback
+- Multiple address books with drag-and-drop between books
+- Contact groups with member management
+- vCard import/export (RFC 6350) with duplicate detection
+- Trusted senders stored in a dedicated JMAP address book
+- Autocomplete in the composer (To / Cc / Bcc)
+
+## Filters & Templates
+
+- Server-side filters via JMAP Sieve Scripts (RFC 9661)
+- Visual rule builder with expanded view; conditions (From, To, Subject, Size, Body…) and actions (Move, Forward, Star, Discard…)
+- Preserves rules authored in other clients
+- Raw Sieve editor with syntax validation
+- Vacation responder with date range scheduling
+- Reusable email templates with placeholder auto-fill (`{{recipientName}}`, `{{date}}`, …)
+
+## Files
+
+- JMAP FileNode browser (Stalwart native cloud storage)
+- Streamed WebDAV PUT upload and folder upload with progress tracking
+- Dynamic upload limits based on server configuration
+- Grid and list views with sorting by name, size, or date
+- Previews for images, text, audio, and video
+- Clipboard operations (cut, copy, paste, duplicate), favorites, and recent files
+
+## Security & Privacy
+
+- External content blocked by default, with a trusted senders list
+- HTML sanitization via DOMPurify
+- S/MIME – manage certificates, sign, encrypt, decrypt, and verify; legacy 3DES / PBE support; per-account key isolation
+- SPF / DKIM / DMARC status indicators
+- OAuth2 / OIDC with PKCE (Keycloak, Authentik, or built-in), OAuth-only mode, OAuth app passwords, and non-interactive SSO for embedded deployments
+- TOTP two-factor authentication
+- Account security panel for password and 2FA management via the Stalwart admin API
+- Optional "Remember me" via AES-256-GCM encrypted httpOnly cookie
+- Enforced CSP with per-request nonce, SSRF redirect validation, PDF iframe sandbox, and IP spoofing prevention
+- Plugin hardening with dangerous-pattern detection and admin approval
+- Newsletter unsubscribe (RFC 2369)
+
+## Interface
+
+- Three-pane layout with resizable columns
+- Dark and light themes with intelligent email color transformation
+- Responsive desktop, tablet, and mobile layouts
+- Full keyboard navigation
+- Drag-and-drop email organization and tag assignment
+- Interactive guided tour for new users
+- Right-click context menus, toast notifications with undo
+- Customizable toolbar position, favicon, and login branding
+- Pinnable sidebar apps with drag-and-drop reordering
+- Encrypted settings sync across devices
+- Storage quota display
+- WCAG AA contrast, reduced-motion support, focus trap, and screen reader live regions
+
+## Internationalization
+
+15 languages: English · Français · 日本語 · Español · Italiano · Deutsch · Nederlands · Português · Русский · Türkçe · 한국어 · Polski · Latviešu · 简体中文 · Українська
+
+Automatic browser detection with persistent preference. Configurable locale URL prefix via `NEXT_PUBLIC_LOCALE_PREFIX`.
+
+## Identity & Multi-Account
+
+- Up to 5 simultaneous accounts with instant switching and per-account session persistence
+- Account switcher with connection status and default account selection
+- Multiple sender identities with per-identity signatures, automatic sync, and badges in viewer/list
+- Sub-addressing (`user+tag@domain.com`) with contextual tag suggestions
+- Shared folders across accounts
+- Optional custom JMAP endpoints on the login form (`ALLOW_CUSTOM_JMAP_ENDPOINT`)
+
+## Admin & Extensibility
+
+- Stalwart admin dashboard with dedicated policy sections
+- Plugin system – schema-driven config UI, render and intercept hooks, `onAvatarResolve` and i18n APIs, calendar event slots, and managed policy enforcement
+- Themes – upload, enforce, and manage admin-controlled themes as ZIP bundles
+- Extension marketplace – browse and install plugins and themes from a configurable directory (`EXTENSION_DIRECTORY_URL`)
+- Bundled plugins including Jitsi Meet calendar integration
+
+## Operations
+
+- Progressive Web App with service worker, install prompt, and dynamic manifest
+- Automatic update check with server-side logging of new releases
+- Structured logging (`text` or `json`) with category-based levels
+- Release (`main`) and development (`dev`) Docker images on GHCR
+- Demo mode with fixture data – no mail server required

README.md

@@ -8,12 +8,11 @@
 
 # Bulwark Webmail
 
-A modern, self-hosted webmail client for [Stalwart Mail Server](https://stalw.art/).<br/>
-Built with Next.js and the JMAP protocol.
+A modern, self-hosted webmail client for [Stalwart Mail Server](https://stalw.art/), built with Next.js and the JMAP protocol.
 
 [![License: AGPL v3](https://img.shields.io/badge/license-AGPL%20v3-blue.svg?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-1.4.14-green.svg?logo=git&logoColor=white)](CHANGELOG.md)
+[![Version](https://img.shields.io/badge/version-1.5.4-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>
@@ -22,228 +21,58 @@ Built with Next.js and the JMAP protocol.
 
 ## Screenshots
 
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="screenshots/mail-dark.png" />
+  <img src="screenshots/mail-white.png" alt="Mail view" width="100%" />
+</picture>
+
 <table>
 <tr>
-<td width="50%">
-
-<img src="screenshots/inbox.png" width="100%" alt="Inbox - three-pane layout with sidebar, email list, and viewer (dark mode)">
-
-**Mail** - Three-pane layout with sidebar, email list, and viewer
-
-</td>
-<td width="50%">
-
-<img src="screenshots/calendar.png" width="100%" alt="Calendar">
-
-**Calendar** - Month, week, day, and agenda views with event management
-
-</td>
+<td width="50%"><img src="screenshots/calendar.png" alt="Calendar" /></td>
+<td width="50%"><img src="screenshots/contacts.png" alt="Contacts" /></td>
 </tr>
 <tr>
-<td width="50%">
-
-<img src="screenshots/contacts.png" width="100%" alt="Contacts">
-
-**Contacts** - Contact management with groups and vCard support
-
-</td>
-<td width="50%">
-
-<img src="screenshots/files.png" width="100%" alt="File browser">
-
-**Files** - Cloud file browser with upload, preview, and folder navigation
-
-</td>
+<td><sub><b>Calendar</b> – month, week, day, and agenda views with drag-to-reschedule, iMIP invitations, and CalDAV subscriptions.</sub></td>
+<td><sub><b>Contacts</b> – multiple address books, groups, vCard import/export, and autocomplete in the composer.</sub></td>
+</tr>
+<tr>
+<td><img src="screenshots/theme.png" alt="Themes" /></td>
+<td><img src="screenshots/plugins.png" alt="Plugins" /></td>
+</tr>
+<tr>
+<td><sub><b>Themes</b> – bundled color themes or upload your own as ZIP bundles; admins can enforce presets.</sub></td>
+<td><sub><b>Plugins</b> – extend the client with bundled or third-party plugins installed from a .zip file.</sub></td>
+</tr>
+<tr>
+<td><img src="screenshots/mail-white.png" alt="Light mode" /></td>
+<td><img src="screenshots/settings.png" alt="Settings" /></td>
+</tr>
+<tr>
+<td><sub><b>Light mode</b> – full theme support with intelligent color transformation for HTML emails.</sub></td>
+<td><sub><b>Settings</b> – appearance, identities, filters, templates, security, and more.</sub></td>
 </tr>
 </table>
 
-<details>
-<summary>More screenshots</summary>
-<table>
-<tr>
-<td width="50%">
+> **Anonymous telemetry is on by default** since 1.5.3. Each instance sends a daily heartbeat (version, platform, bucketed account counts, feature toggles - no message data, no PII). Disable from **Admin → Telemetry**, by setting `BULWARK_TELEMETRY=off`, or by clearing the endpoint. Full schema: [privacy notice](https://bulwarkmail.org/docs/legal/privacy/telemetry).
 
-<img src="screenshots/inbox%20whitemode.png" width="100%" alt="Inbox - light mode">
+## Overview
 
-**Light mode** - Full theme support with intelligent color transformation
+Bulwark is a full webmail suite – not just an inbox. It bundles the four apps most self-hosters end up wanting on the same login:
 
-</td>
-<td width="50%">
+- **Mail** – threading, unified inbox, full-text search, Sieve filters, S/MIME, templates
+- **Calendar** – month/week/day/agenda, recurring events, iMIP invitations, CalDAV subscriptions
+- **Contacts** – multiple address books, groups, vCard import/export
+- **Files** – Stalwart's JMAP FileNode storage with previews and folder upload
 
-<img src="screenshots/settings.png" width="100%" alt="Settings">
+Plus the infrastructure around them: OAuth2 / OIDC SSO, TOTP 2FA, multi-account (up to 5 at once), 15 languages, PWA install, dark/light themes, a plugin system with an extension marketplace, and a admin dashboard.
 
-**Settings** - Appearance, identities, filters, templates, and more
-
-</td>
-</tr>
-<tr>
-<td width="50%">
-
-<img src="screenshots/login.png" width="100%" alt="Login page">
-
-**Login** - Configurable branding with OAuth2/OIDC and 2FA support
-
-</td>
-<td width="50%">
-</td>
-</tr>
-</table>
-</details>
-
-## Features
-
-### Mail
-
-- **Read, compose, reply, reply-all, forward** with rich HTML rendering 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
-- **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
-- **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
-- **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 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
-
-### 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
-
-### 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…) 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.)
-
-### Files
-
-- **File browser** with JMAP FileNode cloud storage (Stalwart native)
-- **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
-- **File preview** for images, text, audio, video, and more
-- **Favorites and recent files** for quick access
-- **Bulk operations** - multi-select, delete, move, download
-
-### Security & Privacy
-
-- **External content blocked** by default - trusted senders list for auto-load
-- **HTML sanitization** via DOMPurify with XSS prevention
-- **S/MIME** - manage certificates, sign outgoing mail, encrypt to recipients, decrypt messages, and verify signatures; 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, 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** - 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
-- **Dark and light themes** with intelligent email color transformation
-- **Always-light email rendering** option for problematic HTML messages in dark theme
-- **Responsive** - desktop sidebar + mobile bottom tab bar with tablet support
-- **Keyboard shortcuts** - full navigation without a mouse
-- **Drag-and-drop** email organization between mailboxes and tag assignment
-- **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 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
-- **Version badge** in settings
-- **Focused mode** with proper viewport bounds
-- **Accessibility** - WCAG AA contrast, reduced-motion support, focus trap, screen reader live regions
-
-### Internationalization
-
-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. Configurable locale URL prefix via `NEXT_PUBLIC_LOCALE_PREFIX`.
-
-### Identity Management
-
-- **Multiple sender identities** with per-identity signatures
-- **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
-
-- **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
+Full feature list: **[FEATURES.md](FEATURES.md)**.
 
 ---
 
 ## Quick Start
 
-### Docker (recommended)
+### Docker
 
 ```bash
 docker run -d -p 3000:3000 \
@@ -255,7 +84,7 @@ 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
 ```
 
@@ -266,21 +95,21 @@ 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
 ```
 
 ### Development
 
 ```bash
-npm run dev        # Start dev server (mock JMAP server included)
-npm run typecheck  # Type checking
-npm run lint       # Linting
+npm run dev        # Dev server with a mock JMAP server
+npm run typecheck
+npm run lint
 ```
 
 ## Configuration
 
-Edit `.env.local`:
+All variables are evaluated at runtime, so Docker deployments can be reconfigured without rebuilding. Edit `.env.local`:
 
 ```env
 # Required
@@ -290,27 +119,25 @@ JMAP_SERVER_URL=https://mail.example.com
 APP_NAME=My Webmail
 ```
 
-All variables are **runtime** - Docker deployments can be configured without rebuilding.
-
 <details>
-<summary>Server Listen Address</summary>
+<summary>Server listen address</summary>
 
 ```env
 HOSTNAME=0.0.0.0    # Default; use "::" for IPv6
-PORT=3000            # Default listen port
+PORT=3000
 ```
 
 </details>
 
 <details>
-<summary>OAuth2/OIDC (SSO)</summary>
+<summary>OAuth2 / OIDC</summary>
 
 ```env
 OAUTH_ENABLED=true
 OAUTH_CLIENT_ID=webmail
 OAUTH_CLIENT_SECRET=              # optional, for confidential clients
-OAUTH_CLIENT_SECRET_FILE=         # Path to a file containing the client secret
-OAUTH_ISSUER_URL=                 # optional, for external IdPs (Keycloak, Authentik)
+OAUTH_CLIENT_SECRET_FILE=         # path to a file containing the secret
+OAUTH_ISSUER_URL=                 # optional, for external IdPs
 ```
 
 Endpoints are auto-discovered via `.well-known/oauth-authorization-server` or `.well-known/openid-configuration`.
@@ -318,29 +145,28 @@ Endpoints are auto-discovered via `.well-known/oauth-authorization-server` or `.
 </details>
 
 <details>
-<summary>Remember Me & Settings Sync</summary>
+<summary>Session & 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
+SESSION_SECRET=                      # openssl rand -base64 32
+SESSION_SECRET_FILE=/session-secret  # path to a file containing the secret
 
-SETTINGS_SYNC_ENABLED=true           # Persist encrypted user settings on the server
-SETTINGS_DATA_DIR=./data/settings    # Storage location (mount a volume in Docker)
+SETTINGS_SYNC_ENABLED=true
+SETTINGS_DATA_DIR=./data/settings    # mount as a volume in Docker
 ```
 
-Credentials encrypted with AES-256-GCM, stored in an httpOnly cookie (30-day expiry).
-Settings sync stores per-account preferences encrypted at rest and requires `SESSION_SECRET`.
+Credentials are encrypted with AES-256-GCM and stored in an httpOnly cookie (30-day expiry). Settings sync stores per-account preferences encrypted at rest and requires `SESSION_SECRET`.
 
 </details>
 
 <details>
-<summary>Custom JMAP Endpoint</summary>
+<summary>Custom JMAP endpoint</summary>
 
 ```env
-ALLOW_CUSTOM_JMAP_ENDPOINT=true      # Shows a "JMAP Server" field on login
+ALLOW_CUSTOM_JMAP_ENDPOINT=true
 ```
 
-Lets users connect to any JMAP-compatible server. External servers must CORS-allow the webmail origin.
+Shows a "JMAP Server" field on the login form. External servers must CORS-allow the webmail origin.
 
 </details>
 
@@ -349,13 +175,13 @@ Lets users connect to any JMAP-compatible server. External servers must CORS-all
 
 ```env
 APP_NAME=My Webmail
-APP_SHORT_NAME=Webmail               # Home-screen label on mobile
-APP_DESCRIPTION=Your personal mail   # Shown during PWA install
+APP_SHORT_NAME=Webmail
+APP_DESCRIPTION=Your personal mail
 
 FAVICON_URL=/branding/favicon.svg
-PWA_ICON_URL=/branding/icon.svg      # Falls back to FAVICON_URL
-PWA_THEME_COLOR=#3b82f6              # Browser chrome color
-PWA_BACKGROUND_COLOR=#ffffff         # PWA splash background
+PWA_ICON_URL=/branding/icon.svg      # falls back to FAVICON_URL
+PWA_THEME_COLOR=#3b82f6
+PWA_BACKGROUND_COLOR=#ffffff
 
 APP_LOGO_LIGHT_URL=/branding/logo-light.svg
 APP_LOGO_DARK_URL=/branding/logo-dark.svg
@@ -371,7 +197,7 @@ LOGIN_PRIVACY_POLICY_URL=https://example.com/privacy
 </details>
 
 <details>
-<summary>Extension Directory</summary>
+<summary>Extension directory</summary>
 
 ```env
 EXTENSION_DIRECTORY_URL=https://extensions.bulwarkmail.org
@@ -382,13 +208,13 @@ Enables the admin marketplace for browsing and installing plugins and themes.
 </details>
 
 <details>
-<summary>Stalwart Integration & Logging</summary>
+<summary>Stalwart integration & logging</summary>
 
 ```env
-STALWART_FEATURES=true               # Password change, sieve filters, etc.
+STALWART_FEATURES=true               # password change, Sieve filters, etc.
 
 LOG_FORMAT=text                      # "text" or "json"
-LOG_LEVEL=info                       # "error", "warn", "info", "debug"
+LOG_LEVEL=info                       # error | warn | info | debug
 ```
 
 </details>
@@ -423,19 +249,16 @@ LOG_LEVEL=info                       # "error", "warn", "info", "debug"
 
 ## Why Stalwart?
 
-[Stalwart](https://github.com/stalwartlabs/mail-server) is a mail server written in Rust with **native JMAP support** - not IMAP/SMTP with JMAP bolted on. It handles JMAP, IMAP, SMTP, and ManageSieve in a single binary. Self-hosted, no third-party dependencies.
+[Stalwart](https://github.com/stalwartlabs/mail-server) is a Rust mail server with native JMAP support – not IMAP/SMTP with JMAP bolted on. It handles JMAP, IMAP, SMTP, and ManageSieve in a single self-hosted binary with no third-party dependencies.
 
 ## Contributing
 
-See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.
+See [CONTRIBUTING.md](CONTRIBUTING.md).
 
 ## License
 
-[GNU AGPL v3](LICENSE)
-
-This repository also preserves the original MIT attribution notice for the
-fork lineage in [NOTICE](NOTICE).
+[GNU AGPL v3](LICENSE). This repository preserves the original MIT attribution for the fork lineage in [NOTICE](NOTICE).
 
 ## Acknowledgments
 
-Thanks to [root-fr/jmap-webmail](https://github.com/root-fr/jmap-webmail/) and [@ma2t](https://github.com/ma2t) for doing most of the groundwork that this project builds upon.
+Thanks to [root-fr/jmap-webmail](https://github.com/root-fr/jmap-webmail/) and [@ma2t](https://github.com/ma2t) for the groundwork this project builds upon.

VERSION

@@ -1 +1 @@
-1.4.14
+1.5.4

app/[locale]/calendar/page.tsx

@@ -31,6 +31,7 @@ import { CalendarSidebarPanel } from "@/components/calendar/calendar-sidebar-pan
 import { EventModal, type PendingEventPreview } from "@/components/calendar/event-modal";
 import { EventDetailPopover } from "@/components/calendar/event-detail-popover";
 import { EventContextMenu } from "@/components/calendar/event-context-menu";
+import { EmptySpaceContextMenu } from "@/components/calendar/empty-space-context-menu";
 import { useContextMenu } from "@/hooks/use-context-menu";
 import { useRefreshGesture } from "@/hooks/use-refresh-gesture";
 import { downloadEventICS } from "@/lib/calendar-ics-export";
@@ -47,7 +48,11 @@ 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 type { Calendar, CalendarEvent, CalendarParticipant, CalendarRights } from "@/lib/jmap/types";
+import { ShareCollectionDialog } from "@/components/settings/share-collection-dialog";
+import { ConfirmDialog } from "@/components/ui/confirm-dialog";
+import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
+import { CreateCalendarModal } from "@/components/calendar/create-calendar-modal";
 import { getUserParticipantId } from "@/lib/calendar-participants";
 import { generateBirthdayEvents, createBirthdayCalendar, BIRTHDAY_CALENDAR_ID } from "@/lib/birthday-calendar";
 import { debug } from "@/lib/debug";
@@ -72,7 +77,8 @@ export default function CalendarPage() {
     calendars, events, selectedDate, viewMode, selectedCalendarIds,
     isLoading, isLoadingEvents, supportsCalendar, error,
     fetchCalendars, fetchEvents, createEvent, updateEvent, deleteEvent, rsvpEvent,
-    setSelectedDate, setViewMode, toggleCalendarVisibility, updateCalendar,
+    setSelectedDate, setViewMode, toggleCalendarVisibility, updateCalendar, shareCalendar,
+    removeCalendar, clearCalendarEvents,
     refreshAllSubscriptions, icalSubscriptions,
   } = useCalendarStore();
   const { firstDayOfWeek, timeFormat, showWeekNumbers, enableCalendarTasks, showTasksOnCalendar, calendarHoverPreview, showBirthdayCalendar, birthdayCalendarColor, updateSetting } = useSettingsStore();
@@ -91,9 +97,15 @@ export default function CalendarPage() {
   const [showImportModal, setShowImportModal] = useState(false);
   const [showSubscriptionModal, setShowSubscriptionModal] = useState(false);
   const [editingSubscription, setEditingSubscription] = useState<string | null>(null);
+  const [sharingCalendarId, setSharingCalendarId] = useState<string | null>(null);
+  const [defaultCalendarIdForCreate, setDefaultCalendarIdForCreate] = useState<string | undefined>(undefined);
+  const [showCreateCalendar, setShowCreateCalendar] = useState(false);
+  const { dialogProps: confirmDialogProps, confirm: confirmAction } = useConfirmDialog();
+  const tMgmt = useTranslations("calendar.management");
   const [editEvent, setEditEvent] = useState<CalendarEvent | null>(null);
   const [defaultModalDate, setDefaultModalDate] = useState<Date | undefined>();
   const [defaultModalEndDate, setDefaultModalEndDate] = useState<Date | undefined>();
+  const [defaultModalAllDay, setDefaultModalAllDay] = useState(false);
   const [miniMonth, setMiniMonth] = useState(new Date());
   const [pendingScopeAction, setPendingScopeAction] = useState<PendingScopeAction | null>(null);
   const [detailEvent, setDetailEvent] = useState<CalendarEvent | null>(null);
@@ -126,8 +138,15 @@ export default function CalendarPage() {
     }
   }, [events, detailEvent]);
 
-  // Check auth on mount
+  // Check auth on mount – skip when already authenticated so that navigating
+  // between routes doesn't retrigger checkAuth's transient `{ client: null,
+  // isLoading: true }` reset, which was flashing the spinner on every nav.
   useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
     checkAuth().finally(() => {
       setInitialCheckDone(true);
     });
@@ -309,11 +328,12 @@ export default function CalendarPage() {
     setSelectedDate(date);
   }, [setSelectedDate]);
 
-  const openCreateModal = useCallback((date?: Date, endDate?: Date) => {
+  const openCreateModal = useCallback((date?: Date, endDate?: Date, allDay?: boolean) => {
     setEditEvent(null);
     const d = date || selectedDate;
     setDefaultModalDate(d);
     setDefaultModalEndDate(endDate);
+    setDefaultModalAllDay(allDay ?? false);
     setSelectedDate(d);
     setShowEventModal(true);
   }, [selectedDate, setSelectedDate]);
@@ -378,6 +398,21 @@ export default function CalendarPage() {
     openEventContextMenu(e, event);
   }, [closeDetail, openEventContextMenu]);
 
+  const {
+    contextMenu: emptyContextMenu,
+    openContextMenu: openEmptyContextMenu,
+    closeContextMenu: closeEmptyContextMenu,
+    menuRef: emptyContextMenuRef,
+  } = useContextMenu<{ date: Date; hour?: number; allDayArea?: boolean }>();
+
+  const handleContextMenuEmpty = useCallback(
+    (e: React.MouseEvent, date: Date, hour?: number, allDayArea?: boolean) => {
+      closeDetail();
+      openEmptyContextMenu(e, { date, hour, allDayArea });
+    },
+    [closeDetail, openEmptyContextMenu],
+  );
+
   const handleHoverEvent = useCallback((event: CalendarEvent, anchorRect: DOMRect) => {
     if (isMobile) return;
     if (calendarHoverPreview === 'off') return;
@@ -944,6 +979,7 @@ export default function CalendarPage() {
               onHoverEvent={handleHoverEvent}
               onHoverLeave={handleHoverLeave}
               onContextMenuEvent={handleContextMenuEvent}
+              onContextMenuEmpty={handleContextMenuEmpty}
               onCreateAtTime={openCreateModal}
               firstDayOfWeek={firstDayOfWeek}
               isMobile={isMobile}
@@ -961,6 +997,7 @@ export default function CalendarPage() {
               onHoverEvent={handleHoverEvent}
               onHoverLeave={handleHoverLeave}
               onContextMenuEvent={handleContextMenuEvent}
+              onContextMenuEmpty={handleContextMenuEmpty}
               onCreateAtTime={openCreateModal}
               firstDayOfWeek={firstDayOfWeek}
               timeFormat={timeFormat}
@@ -980,6 +1017,7 @@ export default function CalendarPage() {
               onHoverEvent={handleHoverEvent}
               onHoverLeave={handleHoverLeave}
               onContextMenuEvent={handleContextMenuEvent}
+              onContextMenuEmpty={handleContextMenuEmpty}
               onCreateAtTime={openCreateModal}
               timeFormat={timeFormat}
               isMobile={isMobile}
@@ -1095,6 +1133,42 @@ export default function CalendarPage() {
                 }
                 updateCalendar(client, calendarId, { color });
               } : undefined}
+              onShareCalendar={client ? (cal) => setSharingCalendarId(cal.id) : undefined}
+              onCreateEvent={(cal: Calendar) => {
+                setDefaultCalendarIdForCreate(cal.id);
+                openCreateModal();
+              }}
+              onClearCalendar={client ? async (cal: Calendar) => {
+                const ok = await confirmAction({
+                  title: tMgmt("clear_events"),
+                  message: tMgmt("confirm_clear", { name: cal.name }),
+                  variant: "destructive",
+                  confirmText: tMgmt("clear_events"),
+                });
+                if (!ok) return;
+                try {
+                  const count = await clearCalendarEvents(client, cal.id);
+                  toast.success(tMgmt("events_cleared", { count }));
+                } catch {
+                  toast.error(tMgmt("error_clear"));
+                }
+              } : undefined}
+              onDeleteCalendar={client ? async (cal: Calendar) => {
+                const ok = await confirmAction({
+                  title: tMgmt("delete"),
+                  message: tMgmt("confirm_delete", { name: cal.name }),
+                  variant: "destructive",
+                  confirmText: tMgmt("delete"),
+                });
+                if (!ok) return;
+                try {
+                  await removeCalendar(client, cal.id);
+                  toast.success(tMgmt("calendar_deleted"));
+                } catch {
+                  toast.error(tMgmt("error_delete"));
+                }
+              } : undefined}
+              onCreateCalendar={client ? () => setShowCreateCalendar(true) : undefined}
               onSubscribe={() => setShowSubscriptionModal(true)}
               onEditSubscription={(subId) => setEditingSubscription(subId)}
               client={client}
@@ -1158,11 +1232,13 @@ export default function CalendarPage() {
                 calendars={calendars}
                 defaultDate={defaultModalDate}
                 defaultEndDate={defaultModalEndDate}
+                defaultAllDay={defaultModalAllDay}
+                defaultCalendarId={defaultCalendarIdForCreate}
                 onSave={handleSaveEvent}
                 onDelete={handleDeleteEvent}
                 onDuplicate={handleDuplicateEvent}
                 onRsvp={handleRsvp}
-                onClose={() => { setShowEventModal(false); setEditEvent(null); setPendingPreview(null); }}
+                onClose={() => { setShowEventModal(false); setEditEvent(null); setPendingPreview(null); setDefaultCalendarIdForCreate(undefined); setDefaultModalAllDay(false); }}
                 onPreviewChange={setPendingPreview}
                 currentUserEmails={currentUserEmails}
                 isMobile={false}
@@ -1228,6 +1304,38 @@ export default function CalendarPage() {
         />
       )}
 
+      {emptyContextMenu.data && (() => {
+        const { date, hour } = emptyContextMenu.data;
+        return (
+          <EmptySpaceContextMenu
+            position={emptyContextMenu.position}
+            isOpen={emptyContextMenu.isOpen}
+            onClose={closeEmptyContextMenu}
+            menuRef={emptyContextMenuRef}
+            onNewEvent={() => {
+              const d = new Date(date);
+              if (typeof hour === "number") {
+                d.setHours(hour, 0, 0, 0);
+              } else {
+                const now = new Date();
+                d.setHours(now.getHours() + 1, 0, 0, 0);
+              }
+              openCreateModal(d);
+            }}
+            onNewAllDayEvent={() => {
+              const d = new Date(date);
+              d.setHours(0, 0, 0, 0);
+              openCreateModal(d, undefined, true);
+            }}
+            onNewTask={enableCalendarTasks ? () => {
+              setEditTask(null);
+              setShowTaskModal(true);
+            } : undefined}
+            onGoToToday={goToToday}
+          />
+        );
+      })()}
+
       {detailEvent && detailAnchorRect && (
         <EventDetailPopover
           event={detailEvent}
@@ -1254,11 +1362,13 @@ export default function CalendarPage() {
           calendars={calendars}
           defaultDate={defaultModalDate}
           defaultEndDate={defaultModalEndDate}
+          defaultAllDay={defaultModalAllDay}
+          defaultCalendarId={defaultCalendarIdForCreate}
           onSave={handleSaveEvent}
           onDelete={handleDeleteEvent}
           onDuplicate={handleDuplicateEvent}
           onRsvp={handleRsvp}
-          onClose={() => { setShowEventModal(false); setEditEvent(null); }}
+          onClose={() => { setShowEventModal(false); setEditEvent(null); setDefaultCalendarIdForCreate(undefined); setDefaultModalAllDay(false); }}
           currentUserEmails={currentUserEmails}
           isMobile={true}
         />
@@ -1298,6 +1408,33 @@ export default function CalendarPage() {
         onSelect={handleScopeSelect}
         onClose={() => setPendingScopeAction(null)}
       />
+
+      <ConfirmDialog {...confirmDialogProps} />
+
+      {showCreateCalendar && client && (
+        <CreateCalendarModal
+          client={client}
+          onClose={() => setShowCreateCalendar(false)}
+        />
+      )}
+
+      {sharingCalendarId && client && (() => {
+        const cal = allCalendars.find((c) => c.id === sharingCalendarId);
+        if (!cal) return null;
+        return (
+          <ShareCollectionDialog
+            client={client}
+            kind="calendar"
+            collectionName={cal.name}
+            shareWith={cal.shareWith}
+            ownAccountId={client.getAccountId()}
+            onShare={async (principalId, rights) => {
+              await shareCalendar(client, cal.id, principalId, rights as CalendarRights | null);
+            }}
+            onClose={() => setSharingCalendarId(null)}
+          />
+        );
+      })()}
     </div>
   );
 }

app/[locale]/contacts/page.tsx

@@ -27,7 +27,8 @@ import { useSidebarApps } from "@/hooks/use-sidebar-apps";
 import { ResizeHandle } from "@/components/layout/resize-handle";
 import { useIsMobile } from "@/hooks/use-media-query";
 import { useRefreshGesture } from "@/hooks/use-refresh-gesture";
-import type { ContactCard, AddressBook } from "@/lib/jmap/types";
+import type { ContactCard, AddressBook, AddressBookRights } from "@/lib/jmap/types";
+import { ShareCollectionDialog } from "@/components/settings/share-collection-dialog";
 
 type View =
   | "list"
@@ -75,6 +76,8 @@ export default function ContactsPage() {
     bulkAddToGroup,
     moveContactToAddressBook,
     renameAddressBook,
+    removeAddressBook,
+    shareAddressBook,
     renameKeyword,
     importContacts,
   } = useContactStore();
@@ -83,6 +86,8 @@ export default function ContactsPage() {
   const [activeCategory, setActiveCategory] = useState<ContactCategory>("all");
   const [showImportDialog, setShowImportDialog] = useState(false);
   const [renamingAddressBook, setRenamingAddressBook] = useState<AddressBook | null>(null);
+  const [sharingAddressBookId, setSharingAddressBookId] = useState<string | null>(null);
+  const [defaultBookIdForCreate, setDefaultBookIdForCreate] = useState<string | undefined>(undefined);
   const [renamingKeyword, setRenamingKeyword] = useState<string | null>(null);
   const [selectedGroupId, setSelectedGroupId] = useState<string | null>(null);
   const hasFetched = useRef(false);
@@ -98,13 +103,20 @@ export default function ContactsPage() {
 
   // Panel resize state - contact list
   const [listWidth, setListWidth] = useState(() => {
-    try { const v = localStorage.getItem("contacts-list-width"); return v ? Number(v) : 320; } catch { return 320; }
+    try { const v = localStorage.getItem("contacts-list-width"); return v ? Number(v) : 384; } catch { return 384; }
   });
   const [isListResizing, setIsListResizing] = useState(false);
-  const listDragStartWidth = useRef(320);
+  const listDragStartWidth = useRef(384);
 
-  // Check auth on mount
+  // Check auth on mount – skip when already authenticated so that navigating
+  // between routes doesn't retrigger checkAuth's transient `{ client: null,
+  // isLoading: true }` reset, which was flashing the spinner on every nav.
   useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
     checkAuth().finally(() => {
       setInitialCheckDone(true);
     });
@@ -172,21 +184,6 @@ export default function ContactsPage() {
     return getGroupMembers(activeCategory.groupId);
   }, [activeCategory, individuals, getGroupMembers]);
 
-  // Label for the current category
-  const categoryLabel = useMemo(() => {
-    if (activeCategory === "all") return t("tabs.all");
-    if (activeCategory === "uncategorized") return t("no_category");
-    if ("addressBookId" in activeCategory) {
-      const book = addressBooks.find(b => b.id === activeCategory.addressBookId);
-      return book?.name || t("tabs.all");
-    }
-    if ("keyword" in activeCategory) {
-      return activeCategory.keyword;
-    }
-    const group = contacts.find(c => c.id === activeCategory.groupId);
-    return group ? getContactDisplayName(group) : t("tabs.all");
-  }, [activeCategory, contacts, addressBooks, t]);
-
   const handleSelectCategory = useCallback((category: ContactCategory) => {
     setActiveCategory(category);
     clearSelection();
@@ -306,6 +303,24 @@ export default function ContactsPage() {
     setView("bulk-add-to-group");
   }, [clearSelection, toggleContactSelection, groups.length]);
 
+  const handleDuplicateContact = useCallback(async (source: ContactCard) => {
+    const { id: _id, created: _created, updated: _updated, ...rest } = source;
+    void _id; void _created; void _updated;
+    const data: Partial<ContactCard> = JSON.parse(JSON.stringify(rest));
+    if (supportsSync && client) {
+      await createContact(client, data);
+      toast.success(t("toast.created"));
+    } else {
+      const localContact: ContactCard = {
+        id: `local-${generateUUID()}`,
+        addressBookIds: data.addressBookIds || {},
+        ...data,
+      };
+      addLocalContact(localContact);
+      toast.success(t("toast.created"));
+    }
+  }, [supportsSync, client, createContact, addLocalContact, t]);
+
   const handleSaveNew = useCallback(async (data: Partial<ContactCard>) => {
     if (supportsSync && client) {
       await createContact(client, data);
@@ -319,6 +334,7 @@ export default function ContactsPage() {
       addLocalContact(localContact);
       toast.success(t("toast.created"));
     }
+    setDefaultBookIdForCreate(undefined);
     setView("list");
   }, [supportsSync, client, createContact, addLocalContact, t]);
 
@@ -336,6 +352,7 @@ export default function ContactsPage() {
   }, [supportsSync, client, selectedContact, updateContact, updateLocalContact, t]);
 
   const handleCancel = () => {
+    setDefaultBookIdForCreate(undefined);
     if (view === "group-create" || view === "group-edit") {
       setView(selectedGroup ? "group-detail" : "list");
     } else if (view === "bulk-add-to-group") {
@@ -507,7 +524,7 @@ export default function ContactsPage() {
   const renderRightPanel = () => {
     switch (view) {
       case "create":
-        return <ContactForm addressBooks={addressBooks} allKeywords={allKeywords} onSave={handleSaveNew} onCancel={handleCancel} />;
+        return <ContactForm addressBooks={addressBooks} allKeywords={allKeywords} defaultAddressBookId={defaultBookIdForCreate} onSave={handleSaveNew} onCancel={handleCancel} />;
 
       case "edit":
         if (!selectedContact) return null;
@@ -607,6 +624,16 @@ export default function ContactsPage() {
             contact={selectedContact}
             onEdit={handleEdit}
             onDelete={handleDelete}
+            onAddToGroup={
+              selectedContact
+                ? () => handleAddContactToGroup(selectedContact.id)
+                : undefined
+            }
+            onDuplicate={
+              selectedContact
+                ? () => void handleDuplicateContact(selectedContact)
+                : undefined
+            }
             isMobile={isMobile}
           />
         );
@@ -670,6 +697,26 @@ export default function ContactsPage() {
                       onDropContacts={handleDropContacts}
                       onDropContactsToCategory={handleDropContactsToCategory}
                       onRenameAddressBook={client ? (book) => setRenamingAddressBook(book) : undefined}
+                      onShareAddressBook={client ? (book) => setSharingAddressBookId(book.id) : undefined}
+                      onCreateContactInBook={(book) => {
+                        setDefaultBookIdForCreate(book.id);
+                        handleCreateNew();
+                      }}
+                      onDeleteAddressBook={client ? async (book) => {
+                        const ok = await confirmDialog({
+                          title: t("address_books.delete"),
+                          message: t("address_books.confirm_delete", { name: book.name }),
+                          variant: "destructive",
+                          confirmText: t("address_books.delete"),
+                        });
+                        if (!ok) return;
+                        try {
+                          await removeAddressBook(client, book);
+                          toast.success(t("address_books.deleted"));
+                        } catch {
+                          toast.error(t("address_books.delete_failed"));
+                        }
+                      } : undefined}
                       onRenameKeyword={(kw) => setRenamingKeyword(kw)}
                     />
                   </div>
@@ -702,7 +749,6 @@ export default function ContactsPage() {
                   onSearchChange={setSearchQuery}
                   onSelectContact={handleSelectContact}
                   onCreateNew={handleCreateNew}
-                  categoryLabel={categoryLabel}
                   className="flex-1"
                   selectedContactIds={selectedContactIds}
                   onToggleSelection={toggleContactSelection}
@@ -726,7 +772,7 @@ export default function ContactsPage() {
                     setIsListResizing(false);
                     localStorage.setItem("contacts-list-width", String(listWidth));
                   }}
-                  onDoubleClick={() => { setListWidth(320); localStorage.setItem("contacts-list-width", "320"); }}
+                  onDoubleClick={() => { setListWidth(384); localStorage.setItem("contacts-list-width", "384"); }}
                 />
               )}
             </>
@@ -819,6 +865,23 @@ export default function ContactsPage() {
           </div>
         </div>
       )}
+      {sharingAddressBookId && client && (() => {
+        const book = addressBooks.find((b) => b.id === sharingAddressBookId);
+        if (!book) return null;
+        return (
+          <ShareCollectionDialog
+            client={client}
+            kind="addressBook"
+            collectionName={book.name}
+            shareWith={book.shareWith}
+            ownAccountId={client.getAccountId()}
+            onShare={async (principalId, rights) => {
+              await shareAddressBook(client, book, principalId, rights as AddressBookRights | null);
+            }}
+            onClose={() => setSharingAddressBookId(null)}
+          />
+        );
+      })()}
     </div>
   );
 }

app/[locale]/files/page.tsx

@@ -105,8 +105,15 @@ export default function FilesPage() {
 
   const detailResource = detailName ? resources.find(r => r.name === detailName) || null : null;
 
-  // Check auth on mount
+  // Check auth on mount – skip when already authenticated so that navigating
+  // between routes doesn't retrigger checkAuth's transient `{ client: null,
+  // isLoading: true }` reset, which was flashing the spinner on every nav.
   useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
     checkAuth().finally(() => {
       setInitialCheckDone(true);
     });

app/[locale]/page.tsx

@@ -8,12 +8,13 @@ import { EmailViewer } from "@/components/email/email-viewer";
 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 { MobileHeader } from "@/components/layout/mobile-header";
 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 { toast } from "@/stores/toast-store";
 import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { useContactStore } from "@/stores/contact-store";
@@ -23,6 +24,7 @@ import { useDeviceDetection } from "@/hooks/use-media-query";
 import { useKeyboardShortcuts } from "@/hooks/use-keyboard-shortcuts";
 import { useRefreshGesture } from "@/hooks/use-refresh-gesture";
 import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
+import { usePromptDialog } from "@/hooks/use-prompt-dialog";
 import { useBrowserNavigation, type NavSnapshot } from "@/hooks/use-browser-navigation";
 import { debug } from "@/lib/debug";
 import { playNotificationSound } from "@/lib/notification-sound";
@@ -35,6 +37,7 @@ import {
   ComposerErrorFallback,
 } from "@/components/error";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
+import { PromptDialog } from "@/components/ui/prompt-dialog";
 import { TotpReauthDialog } from "@/components/totp-reauth-dialog";
 import { DragDropProvider } from "@/contexts/drag-drop-context";
 import { isFilterEmpty, activeFilterCount } from "@/lib/jmap/search-utils";
@@ -48,6 +51,7 @@ import { Input } from "@/components/ui/input";
 import { FilePreviewModal } from "@/components/files/file-preview-modal";
 import { isFilePreviewable } from "@/lib/file-preview";
 import { appendPlainTextSignature } from "@/lib/signature-utils";
+import { computeReplyThreadingHeaders } from "@/lib/email-threading";
 import { Search, Filter, ChevronDown, X, Paperclip, Star, Mail, MailOpen, RotateCcw, PenSquare, PenLine, CheckSquare, Square, AlertTriangle } from "lucide-react";
 import { ResizeHandle } from "@/components/layout/resize-handle";
 import { Button } from "@/components/ui/button";
@@ -67,6 +71,7 @@ export default function Home() {
   const [pendingDraft, setPendingDraft] = useState<ComposerDraftData | null>(null);
   const [composerSessionId, setComposerSessionId] = useState(0);
   const { dialogProps: confirmDialogProps, confirm: confirmDialog } = useConfirmDialog();
+  const { dialogProps: promptDialogProps, prompt: promptDialog } = usePromptDialog();
   const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
   const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
   const [showShortcutsModal, setShowShortcutsModal] = useState(false);
@@ -162,6 +167,16 @@ export default function Home() {
     fetchUnifiedEmails: fetchUnifiedEmailsAction,
     refreshUnifiedCounts,
     exitUnifiedView,
+    emptyMailbox,
+    markMailboxAsRead,
+    createMailbox,
+    renameMailbox,
+    deleteMailbox,
+    batchDelete,
+    batchArchive,
+    batchMarkAsRead,
+    batchMarkAsSpam,
+    batchUndoSpam,
   } = useEmailStore();
 
   const enableUnifiedMailbox = useSettingsStore((s) => s.enableUnifiedMailbox);
@@ -344,27 +359,77 @@ export default function Home() {
     onToggleStar: () => {
       if (selectedEmail) handleToggleStar();
     },
-    onArchive: () => {
-      if (selectedEmail) handleArchive();
+    onArchive: async () => {
+      if (selectedEmailIds.size > 0 && client) {
+        try {
+          await batchArchive(client);
+        } catch (error) {
+          console.error("Failed to batch archive:", error);
+        }
+      } else if (selectedEmail) {
+        handleArchive();
+      }
     },
-    onDelete: () => {
-      if (selectedEmail) handleDelete();
+    onDelete: async () => {
+      if (selectedEmailIds.size > 0 && client) {
+        const currentMailbox = mailboxes.find(m => m.id === selectedMailbox);
+        const isInTrash = currentMailbox?.role === 'trash';
+        const isInJunk = currentMailbox?.role === 'junk';
+        const permanentlyDeleteJunk = useSettingsStore.getState().permanentlyDeleteJunk;
+        const permanent = isInTrash || (isInJunk && permanentlyDeleteJunk);
+        const confirmed = await confirmDialog({
+          title: permanent
+            ? t('email_list.permanent_delete_confirm_title')
+            : t('email_list.batch_actions.delete_confirm_title'),
+          message: permanent
+            ? t('email_list.permanent_delete_confirm_batch_message', { count: selectedEmailIds.size })
+            : t('email_list.batch_actions.delete_confirm_message', { count: selectedEmailIds.size }),
+          confirmText: permanent
+            ? t('email_list.permanent_delete')
+            : t('email_list.batch_actions.delete'),
+          variant: "destructive",
+        });
+        if (!confirmed) return;
+        try {
+          await batchDelete(client, permanent);
+        } catch (error) {
+          console.error("Failed to batch delete:", error);
+        }
+      } else if (selectedEmail) {
+        handleDelete();
+      }
     },
     onMarkAsUnread: async () => {
-      if (selectedEmail && client) {
+      if (!client) return;
+      if (selectedEmailIds.size > 0) {
+        await batchMarkAsRead(client, false);
+      } else if (selectedEmail) {
         await markAsRead(client, selectedEmail.id, false);
       }
     },
     onMarkAsRead: async () => {
-      if (selectedEmail && client) {
+      if (!client) return;
+      if (selectedEmailIds.size > 0) {
+        await batchMarkAsRead(client, true);
+      } else if (selectedEmail) {
         await markAsRead(client, selectedEmail.id, true);
       }
     },
-    onToggleSpam: () => {
-      if (selectedEmail) {
-        // Check if we're in junk folder
-        const currentMailbox = mailboxes.find(m => m.id === selectedMailbox);
-        const isInJunk = currentMailbox?.role === 'junk';
+    onToggleSpam: async () => {
+      const currentMailbox = mailboxes.find(m => m.id === selectedMailbox);
+      const isInJunk = currentMailbox?.role === 'junk';
+      if (selectedEmailIds.size > 0 && client) {
+        const ids = Array.from(selectedEmailIds);
+        try {
+          if (isInJunk) {
+            await batchUndoSpam(client, ids);
+          } else {
+            await batchMarkAsSpam(client, ids);
+          }
+        } catch (error) {
+          console.error("Failed to batch toggle spam:", error);
+        }
+      } else if (selectedEmail) {
         if (isInJunk) {
           handleUndoSpam();
         } else {
@@ -399,13 +464,14 @@ export default function Home() {
       clearSelection();
     },
   // eslint-disable-next-line react-hooks/exhaustive-deps
-  }), [emails, selectedEmail, client, selectedMailbox, isMobile, isTablet]);
+  }), [emails, selectedEmail, client, selectedMailbox, isMobile, isTablet, selectedEmailIds, mailboxes]);
 
   // Initialize keyboard shortcuts
   useKeyboardShortcuts({
     enabled: isAuthenticated && !showComposer,
     emails,
     selectedEmailId: selectedEmail?.id,
+    selectionCount: selectedEmailIds.size,
     handlers: keyboardHandlers,
   });
 
@@ -455,8 +521,15 @@ export default function Home() {
     document.title = title;
   }, [showComposer, composerMode, selectedEmail, selectedMailbox, mailboxes, t, appName]);
 
-  // Check auth on mount
+  // Check auth on mount – skip when already authenticated so that navigating
+  // between routes doesn't retrigger checkAuth's transient `{ client: null,
+  // isLoading: true }` reset, which was flashing the spinner on every nav.
   useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
     checkAuth().finally(() => {
       setInitialCheckDone(true);
     });
@@ -493,7 +566,10 @@ export default function Home() {
   // Load mailboxes and emails when authenticated (only if not already loaded)
   useEffect(() => {
     if (isAuthenticated && client && mailboxes.length === 0) {
-      const loadData = async () => {
+      let retryTimer: ReturnType<typeof setTimeout> | null = null;
+      let cancelled = false;
+
+      const loadData = async (attempt = 1) => {
         try {
           // First fetch mailboxes and quota (inbox will be auto-selected in fetchMailboxes)
           await Promise.all([
@@ -505,6 +581,15 @@ export default function Home() {
           const state = useEmailStore.getState();
           const selectedMailboxId = state.selectedMailbox;
 
+          // On first login the server may still be provisioning mailboxes.
+          // Retry a few times with back-off before giving up.
+          if (state.mailboxes.length === 0 && attempt <= 5 && !cancelled) {
+            const delay = Math.min(1000 * attempt, 5000);
+            debug.log('jmap', `[Mailbox] No mailboxes returned (attempt ${attempt}), retrying in ${delay}ms`);
+            retryTimer = setTimeout(() => loadData(attempt + 1), delay);
+            return;
+          }
+
           // Fetch emails for the selected mailbox
           if (selectedMailboxId) {
             await fetchEmails(client, selectedMailboxId);
@@ -538,6 +623,12 @@ export default function Home() {
         }
       };
       loadData();
+
+      return () => {
+        cancelled = true;
+        if (retryTimer) clearTimeout(retryTimer);
+        client.closePushNotifications();
+      };
     }
 
     // Cleanup push notifications on unmount
@@ -561,11 +652,50 @@ export default function Home() {
     });
   }, [enableUnifiedMailbox, isAuthenticated, client, mailboxes, connectedAccountsSignature, buildUnifiedAccounts, populateUnifiedAccountMailboxes, refreshUnifiedCounts]);
 
+  // System-notification click handler. The push SW navigates the user back
+  // here with `?email=<id>` (specific email it built the toast from) or
+  // `?openLatestUnread=1` (generic "New mail" toast — happens when the
+  // preview API failed). We resolve those params once after the inbox has
+  // finished loading and open the right message, then strip the params so a
+  // refresh doesn't re-open it.
+  const notificationParamHandledRef = useRef(false);
+  useEffect(() => {
+    if (notificationParamHandledRef.current) return;
+    if (!isAuthenticated || !client) return;
+    if (mailboxes.length === 0) return;
+
+    const params = new URLSearchParams(window.location.search);
+    const emailIdParam = params.get('email');
+    const openLatestUnread = params.get('openLatestUnread') === '1';
+    if (!emailIdParam && !openLatestUnread) return;
+
+    // For the latest-unread case we need the inbox emails loaded; bail and
+    // let the effect re-run once `emails` is populated.
+    if (openLatestUnread && emails.length === 0) return;
+
+    notificationParamHandledRef.current = true;
+    window.history.replaceState({}, '', window.location.pathname);
+
+    if (emailIdParam) {
+      setLoadingEmail(true);
+      fetchEmailContent(client, emailIdParam).finally(() => setLoadingEmail(false));
+      return;
+    }
+
+    // emails are sorted receivedAt-desc, so the first unread is the newest.
+    const newestUnread = emails.find(e => !e.keywords?.$seen);
+    if (newestUnread) {
+      selectEmail(newestUnread);
+    }
+  }, [isAuthenticated, client, mailboxes.length, emails, fetchEmailContent, selectEmail, setLoadingEmail]);
+
   // 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) {
+    // If the email lacks bodyValues, it was auto-selected from the list and needs full content.
+    // Skip when handleEmailSelect already started a fetch (it sets isLoadingEmail before
+    // calling selectEmail on the stub), to avoid a duplicate request.
+    if (!selectedEmail.bodyValues && !isLoadingEmail) {
       const perAccountClient = isUnifiedView && selectedEmail.accountId
         ? useAuthStore.getState().getClientForAccount(selectedEmail.accountId)
         : undefined;
@@ -660,6 +790,8 @@ export default function Home() {
     fromName?: string;
     identityId?: string;
     attachments?: Array<{ blobId: string; name: string; type: string; size: number; disposition?: 'attachment' | 'inline'; cid?: string }>;
+    inReplyTo?: string[];
+    references?: string[];
   }) => {
     if (!client) return;
 
@@ -667,7 +799,7 @@ export default function Home() {
       const effectiveMode = pendingDraft?.mode ?? composerMode;
       const originalEmailId = selectedEmail?.id;
 
-      await sendEmail(client, data.to, data.subject, data.body, data.cc, data.bcc, data.identityId, data.fromEmail, data.draftId, data.fromName, data.htmlBody, data.attachments);
+      await sendEmail(client, data.to, data.subject, data.body, data.cc, data.bcc, data.identityId, data.fromEmail, data.draftId, data.fromName, data.htmlBody, data.attachments, data.inReplyTo, data.references);
       setShowComposer(false);
 
       // Mark the original email with $answered or $forwarded keyword
@@ -813,8 +945,11 @@ export default function Home() {
   const handleArchive = async (emailToArchive: Email | null = selectedEmail) => {
     if (!client || !emailToArchive) return;
 
-    // Find archive mailbox
-    const archiveMailbox = mailboxes.find(m => m.role === "archive" || m.name.toLowerCase() === "archive");
+    // Read fresh mailboxes from the store – batch archive calls this in a loop,
+    // and each iteration needs to see folders created by prior iterations.
+    const currentMailboxes = useEmailStore.getState().mailboxes;
+
+    const archiveMailbox = currentMailboxes.find(m => m.role === "archive" || m.name.toLowerCase() === "archive");
     if (!archiveMailbox) return;
 
     const { archiveMode } = useSettingsStore.getState();
@@ -823,14 +958,12 @@ export default function Home() {
       if (archiveMode === 'single') {
         await moveThreadToMailbox(client, emailToArchive.id, archiveMailbox.id);
       } else {
-        // Determine year/month from the email's received date
         const emailDate = new Date(emailToArchive.receivedAt);
         const year = emailDate.getFullYear().toString();
         const month = (emailDate.getMonth() + 1).toString().padStart(2, '0');
         const archiveId = archiveMailbox.originalId || archiveMailbox.id;
 
-        // Find or create year subfolder under archive
-        let yearMailbox = mailboxes.find(
+        let yearMailbox = currentMailboxes.find(
           m => m.name === year && m.parentId === archiveId
         );
         if (!yearMailbox) {
@@ -841,9 +974,9 @@ export default function Home() {
         if (archiveMode === 'year') {
           await moveThreadToMailbox(client, emailToArchive.id, yearMailbox.id);
         } else {
-          // archiveMode === 'month' - find or create month subfolder under year
           const yearId = yearMailbox.originalId || yearMailbox.id;
-          let monthMailbox = mailboxes.find(
+          const afterYear = useEmailStore.getState().mailboxes;
+          let monthMailbox = afterYear.find(
             m => m.name === month && m.parentId === yearId
           );
           if (!monthMailbox) {
@@ -1071,6 +1204,197 @@ export default function Home() {
     }
   };
 
+  const tCtxMenu = t;
+
+  const handleMarkFolderRead = async (mailboxId: string) => {
+    if (!client) return;
+    try {
+      const count = await markMailboxAsRead(client, mailboxId);
+      await fetchMailboxes(client);
+      if (selectedMailbox === mailboxId) await fetchEmails(client, mailboxId);
+      if (count > 0) {
+        toast.success(tCtxMenu('mailbox_context_menu.toast_marked_read_count', { count }));
+      } else {
+        toast.success(tCtxMenu('mailbox_context_menu.toast_already_read'));
+      }
+    } catch {
+      toast.error(tCtxMenu('mailbox_context_menu.toast_error_mark_read'));
+    }
+  };
+
+  const handleMarkFolderTreeRead = async (mailboxId: string) => {
+    if (!client) return;
+    const collectIds = (rootId: string): string[] => {
+      const ids: string[] = [rootId];
+      const stack = [rootId];
+      while (stack.length > 0) {
+        const current = stack.pop()!;
+        for (const mb of mailboxes) {
+          if (mb.parentId === current) {
+            ids.push(mb.id);
+            stack.push(mb.id);
+          }
+        }
+      }
+      return ids;
+    };
+
+    try {
+      const ids = collectIds(mailboxId);
+      let total = 0;
+      for (const id of ids) {
+        total += await markMailboxAsRead(client, id);
+      }
+      await fetchMailboxes(client);
+      if (selectedMailbox && ids.includes(selectedMailbox)) await fetchEmails(client, selectedMailbox);
+      if (total > 0) {
+        toast.success(tCtxMenu('mailbox_context_menu.toast_marked_read_count', { count: total }));
+      } else {
+        toast.success(tCtxMenu('mailbox_context_menu.toast_already_read'));
+      }
+    } catch {
+      toast.error(tCtxMenu('mailbox_context_menu.toast_error_mark_read'));
+    }
+  };
+
+  const handleMarkAllFoldersRead = async () => {
+    if (!client) return;
+
+    const confirmed = await confirmDialog({
+      title: tCtxMenu('mailbox_context_menu.mark_all_confirm_title'),
+      message: tCtxMenu('mailbox_context_menu.mark_all_confirm_message'),
+      confirmText: tCtxMenu('mailbox_context_menu.mark_all_folders_read'),
+      variant: "default",
+    });
+    if (!confirmed) return;
+
+    try {
+      const total = await client.markAllAsRead();
+      await fetchMailboxes(client);
+      if (selectedMailbox) await fetchEmails(client, selectedMailbox);
+      if (total > 0) {
+        toast.success(tCtxMenu('mailbox_context_menu.toast_marked_read_count', { count: total }));
+      } else {
+        toast.success(tCtxMenu('mailbox_context_menu.toast_already_read'));
+      }
+    } catch {
+      toast.error(tCtxMenu('mailbox_context_menu.toast_error_mark_read'));
+    }
+  };
+
+  const handleEmptyFolderFromContextMenu = async (mailboxId: string) => {
+    if (!client) return;
+    const mailbox = mailboxes.find(mb => mb.id === mailboxId);
+    if (!mailbox) return;
+
+    const confirmed = await confirmDialog({
+      title: tCtxMenu('email_list.empty_folder.confirm_title'),
+      message: tCtxMenu('email_list.empty_folder.confirm_message'),
+      confirmText: tCtxMenu('email_list.empty_folder.confirm_button'),
+      variant: "destructive",
+    });
+    if (!confirmed) return;
+
+    try {
+      await emptyMailbox(client, mailboxId);
+      toast.success(tCtxMenu('mailbox_context_menu.toast_emptied'));
+    } catch {
+      toast.error(tCtxMenu('mailbox_context_menu.toast_error_empty'));
+    }
+  };
+
+  const handleCreateSubfolderFromContextMenu = async (parentId: string) => {
+    if (!client) return;
+    const name = await promptDialog({
+      title: tCtxMenu('mailbox_context_menu.new_subfolder'),
+      message: tCtxMenu('mailbox_context_menu.prompt_new_subfolder'),
+      placeholder: tCtxMenu('mailbox_context_menu.placeholder_folder_name'),
+      confirmText: tCtxMenu('mailbox_context_menu.create'),
+    });
+    if (!name) return;
+    try {
+      await createMailbox(client, name, parentId);
+      toast.success(tCtxMenu('mailbox_context_menu.toast_folder_created'));
+    } catch {
+      toast.error(tCtxMenu('mailbox_context_menu.toast_error_create'));
+    }
+  };
+
+  const handleCreateFolderFromContextMenu = async () => {
+    if (!client) return;
+    const name = await promptDialog({
+      title: tCtxMenu('mailbox_context_menu.new_folder'),
+      message: tCtxMenu('mailbox_context_menu.prompt_new_folder'),
+      placeholder: tCtxMenu('mailbox_context_menu.placeholder_folder_name'),
+      confirmText: tCtxMenu('mailbox_context_menu.create'),
+    });
+    if (!name) return;
+    try {
+      await createMailbox(client, name);
+      toast.success(tCtxMenu('mailbox_context_menu.toast_folder_created'));
+    } catch {
+      toast.error(tCtxMenu('mailbox_context_menu.toast_error_create'));
+    }
+  };
+
+  const handleRenameFolderFromContextMenu = async (mailboxId: string) => {
+    if (!client) return;
+    const mailbox = mailboxes.find(mb => mb.id === mailboxId);
+    if (!mailbox) return;
+    const name = await promptDialog({
+      title: tCtxMenu('mailbox_context_menu.rename'),
+      message: tCtxMenu('mailbox_context_menu.prompt_rename'),
+      placeholder: tCtxMenu('mailbox_context_menu.placeholder_folder_name'),
+      defaultValue: mailbox.name,
+      confirmText: tCtxMenu('mailbox_context_menu.rename_confirm'),
+    });
+    if (!name || name === mailbox.name) return;
+    try {
+      await renameMailbox(client, mailboxId, name);
+      toast.success(tCtxMenu('mailbox_context_menu.toast_folder_renamed'));
+    } catch {
+      toast.error(tCtxMenu('mailbox_context_menu.toast_error_rename'));
+    }
+  };
+
+  const handleDeleteFolderFromContextMenu = async (mailboxId: string) => {
+    if (!client) return;
+    const mailbox = mailboxes.find(mb => mb.id === mailboxId);
+    if (!mailbox) return;
+
+    const confirmed = await confirmDialog({
+      title: tCtxMenu('mailbox_context_menu.delete_confirm_title'),
+      message: tCtxMenu('mailbox_context_menu.delete_confirm_message', { name: mailbox.name }),
+      confirmText: tCtxMenu('mailbox_context_menu.delete_folder'),
+      variant: "destructive",
+    });
+    if (!confirmed) return;
+
+    try {
+      await deleteMailbox(client, mailboxId);
+      toast.success(tCtxMenu('mailbox_context_menu.toast_folder_deleted'));
+    } catch (err: unknown) {
+      const jmapType = (err as Error & { jmapType?: string })?.jmapType;
+      if (jmapType === 'mailboxHasChild') {
+        toast.error(tCtxMenu('mailbox_context_menu.toast_error_delete_has_children'));
+      } else if (jmapType === 'mailboxHasEmail') {
+        toast.error(tCtxMenu('mailbox_context_menu.toast_error_delete_has_email'));
+      } else {
+        toast.error(tCtxMenu('mailbox_context_menu.toast_error_delete'));
+      }
+    }
+  };
+
+  const handleRefreshMailboxes = async () => {
+    if (!client) return;
+    try {
+      await fetchMailboxes(client);
+      if (selectedMailbox) await fetchEmails(client, selectedMailbox);
+    } catch {
+      // silent
+    }
+  };
+
   const handleLogout = logout;
 
   const handleSearch = async (query: string) => {
@@ -1167,6 +1491,12 @@ export default function Home() {
 
     const originalEmailId = selectedEmail.id;
 
+    // RFC 5322 §3.6.4 threading — keep the conversation stitched together (#234).
+    const threading = computeReplyThreadingHeaders({
+      messageId: selectedEmail.messageId,
+      references: selectedEmail.references,
+    });
+
     // Send reply with just the body text
     await sendEmail(
       client,
@@ -1178,7 +1508,11 @@ export default function Home() {
       primaryIdentity?.id,
       primaryIdentity?.email,
       undefined,
-      primaryIdentity?.name || undefined
+      primaryIdentity?.name || undefined,
+      undefined,
+      undefined,
+      threading?.inReplyTo,
+      threading?.references,
     );
 
     // Mark the original email as answered
@@ -1220,7 +1554,13 @@ export default function Home() {
       setShowComposer(false);
     }
 
-    // Set loading state immediately (keep current email visible)
+    // Show the list stub immediately so subject/sender render without
+    // waiting for the body fetch — avoids the loading flicker.
+    const listEmail = emails.find(e => e.id === email.id);
+    if (listEmail) {
+      selectEmail(listEmail);
+    }
+
     setLoadingEmail(true);
 
     // On mobile, switch to viewer
@@ -1237,7 +1577,6 @@ export default function Home() {
     try {
       // 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)
@@ -1269,15 +1608,11 @@ export default function Home() {
   };
 
   // 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.
+  // Reset to list state directly. We can't just call window.history.back()
+  // because the nav hook pushes a new entry for every email the user opens,
+  // so history.back() would pop to the previous email rather than the list.
+  // The OS / hardware back button is still wired through popstate → handleNavRestore.
   const handleMobileBack = () => {
-    if (typeof window !== 'undefined') {
-      window.history.back();
-      return;
-    }
     if (conversationThread) {
       setConversationThread(null);
       setConversationEmails([]);
@@ -1432,6 +1767,15 @@ export default function Home() {
               onMailboxSelect={handleMailboxSelect}
               onTagSelect={handleTagSelect}
               onUnreadFilterClick={handleUnreadFilterClick}
+              onMarkFolderRead={handleMarkFolderRead}
+              onMarkFolderTreeRead={handleMarkFolderTreeRead}
+              onMarkAllFoldersRead={handleMarkAllFoldersRead}
+              onEmptyFolder={handleEmptyFolderFromContextMenu}
+              onCreateSubfolder={handleCreateSubfolderFromContextMenu}
+              onCreateFolder={handleCreateFolderFromContextMenu}
+              onRenameFolder={handleRenameFolderFromContextMenu}
+              onDeleteFolder={handleDeleteFolderFromContextMenu}
+              onRefreshMailboxes={handleRefreshMailboxes}
               onCompose={() => {
                 setComposerMode('compose');
                 setShowComposer(true);
@@ -1492,9 +1836,12 @@ export default function Home() {
                         } else {
                           selectAllEmails();
                         }
-                      } else {
-                        // Enter selection mode by selecting the first email
-                        if (emails.length > 0) toggleEmailSelection(emails[0].id);
+                      } else if (emails.length > 0) {
+                        const currentId = selectedEmail?.id;
+                        const target = currentId && emails.some((e) => e.id === currentId)
+                          ? currentId
+                          : emails[0].id;
+                        toggleEmailSelection(target);
                       }
                     }}
                     className={cn(
@@ -1821,6 +2168,9 @@ export default function Home() {
                     htmlBody: selectedEmail.bodyValues?.[selectedEmail.htmlBody?.[0]?.partId || '']?.value || undefined,
                     receivedAt: selectedEmail.receivedAt,
                     attachments: selectedEmail.attachments,
+                    messageId: selectedEmail.messageId,
+                    inReplyTo: selectedEmail.inReplyTo,
+                    references: selectedEmail.references,
                   } : undefined)}
                   initialDraftText={composerDraftText}
                   initialData={pendingDraft}
@@ -1898,14 +2248,6 @@ export default function Home() {
               />
             ) : (
               <>
-                {/* Mobile Header for Viewer */}
-                {isMobile && activeView === "viewer" && (
-                  <MobileViewerHeader
-                    subject={selectedEmail?.subject}
-                    onBack={handleMobileBack}
-                  />
-                )}
-
                 <ErrorBoundary fallback={EmailViewerErrorFallback}>
                   <EmailViewer
                     email={selectedEmail}
@@ -1913,12 +2255,12 @@ export default function Home() {
                     onReply={handleReply}
                     onReplyAll={handleReplyAll}
                     onForward={handleForward}
-                    onDelete={handleDelete}
+                    onDelete={() => handleDelete()}
                     onArchive={() => handleArchive()}
                     onToggleStar={handleToggleStar}
                     onSetColorTag={handleSetColorTag}
-                    onMarkAsSpam={handleMarkAsSpam}
-                    onUndoSpam={handleUndoSpam}
+                    onMarkAsSpam={() => handleMarkAsSpam()}
+                    onUndoSpam={() => handleUndoSpam()}
                     onMarkAsRead={async (emailId, read) => {
                       if (client) {
                         await markAsRead(client, emailId, read);
@@ -1988,6 +2330,7 @@ export default function Home() {
 
         <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
         <ConfirmDialog {...confirmDialogProps} />
+        <PromptDialog {...promptDialogProps} />
         <TotpReauthDialog />
       </div>
     </DragDropProvider>

app/[locale]/settings/page.tsx

@@ -9,7 +9,6 @@ import {
   LogOut,
   Settings as SettingsIcon,
   Palette,
-  Mail,
   User,
   Shield,
   UserPen,
@@ -20,17 +19,27 @@ import {
   FolderOpen,
   Tags,
   HardDrive,
-  Wrench,
   BookUser,
   KeyRound,
   PanelLeftClose,
   Bell,
   Puzzle,
+  LayoutGrid,
+  BookOpen,
+  PenLine,
+  EyeOff,
+  Languages,
+  Info,
+  Bug,
   type LucideIcon,
 } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { AppearanceSettings } from '@/components/settings/appearance-settings';
-import { EmailSettings } from '@/components/settings/email-settings';
+import { LayoutSettings } from '@/components/settings/layout-settings';
+import { LanguageSettings } from '@/components/settings/language-settings';
+import { ReadingSettings } from '@/components/settings/reading-settings';
+import { ComposingSettings } from '@/components/settings/composing-settings';
+import { ContentSendersSettings } from '@/components/settings/content-senders-settings';
 import { AccountSettings } from '@/components/settings/account-settings';
 import { IdentitySettings } from '@/components/settings/identity-settings';
 import { VacationSettings } from '@/components/settings/vacation-settings';
@@ -39,7 +48,8 @@ import { CalendarManagementSettings } from '@/components/settings/calendar-manag
 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';
+import { AboutDataSettings } from '@/components/settings/about-data-settings';
+import { DebugSettings } from '@/components/settings/debug-settings';
 import { FolderSettings } from '@/components/settings/folder-settings';
 import { KeywordSettings } from '@/components/settings/keyword-settings';
 import { AccountSecuritySettings } from '@/components/settings/account-security-settings';
@@ -62,8 +72,33 @@ import { useConfig } from '@/hooks/use-config';
 import { usePolicyStore } from '@/stores/policy-store';
 import { cn } from '@/lib/utils';
 
-type Tab = 'appearance' | 'email' | 'notifications' | 'account' | 'security' | 'identities' | 'encryption' | 'vacation' | 'calendar' | 'contacts' | 'filters' | 'templates' | 'folders' | 'keywords' | 'files' | 'sidebar_apps' | 'themes' | 'plugins' | 'advanced';
-type TabGroup = 'general' | 'account' | 'organization' | 'apps' | 'system';
+type Tab =
+  | 'account'
+  | 'language'
+  | 'notifications'
+  | 'appearance'
+  | 'layout'
+  | 'reading'
+  | 'composing'
+  | 'identities'
+  | 'vacation'
+  | 'filters'
+  | 'templates'
+  | 'folders'
+  | 'keywords'
+  | 'security'
+  | 'encryption'
+  | 'content_senders'
+  | 'calendar'
+  | 'contacts'
+  | 'files'
+  | 'sidebar_apps'
+  | 'about_data'
+  | 'themes'
+  | 'plugins'
+  | 'debug';
+
+type TabGroup = 'general' | 'appearance' | 'mail' | 'privacy' | 'apps' | 'advanced';
 
 interface TabDef {
   id: Tab;
@@ -74,28 +109,54 @@ interface TabDef {
 }
 
 const tabIcons: Record<Tab, LucideIcon> = {
-  appearance: Palette,
-  email: Mail,
-  notifications: Bell,
   account: User,
-  security: Shield,
+  language: Languages,
+  notifications: Bell,
+  appearance: Palette,
+  layout: LayoutGrid,
+  reading: BookOpen,
+  composing: PenLine,
   identities: UserPen,
-  encryption: KeyRound,
   vacation: PalmtreeIcon,
-  calendar: Calendar,
-  contacts: BookUser,
   filters: Filter,
   templates: FileText,
   folders: FolderOpen,
   keywords: Tags,
+  security: Shield,
+  encryption: KeyRound,
+  content_senders: EyeOff,
+  calendar: Calendar,
+  contacts: BookUser,
   files: HardDrive,
   sidebar_apps: PanelLeftClose,
+  about_data: Info,
   themes: Palette,
   plugins: Puzzle,
-  advanced: Wrench,
+  debug: Bug,
 };
 
-const tabGroupOrder: TabGroup[] = ['general', 'account', 'organization', 'apps', 'system'];
+const tabGroupOrder: TabGroup[] = ['general', 'appearance', 'mail', 'privacy', 'apps', 'advanced'];
+
+// Map legacy tab IDs to current ones; runs once on read of localStorage.
+const LEGACY_TAB_MAP: Record<string, Tab> = {
+  email: 'reading',
+  advanced: 'about_data',
+};
+
+function readPersistedTab(): Tab {
+  try {
+    const saved = localStorage.getItem('settings-active-tab');
+    if (!saved) return 'appearance';
+    if (saved in LEGACY_TAB_MAP) {
+      const migrated = LEGACY_TAB_MAP[saved];
+      try { localStorage.setItem('settings-active-tab', migrated); } catch { /* ignore */ }
+      return migrated;
+    }
+    return saved as Tab;
+  } catch {
+    return 'appearance';
+  }
+}
 
 export default function SettingsPage() {
   const router = useRouter();
@@ -107,13 +168,7 @@ export default function SettingsPage() {
   const { quota, isPushConnected } = useEmailStore();
   const { stalwartFeaturesEnabled } = useConfig();
   const { isFeatureEnabled } = usePolicyStore();
-  const [activeTab, setActiveTab] = useState<Tab>(() => {
-    try {
-      const saved = localStorage.getItem('settings-active-tab');
-      if (saved) return saved as Tab;
-    } catch { /* ignore */ }
-    return 'appearance';
-  });
+  const [activeTab, setActiveTab] = useState<Tab>(readPersistedTab);
   const [mobileShowContent, setMobileShowContent] = useState(false);
   const isDesktop = useIsDesktop();
 
@@ -124,21 +179,28 @@ export default function SettingsPage() {
   const [isResizing, setIsResizing] = useState(false);
   const dragStartWidth = useRef(256);
 
-  // Check auth on mount
+  // Check auth on mount – skip when already authenticated so that navigating
+  // between routes doesn't retrigger checkAuth's transient `{ client: null,
+  // isLoading: true }` reset, which was flashing the spinner on every nav.
   useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
     checkAuth().finally(() => {
       setInitialCheckDone(true);
     });
   }, [checkAuth]);
 
-  // Listen for tab change events from child components
+  // Listen for tab change events from child components (with legacy migration)
   useEffect(() => {
     const handler = (e: Event) => {
-      const tab = (e as CustomEvent).detail as Tab;
-      if (tab) {
-        setActiveTab(tab);
-        try { localStorage.setItem('settings-active-tab', tab); } catch { /* ignore */ }
-      }
+      const raw = (e as CustomEvent).detail as string;
+      if (!raw) return;
+      const tab = (LEGACY_TAB_MAP[raw] ?? raw) as Tab;
+      setActiveTab(tab);
+      try { localStorage.setItem('settings-active-tab', tab); } catch { /* ignore */ }
     };
     window.addEventListener('settings-tab-change', handler);
     return () => window.removeEventListener('settings-tab-change', handler);
@@ -161,25 +223,41 @@ export default function SettingsPage() {
   const supportsFiles = client?.supportsFiles() ?? false;
 
   const tabs: TabDef[] = [
-    { id: 'appearance', label: t('tabs.appearance'), icon: tabIcons.appearance, group: 'general' },
-    { id: 'email', label: t('tabs.email'), icon: tabIcons.email, group: 'general' },
+    // General
+    { id: 'account', label: t('tabs.account'), icon: tabIcons.account, group: 'general' },
+    { id: 'language', label: t('tabs.language'), icon: tabIcons.language, group: 'general' },
     { id: 'notifications', label: t('tabs.notifications'), icon: tabIcons.notifications, group: 'general' },
-    { id: 'account', label: t('tabs.account'), icon: tabIcons.account, group: 'account' },
-    ...(stalwartFeaturesEnabled ? [{ id: 'security' as Tab, label: t('tabs.security'), icon: tabIcons.security, group: 'account' as TabGroup }] : []),
-    { id: 'identities', label: t('tabs.identities'), icon: tabIcons.identities, group: 'account' },
-    ...(isFeatureEnabled('smimeEnabled') ? [{ id: 'encryption' as Tab, label: t('tabs.encryption'), icon: tabIcons.encryption, group: 'account' as TabGroup }] : []),
-    ...(supportsVacation ? [{ id: 'vacation' as Tab, label: t('tabs.vacation'), icon: tabIcons.vacation, group: 'account' as TabGroup }] : []),
-    ...(supportsSieve ? [{ id: 'filters' as Tab, label: t('tabs.filters'), icon: tabIcons.filters, group: 'organization' as TabGroup }] : []),
-    ...(isFeatureEnabled('templatesEnabled') ? [{ id: 'templates' as Tab, label: t('tabs.templates'), icon: tabIcons.templates, group: 'organization' as TabGroup }] : []),
-    { id: 'folders', label: t('tabs.folders'), icon: tabIcons.folders, group: 'organization' },
-    ...(isFeatureEnabled('customKeywordsEnabled') ? [{ id: 'keywords' as Tab, label: t('tabs.keywords'), icon: tabIcons.keywords, group: 'organization' as TabGroup }] : []),
+
+    // Appearance
+    { id: 'appearance', label: t('tabs.appearance'), icon: tabIcons.appearance, group: 'appearance' },
+    { id: 'layout', label: t('tabs.layout'), icon: tabIcons.layout, group: 'appearance' },
+
+    // Mail
+    { id: 'reading', label: t('tabs.reading'), icon: tabIcons.reading, group: 'mail' },
+    { id: 'composing', label: t('tabs.composing'), icon: tabIcons.composing, group: 'mail' },
+    { id: 'identities', label: t('tabs.identities'), icon: tabIcons.identities, group: 'mail' },
+    ...(supportsVacation ? [{ id: 'vacation' as Tab, label: t('tabs.vacation'), icon: tabIcons.vacation, group: 'mail' as TabGroup }] : []),
+    ...(supportsSieve ? [{ id: 'filters' as Tab, label: t('tabs.filters'), icon: tabIcons.filters, group: 'mail' as TabGroup }] : []),
+    ...(isFeatureEnabled('templatesEnabled') ? [{ id: 'templates' as Tab, label: t('tabs.templates'), icon: tabIcons.templates, group: 'mail' as TabGroup }] : []),
+    { id: 'folders', label: t('tabs.folders'), icon: tabIcons.folders, group: 'mail' },
+    ...(isFeatureEnabled('customKeywordsEnabled') ? [{ id: 'keywords' as Tab, label: t('tabs.keywords'), icon: tabIcons.keywords, group: 'mail' as TabGroup }] : []),
+
+    // Privacy & Security
+    ...(stalwartFeaturesEnabled ? [{ id: 'security' as Tab, label: t('tabs.security'), icon: tabIcons.security, group: 'privacy' as TabGroup }] : []),
+    ...(isFeatureEnabled('smimeEnabled') ? [{ id: 'encryption' as Tab, label: t('tabs.encryption'), icon: tabIcons.encryption, group: 'privacy' as TabGroup }] : []),
+    { id: 'content_senders', label: t('tabs.content_senders'), icon: tabIcons.content_senders, group: 'privacy' },
+
+    // Apps
     ...(supportsCalendar ? [{ id: 'calendar' as Tab, label: t('tabs.calendar'), icon: tabIcons.calendar, group: 'apps' as TabGroup }] : []),
     { id: 'contacts', label: t('tabs.contacts'), icon: tabIcons.contacts, group: 'apps' },
     ...(supportsFiles ? [{ id: 'files' as Tab, label: t('tabs.files'), icon: tabIcons.files, group: 'apps' as TabGroup }] : []),
     ...(isFeatureEnabled('sidebarAppsEnabled') ? [{ id: 'sidebar_apps' as Tab, label: t('tabs.sidebar_apps'), icon: tabIcons.sidebar_apps, group: 'apps' as TabGroup }] : []),
-    ...(isFeatureEnabled('themesEnabled') ? [{ id: 'themes' as Tab, label: 'Themes', icon: tabIcons.themes, group: 'system' as TabGroup, experimental: true }] : []),
-    ...(isFeatureEnabled('pluginsEnabled') ? [{ id: 'plugins' as Tab, label: 'Plugins', icon: tabIcons.plugins, group: 'system' as TabGroup, experimental: true }] : []),
-    { id: 'advanced', label: t('tabs.advanced'), icon: tabIcons.advanced, group: 'system' },
+
+    // Advanced
+    { id: 'about_data', label: t('tabs.about_data'), icon: tabIcons.about_data, group: 'advanced' },
+    ...(isFeatureEnabled('themesEnabled') ? [{ id: 'themes' as Tab, label: 'Themes', icon: tabIcons.themes, group: 'advanced' as TabGroup, experimental: true }] : []),
+    ...(isFeatureEnabled('pluginsEnabled') ? [{ id: 'plugins' as Tab, label: 'Plugins', icon: tabIcons.plugins, group: 'advanced' as TabGroup, experimental: true }] : []),
+    ...(isFeatureEnabled('debugModeEnabled') ? [{ id: 'debug' as Tab, label: t('tabs.debug'), icon: tabIcons.debug, group: 'advanced' as TabGroup }] : []),
   ];
 
   // Group tabs by category
@@ -191,6 +269,10 @@ export default function SettingsPage() {
     }))
     .filter((g) => g.items.length > 0);
 
+  // If active tab is not in the visible list (e.g., feature disabled), fall back.
+  const isActiveVisible = tabs.some((tab) => tab.id === activeTab);
+  const effectiveActiveTab: Tab = isActiveVisible ? activeTab : 'appearance';
+
   const handleTabSelect = (tabId: Tab) => {
     setActiveTab(tabId);
     try { localStorage.setItem('settings-active-tab', tabId); } catch { /* ignore */ }
@@ -199,39 +281,42 @@ export default function SettingsPage() {
     }
   };
 
-  const activeTabLabel = tabs.find((tab) => tab.id === activeTab)?.label ?? '';
+  const activeTabLabel = tabs.find((tab) => tab.id === effectiveActiveTab)?.label ?? '';
 
   const renderTabContent = () => (
     <>
-      {activeTab === 'appearance' && <AppearanceSettings />}
-      {activeTab === 'email' && <EmailSettings />}
-      {activeTab === 'notifications' && <NotificationSettings />}
-      {activeTab === 'account' && <AccountSettings />}
-      {activeTab === 'security' && <AccountSecuritySettings />}
-      {activeTab === 'identities' && <IdentitySettings />}
-      {activeTab === 'encryption' && <SmimeSettings />}
-      {activeTab === 'vacation' && <VacationSettings />}
-      {activeTab === 'calendar' && <><CalendarSettings /><div className="mt-8"><CalendarManagementSettings /></div></>}
-      {activeTab === 'contacts' && <><ContactsSettings /><div className="mt-8"><AddressBookManagementSettings /></div></>}
-      {activeTab === 'filters' && <FilterSettings />}
-      {activeTab === 'templates' && <TemplateSettings />}
-      {activeTab === 'folders' && <FolderSettings />}
-      {activeTab === 'keywords' && <KeywordSettings />}
-      {activeTab === 'files' && <FilesSettingsComponent />}
-      {activeTab === 'sidebar_apps' && <SidebarAppsSettings />}
-      {activeTab === 'themes' && <ThemesSettings />}
-      {activeTab === 'plugins' && <PluginsSettings />}
-      {activeTab === 'advanced' && <AdvancedSettings />}
+      {effectiveActiveTab === 'account' && <AccountSettings />}
+      {effectiveActiveTab === 'language' && <LanguageSettings />}
+      {effectiveActiveTab === 'notifications' && <NotificationSettings />}
+      {effectiveActiveTab === 'appearance' && <AppearanceSettings />}
+      {effectiveActiveTab === 'layout' && <LayoutSettings />}
+      {effectiveActiveTab === 'reading' && <ReadingSettings />}
+      {effectiveActiveTab === 'composing' && <ComposingSettings />}
+      {effectiveActiveTab === 'identities' && <IdentitySettings />}
+      {effectiveActiveTab === 'vacation' && <VacationSettings />}
+      {effectiveActiveTab === 'filters' && <FilterSettings />}
+      {effectiveActiveTab === 'templates' && <TemplateSettings />}
+      {effectiveActiveTab === 'folders' && <FolderSettings />}
+      {effectiveActiveTab === 'keywords' && <KeywordSettings />}
+      {effectiveActiveTab === 'security' && <AccountSecuritySettings />}
+      {effectiveActiveTab === 'encryption' && <SmimeSettings />}
+      {effectiveActiveTab === 'content_senders' && <ContentSendersSettings />}
+      {effectiveActiveTab === 'calendar' && <><CalendarSettings /><div className="mt-8"><CalendarManagementSettings /></div></>}
+      {effectiveActiveTab === 'contacts' && <><ContactsSettings /><div className="mt-8"><AddressBookManagementSettings /></div></>}
+      {effectiveActiveTab === 'files' && <FilesSettingsComponent />}
+      {effectiveActiveTab === 'sidebar_apps' && <SidebarAppsSettings />}
+      {effectiveActiveTab === 'about_data' && <AboutDataSettings />}
+      {effectiveActiveTab === 'themes' && <ThemesSettings />}
+      {effectiveActiveTab === 'plugins' && <PluginsSettings />}
+      {effectiveActiveTab === 'debug' && <DebugSettings />}
     </>
   );
 
   // Mobile layout
   if (!isDesktop) {
-    // Mobile: show content view
     if (mobileShowContent) {
       return (
         <div className="flex flex-col h-dvh bg-background">
-          {/* Mobile content header */}
           <div className="flex items-center gap-2 px-4 h-14 border-b border-border bg-background shrink-0">
             <Button
               variant="ghost"
@@ -244,14 +329,12 @@ export default function SettingsPage() {
             <h1 className="font-semibold text-lg truncate">{activeTabLabel}</h1>
           </div>
 
-          {/* Content */}
           <div className="flex-1 overflow-y-auto p-4">
             <div className="bg-card border border-border rounded-lg p-4">
               {renderTabContent()}
             </div>
           </div>
 
-          {/* Bottom Navigation */}
           <NavigationRail
             orientation="horizontal"
             onManageApps={handleManageApps}
@@ -264,10 +347,8 @@ export default function SettingsPage() {
       );
     }
 
-    // Mobile: show tab list
     return (
       <div className="flex flex-col h-dvh bg-background">
-        {/* Mobile header */}
         <div className="flex items-center gap-2 px-4 h-14 border-b border-border bg-background shrink-0">
           <Button
             variant="ghost"
@@ -283,7 +364,6 @@ export default function SettingsPage() {
           </div>
         </div>
 
-        {/* Tab list */}
         <div className="flex-1 overflow-y-auto">
           <div className="py-2">
             {groupedTabs.map((group, groupIndex) => (
@@ -319,7 +399,6 @@ export default function SettingsPage() {
             ))}
           </div>
 
-          {/* Logout */}
           <div className="border-t border-border px-5 py-3">
             <button
               onClick={logout}
@@ -331,7 +410,6 @@ export default function SettingsPage() {
           </div>
         </div>
 
-        {/* Bottom Navigation */}
         <NavigationRail
           orientation="horizontal"
           onManageApps={handleManageApps}
@@ -347,7 +425,6 @@ export default function SettingsPage() {
   // Desktop layout
   return (
     <div className="flex h-dvh bg-background">
-      {/* Navigation Rail */}
       <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
         <NavigationRail
           collapsed
@@ -366,7 +443,6 @@ export default function SettingsPage() {
       )}
       {!inlineApp && (
       <>
-      {/* Settings Sidebar */}
       <div
         className={cn(
           "border-r border-border bg-secondary flex flex-col",
@@ -374,7 +450,6 @@ export default function SettingsPage() {
         )}
         style={{ width: `${settingsSidebarWidth}px` }}
       >
-        {/* Header */}
         <div className="p-4 border-b border-border">
           <Button
             variant="ghost"
@@ -387,7 +462,6 @@ export default function SettingsPage() {
           </Button>
         </div>
 
-        {/* Tabs */}
         <div className="flex-1 overflow-y-auto py-2" data-tour="settings-tabs">
           <div className="px-2 space-y-0.5">
             {groupedTabs.map((group, groupIndex) => (
@@ -406,14 +480,14 @@ export default function SettingsPage() {
                       onClick={() => setActiveTab(tab.id)}
                       className={cn(
                         'w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
-                        activeTab === tab.id
+                        effectiveActiveTab === tab.id
                           ? 'bg-accent text-accent-foreground font-medium'
                           : 'hover:bg-muted text-foreground'
                       )}
                     >
                       <Icon className={cn(
                         'w-4 h-4 shrink-0',
-                        activeTab === tab.id ? 'text-accent-foreground' : 'text-muted-foreground'
+                        effectiveActiveTab === tab.id ? 'text-accent-foreground' : 'text-muted-foreground'
                       )} />
                       {tab.label}
                       {tab.experimental && (
@@ -430,7 +504,6 @@ export default function SettingsPage() {
         </div>
       </div>
 
-      {/* Sidebar resize handle */}
       <ResizeHandle
         onResizeStart={() => { dragStartWidth.current = settingsSidebarWidth; setIsResizing(true); }}
         onResize={(delta) => setSettingsSidebarWidth(Math.max(180, Math.min(400, dragStartWidth.current + delta)))}
@@ -441,10 +514,8 @@ export default function SettingsPage() {
         onDoubleClick={() => { setSettingsSidebarWidth(256); localStorage.setItem('settings-sidebar-width', '256'); }}
       />
 
-      {/* Settings Content */}
       <div className="flex-1 overflow-y-auto">
         <div className="max-w-3xl mx-auto p-8">
-          {/* Page Header */}
           <div className="mb-6">
             <div className="flex items-center gap-2.5 mb-2">
               <SettingsIcon className="w-6 h-6 text-muted-foreground" />
@@ -452,7 +523,6 @@ export default function SettingsPage() {
             </div>
           </div>
 
-          {/* Active Tab Content */}
           <div className="bg-card border border-border rounded-lg p-6">
             {renderTabContent()}
           </div>

app/admin/auth/page.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import { useEffect, useState } from 'react';
-import { Save, Loader2, RotateCcw } from 'lucide-react';
+import { Save, Loader2, RotateCcw, Sparkles } from 'lucide-react';
 import { apiFetch } from '@/lib/browser-navigation';
 
 interface ConfigEntry {
@@ -69,6 +69,58 @@ export default function AdminAuthPage() {
     }
   }
 
+  const [setupRunning, setSetupRunning] = useState(false);
+  const [setupOpen, setSetupOpen] = useState(false);
+  const [setupOrigin, setSetupOrigin] = useState('');
+  const [setupIssuer, setSetupIssuer] = useState('');
+  const [setupOauthOnly, setSetupOauthOnly] = useState(false);
+
+  function openSetupDialog() {
+    if (typeof window === 'undefined') return;
+    const origin = window.location.origin;
+    const jmapUrl = (currentValue('jmapServerUrl') as string | undefined)?.replace(/\/+$/, '') || '';
+    setSetupOrigin(origin);
+    setSetupIssuer(jmapUrl || origin);
+    setSetupOauthOnly(currentValue('oauthOnly') === true);
+    setSetupOpen(true);
+  }
+
+  async function handleAutoSetup() {
+    setSetupRunning(true);
+    setMessage(null);
+    try {
+      const res = await apiFetch('/api/admin/oauth/setup', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          origin: setupOrigin.trim().replace(/\/+$/, ''),
+          issuerUrl: setupIssuer.trim().replace(/\/+$/, ''),
+          oauthOnly: setupOauthOnly,
+        }),
+      });
+      const data = await res.json();
+      if (res.ok) {
+        setMessage({
+          type: 'success',
+          text: `OAuth client ${data.action} on Stalwart (${data.issuerUrl}). ${data.redirectUriCount} redirect URI(s) registered for ${data.origin}.`,
+        });
+        setEdits({});
+        setSetupOpen(false);
+        await fetchConfig();
+      } else {
+        const detail = data.detail ? ` (${typeof data.detail === 'string' ? data.detail : JSON.stringify(data.detail).slice(0, 200)})` : '';
+        setMessage({ type: 'error', text: (data.error || 'Setup failed') + detail });
+      }
+    } catch (err) {
+      setMessage({ type: 'error', text: err instanceof Error ? err.message : 'Setup failed' });
+    } finally {
+      setSetupRunning(false);
+    }
+  }
+
+  const setupOriginValid = /^https?:\/\/[^/]+$/.test(setupOrigin.trim().replace(/\/+$/, ''));
+  const setupIssuerValid = /^https?:\/\/[^/]+$/.test(setupIssuer.trim().replace(/\/+$/, ''));
+
   const hasEdits = Object.keys(edits).length > 0;
 
   if (loading) {
@@ -100,6 +152,119 @@ export default function AdminAuthPage() {
         </div>
       )}
 
+      {/* Auto-setup */}
+      <div className="rounded-lg border border-primary/30 bg-primary/5 p-4">
+        <div className="flex items-start justify-between gap-4">
+          <div className="min-w-0">
+            <div className="flex items-center gap-2">
+              <Sparkles className="w-4 h-4 text-primary shrink-0" />
+              <h3 className="text-sm font-medium text-foreground">Auto-configure OAuth (Stalwart)</h3>
+            </div>
+            <p className="text-xs text-muted-foreground mt-1">
+              Registers an OAuth client on the connected Stalwart server, generates a client secret, and saves the settings here.
+              Requires your Stalwart account to have admin permissions.
+            </p>
+          </div>
+          <button
+            onClick={openSetupDialog}
+            disabled={setupRunning}
+            className="shrink-0 inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+          >
+            {setupRunning ? <Loader2 className="w-4 h-4 animate-spin" /> : <Sparkles className="w-4 h-4" />}
+            {setupRunning ? 'Configuring…' : 'Set up automagically'}
+          </button>
+        </div>
+      </div>
+
+      {/* Auto-setup dialog */}
+      {setupOpen && (
+        <div
+          className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-sm p-4"
+          role="dialog"
+          aria-modal="true"
+          aria-labelledby="oauth-setup-title"
+          onClick={(e) => { if (e.target === e.currentTarget && !setupRunning) setSetupOpen(false); }}
+        >
+          <div className="w-full max-w-md rounded-lg border border-border bg-background shadow-xl">
+            <div className="px-5 py-4 border-b border-border">
+              <h3 id="oauth-setup-title" className="text-base font-medium text-foreground">Auto-configure OAuth</h3>
+              <p className="text-xs text-muted-foreground mt-1">
+                Verify the URLs below before continuing. The webmail and Stalwart can live on different domains.
+              </p>
+            </div>
+            <div className="px-5 py-4 space-y-4">
+              <div>
+                <label htmlFor="setup-origin" className="block text-xs font-medium text-foreground mb-1">
+                  Webmail origin
+                </label>
+                <input
+                  id="setup-origin"
+                  type="url"
+                  value={setupOrigin}
+                  onChange={(e) => setSetupOrigin(e.target.value)}
+                  disabled={setupRunning}
+                  placeholder="https://webmail.example.com"
+                  className="w-full h-9 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+                <p className="text-[11px] text-muted-foreground mt-1">
+                  Used to register redirect URIs (one per locale: <code>{setupOrigin.trim().replace(/\/+$/, '') || 'https://…'}/&lt;locale&gt;/auth/callback</code>) on Stalwart.
+                </p>
+                {!setupOriginValid && setupOrigin.length > 0 && (
+                  <p className="text-[11px] text-destructive mt-1">Must be like https://host with no path.</p>
+                )}
+              </div>
+              <div>
+                <label htmlFor="setup-issuer" className="block text-xs font-medium text-foreground mb-1">
+                  Stalwart issuer URL
+                </label>
+                <input
+                  id="setup-issuer"
+                  type="url"
+                  value={setupIssuer}
+                  onChange={(e) => setSetupIssuer(e.target.value)}
+                  disabled={setupRunning}
+                  placeholder="https://mail.example.com"
+                  className="w-full h-9 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+                <p className="text-[11px] text-muted-foreground mt-1">
+                  Where Stalwart serves <code>/.well-known/oauth-authorization-server</code>. Saved as <code>OAUTH_ISSUER_URL</code>. Pre-filled from your JMAP server URL.
+                </p>
+                {!setupIssuerValid && setupIssuer.length > 0 && (
+                  <p className="text-[11px] text-destructive mt-1">Must be like https://host with no path.</p>
+                )}
+              </div>
+              <label className="inline-flex items-center gap-2 text-xs text-foreground select-none cursor-pointer">
+                <input
+                  type="checkbox"
+                  checked={setupOauthOnly}
+                  onChange={(e) => setSetupOauthOnly(e.target.checked)}
+                  className="h-3.5 w-3.5 rounded border-input"
+                  disabled={setupRunning}
+                />
+                Also enable “OAuth only” (hide password login)
+              </label>
+            </div>
+            <div className="px-5 py-3 border-t border-border flex items-center justify-end gap-2 bg-muted/30 rounded-b-lg">
+              <button
+                onClick={() => setSetupOpen(false)}
+                disabled={setupRunning}
+                className="h-9 px-3 rounded-md border border-input bg-background text-sm text-foreground hover:bg-muted disabled:opacity-50 transition-colors"
+              >
+                Cancel
+              </button>
+              <button
+                onClick={handleAutoSetup}
+                disabled={setupRunning || !setupOriginValid || !setupIssuerValid}
+                className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+              >
+                {setupRunning ? <Loader2 className="w-4 h-4 animate-spin" /> : <Sparkles className="w-4 h-4" />}
+                {setupRunning ? 'Configuring…' : 'Configure'}
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+
       {/* OAuth */}
       <Section title="OAuth / OpenID Connect">
         <Toggle label="OAuth Enabled" configKey="oauthEnabled" value={currentValue('oauthEnabled') as boolean} source={config.oauthEnabled?.source} onChange={handleChange} onRevert={handleRevert} />

app/admin/layout.tsx

@@ -14,6 +14,7 @@ import {
   KeyRound,
   Puzzle,
   SwatchBook,
+  Activity,
   Mail,
   Calendar,
   BookUser,
@@ -56,6 +57,7 @@ const NAV_GROUPS = [
   {
     label: 'System',
     items: [
+      { href: '/admin/telemetry', label: 'Telemetry', icon: Activity },
       { href: '/admin/logs', label: 'Audit Log', icon: ScrollText },
     ],
   },
@@ -65,6 +67,7 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
   const router = useRouter();
   const pathname = usePathname();
   const [authenticated, setAuthenticated] = useState<boolean | null>(null);
+  const [authError, setAuthError] = useState<string | null>(null);
   const [isStalwartAdmin, setIsStalwartAdmin] = useState(false);
   const { appLogoLightUrl, appLogoDarkUrl, loginLogoLightUrl, loginLogoDarkUrl } = useConfig();
   const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
@@ -73,54 +76,59 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
     : (appLogoLightUrl || appLogoDarkUrl || loginLogoLightUrl);
 
   useEffect(() => {
-    if (pathname !== '/admin/login') {
-      checkAuth();
-    }
-  // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [pathname]);
+    if (pathname === '/admin/login') return;
+    let cancelled = false;
 
-  function getJmapHeaders(): Record<string, string> {
-    return getActiveAccountSlotHeaders();
-  }
+    async function checkAuth() {
+      try {
+        const jmapHeaders = getActiveAccountSlotHeaders();
+        const res = await apiFetch('/api/admin/auth', { headers: jmapHeaders });
+        const data = await res.json();
+        if (cancelled) return;
 
-  async function checkAuth() {
-    try {
-      const jmapHeaders = getJmapHeaders();
-      const res = await apiFetch('/api/admin/auth', { headers: jmapHeaders });
-      const data = await res.json();
+        const stalwartAdmin = data.stalwartAdmin === true;
+        setIsStalwartAdmin(stalwartAdmin);
 
-      const stalwartAdmin = data.stalwartAdmin === true;
-      setIsStalwartAdmin(stalwartAdmin);
+        // If neither password-based admin nor Stalwart admin, redirect away
+        if (!data.enabled && !stalwartAdmin) {
+          router.replace('/');
+          return;
+        }
 
-      // If neither password-based admin nor Stalwart admin, redirect away
-      if (!data.enabled && !stalwartAdmin) {
-        router.replace('/');
-        return;
-      }
-
-      if (data.authenticated) {
-        setAuthenticated(true);
-        return;
-      }
-
-      // If Stalwart admin but not yet authenticated, auto-login
-      if (stalwartAdmin) {
-        const loginRes = await apiFetch('/api/admin/auth', {
-          method: 'POST',
-          headers: { 'Content-Type': 'application/json', ...jmapHeaders },
-          body: JSON.stringify({ stalwartAuth: true }),
-        });
-        if (loginRes.ok) {
+        if (data.authenticated) {
           setAuthenticated(true);
           return;
         }
-      }
 
-      router.replace('/admin/login');
-    } catch {
-      router.replace('/admin/login');
+        // If Stalwart admin but not yet authenticated, auto-login
+        if (stalwartAdmin) {
+          const loginRes = await apiFetch('/api/admin/auth', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json', ...jmapHeaders },
+            body: JSON.stringify({ stalwartAuth: true }),
+          });
+          if (cancelled) return;
+          if (loginRes.ok) {
+            setAuthenticated(true);
+            return;
+          }
+          const body = await loginRes.json().catch(() => ({}));
+          setAuthError(body?.error || `Admin auto-login failed (HTTP ${loginRes.status})`);
+          setAuthenticated(false);
+          return;
+        }
+
+        router.replace('/admin/login');
+      } catch (err) {
+        if (cancelled) return;
+        setAuthError(err instanceof Error ? err.message : 'Network error during admin check');
+        setAuthenticated(false);
+      }
     }
-  }
+
+    checkAuth();
+    return () => { cancelled = true; };
+  }, [pathname, router]);
 
   async function handleLogout() {
     await apiFetch('/api/admin/auth', { method: 'DELETE' });
@@ -132,14 +140,6 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
     return <>{children}</>;
   }
 
-  if (authenticated === null) {
-    return (
-      <div className="min-h-screen flex items-center justify-center bg-background">
-        <div className="animate-pulse text-muted-foreground text-sm">Loading...</div>
-      </div>
-    );
-  }
-
   return (
     <div className="min-h-screen flex bg-background">
       {/* Slim webmail nav rail */}
@@ -269,7 +269,18 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
       {/* Main content */}
       <main className="flex-1 overflow-auto">
         <div className="max-w-4xl mx-auto p-6">
-          {children}
+          {authError ? (
+            <div className="rounded-lg border border-destructive/40 bg-destructive/10 p-4 text-sm text-destructive">
+              <p className="font-medium">Admin authentication failed</p>
+              <p className="mt-1 text-destructive/80">{authError}</p>
+            </div>
+          ) : authenticated === null ? (
+            <div className="py-12 text-center text-sm text-muted-foreground animate-pulse">
+              Loading admin panel…
+            </div>
+          ) : authenticated ? (
+            children
+          ) : null}
         </div>
       </main>
     </div>

app/admin/marketplace/[slug]/page.tsx

@@ -0,0 +1,542 @@
+'use client';
+
+import { useEffect, useState, useCallback } from 'react';
+import { useParams } from 'next/navigation';
+import Link from 'next/link';
+import {
+  ArrowLeft,
+  Download,
+  Loader2,
+  Puzzle,
+  SwatchBook,
+  Star,
+  Trash2,
+  Check,
+  Settings as SettingsIcon,
+  ExternalLink,
+  Shield,
+  AlertTriangle,
+  FileCode,
+  ChevronDown,
+  ChevronUp,
+} from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+
+interface PreviewData {
+  extension: {
+    slug: string;
+    name: string;
+    type: 'plugin' | 'theme';
+    pluginType: string | null;
+    description: string;
+    longDescription: string | null;
+    tags: string[];
+    permissions: string[];
+    totalDownloads: number;
+    featured: boolean;
+    githubRepo: string | null;
+    license: string | null;
+    minAppVersion: string | null;
+    author: {
+      displayName: string;
+      githubLogin: string;
+      avatarUrl: string | null;
+      verified?: boolean;
+    } | null;
+    latestVersion: string | null;
+    versions: Array<{
+      version: string;
+      changelog: string | null;
+      bundleSize: number;
+      minAppVersion: string | null;
+      publishedAt: string | null;
+      permissions: string[];
+    }>;
+    screenshots: Array<{ url: string; altText: string | null }>;
+    themePreviews: Array<{
+      variant: 'light' | 'dark';
+      previewPath: string;
+      colors: Record<string, string> | null;
+    }>;
+    createdAt: string | null;
+    updatedAt: string | null;
+  };
+  bundle: {
+    manifest: Record<string, unknown> | null;
+    source: { name: string; content: string; truncated: boolean } | null;
+    size: number;
+    error: string | null;
+  };
+  installed: boolean;
+}
+
+const RISKY_PERMISSIONS = new Set([
+  'mail:write',
+  'mail:delete',
+  'storage:write',
+  'network',
+  'admin',
+]);
+
+export default function MarketplacePreviewPage() {
+  const params = useParams();
+  const slug = params.slug as string;
+
+  const [data, setData] = useState<PreviewData | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [installing, setInstalling] = useState(false);
+  const [uninstalling, setUninstalling] = useState(false);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const [showSource, setShowSource] = useState(false);
+  const [showManifest, setShowManifest] = useState(false);
+
+  const fetchPreview = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      const res = await apiFetch(`/api/admin/marketplace/${encodeURIComponent(slug)}`);
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}));
+        setError(body.error || 'Failed to load preview');
+        return;
+      }
+      setData(await res.json());
+    } catch {
+      setError('Failed to connect to extension directory');
+    } finally {
+      setLoading(false);
+    }
+  }, [slug]);
+
+  useEffect(() => { fetchPreview(); }, [fetchPreview]);
+
+  async function handleInstall() {
+    if (!data) return;
+    setInstalling(true);
+    setMessage(null);
+    try {
+      const res = await apiFetch('/api/admin/marketplace', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          slug: data.extension.slug,
+          version: data.extension.latestVersion || '1.0.0',
+          type: data.extension.type,
+        }),
+      });
+      const body = await res.json();
+      if (res.ok) {
+        const warnings = body.warnings?.length ? ` (${body.warnings.length} warning(s))` : '';
+        setMessage({ type: 'success', text: `"${data.extension.name}" installed${warnings}` });
+        setData(prev => prev ? { ...prev, installed: true } : prev);
+      } else {
+        setMessage({ type: 'error', text: body.error || 'Installation failed' });
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Installation failed - network error' });
+    } finally {
+      setInstalling(false);
+    }
+  }
+
+  async function handleUninstall() {
+    if (!data) return;
+    if (!confirm(`Remove "${data.extension.name}"? This cannot be undone.`)) return;
+
+    setUninstalling(true);
+    setMessage(null);
+    try {
+      const endpoint = data.extension.type === 'theme'
+        ? '/api/admin/themes'
+        : '/api/admin/plugins';
+      const res = await apiFetch(endpoint, {
+        method: 'DELETE',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ id: data.extension.slug }),
+      });
+      const body = await res.json().catch(() => ({}));
+      if (res.ok) {
+        setMessage({ type: 'success', text: `"${data.extension.name}" removed` });
+        setData(prev => prev ? { ...prev, installed: false } : prev);
+      } else {
+        setMessage({ type: 'error', text: body.error || 'Uninstall failed' });
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Uninstall failed - network error' });
+    } finally {
+      setUninstalling(false);
+    }
+  }
+
+  if (loading) {
+    return (
+      <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">
+        <Loader2 className="w-4 h-4 animate-spin mr-2" />
+        Loading...
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="space-y-4">
+        <Link
+          href="/admin/marketplace"
+          className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+        >
+          <ArrowLeft className="w-4 h-4" /> Back to Marketplace
+        </Link>
+        <p className="text-sm text-destructive">{error || 'Extension not found'}</p>
+      </div>
+    );
+  }
+
+  const ext = data.extension;
+  const bundle = data.bundle;
+  const isPlugin = ext.type === 'plugin';
+  const manifestPerms = (bundle.manifest?.permissions as string[] | undefined) || ext.permissions || [];
+  const frameOrigins = (bundle.manifest?.frameOrigins as string[] | undefined) || [];
+  const settingsSchema = bundle.manifest?.settingsSchema as Record<string, { type: string; label: string; description?: string; default?: unknown }> | undefined;
+
+  return (
+    <div className="space-y-6 max-w-4xl">
+      {/* Back link */}
+      <Link
+        href="/admin/marketplace"
+        className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+      >
+        <ArrowLeft className="w-4 h-4" /> Back to Marketplace
+      </Link>
+
+      {/* Header */}
+      <div className="flex items-start gap-4">
+        <div className="w-14 h-14 rounded-lg bg-muted flex items-center justify-center shrink-0">
+          {isPlugin ? (
+            <Puzzle className="w-7 h-7 text-muted-foreground" />
+          ) : (
+            <SwatchBook className="w-7 h-7 text-muted-foreground" />
+          )}
+        </div>
+        <div className="flex-1 min-w-0">
+          <div className="flex items-center gap-2">
+            <h1 className="text-2xl font-semibold text-foreground truncate">{ext.name}</h1>
+            {ext.featured && <Star className="w-4 h-4 text-warning fill-warning shrink-0" />}
+            {data.installed && (
+              <span className="inline-flex items-center gap-1 text-xs px-2 py-0.5 rounded-md bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 font-medium">
+                <Check className="w-3 h-3" /> Installed
+              </span>
+            )}
+          </div>
+          <div className="flex items-center gap-2 mt-1 text-sm text-muted-foreground flex-wrap">
+            <span className={`text-[10px] px-1.5 py-0.5 rounded font-medium ${
+              isPlugin
+                ? 'bg-blue-100 text-blue-700 dark:bg-blue-950/30 dark:text-blue-400'
+                : 'bg-purple-100 text-purple-700 dark:bg-purple-950/30 dark:text-purple-400'
+            }`}>
+              {isPlugin ? (ext.pluginType || 'plugin') : 'theme'}
+            </span>
+            {ext.author && (
+              <span>by {ext.author.displayName}</span>
+            )}
+            {ext.latestVersion && <span>v{ext.latestVersion}</span>}
+            {ext.license && <span>{ext.license}</span>}
+            <span className="inline-flex items-center gap-1">
+              <Download className="w-3 h-3" />
+              {ext.totalDownloads.toLocaleString()}
+            </span>
+          </div>
+        </div>
+
+        {/* Action buttons */}
+        <div className="flex items-center gap-2 shrink-0">
+          {data.installed ? (
+            <>
+              <Link
+                href={isPlugin ? `/admin/plugins/${ext.slug}` : '/admin/themes'}
+                className="inline-flex items-center gap-1.5 h-9 px-3 rounded-md border border-border text-sm font-medium text-foreground hover:bg-muted transition-colors"
+              >
+                <SettingsIcon className="w-4 h-4" />
+                Manage
+              </Link>
+              <button
+                onClick={handleUninstall}
+                disabled={uninstalling}
+                className="inline-flex items-center gap-1.5 h-9 px-3 rounded-md bg-destructive text-destructive-foreground text-sm font-medium hover:bg-destructive/90 disabled:opacity-50 transition-colors"
+              >
+                {uninstalling ? <Loader2 className="w-4 h-4 animate-spin" /> : <Trash2 className="w-4 h-4" />}
+                Uninstall
+              </button>
+            </>
+          ) : (
+            <button
+              onClick={handleInstall}
+              disabled={installing || !!bundle.error}
+              className="inline-flex items-center gap-1.5 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-colors"
+            >
+              {installing ? <Loader2 className="w-4 h-4 animate-spin" /> : <Download className="w-4 h-4" />}
+              Install
+            </button>
+          )}
+        </div>
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      {bundle.error && (
+        <div className="flex items-start gap-2 text-sm rounded-md px-3 py-2 bg-amber-50 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300">
+          <AlertTriangle className="w-4 h-4 shrink-0 mt-0.5" />
+          <div>
+            <p className="font-medium">Could not preview bundle</p>
+            <p className="text-xs mt-0.5 opacity-90">{bundle.error}</p>
+          </div>
+        </div>
+      )}
+
+      {/* Description */}
+      <section className="border border-border rounded-lg p-4">
+        <h2 className="text-sm font-medium text-foreground">About</h2>
+        <p className="text-sm text-muted-foreground mt-2">{ext.description}</p>
+        {ext.longDescription && ext.longDescription !== ext.description && (
+          <p className="text-sm text-muted-foreground mt-3 whitespace-pre-wrap">{ext.longDescription}</p>
+        )}
+        {ext.tags.length > 0 && (
+          <div className="flex flex-wrap gap-1 mt-3">
+            {ext.tags.map(tag => (
+              <span key={tag} className="text-[10px] px-1.5 py-0.5 rounded bg-muted text-muted-foreground">
+                {tag}
+              </span>
+            ))}
+          </div>
+        )}
+        <div className="flex items-center gap-3 text-xs text-muted-foreground mt-4 pt-3 border-t border-border flex-wrap">
+          {ext.minAppVersion && <span>Requires app v{ext.minAppVersion}+</span>}
+          {bundle.size > 0 && <span>Bundle: {(bundle.size / 1024).toFixed(1)} KB</span>}
+          {ext.githubRepo && (
+            <a
+              href={`https://github.com/${ext.githubRepo}`}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="inline-flex items-center gap-1 hover:text-foreground"
+            >
+              <ExternalLink className="w-3 h-3" />
+              {ext.githubRepo}
+            </a>
+          )}
+        </div>
+      </section>
+
+      {/* Screenshots */}
+      {ext.screenshots.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Screenshots</h2>
+          <div className="grid grid-cols-1 sm:grid-cols-2 gap-3 mt-3">
+            {ext.screenshots.map((s, i) => (
+              <img
+                key={i}
+                src={s.url}
+                alt={s.altText || `Screenshot ${i + 1}`}
+                className="w-full rounded-md border border-border bg-muted"
+                loading="lazy"
+              />
+            ))}
+          </div>
+        </section>
+      )}
+
+      {/* Theme color preview */}
+      {!isPlugin && ext.themePreviews.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Theme preview</h2>
+          <div className="grid grid-cols-1 sm:grid-cols-2 gap-3 mt-3">
+            {ext.themePreviews.map(preview => (
+              <ThemeColorSwatch key={preview.variant} preview={preview} />
+            ))}
+          </div>
+        </section>
+      )}
+
+      {/* Permissions */}
+      {isPlugin && (
+        <section className="border border-border rounded-lg p-4">
+          <div className="flex items-center gap-2">
+            <Shield className="w-4 h-4 text-muted-foreground" />
+            <h2 className="text-sm font-medium text-foreground">Permissions</h2>
+          </div>
+          {manifestPerms.length === 0 ? (
+            <p className="text-sm text-muted-foreground mt-2">This plugin requests no permissions.</p>
+          ) : (
+            <ul className="mt-3 space-y-1.5">
+              {manifestPerms.map(perm => {
+                const risky = RISKY_PERMISSIONS.has(perm);
+                return (
+                  <li
+                    key={perm}
+                    className={`flex items-center gap-2 text-sm rounded-md px-2 py-1 ${
+                      risky
+                        ? 'bg-amber-50 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300'
+                        : 'bg-muted/50 text-foreground'
+                    }`}
+                  >
+                    {risky && <AlertTriangle className="w-3.5 h-3.5 shrink-0" />}
+                    <code className="font-mono text-xs">{perm}</code>
+                  </li>
+                );
+              })}
+            </ul>
+          )}
+          {frameOrigins.length > 0 && (
+            <div className="mt-4 pt-3 border-t border-border">
+              <h3 className="text-xs font-medium text-foreground">Iframe origins</h3>
+              <p className="text-xs text-muted-foreground mt-0.5">
+                The plugin will be allowed to embed content from these origins.
+              </p>
+              <ul className="mt-2 space-y-1">
+                {frameOrigins.map(origin => (
+                  <li key={origin} className="text-xs font-mono text-foreground bg-muted/50 px-2 py-1 rounded">
+                    {origin}
+                  </li>
+                ))}
+              </ul>
+            </div>
+          )}
+        </section>
+      )}
+
+      {/* Settings schema preview */}
+      {isPlugin && settingsSchema && Object.keys(settingsSchema).length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">User settings</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Settings users will be able to configure after install.</p>
+          <ul className="mt-3 divide-y divide-border">
+            {Object.entries(settingsSchema).map(([key, field]) => (
+              <li key={key} className="py-2">
+                <div className="flex items-center gap-2">
+                  <code className="text-xs font-mono text-foreground">{key}</code>
+                  <span className="text-[10px] px-1.5 py-0.5 rounded bg-muted text-muted-foreground">{field.type}</span>
+                </div>
+                <div className="text-sm text-foreground mt-0.5">{field.label}</div>
+                {field.description && (
+                  <div className="text-xs text-muted-foreground mt-0.5">{field.description}</div>
+                )}
+              </li>
+            ))}
+          </ul>
+        </section>
+      )}
+
+      {/* Source / manifest disclosure */}
+      {bundle.manifest && (
+        <section className="border border-border rounded-lg">
+          <button
+            onClick={() => setShowManifest(v => !v)}
+            className="w-full flex items-center justify-between gap-2 px-4 py-3 text-left hover:bg-muted/30 transition-colors"
+          >
+            <div className="flex items-center gap-2">
+              <FileCode className="w-4 h-4 text-muted-foreground" />
+              <h2 className="text-sm font-medium text-foreground">manifest.json</h2>
+            </div>
+            {showManifest ? <ChevronUp className="w-4 h-4 text-muted-foreground" /> : <ChevronDown className="w-4 h-4 text-muted-foreground" />}
+          </button>
+          {showManifest && (
+            <pre className="px-4 pb-4 text-xs font-mono overflow-x-auto text-foreground whitespace-pre">
+              {JSON.stringify(bundle.manifest, null, 2)}
+            </pre>
+          )}
+        </section>
+      )}
+
+      {bundle.source && (
+        <section className="border border-border rounded-lg">
+          <button
+            onClick={() => setShowSource(v => !v)}
+            className="w-full flex items-center justify-between gap-2 px-4 py-3 text-left hover:bg-muted/30 transition-colors"
+          >
+            <div className="flex items-center gap-2">
+              <FileCode className="w-4 h-4 text-muted-foreground" />
+              <h2 className="text-sm font-medium text-foreground">{bundle.source.name}</h2>
+              {bundle.source.truncated && (
+                <span className="text-[10px] px-1.5 py-0.5 rounded bg-amber-100 text-amber-700 dark:bg-amber-950/30 dark:text-amber-400">truncated</span>
+              )}
+            </div>
+            {showSource ? <ChevronUp className="w-4 h-4 text-muted-foreground" /> : <ChevronDown className="w-4 h-4 text-muted-foreground" />}
+          </button>
+          {showSource && (
+            <pre className="px-4 pb-4 text-xs font-mono overflow-x-auto text-foreground whitespace-pre max-h-[600px] overflow-y-auto">
+              {bundle.source.content}
+            </pre>
+          )}
+        </section>
+      )}
+
+      {/* Version history */}
+      {ext.versions.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Version history</h2>
+          <ul className="mt-3 divide-y divide-border">
+            {ext.versions.slice(0, 5).map(v => (
+              <li key={v.version} className="py-2 flex items-start justify-between gap-3">
+                <div className="min-w-0 flex-1">
+                  <div className="flex items-center gap-2">
+                    <code className="text-xs font-mono text-foreground">v{v.version}</code>
+                    {v.publishedAt && (
+                      <span className="text-xs text-muted-foreground">
+                        {new Date(v.publishedAt).toLocaleDateString()}
+                      </span>
+                    )}
+                  </div>
+                  {v.changelog && (
+                    <p className="text-xs text-muted-foreground mt-0.5 whitespace-pre-wrap">{v.changelog}</p>
+                  )}
+                </div>
+                <span className="text-xs text-muted-foreground shrink-0">
+                  {(v.bundleSize / 1024).toFixed(1)} KB
+                </span>
+              </li>
+            ))}
+          </ul>
+        </section>
+      )}
+    </div>
+  );
+}
+
+function ThemeColorSwatch({ preview }: { preview: { variant: 'light' | 'dark'; colors: Record<string, string> | null } }) {
+  const colors = preview.colors || {};
+  const bg = colors.background || (preview.variant === 'dark' ? '#0f0f10' : '#ffffff');
+  const fg = colors.foreground || (preview.variant === 'dark' ? '#fafafa' : '#0a0a0a');
+  const accent = colors.primary || colors.accent || '#7c5cff';
+  const muted = colors.muted || (preview.variant === 'dark' ? '#1a1a1c' : '#f5f5f5');
+  const border = colors.border || (preview.variant === 'dark' ? '#27272a' : '#e5e5e5');
+
+  return (
+    <div className="rounded-md border border-border overflow-hidden">
+      <div className="px-3 py-2 text-xs font-medium text-muted-foreground bg-muted/30 border-b border-border capitalize">
+        {preview.variant}
+      </div>
+      <div className="p-3 space-y-2" style={{ background: bg, color: fg }}>
+        <div className="flex items-center gap-2">
+          <span className="inline-block w-6 h-6 rounded" style={{ background: accent }} />
+          <span className="text-sm font-medium" style={{ color: fg }}>Sample text</span>
+        </div>
+        <div className="rounded p-2 text-xs" style={{ background: muted, border: `1px solid ${border}` }}>
+          <span style={{ color: fg }}>Card surface</span>
+        </div>
+        <div className="flex flex-wrap gap-1">
+          {Object.entries(colors).slice(0, 6).map(([key, value]) => (
+            <span
+              key={key}
+              title={`${key}: ${value}`}
+              className="inline-block w-4 h-4 rounded border"
+              style={{ background: value, borderColor: border }}
+            />
+          ))}
+        </div>
+      </div>
+    </div>
+  );
+}

app/admin/marketplace/page.tsx

@@ -1,7 +1,8 @@
 'use client';
 
 import { useEffect, useState, useCallback } from 'react';
-import { Search, Download, Check, Loader2, Store, Puzzle, SwatchBook, Star, Filter } from 'lucide-react';
+import Link from 'next/link';
+import { Search, Download, Check, Loader2, Store, Puzzle, SwatchBook, Star, Eye } from 'lucide-react';
 import { apiFetch } from '@/lib/browser-navigation';
 
 interface Extension {
@@ -262,10 +263,11 @@ function ExtensionCard({
   onInstall: () => void;
 }) {
   const isPlugin = extension.type === 'plugin';
+  const previewHref = `/admin/marketplace/${encodeURIComponent(extension.slug)}`;
 
   return (
-    <div className="border border-border rounded-lg overflow-hidden hover:border-ring/30 transition-colors">
-      <div className="p-4">
+    <div className="group relative border border-border rounded-lg overflow-hidden hover:border-ring/30 transition-colors">
+      <Link href={previewHref} className="block p-4 focus:outline-none focus-visible:ring-2 focus-visible:ring-ring/40 rounded-lg">
         {/* Header */}
         <div className="flex items-start gap-3">
           <div className="w-10 h-10 rounded-md bg-muted flex items-center justify-center shrink-0">
@@ -277,7 +279,9 @@ function ExtensionCard({
           </div>
           <div className="min-w-0 flex-1">
             <div className="flex items-center gap-1.5">
-              <span className="text-sm font-medium text-foreground truncate">{extension.name}</span>
+              <span className="text-sm font-medium text-foreground truncate group-hover:underline">
+                {extension.name}
+              </span>
               {extension.featured && (
                 <Star className="w-3.5 h-3.5 text-warning shrink-0 fill-warning" />
               )}
@@ -315,7 +319,7 @@ function ExtensionCard({
           </div>
         )}
 
-        {/* Footer */}
+        {/* Footer (download count + permissions) */}
         <div className="flex items-center justify-between mt-4 pt-3 border-t border-border">
           <div className="flex items-center gap-3 text-xs text-muted-foreground">
             <span className="flex items-center gap-1">
@@ -328,27 +332,34 @@ function ExtensionCard({
               </span>
             )}
           </div>
-
-          {extension.installed ? (
-            <span className="inline-flex items-center gap-1 h-7 px-2.5 rounded-md bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 text-xs font-medium">
-              <Check className="w-3 h-3" />
-              Installed
-            </span>
-          ) : (
-            <button
-              onClick={onInstall}
-              disabled={installing}
-              className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-primary text-primary-foreground text-xs font-medium hover:bg-primary/90 disabled:opacity-50 transition-colors"
-            >
-              {installing ? (
-                <Loader2 className="w-3 h-3 animate-spin" />
-              ) : (
-                <Download className="w-3 h-3" />
-              )}
-              Install
-            </button>
-          )}
+          <span className="inline-flex items-center gap-1 text-xs text-muted-foreground group-hover:text-foreground">
+            <Eye className="w-3 h-3" />
+            Preview
+          </span>
         </div>
+      </Link>
+
+      {/* Quick install button (sits over the link, stops navigation) */}
+      <div className="px-4 pb-4 -mt-1">
+        {extension.installed ? (
+          <span className="inline-flex items-center gap-1 h-7 px-2.5 rounded-md bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 text-xs font-medium">
+            <Check className="w-3 h-3" />
+            Installed
+          </span>
+        ) : (
+          <button
+            onClick={(e) => { e.preventDefault(); e.stopPropagation(); onInstall(); }}
+            disabled={installing}
+            className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-primary text-primary-foreground text-xs font-medium hover:bg-primary/90 disabled:opacity-50 transition-colors"
+          >
+            {installing ? (
+              <Loader2 className="w-3 h-3 animate-spin" />
+            ) : (
+              <Download className="w-3 h-3" />
+            )}
+            Quick install
+          </button>
+        )}
       </div>
     </div>
   );

app/admin/page.tsx

@@ -31,6 +31,7 @@ export default function AdminDashboardPage() {
   const [pluginCount, setPluginCount] = useState(0);
   const [themeCount, setThemeCount] = useState(0);
   const [policyRuleCount, setPolicyRuleCount] = useState(0);
+  const [accountCounts, setAccountCounts] = useState<{ total: number; active7d: number } | null>(null);
   const [jmapHealth, setJmapHealth] = useState<'unknown' | 'ok' | 'error'>('unknown');
 
   useEffect(() => {
@@ -38,7 +39,7 @@ export default function AdminDashboardPage() {
   }, []);
 
   async function fetchDashboardData() {
-    const [statusRes, auditRes, configRes, adminConfigRes, pluginRes, themeRes, policyRes] = await Promise.all([
+    const [statusRes, auditRes, configRes, adminConfigRes, pluginRes, themeRes, policyRes, telemetryRes] = await Promise.all([
       apiFetch('/api/admin/auth'),
       apiFetch('/api/admin/audit?limit=10'),
       apiFetch('/api/config'),
@@ -46,6 +47,7 @@ export default function AdminDashboardPage() {
       apiFetch('/api/admin/plugins').catch(() => null),
       apiFetch('/api/admin/themes').catch(() => null),
       apiFetch('/api/admin/policy').catch(() => null),
+      apiFetch('/api/admin/telemetry').catch(() => null),
     ]);
 
     if (statusRes.ok) setStatus(await statusRes.json());
@@ -73,6 +75,12 @@ export default function AdminDashboardPage() {
       const disabledGates = policy.features ? Object.values(policy.features).filter((v: unknown) => !v).length : 0;
       setPolicyRuleCount(restrictionCount + disabledGates);
     }
+    if (telemetryRes?.ok) {
+      const telemetry = await telemetryRes.json();
+      if (telemetry.accountCounts && typeof telemetry.accountCounts.total === 'number') {
+        setAccountCounts(telemetry.accountCounts);
+      }
+    }
 
     if (configData?.jmapServerUrl) {
       try {
@@ -165,6 +173,16 @@ export default function AdminDashboardPage() {
         </SettingItem>
       </SettingsSection>
 
+      {/* Accounts */}
+      <SettingsSection title="Accounts" description="Unique logins recorded over the last 90 days">
+        <SettingItem label="Total accounts" description="Distinct identities seen in the retention window">
+          <span className="text-sm text-foreground">{accountCounts?.total ?? '-'}</span>
+        </SettingItem>
+        <SettingItem label="Active in last 7 days" description="Identities with a login in the past week">
+          <span className="text-sm text-foreground">{accountCounts?.active7d ?? '-'}</span>
+        </SettingItem>
+      </SettingsSection>
+
       {/* Extensions */}
       <SettingsSection title="Extensions" description="Installed plugins, themes, and policy rules">
         <SettingItem label="Plugins">

app/admin/policy/page.tsx

@@ -15,6 +15,7 @@ const FEATURE_GATE_LABELS: Partial<Record<keyof FeatureGates, { label: string; d
   customKeywordsEnabled: { label: 'Custom Keywords', description: 'Allow user-created labels and tags' },
   templatesEnabled: { label: 'Email Templates', description: 'Allow email template creation and library' },
   calendarTasksEnabled: { label: 'Calendar Tasks', description: 'Show task panel in calendar view' },
+  contactsEnabled: { label: 'Contacts', description: 'Enable contacts/address book features' },
   smimeEnabled: { label: 'S/MIME', description: 'Enable certificate management and email signing' },
   externalContentEnabled: { label: 'External Content', description: 'Allow users to choose external content loading policy' },
   debugModeEnabled: { label: 'Debug Mode', description: 'Allow users to enable debug/diagnostic mode' },

app/admin/telemetry/page.tsx

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

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

@@ -53,11 +53,19 @@ export async function GET(
 
     const buffer = await readFile(resolved);
 
+    // SVG can carry inline <script> and event handlers that execute when the
+    // file is fetched as a top-level document. Defense in depth on top of
+    // admin-only upload: nosniff blocks MIME confusion, the CSP forces a
+    // sandboxed unique origin so any script in an SVG is inert and cannot
+    // touch app cookies or storage.
     return new NextResponse(buffer, {
       headers: {
         'Content-Type': contentType,
         'Cache-Control': 'public, max-age=3600, must-revalidate',
         'Content-Length': String(buffer.length),
+        'X-Content-Type-Options': 'nosniff',
+        'Content-Security-Policy':
+          "default-src 'none'; img-src 'self' data:; style-src 'unsafe-inline'; sandbox",
       },
     });
   } catch {

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

@@ -0,0 +1,214 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth } from '@/lib/admin/session';
+import { logger } from '@/lib/logger';
+import {
+  getPluginRegistry,
+  getThemeRegistry,
+} from '@/lib/admin/plugin-registry';
+import JSZip from 'jszip';
+import { MAX_PLUGIN_SIZE, MAX_THEME_SIZE } from '@/lib/plugin-types';
+
+const DIRECTORY_URL = process.env.EXTENSION_DIRECTORY_URL || 'https://extensions.bulwarkmail.org';
+
+const MAX_PREVIEW_SOURCE_LEN = 100_000;
+
+/**
+ * GET /api/admin/marketplace/[slug]
+ * Returns full preview info for an extension: directory metadata,
+ * the bundle's manifest, a (truncated) source preview, and install status.
+ * Lets admins audit what they're about to install before pressing the button.
+ */
+export async function GET(
+  _request: NextRequest,
+  { params }: { params: Promise<{ slug: string }> },
+) {
+  try {
+    const result = await requireAdminAuth();
+    if ('error' in result) return result.error;
+
+    const { slug } = await params;
+
+    // 1. Extension metadata + screenshots + theme previews from the directory
+    const detailUrl = new URL(`/api/v1/extension/${encodeURIComponent(slug)}`, DIRECTORY_URL);
+    const detailRes = await fetch(detailUrl.toString(), {
+      headers: { Accept: 'application/json' },
+      signal: AbortSignal.timeout(10000),
+    });
+
+    if (!detailRes.ok) {
+      const status = detailRes.status === 404 ? 404 : 502;
+      return NextResponse.json(
+        { error: status === 404 ? 'Extension not found' : 'Directory request failed' },
+        { status },
+      );
+    }
+
+    const detailJson = await detailRes.json();
+    const extension = detailJson.data as Record<string, unknown> | undefined;
+    if (!extension) {
+      return NextResponse.json({ error: 'Extension not found' }, { status: 404 });
+    }
+
+    const type = extension.type as 'plugin' | 'theme';
+    const latestVersion = (extension.latestVersion as { version?: string } | null)?.version
+      ?? null;
+
+    // 2. Pull the bundle so we can show what's actually inside.
+    let manifest: Record<string, unknown> | null = null;
+    let sourcePreview: { name: string; content: string; truncated: boolean } | null = null;
+    let bundleError: string | null = null;
+    let bundleSize = 0;
+
+    if (latestVersion) {
+      try {
+        const bundleUrl = new URL(
+          `/api/v1/bundle/${encodeURIComponent(slug)}/${encodeURIComponent(latestVersion)}`,
+          DIRECTORY_URL,
+        );
+        const bundleRes = await fetch(bundleUrl.toString(), {
+          signal: AbortSignal.timeout(30000),
+        });
+
+        if (!bundleRes.ok) {
+          bundleError = `Bundle download failed (${bundleRes.status})`;
+        } else {
+          const buffer = await bundleRes.arrayBuffer();
+          bundleSize = buffer.byteLength;
+          const maxSize = type === 'theme' ? MAX_THEME_SIZE : MAX_PLUGIN_SIZE;
+          if (buffer.byteLength > maxSize) {
+            bundleError = `Bundle exceeds ${type === 'theme' ? '1 MB' : '5 MB'} size limit`;
+          } else {
+            const zip = await JSZip.loadAsync(buffer);
+
+            // Detect optional root directory inside the ZIP.
+            const entries = Object.keys(zip.files);
+            const topDirs = new Set(entries.map((e) => e.split('/')[0]));
+            let root = '';
+            if (topDirs.size === 1) {
+              const dir = [...topDirs][0];
+              if (zip.files[dir + '/'] || entries.some((e) => e.startsWith(dir + '/'))) {
+                root = dir + '/';
+              }
+            }
+
+            const manifestFile = zip.file(root + 'manifest.json');
+            if (!manifestFile) {
+              bundleError = 'Bundle missing manifest.json';
+            } else {
+              try {
+                manifest = JSON.parse(await manifestFile.async('string'));
+              } catch {
+                bundleError = 'Invalid manifest.json in bundle';
+              }
+            }
+
+            if (manifest) {
+              if (type === 'theme') {
+                const cssFile = zip.file(root + 'theme.css');
+                if (cssFile) {
+                  const css = await cssFile.async('string');
+                  sourcePreview = {
+                    name: 'theme.css',
+                    content: css.length > MAX_PREVIEW_SOURCE_LEN
+                      ? css.slice(0, MAX_PREVIEW_SOURCE_LEN)
+                      : css,
+                    truncated: css.length > MAX_PREVIEW_SOURCE_LEN,
+                  };
+                }
+              } else {
+                const entrypoint = (manifest.entrypoint as string) || 'index.js';
+                const jsFile = zip.file(root + entrypoint);
+                if (jsFile) {
+                  const code = await jsFile.async('string');
+                  sourcePreview = {
+                    name: entrypoint,
+                    content: code.length > MAX_PREVIEW_SOURCE_LEN
+                      ? code.slice(0, MAX_PREVIEW_SOURCE_LEN)
+                      : code,
+                    truncated: code.length > MAX_PREVIEW_SOURCE_LEN,
+                  };
+                }
+              }
+            }
+          }
+        }
+      } catch (err) {
+        bundleError = err instanceof Error ? err.message : 'Failed to read bundle';
+      }
+    } else {
+      bundleError = 'Extension has no published version';
+    }
+
+    // 3. Install status (slug is used as the registry id at install time)
+    const [pluginRegistry, themeRegistry] = await Promise.all([
+      getPluginRegistry(),
+      getThemeRegistry(),
+    ]);
+    const installed = type === 'theme'
+      ? themeRegistry.themes.some((t) => t.id === slug)
+      : pluginRegistry.plugins.some((p) => p.id === slug);
+
+    // 4. Build screenshot URLs (proxy through the directory's public files endpoint).
+    const screenshots = Array.isArray(extension.screenshots)
+      ? (extension.screenshots as Array<{ path: string; altText?: string | null }>).map((s) => ({
+          url: new URL(`/api/v1/files/${s.path}`, DIRECTORY_URL).toString(),
+          altText: s.altText ?? null,
+        }))
+      : [];
+
+    // Strip the heavy `manifest` blob from versions when echoing the directory data.
+    const versions = Array.isArray(extension.versions)
+      ? (extension.versions as Array<Record<string, unknown>>).map((v) => ({
+          version: v.version,
+          changelog: v.changelog,
+          bundleSize: v.bundleSize,
+          minAppVersion: v.minAppVersion,
+          publishedAt: v.publishedAt,
+          permissions: v.permissions,
+        }))
+      : [];
+
+    return NextResponse.json(
+      {
+        extension: {
+          slug: extension.slug,
+          name: extension.name,
+          type: extension.type,
+          pluginType: extension.pluginType ?? null,
+          description: extension.description,
+          longDescription: extension.longDescription ?? null,
+          tags: extension.tags ?? [],
+          permissions: extension.permissions ?? [],
+          totalDownloads: extension.totalDownloads ?? 0,
+          featured: extension.featured ?? false,
+          githubRepo: extension.githubRepo ?? null,
+          license: extension.license ?? null,
+          minAppVersion: extension.minAppVersion ?? null,
+          author: extension.author ?? null,
+          latestVersion,
+          versions,
+          screenshots,
+          themePreviews: extension.themePreviews ?? [],
+          createdAt: extension.createdAt ?? null,
+          updatedAt: extension.updatedAt ?? null,
+        },
+        bundle: {
+          manifest,
+          source: sourcePreview,
+          size: bundleSize,
+          error: bundleError,
+        },
+        installed,
+      },
+      { headers: { 'Cache-Control': 'no-store' } },
+    );
+  } catch (error) {
+    logger.error('Marketplace preview error', {
+      error: error instanceof Error ? error.message : 'Unknown error',
+    });
+    return NextResponse.json(
+      { error: 'Failed to load preview' },
+      { status: 502 },
+    );
+  }
+}

app/api/admin/marketplace/route.ts

@@ -10,11 +10,15 @@ import {
   type ServerPlugin,
   type ServerTheme,
 } from '@/lib/admin/plugin-registry';
+import {
+  sanitizeFrameOrigins,
+  invalidateFrameOriginsCache,
+} from '@/lib/admin/csp-frame-origins';
 import JSZip from 'jszip';
 import { MAX_PLUGIN_SIZE, MAX_THEME_SIZE, ALL_PERMISSIONS, ALLOWED_PLUGIN_FILES } from '@/lib/plugin-types';
 import { sanitizeThemeCSS, validateThemeCSSSafety } from '@/lib/theme-loader';
 
-const DIRECTORY_URL = process.env.EXTENSION_DIRECTORY_URL || 'http://localhost:3001';
+const DIRECTORY_URL = process.env.EXTENSION_DIRECTORY_URL || 'https://extensions.bulwarkmail.org';
 
 /**
  * GET /api/admin/marketplace - Search/browse the extension directory
@@ -226,6 +230,22 @@ export async function POST(request: NextRequest) {
         warnings.push(`Unknown permissions: ${unknownPerms.join(', ')}`);
       }
 
+      // Plugins may declare iframe origins they need for embedded content.
+      // Anything that doesn't pass strict origin validation is silently
+      // dropped - the plugin still installs, but those origins are not
+      // added to the host CSP.
+      const declaredFrameOrigins = sanitizeFrameOrigins(manifest.frameOrigins);
+      const droppedFrameOrigins = Array.isArray(manifest.frameOrigins)
+        ? (manifest.frameOrigins as unknown[]).filter(
+            (v) => typeof v !== 'string' || !declaredFrameOrigins.includes(v),
+          )
+        : [];
+      if (droppedFrameOrigins.length > 0) {
+        warnings.push(
+          `Ignored invalid frameOrigins: ${droppedFrameOrigins.join(', ')}`,
+        );
+      }
+
       const plugin: ServerPlugin = {
         id: (manifest.id as string) || slug,
         name: (manifest.name as string) || slug,
@@ -238,10 +258,14 @@ export async function POST(request: NextRequest) {
         enabled: true,
         installedAt: now,
         updatedAt: now,
+        ...(declaredFrameOrigins.length > 0
+          ? { frameOrigins: declaredFrameOrigins }
+          : {}),
       };
 
       await savePlugin(plugin, code);
-      await auditLog('marketplace.install_plugin', { id: plugin.id, name: plugin.name, version: plugin.version, slug }, ip);
+      invalidateFrameOriginsCache();
+      await auditLog('marketplace.install_plugin', { id: plugin.id, name: plugin.name, version: plugin.version, slug, frameOrigins: declaredFrameOrigins }, ip);
 
       return NextResponse.json({ success: true, plugin, warnings });
     }

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

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

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

@@ -2,15 +2,20 @@ 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';
+import { getStalwartCredentials } from '@/lib/stalwart/credentials';
 
 /**
- * GET /api/admin/plugins/[id]/config - Read all config for a plugin
+ * GET /api/admin/plugins/[id]/config - Read plugin config
  *
- * Returns the full config object for admin-configured plugin settings.
- * This endpoint is accessible from the client-side plugin API.
+ * - Admin sessions receive every field, including those declared
+ *   `type: 'secret'` in the plugin's configSchema.
+ * - Authenticated mailbox users (the plugin running in their browser)
+ *   receive only non-secret fields.
+ * - Anonymous callers are rejected so unauthenticated visitors cannot
+ *   enumerate plugin secrets.
  */
 export async function GET(
-  _request: NextRequest,
+  request: NextRequest,
   { params }: { params: Promise<{ id: string }> },
 ) {
   try {
@@ -20,13 +25,34 @@ export async function GET(
       return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
     }
 
+    const adminAuth = await requireAdminAuth();
+    const isAdmin = !('error' in adminAuth);
+
+    if (!isAdmin) {
+      const creds = await getStalwartCredentials(request);
+      if (!creds) {
+        return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+      }
+    }
+
     const plugin = await getPlugin(id);
     if (!plugin) {
       return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
     }
 
     const config = await getPluginConfig(id);
-    return NextResponse.json(config, {
+
+    let response: Record<string, unknown> = config;
+    if (!isAdmin && plugin.configSchema) {
+      response = {};
+      for (const [key, value] of Object.entries(config)) {
+        const field = plugin.configSchema[key];
+        if (field?.type === 'secret') continue;
+        response[key] = value;
+      }
+    }
+
+    return NextResponse.json(response, {
       headers: { 'Cache-Control': 'no-store' },
     });
   } catch {

app/api/admin/plugins/route.ts

@@ -8,6 +8,10 @@ import {
   deletePlugin as removePlugin,
   type ServerPlugin,
 } from '@/lib/admin/plugin-registry';
+import {
+  sanitizeFrameOrigins,
+  invalidateFrameOriginsCache,
+} from '@/lib/admin/csp-frame-origins';
 
 // Server-side extraction using the same validation logic
 // ZIP parsing needs to happen on the server for admin-uploaded plugins
@@ -152,6 +156,8 @@ export async function POST(request: NextRequest) {
       );
     }
 
+    const declaredFrameOrigins = sanitizeFrameOrigins(manifest.frameOrigins);
+
     const now = new Date().toISOString();
     const plugin: ServerPlugin = {
       id: manifest.id as string,
@@ -166,12 +172,16 @@ export async function POST(request: NextRequest) {
       ...(manifest.configSchema && typeof manifest.configSchema === 'object'
         ? { configSchema: manifest.configSchema as ServerPlugin['configSchema'] }
         : {}),
+      ...(declaredFrameOrigins.length > 0
+        ? { frameOrigins: declaredFrameOrigins }
+        : {}),
       installedAt: now,
       updatedAt: now,
     };
 
     await savePlugin(plugin, code);
-    await auditLog('plugin.install', { id: plugin.id, name: plugin.name, version: plugin.version }, ip);
+    invalidateFrameOriginsCache();
+    await auditLog('plugin.install', { id: plugin.id, name: plugin.name, version: plugin.version, frameOrigins: declaredFrameOrigins }, ip);
 
     return NextResponse.json({ plugin });
   } catch (error) {
@@ -209,6 +219,11 @@ export async function PATCH(request: NextRequest) {
       return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
     }
 
+    // Enable/disable changes the set of plugins contributing frame origins.
+    if (typeof updates.enabled === 'boolean' || typeof updates.forceEnabled === 'boolean') {
+      invalidateFrameOriginsCache();
+    }
+
     await auditLog('plugin.update', { id, ...updates }, ip);
     return NextResponse.json({ plugin: updated });
   } catch (error) {
@@ -238,6 +253,7 @@ export async function DELETE(request: NextRequest) {
       return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
     }
 
+    invalidateFrameOriginsCache();
     await auditLog('plugin.delete', { id }, ip);
     return NextResponse.json({ success: true });
   } catch (error) {

app/api/admin/telemetry/route.ts

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

app/api/auth/session/route.ts

@@ -9,6 +9,9 @@ import {
   clearStalwartAuthContextInStore,
   setStalwartAuthContextInStore,
 } from '@/lib/stalwart/auth-context';
+import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
 
 const COOKIE_OPTIONS = {
   ...getCookieOptions(),
@@ -25,7 +28,9 @@ function getSlot(request: NextRequest): number {
 
 export async function POST(request: NextRequest) {
   try {
-    if (process.env.OAUTH_ENABLED === 'true' && process.env.OAUTH_ONLY === 'true') {
+    const oauthEnabled = configManager.get<boolean>('oauthEnabled', false);
+    const oauthOnly = configManager.get<boolean>('oauthOnly', false);
+    if (oauthEnabled && oauthOnly) {
       return NextResponse.json({ error: 'Basic authentication is disabled' }, { status: 403 });
     }
 
@@ -34,10 +39,37 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
     }
 
+    // Pin the upstream URL to the configured JMAP server so an unauthenticated
+    // caller cannot point this route at internal hosts. Only when no server URL
+    // is configured AND the deployment explicitly allows custom JMAP endpoints
+    // do we honor the body URL — and even then it must be a public URL.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
+
+    let upstreamUrl: string;
+    let upstreamTrusted: boolean;
+    if (configuredServerUrl) {
+      upstreamUrl = configuredServerUrl;
+      upstreamTrusted = true;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        return NextResponse.json({ error: 'Server URL is not allowed' }, { status: 400 });
+      }
+      upstreamUrl = serverUrl;
+      upstreamTrusted = false;
+    } else {
+      return NextResponse.json({ error: 'JMAP server not configured' }, { status: 500 });
+    }
+
     const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : getSlot(request);
     const cookieName = sessionCookieName(slot);
     const authHeader = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
-    const normalizedServerUrl = await verifyJmapAuth(serverUrl, authHeader);
+    const normalizedServerUrl = await verifyJmapAuth(upstreamUrl, authHeader, { trusted: upstreamTrusted });
     const token = encryptSession(normalizedServerUrl, username, password);
     const cookieStore = await cookies();
     cookieStore.set(cookieName, token, COOKIE_OPTIONS);
@@ -47,6 +79,8 @@ export async function POST(request: NextRequest) {
       authHeader,
     });
 
+    void recordLogin(username, normalizedServerUrl);
+
     return NextResponse.json({ ok: true });
   } catch (error) {
     if (error instanceof JmapAuthVerificationError) {

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

@@ -2,6 +2,9 @@ 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';
+import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
 
 function getSlot(request: NextRequest, bodySlot: unknown): number {
   if (typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4) {
@@ -23,8 +26,35 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
     }
 
+    // Pin the upstream URL to the configured JMAP server so an unauthenticated
+    // caller cannot point this route at internal hosts. Only when no server URL
+    // is configured AND the deployment explicitly allows custom JMAP endpoints
+    // do we honor the body URL — and even then it must be a public URL.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
+
+    let upstreamUrl: string;
+    let upstreamTrusted: boolean;
+    if (configuredServerUrl) {
+      upstreamUrl = configuredServerUrl;
+      upstreamTrusted = true;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        return NextResponse.json({ error: 'Server URL is not allowed' }, { status: 400 });
+      }
+      upstreamUrl = serverUrl;
+      upstreamTrusted = false;
+    } else {
+      return NextResponse.json({ error: 'JMAP server not configured' }, { status: 500 });
+    }
+
     const slot = getSlot(request, bodySlot);
-    const normalizedServerUrl = await verifyJmapAuth(serverUrl, authHeader);
+    const normalizedServerUrl = await verifyJmapAuth(upstreamUrl, authHeader, { trusted: upstreamTrusted });
 
     await setStalwartAuthContext(slot, {
       serverUrl: normalizedServerUrl,
@@ -32,6 +62,8 @@ export async function POST(request: NextRequest) {
       authHeader,
     });
 
+    void recordLogin(username, normalizedServerUrl);
+
     return NextResponse.json({ ok: true });
   } catch (error) {
     if (error instanceof JmapAuthVerificationError) {

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

@@ -5,6 +5,9 @@ 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';
+import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
 
 /**
  * Exchange basic auth credentials (with TOTP appended) for OAuth tokens.
@@ -83,22 +86,39 @@ export async function POST(request: NextRequest) {
 
     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;
+    // Pin the upstream URL to the configured JMAP server so an unauthenticated
+    // caller cannot point this route at internal hosts. Only when no server
+    // URL is configured (and the deployment explicitly allows custom JMAP
+    // endpoints) do we fall back to the user-supplied URL - and even then
+    // it must resolve to a public address.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
 
-    const 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 });
+    let upstreamUrl: string;
+    if (configuredServerUrl) {
+      upstreamUrl = configuredServerUrl;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        logger.warn('TOTP token exchange: rejected non-public server URL');
+        return NextResponse.json({ error: 'invalid_server_url' }, { status: 400 });
       }
-      return await attemptAllStrategies(clientEndpoint, username, password, slot);
+      upstreamUrl = serverUrl;
+    } else {
+      return NextResponse.json({ error: 'jmap_server_not_configured' }, { status: 500 });
     }
 
-    return await attemptAllStrategies(tokenEndpoint, username, password, slot);
+    const tokenEndpoint = await findTokenEndpoint(upstreamUrl);
+    if (!tokenEndpoint) {
+      logger.warn('TOTP token exchange: no token endpoint found');
+      return NextResponse.json({ error: 'no_token_endpoint', detail: 'Could not discover OAuth token endpoint on the mail server' }, { status: 404 });
+    }
+
+    return await attemptAllStrategies(tokenEndpoint, upstreamUrl, username, password, slot);
   } 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 });
@@ -107,14 +127,15 @@ export async function POST(request: NextRequest) {
 
 async function attemptAllStrategies(
   tokenEndpoint: string,
+  serverUrl: 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 clientId = configManager.get<string>('oauthClientId', '') || process.env.OAUTH_CLIENT_ID;
+  const clientSecret = configManager.get<string>('oauthClientSecret', '') || process.env.OAUTH_CLIENT_SECRET || readFileEnv(process.env.OAUTH_CLIENT_SECRET_FILE);
   const basicAuth = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
   const attempts: Array<{ strategy: string; error: string }> = [];
 
@@ -125,6 +146,7 @@ async function attemptAllStrategies(
     const result = await tryTokenRequest(tokenEndpoint, params);
     if (result.ok) {
       logger.info('TOTP token exchange succeeded (ROPC with client_id)');
+      void recordLogin(username, serverUrl);
       return await storeAndRespond(result.tokens, slot);
     }
     attempts.push({ strategy: 'ROPC with client_id', error: result.error });
@@ -136,6 +158,7 @@ async function attemptAllStrategies(
     const result = await tryTokenRequest(tokenEndpoint, params);
     if (result.ok) {
       logger.info('TOTP token exchange succeeded (ROPC without client_id)');
+      void recordLogin(username, serverUrl);
       return await storeAndRespond(result.tokens, slot);
     }
     attempts.push({ strategy: 'ROPC without client_id', error: result.error });
@@ -147,6 +170,7 @@ async function attemptAllStrategies(
     const result = await tryTokenRequest(tokenEndpoint, params, { 'Authorization': basicAuth });
     if (result.ok) {
       logger.info('TOTP token exchange succeeded (Basic Auth header)');
+      void recordLogin(username, serverUrl);
       return await storeAndRespond(result.tokens, slot);
     }
     attempts.push({ strategy: 'Basic Auth header', error: result.error });
@@ -158,6 +182,7 @@ async function attemptAllStrategies(
     const result = await tryTokenRequest(tokenEndpoint, params, { 'Authorization': basicAuth });
     if (result.ok) {
       logger.info('TOTP token exchange succeeded (client_credentials + Basic Auth)');
+      void recordLogin(username, serverUrl);
       return await storeAndRespond(result.tokens, slot);
     }
     attempts.push({ strategy: 'client_credentials + Basic Auth', error: result.error });

app/api/dev-jmap/[...path]/route.ts

@@ -112,10 +112,9 @@ const emails: MockEmail[] = [
     preview: 'Hallo! This is a sample email to help you get started with the Bulwark Webmail development environment.',
     hasAttachment: false,
     textBody: [{ partId: 'p1', blobId: 'blob-001', size: 280, type: 'text/plain' }],
-    htmlBody: [{ partId: 'p2', blobId: 'blob-002', size: 420, type: 'text/html' }],
+    htmlBody: [],
     bodyValues: {
       p1: { value: 'Hallo!\n\nThis is a sample email to help you get started with the Bulwark Webmail development environment.\n\nFeel free to explore the UI - all data here is mock data.\n\nBeste Grüße,\nSophie' },
-      p2: { value: '<p>Hallo!</p><p>This is a sample email to help you get started with the <strong>Bulwark Webmail</strong> development environment.</p><p>Feel free to explore the UI - all data here is mock data.</p><p>Beste Grüße,<br>Sophie</p>' },
     },
   },
   {

app/api/fetch-ical/route.ts

@@ -1,89 +1,9 @@
-import { lookup } from 'node:dns/promises';
-import { BlockList, isIP } from 'node:net';
 import { NextRequest, NextResponse } from 'next/server';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
 
 const MAX_RESPONSE_SIZE = 10 * 1024 * 1024; // 10MB
 const FETCH_TIMEOUT_MS = 15000;
 
-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);
-  } catch {
-    return false;
-  }
-
-  if (url.protocol !== 'https:' && url.protocol !== 'http:') {
-    return false;
-  }
-
-  const hostname = normalizeHostname(url.hostname);
-
-  // Block private/internal hostnames
-  if (
-    hostname === 'localhost' ||
-    hostname.endsWith('.localhost') ||
-    hostname.endsWith('.local') ||
-    hostname.endsWith('.internal') ||
-    hostname.endsWith('.arpa') ||
-    hostname.endsWith('.localdomain')
-  ) {
-    return false;
-  }
-
-  // Block URLs with credentials
-  if (url.username || url.password) {
-    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) {
   let body: { url?: string };
   try {
@@ -98,7 +18,7 @@ export async function POST(request: NextRequest) {
     return NextResponse.json({ error: 'URL is required' }, { status: 400 });
   }
 
-  if (!(await isValidExternalUrl(url))) {
+  if (!(await isPublicHttpUrl(url))) {
     return NextResponse.json({ error: 'Invalid or disallowed URL' }, { status: 400 });
   }
 
@@ -111,7 +31,7 @@ export async function POST(request: NextRequest) {
     let response: Response | undefined;
 
     for (let i = 0; i <= MAX_REDIRECTS; i++) {
-      if (!(await isValidExternalUrl(currentUrl))) {
+      if (!(await isPublicHttpUrl(currentUrl))) {
         clearTimeout(timeout);
         return NextResponse.json({ error: 'Redirect to disallowed URL' }, { status: 400 });
       }
@@ -131,7 +51,6 @@ export async function POST(request: NextRequest) {
           clearTimeout(timeout);
           return NextResponse.json({ error: 'Redirect without Location header' }, { status: 502 });
         }
-        // Resolve relative redirects
         currentUrl = new URL(location, currentUrl).toString();
         continue;
       }

app/api/push/preview/route.ts

@@ -0,0 +1,140 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { logger } from '@/lib/logger';
+import { getStalwartCredentials } from '@/lib/stalwart/credentials';
+
+export const runtime = 'nodejs';
+export const dynamic = 'force-dynamic';
+
+/**
+ * GET /api/push/preview
+ *
+ * Called from the service worker when a Web Push wake-up arrives. Fetches the
+ * latest unread email so the SW can build an enriched system notification
+ * (sender, subject, avatar) without ever exposing JMAP credentials to the
+ * SW context.
+ *
+ * The relay's push payload is intentionally minimal (just a state-change
+ * ping), so this is what makes "From: Alice / Subject: …" appear instead of
+ * a generic "New mail" string.
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const creds = await getStalwartCredentials(request);
+    if (!creds) {
+      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+    }
+
+    const sessionRes = await fetch(`${creds.serverUrl}/.well-known/jmap`, {
+      headers: { Authorization: creds.authHeader },
+    });
+    if (!sessionRes.ok) {
+      return NextResponse.json({ error: 'JMAP session failed' }, { status: 502 });
+    }
+    const session = (await sessionRes.json()) as {
+      apiUrl?: string;
+      primaryAccounts?: Record<string, string>;
+    };
+    const apiUrl = session.apiUrl;
+    const accountId = session.primaryAccounts?.['urn:ietf:params:jmap:mail'];
+    if (!apiUrl || !accountId) {
+      return NextResponse.json({ error: 'Incomplete JMAP session' }, { status: 502 });
+    }
+
+    // Find the inbox, then pull the most recent unread message in it. We use
+    // a single batched JMAP request with back-references so this round-trip
+    // is one POST regardless of how many messages exist.
+    const requestBody = {
+      using: ['urn:ietf:params:jmap:core', 'urn:ietf:params:jmap:mail'],
+      methodCalls: [
+        [
+          'Mailbox/query',
+          { accountId, filter: { role: 'inbox' }, limit: 1 },
+          'mb',
+        ],
+        [
+          'Email/query',
+          {
+            accountId,
+            filter: {
+              operator: 'AND',
+              conditions: [
+                { inMailbox: { resultOf: 'mb', name: 'Mailbox/query', path: '/ids/0' } },
+                { notKeyword: '$seen' },
+              ],
+            },
+            sort: [{ property: 'receivedAt', isAscending: false }],
+            limit: 1,
+            calculateTotal: true,
+          },
+          'eq',
+        ],
+        [
+          'Email/get',
+          {
+            accountId,
+            '#ids': { resultOf: 'eq', name: 'Email/query', path: '/ids' },
+            properties: ['id', 'threadId', 'from', 'subject', 'preview', 'receivedAt'],
+          },
+          'eg',
+        ],
+      ],
+    };
+
+    const jmapRes = await fetch(apiUrl, {
+      method: 'POST',
+      headers: {
+        Authorization: creds.authHeader,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(requestBody),
+    });
+    if (!jmapRes.ok) {
+      return NextResponse.json({ error: 'JMAP request failed' }, { status: 502 });
+    }
+    const data = (await jmapRes.json()) as {
+      methodResponses: [string, Record<string, unknown>, string][];
+    };
+
+    type EmailLite = {
+      id: string;
+      threadId: string;
+      from?: { name?: string | null; email?: string }[] | null;
+      subject?: string | null;
+      preview?: string | null;
+      receivedAt?: string | null;
+    };
+
+    let email: EmailLite | null = null;
+    let unreadTotal = 0;
+    for (const [method, body] of data.methodResponses) {
+      if (method === 'Email/query') {
+        unreadTotal = ((body as { total?: number }).total) ?? 0;
+      }
+      if (method === 'Email/get') {
+        const list = (body as { list?: EmailLite[] }).list ?? [];
+        email = list[0] ?? null;
+      }
+    }
+
+    return NextResponse.json({
+      email,
+      unreadTotal,
+    }, {
+      headers: {
+        // SW already gates on its own logic - don't let push events get
+        // cached and served stale.
+        'Cache-Control': 'no-store',
+      },
+    });
+  } catch (error) {
+    // `fetch failed` from undici is too generic to debug — the real reason
+    // (ENOTFOUND, ECONNREFUSED, TLS error, …) is on `error.cause`.
+    const err = error as Error & { cause?: { code?: string; message?: string } };
+    logger.error('push preview failed', {
+      error: err?.message ?? 'Unknown error',
+      causeCode: err?.cause?.code,
+      causeMessage: err?.cause?.message,
+    });
+    return NextResponse.json({ error: 'Internal error' }, { status: 500 });
+  }
+}

app/globals.css

@@ -204,6 +204,31 @@ body {
   min-width: 100%;
 }
 
+/* Forces light-theme CSS variables inside the email content area, so when
+   "Always Show Emails in Light Mode" is enabled in dark theme the surrounding
+   sender info / attachments / plain-text body don't end up with light text
+   on a white background. */
+.email-content-light {
+  --color-background: #ffffff;
+  --color-foreground: #0f172a;
+  --color-muted: #f1f5f9;
+  --color-muted-foreground: #64748b;
+  --color-border: #e2e8f0;
+  --color-card: #ffffff;
+  --color-card-foreground: #0f172a;
+  --color-popover: #ffffff;
+  --color-popover-foreground: #0f172a;
+  --color-secondary: #f8fafc;
+  --color-secondary-foreground: #0f172a;
+  --color-accent: #dbeafe;
+  --color-accent-foreground: #1e40af;
+  --color-input: #e2e8f0;
+}
+
+.email-content-light .email-content-text a {
+  color: #2563eb;
+}
+
 .email-content-text {
   padding: 1rem 1.25rem;
 }
@@ -680,3 +705,54 @@ body {
 .tiptap .ProseMirror-selectednode img {
   outline: none;
 }
+
+.tiptap table {
+  border-collapse: collapse;
+  margin: 0.5rem 0;
+  table-layout: fixed;
+  width: 100%;
+  overflow: hidden;
+}
+
+.tiptap table td,
+.tiptap table th {
+  border: 1px solid var(--color-border);
+  padding: 0.375rem 0.5rem;
+  vertical-align: top;
+  position: relative;
+  min-width: 1em;
+}
+
+.tiptap table th {
+  background-color: var(--color-muted) !important;
+  color: var(--color-foreground) !important;
+  font-weight: 600;
+  text-align: left;
+}
+
+.tiptap table p {
+  margin: 0;
+}
+
+.tiptap table .selectedCell::after {
+  background: rgba(99, 102, 241, 0.15);
+  content: "";
+  inset: 0;
+  pointer-events: none;
+  position: absolute;
+  z-index: 2;
+}
+
+.tiptap table .column-resize-handle {
+  background-color: var(--color-primary);
+  bottom: -2px;
+  pointer-events: none;
+  position: absolute;
+  right: -2px;
+  top: 0;
+  width: 4px;
+}
+
+.tiptap.resize-cursor {
+  cursor: col-resize;
+}

components/calendar/calendar-day-view.tsx

@@ -20,6 +20,7 @@ interface CalendarDayViewProps {
   onHoverEvent?: (event: CalendarEvent, anchorRect: DOMRect) => void;
   onHoverLeave?: () => void;
   onContextMenuEvent?: (e: React.MouseEvent, event: CalendarEvent) => void;
+  onContextMenuEmpty?: (e: React.MouseEvent, date: Date, hour?: number, allDayArea?: boolean) => void;
   onCreateAtTime: (date: Date, endDate?: Date) => void;
   timeFormat?: "12h" | "24h";
   isMobile?: boolean;
@@ -39,6 +40,7 @@ export function CalendarDayView({
   onHoverEvent,
   onHoverLeave,
   onContextMenuEvent,
+  onContextMenuEmpty,
   onCreateAtTime,
   timeFormat = "24h",
   isMobile,
@@ -119,6 +121,7 @@ export function CalendarDayView({
       created: t("notifications.event_created"),
       error: t("notifications.event_error"),
     },
+    isMobile,
   });
 
   const formatHour = (h: number): string => {
@@ -143,7 +146,13 @@ export function CalendarDayView({
       </div>
 
       {(allDayEvents.length > 0 || dayTasks.length > 0) && (
-        <div className="px-4 py-2 border-b border-border">
+        <div
+          className="px-4 py-2 border-b border-border"
+          onContextMenu={onContextMenuEmpty ? (e) => {
+            if ((e.target as HTMLElement).closest("[data-calendar-event],button")) return;
+            onContextMenuEmpty(e, selectedDate, undefined, true);
+          } : undefined}
+        >
           {allDayEvents.length > 0 && (
             <>
               <div className="text-[10px] text-muted-foreground mb-1">{t("events.all_day")}</div>
@@ -239,6 +248,7 @@ export function CalendarDayView({
                 aria-label={formatHour(h)}
                 onClick={() => handleSlotClick(selectedDate, h)}
                 onDoubleClick={() => handleSlotDoubleClick(selectedDate, h)}
+                onContextMenu={onContextMenuEmpty ? (e) => onContextMenuEmpty(e, selectedDate, h, false) : undefined}
                 className="border-b border-border/50 hover:bg-muted/30 cursor-pointer transition-colors"
                 style={{ height: HOUR_HEIGHT }}
               />
@@ -246,9 +256,11 @@ export function CalendarDayView({
 
             {layouted.map(({ event: ev, column, totalColumns, startMinutes, endMinutes }) => {
               const durMin = Math.max(15, endMinutes - startMinutes);
-              const top = (startMinutes / 60) * HOUR_HEIGHT;
+              const baseTop = (startMinutes / 60) * HOUR_HEIGHT;
               const baseHeight = Math.max(24, (durMin / 60) * HOUR_HEIGHT);
-              const height = resizeVisual?.eventId === ev.id ? resizeVisual.heightPx : baseHeight;
+              const isResizing = resizeVisual?.eventId === ev.id;
+              const top = isResizing ? resizeVisual!.topPx : baseTop;
+              const height = isResizing ? resizeVisual!.heightPx : baseHeight;
               const calId = getPrimaryCalendarId(ev);
               const leftPct = (column / totalColumns) * 100;
               const widthPct = (1 / totalColumns) * 100;
@@ -270,11 +282,21 @@ export function CalendarDayView({
                     onContextMenu={onContextMenuEvent}
                     draggable
                   />
+                  <div
+                    data-resize-handle
+                    className="absolute top-0 left-1 right-1 h-3 cursor-n-resize z-20 flex items-start justify-center opacity-0 group-hover/event:opacity-100 transition-opacity"
+                    aria-label={t("events.resize")}
+                    onPointerDown={(e) => handleResizePointerDown(ev.id, "top", startMinutes, durMin, e)}
+                    onPointerMove={handleResizePointerMove}
+                    onPointerUp={handleResizePointerUp}
+                  >
+                    <div className="w-8 h-1 rounded-full bg-foreground/30 mt-0.5" />
+                  </div>
                   <div
                     data-resize-handle
                     className="absolute bottom-0 left-1 right-1 h-3 cursor-s-resize z-20 flex items-end justify-center opacity-0 group-hover/event:opacity-100 transition-opacity"
                     aria-label={t("events.resize")}
-                    onPointerDown={(e) => handleResizePointerDown(ev.id, durMin, e)}
+                    onPointerDown={(e) => handleResizePointerDown(ev.id, "bottom", startMinutes, durMin, e)}
                     onPointerMove={handleResizePointerMove}
                     onPointerUp={handleResizePointerUp}
                   >

components/calendar/calendar-month-view.tsx

@@ -24,6 +24,7 @@ interface CalendarMonthViewProps {
   onHoverEvent?: (event: CalendarEvent, anchorRect: DOMRect) => void;
   onHoverLeave?: () => void;
   onContextMenuEvent?: (e: React.MouseEvent, event: CalendarEvent) => void;
+  onContextMenuEmpty?: (e: React.MouseEvent, date: Date, hour?: number, allDayArea?: boolean) => void;
   onCreateAtTime?: (date: Date) => void;
   firstDayOfWeek?: number;
   isMobile?: boolean;
@@ -39,6 +40,7 @@ export function CalendarMonthView({
   onHoverEvent,
   onHoverLeave,
   onContextMenuEvent,
+  onContextMenuEmpty,
   onCreateAtTime,
   firstDayOfWeek = 1,
   isMobile,
@@ -174,6 +176,7 @@ export function CalendarMonthView({
                   aria-label={fullDateLabel}
                   onClick={() => onSelectDate(day)}
                   onDoubleClick={() => onCreateAtTime?.(day)}
+                  onContextMenu={onContextMenuEmpty ? (e) => onContextMenuEmpty(e, day, undefined, true) : undefined}
                   onDragOver={(e) => handleCellDragOver(e, key)}
                   onDragLeave={handleCellDragLeave}
                   onDrop={(e) => handleCellDrop(e, day)}

components/calendar/calendar-sidebar-panel.tsx

@@ -1,8 +1,8 @@
 "use client";
 
-import { useState, useRef, useEffect, useMemo } from "react";
+import { useMemo, useState } from "react";
 import { useTranslations } from "next-intl";
-import { Globe, ListTodo, Pencil, RefreshCw, Share2, Trash2, Cake } from "lucide-react";
+import { Globe, ListTodo, Pencil, RefreshCw, Share2, Trash2, Cake, Users, Plus, Eraser, Palette } from "lucide-react";
 import { cn, formatDateTime } from "@/lib/utils";
 import type { Calendar } from "@/lib/jmap/types";
 import { CalendarColorPicker } from "@/components/settings/calendar-management-settings";
@@ -11,6 +11,8 @@ 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 { ContextMenu, ContextMenuItem, ContextMenuSeparator, ContextMenuSubMenu } from "@/components/ui/context-menu";
+import { useContextMenu } from "@/hooks/use-context-menu";
 import type { IJMAPClient } from '@/lib/jmap/client-interface';
 
 interface CalendarSidebarPanelProps {
@@ -18,6 +20,11 @@ interface CalendarSidebarPanelProps {
   selectedCalendarIds: string[];
   onToggleVisibility: (id: string) => void;
   onColorChange?: (calendarId: string, color: string) => void;
+  onShareCalendar?: (calendar: Calendar) => void;
+  onCreateEvent?: (calendar: Calendar) => void;
+  onClearCalendar?: (calendar: Calendar) => void;
+  onDeleteCalendar?: (calendar: Calendar) => void;
+  onCreateCalendar?: () => void;
   onSubscribe?: () => void;
   onEditSubscription?: (subscriptionId: string) => void;
   client?: IJMAPClient | null;
@@ -28,12 +35,18 @@ export function CalendarSidebarPanel({
   selectedCalendarIds,
   onToggleVisibility,
   onColorChange,
+  onShareCalendar,
+  onCreateEvent,
+  onClearCalendar,
+  onDeleteCalendar,
+  onCreateCalendar,
   onSubscribe,
   onEditSubscription,
   client,
 }: CalendarSidebarPanelProps) {
   const t = useTranslations("calendar");
   const tSub = useTranslations("calendar.subscription");
+  const tMgmt = useTranslations("calendar.management");
   const isSubscriptionCalendar = useCalendarStore((s) => s.isSubscriptionCalendar);
   const icalSubscriptions = useCalendarStore((s) => s.icalSubscriptions);
   const refreshICalSubscription = useCalendarStore((s) => s.refreshICalSubscription);
@@ -49,11 +62,8 @@ export function CalendarSidebarPanel({
     return tasks.filter(t => t.progress !== 'completed' && t.progress !== 'cancelled' && t.due && new Date(t.due) < now).length;
   }, [tasks]);
 
-  const [colorPickerId, setColorPickerId] = useState<string | null>(null);
-  const [contextMenuCalId, setContextMenuCalId] = useState<string | null>(null);
+  const { contextMenu, openContextMenu, closeContextMenu, menuRef } = useContextMenu<Calendar>();
   const [refreshingSubId, setRefreshingSubId] = useState<string | null>(null);
-  const colorPickerRef = useRef<HTMLDivElement>(null);
-  const contextMenuRef = useRef<HTMLDivElement>(null);
 
   const personalCalendars = useMemo(() => calendars.filter(c => !c.isShared), [calendars]);
   const sharedAccountGroups = useMemo(() => {
@@ -69,30 +79,6 @@ export function CalendarSidebarPanel({
     return Array.from(groups.values());
   }, [calendars]);
 
-  useEffect(() => {
-    if (!colorPickerId && !contextMenuCalId) return;
-    const handleClick = (e: MouseEvent) => {
-      if (colorPickerRef.current && !colorPickerRef.current.contains(e.target as Node)) {
-        setColorPickerId(null);
-      }
-      if (contextMenuRef.current && !contextMenuRef.current.contains(e.target as Node)) {
-        setContextMenuCalId(null);
-      }
-    };
-    const handleKey = (e: KeyboardEvent) => {
-      if (e.key === 'Escape') {
-        setColorPickerId(null);
-        setContextMenuCalId(null);
-      }
-    };
-    document.addEventListener('mousedown', handleClick);
-    document.addEventListener('keydown', handleKey);
-    return () => {
-      document.removeEventListener('mousedown', handleClick);
-      document.removeEventListener('keydown', handleKey);
-    };
-  }, [colorPickerId, contextMenuCalId]);
-
   const getSubscriptionForCalendar = (calendarId: string) => {
     return icalSubscriptions.find(s => s.calendarId === calendarId);
   };
@@ -100,7 +86,6 @@ export function CalendarSidebarPanel({
   const handleRefreshSubscription = async (subId: string) => {
     if (!client) return;
     setRefreshingSubId(subId);
-    setContextMenuCalId(null);
     try {
       await refreshICalSubscription(client, subId);
       toast.success(tSub('refresh_success'));
@@ -113,7 +98,6 @@ export function CalendarSidebarPanel({
 
   const handleUnsubscribe = async (subId: string) => {
     if (!client) return;
-    setContextMenuCalId(null);
     try {
       await removeICalSubscription(client, subId);
       toast.success(tSub('deleted'));
@@ -127,21 +111,13 @@ export function CalendarSidebarPanel({
   const renderCalendarItem = (cal: Calendar) => {
     const isVisible = selectedCalendarIds.includes(cal.id);
     const color = cal.color || "#3b82f6";
+    const hasMenu = isSubscriptionCalendar(cal.id) ? !!client : true;
 
     return (
       <div key={cal.id} className="relative">
         <button
           onClick={() => onToggleVisibility(cal.id)}
-          onContextMenu={(e) => {
-            e.preventDefault();
-            if (isSubscriptionCalendar(cal.id) && client) {
-              setContextMenuCalId(contextMenuCalId === cal.id ? null : cal.id);
-              setColorPickerId(null);
-            } else if (onColorChange) {
-              setColorPickerId(colorPickerId === cal.id ? null : cal.id);
-              setContextMenuCalId(null);
-            }
-          }}
+          onContextMenu={hasMenu ? (e) => openContextMenu(e, cal) : undefined}
           className={cn(
             "flex items-center gap-2 w-full px-1.5 py-1 rounded-md text-sm transition-colors duration-150",
             "hover:bg-muted"
@@ -169,70 +145,101 @@ export function CalendarSidebarPanel({
             <Cake className="w-3 h-3 text-muted-foreground flex-shrink-0" />
           )}
         </button>
-
-        {/* Subscription context menu on right-click */}
-        {contextMenuCalId === cal.id && isSubscriptionCalendar(cal.id) && client && (() => {
-          const sub = getSubscriptionForCalendar(cal.id);
-          if (!sub) return null;
-          return (
-            <div
-              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"
-              >
-                <RefreshCw className="w-3.5 h-3.5" />
-                {tSub('refresh')}
-              </button>
-              <button
-                onClick={() => handleUnsubscribe(sub.id)}
-                className="flex items-center gap-2 w-full px-3 py-1.5 text-sm text-destructive hover:bg-destructive/10 transition-colors"
-              >
-                <Trash2 className="w-3.5 h-3.5" />
-                {tSub('unsubscribe')}
-              </button>
-              {sub.lastRefreshed && (
-                <div className="px-3 py-1.5 text-xs text-muted-foreground border-t border-border mt-1 pt-1">
-                  {tSub('last_refreshed', { time: formatDateTime(sub.lastRefreshed, timeFormat, { month: 'short', day: 'numeric', year: 'numeric' }) })}
-                </div>
-              )}
-            </div>
-          );
-        })()}
-
-        {/* Color picker popover on right-click */}
-        {colorPickerId === cal.id && onColorChange && (
-          <div
-            ref={colorPickerRef}
-            className="absolute left-6 top-full mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-3 w-56"
-          >
-            <p className="text-xs font-medium text-muted-foreground mb-2">{t("management.change_color")}</p>
-            <CalendarColorPicker
-              value={color}
-              onChange={(c) => {
-                onColorChange(cal.id, c);
-                setColorPickerId(null);
-              }}
-              allowCustom
-            />
-          </div>
-        )}
       </div>
     );
   };
 
+  const renderCalendarMenu = () => {
+    const cal = contextMenu.data;
+    if (!cal) return null;
+
+    if (isSubscriptionCalendar(cal.id)) {
+      const sub = getSubscriptionForCalendar(cal.id);
+      if (!sub || !client) return null;
+      return (
+        <ContextMenu ref={menuRef} isOpen={contextMenu.isOpen} position={contextMenu.position} onClose={closeContextMenu}>
+          <ContextMenuItem
+            icon={Pencil}
+            label={tSub('edit')}
+            onClick={() => { closeContextMenu(); onEditSubscription?.(sub.id); }}
+          />
+          <ContextMenuItem
+            icon={RefreshCw}
+            label={tSub('refresh')}
+            onClick={() => { closeContextMenu(); handleRefreshSubscription(sub.id); }}
+          />
+          <ContextMenuSeparator />
+          <ContextMenuItem
+            icon={Trash2}
+            label={tSub('unsubscribe')}
+            onClick={() => { closeContextMenu(); handleUnsubscribe(sub.id); }}
+            destructive
+          />
+          {sub.lastRefreshed && (
+            <div className="px-3 py-1.5 text-xs text-muted-foreground border-t border-border mt-1 pt-1">
+              {tSub('last_refreshed', { time: formatDateTime(sub.lastRefreshed, timeFormat, { month: 'short', day: 'numeric', year: 'numeric' }) })}
+            </div>
+          )}
+        </ContextMenu>
+      );
+    }
+
+    const isBirthday = cal.id === BIRTHDAY_CALENDAR_ID;
+    const canCreate = onCreateEvent && !isBirthday && cal.myRights?.mayWriteOwn !== false;
+    const canShare = onShareCalendar && cal.myRights?.mayShare && !cal.isShared;
+    const canChangeColor = !!onColorChange;
+    const canClear = onClearCalendar && !isBirthday && cal.myRights?.mayDelete !== false;
+    const canDelete = onDeleteCalendar && !isBirthday && !cal.isDefault && !cal.isShared;
+    const showSeparator = (canCreate || canShare || canChangeColor) && (canClear || canDelete);
+    const color = cal.color || "#3b82f6";
+
+    return (
+      <ContextMenu ref={menuRef} isOpen={contextMenu.isOpen} position={contextMenu.position} onClose={closeContextMenu}>
+        {canCreate && (
+          <ContextMenuItem
+            icon={Plus}
+            label={tMgmt('new_event_in_calendar')}
+            onClick={() => { closeContextMenu(); onCreateEvent(cal); }}
+          />
+        )}
+        {canShare && (
+          <ContextMenuItem
+            icon={Users}
+            label={tMgmt('share')}
+            onClick={() => { closeContextMenu(); onShareCalendar(cal); }}
+          />
+        )}
+        {canChangeColor && (
+          <ContextMenuSubMenu icon={Palette} label={tMgmt('change_color')}>
+            <div className="px-2 py-1.5 w-[200px]">
+              <CalendarColorPicker
+                value={color}
+                onChange={(c) => { onColorChange(cal.id, c); closeContextMenu(); }}
+                allowCustom
+              />
+            </div>
+          </ContextMenuSubMenu>
+        )}
+        {showSeparator && <ContextMenuSeparator />}
+        {canClear && (
+          <ContextMenuItem
+            icon={Eraser}
+            label={tMgmt('clear_events')}
+            onClick={() => { closeContextMenu(); onClearCalendar(cal); }}
+          />
+        )}
+        {canDelete && (
+          <ContextMenuItem
+            icon={Trash2}
+            label={tMgmt('delete')}
+            onClick={() => { closeContextMenu(); onDeleteCalendar(cal); }}
+            destructive
+          />
+        )}
+      </ContextMenu>
+    );
+  };
+
   return (
     <div className="mt-4">
       {enableCalendarTasks && (
@@ -250,9 +257,22 @@ export function CalendarSidebarPanel({
           )}
         </button>
       )}
-      <h3 className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-2 px-1">
-        {t("my_calendars")}
-      </h3>
+      <div className="flex items-center justify-between mb-2 px-1 group">
+        {onCreateCalendar ? (
+          <button
+            onClick={onCreateCalendar}
+            className="text-xs font-medium text-muted-foreground uppercase tracking-wider hover:text-foreground transition-colors flex items-center gap-1.5"
+            title={tMgmt('add_calendar')}
+          >
+            {t('my_calendars')}
+            <Plus className="w-3 h-3 opacity-0 group-hover:opacity-100 transition-opacity" />
+          </button>
+        ) : (
+          <h3 className="text-xs font-medium text-muted-foreground uppercase tracking-wider">
+            {t('my_calendars')}
+          </h3>
+        )}
+      </div>
       <div className="space-y-0.5">
         {personalCalendars.map(renderCalendarItem)}
       </div>
@@ -268,6 +288,8 @@ export function CalendarSidebarPanel({
           </div>
         </div>
       ))}
+
+      {renderCalendarMenu()}
     </div>
   );
 }

components/calendar/calendar-toolbar.tsx

@@ -260,6 +260,9 @@ export function CalendarToolbar({
       {/* ── DESKTOP TOOLBAR ── */}
       {!isMobile && (
         <div className="flex items-center gap-1">
+          <Button variant="outline" size="sm" onClick={onToday} className="h-8 mr-1">
+            {t("views.today")}
+          </Button>
           <Button variant="ghost" size="icon" className="h-8 w-8" onClick={onPrev} aria-label={t("nav_prev")}>
             <ChevronLeft className="w-4 h-4" />
           </Button>
@@ -279,14 +282,14 @@ export function CalendarToolbar({
       <div className="flex-1" />
 
       {!isMobile && (
-        <div className="flex border border-border rounded-md overflow-hidden">
+        <div className="flex h-8 border border-border rounded-md overflow-hidden">
           {views.map((v) => (
             <button
               key={v}
               onClick={() => onViewModeChange(v)}
               title={t(`views.${v}_hint`)}
               className={cn(
-                "px-3 py-1.5 text-xs font-medium transition-colors",
+                "inline-flex items-center px-3 text-xs font-medium transition-colors",
                 v === viewMode
                   ? "bg-primary text-primary-foreground"
                   : "hover:bg-muted text-muted-foreground"
@@ -300,7 +303,7 @@ export function CalendarToolbar({
 
       {(onImport || onSubscribe) && !isMobile && (
         <div className="relative" ref={importDropdownRef}>
-          <Button variant="outline" size="sm" onClick={() => setShowImportDropdown((v) => !v)}>
+          <Button variant="outline" size="sm" className="h-8" onClick={() => setShowImportDropdown((v) => !v)}>
             <Upload className="w-4 h-4 mr-1" />
             {t("import.title")}
             <ChevronDown className="w-3 h-3 ml-1" />
@@ -331,7 +334,7 @@ export function CalendarToolbar({
       )}
 
       {!isMobile && (
-        <Button size="sm" onClick={onCreateEvent} data-tour="create-event-button">
+        <Button size="sm" className="h-8" onClick={onCreateEvent} data-tour="create-event-button">
           <Plus className="w-4 h-4 mr-1" />
           {t("events.create")}
         </Button>

components/calendar/calendar-week-view.tsx

@@ -23,6 +23,7 @@ interface CalendarWeekViewProps {
   onHoverEvent?: (event: CalendarEvent, anchorRect: DOMRect) => void;
   onHoverLeave?: () => void;
   onContextMenuEvent?: (e: React.MouseEvent, event: CalendarEvent) => void;
+  onContextMenuEmpty?: (e: React.MouseEvent, date: Date, hour?: number, allDayArea?: boolean) => void;
   onCreateAtTime: (date: Date, endDate?: Date) => void;
   firstDayOfWeek?: number;
   timeFormat?: "12h" | "24h";
@@ -44,6 +45,7 @@ export function CalendarWeekView({
   onHoverEvent,
   onHoverLeave,
   onContextMenuEvent,
+  onContextMenuEmpty,
   onCreateAtTime,
   firstDayOfWeek = 1,
   timeFormat = "24h",
@@ -183,6 +185,7 @@ export function CalendarWeekView({
       created: t("notifications.event_created"),
       error: t("notifications.event_error"),
     },
+    isMobile,
   });
 
   const formatHour = (h: number): string => {
@@ -218,7 +221,11 @@ export function CalendarWeekView({
             style={{ minHeight: Math.max(28, (allDayRowCount + taskRowCount) * 24 + 4) }}
           >
             {weekDays.map((day) => (
-              <div key={format(day, "yyyy-MM-dd")} className="bg-background min-h-[28px]" />
+              <div
+                key={format(day, "yyyy-MM-dd")}
+                className="bg-background min-h-[28px]"
+                onContextMenu={onContextMenuEmpty ? (e) => onContextMenuEmpty(e, day, undefined, true) : undefined}
+              />
             ))}
 
             <div className="absolute inset-0 pointer-events-none">
@@ -377,6 +384,7 @@ export function CalendarWeekView({
                       aria-label={`${intlFormatter.dateTime(day, { weekday: "short" })} ${formatHour(h)}`}
                       onClick={() => handleSlotClick(day, h)}
                       onDoubleClick={() => handleSlotDoubleClick(day, h)}
+                      onContextMenu={onContextMenuEmpty ? (e) => onContextMenuEmpty(e, day, h, false) : undefined}
                       className="border-b border-border/50 hover:bg-muted/30 cursor-pointer transition-colors"
                       style={{ height: HOUR_HEIGHT }}
                     />
@@ -384,9 +392,11 @@ export function CalendarWeekView({
 
                   {layouted.map(({ event: ev, column, totalColumns, startMinutes, endMinutes }) => {
                     const durMin = Math.max(15, endMinutes - startMinutes);
-                    const top = (startMinutes / 60) * HOUR_HEIGHT;
+                    const baseTop = (startMinutes / 60) * HOUR_HEIGHT;
                     const baseHeight = Math.max(20, (durMin / 60) * HOUR_HEIGHT);
-                    const height = resizeVisual?.eventId === ev.id ? resizeVisual.heightPx : baseHeight;
+                    const isResizing = resizeVisual?.eventId === ev.id;
+                    const top = isResizing ? resizeVisual!.topPx : baseTop;
+                    const height = isResizing ? resizeVisual!.heightPx : baseHeight;
                     const calId = getPrimaryCalendarId(ev);
                     const leftPct = (column / totalColumns) * 100;
                     const widthPct = (1 / totalColumns) * 100;
@@ -408,11 +418,21 @@ export function CalendarWeekView({
                           onContextMenu={onContextMenuEvent}
                           draggable
                         />
+                        <div
+                          data-resize-handle
+                          className="absolute top-0 left-1 right-1 h-3 cursor-n-resize z-20 flex items-start justify-center opacity-0 group-hover/event:opacity-100 transition-opacity"
+                          aria-label={t("events.resize")}
+                          onPointerDown={(e) => handleResizePointerDown(ev.id, "top", startMinutes, durMin, e)}
+                          onPointerMove={handleResizePointerMove}
+                          onPointerUp={handleResizePointerUp}
+                        >
+                          <div className="w-8 h-1 rounded-full bg-foreground/30 mt-0.5" />
+                        </div>
                         <div
                           data-resize-handle
                           className="absolute bottom-0 left-1 right-1 h-3 cursor-s-resize z-20 flex items-end justify-center opacity-0 group-hover/event:opacity-100 transition-opacity"
                           aria-label={t("events.resize")}
-                          onPointerDown={(e) => handleResizePointerDown(ev.id, durMin, e)}
+                          onPointerDown={(e) => handleResizePointerDown(ev.id, "bottom", startMinutes, durMin, e)}
                           onPointerMove={handleResizePointerMove}
                           onPointerUp={handleResizePointerUp}
                         >

components/calendar/create-calendar-modal.tsx

@@ -0,0 +1,151 @@
+"use client";
+
+import { useCallback, useEffect, useRef, useState } from "react";
+import { useTranslations } from "next-intl";
+import { Button } from "@/components/ui/button";
+import { X, Loader2, Calendar as CalendarIcon } from "lucide-react";
+import type { IJMAPClient } from "@/lib/jmap/client-interface";
+import { useCalendarStore } from "@/stores/calendar-store";
+import { CalendarColorPicker } from "@/components/settings/calendar-management-settings";
+import { toast } from "@/stores/toast-store";
+
+interface CreateCalendarModalProps {
+  client: IJMAPClient;
+  onClose: () => void;
+}
+
+export function CreateCalendarModal({ client, onClose }: CreateCalendarModalProps) {
+  const t = useTranslations("calendar.management");
+  const tCommon = useTranslations("common");
+  const createCalendar = useCalendarStore((s) => s.createCalendar);
+
+  const [name, setName] = useState("");
+  const [color, setColor] = useState("#3b82f6");
+  const [isSubmitting, setIsSubmitting] = useState(false);
+  const modalRef = useRef<HTMLDivElement>(null);
+
+  const isValid = name.trim().length > 0;
+
+  const handleSubmit = useCallback(async () => {
+    const trimmed = name.trim();
+    if (!trimmed) return;
+    setIsSubmitting(true);
+    try {
+      const created = await createCalendar(client, { name: trimmed, color });
+      if (created) {
+        toast.success(t("calendar_created"));
+        onClose();
+      } else {
+        toast.error(t("error_create"));
+      }
+    } catch {
+      toast.error(t("error_create"));
+    } finally {
+      setIsSubmitting(false);
+    }
+  }, [name, color, client, createCalendar, onClose, t]);
+
+  useEffect(() => {
+    const handleKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape" && !isSubmitting) onClose();
+    };
+    window.addEventListener("keydown", handleKey);
+    return () => window.removeEventListener("keydown", handleKey);
+  }, [onClose, isSubmitting]);
+
+  useEffect(() => {
+    const modal = modalRef.current;
+    if (!modal) return;
+    const focusableEls = modal.querySelectorAll<HTMLElement>(
+      'input, select, textarea, button, [tabindex]:not([tabindex="-1"])'
+    );
+    const firstEl = focusableEls[0];
+    const lastEl = focusableEls[focusableEls.length - 1];
+
+    const handler = (e: KeyboardEvent) => {
+      if (e.key !== "Tab") return;
+      if (e.shiftKey && document.activeElement === firstEl) {
+        e.preventDefault();
+        lastEl?.focus();
+      } else if (!e.shiftKey && document.activeElement === lastEl) {
+        e.preventDefault();
+        firstEl?.focus();
+      }
+    };
+    modal.addEventListener("keydown", handler);
+    firstEl?.focus();
+    return () => modal.removeEventListener("keydown", handler);
+  }, []);
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center">
+      <div
+        className="absolute inset-0 bg-black/50 backdrop-blur-[1px]"
+        onClick={() => !isSubmitting && onClose()}
+        aria-hidden="true"
+      />
+      <div
+        ref={modalRef}
+        role="dialog"
+        aria-modal="true"
+        aria-label={t("add_calendar")}
+        className="relative bg-background border border-border rounded-lg shadow-xl w-full max-w-md mx-4 animate-in zoom-in-95 duration-200"
+      >
+        <div className="flex items-center justify-between px-6 py-4 border-b border-border">
+          <div className="flex items-center gap-2">
+            <CalendarIcon className="w-5 h-5 text-primary" />
+            <h2 className="text-lg font-semibold">{t("add_calendar")}</h2>
+          </div>
+          <button
+            onClick={onClose}
+            disabled={isSubmitting}
+            className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground disabled:opacity-50"
+            aria-label={tCommon("close")}
+          >
+            <X className="w-5 h-5" />
+          </button>
+        </div>
+
+        <div className="px-6 py-4 space-y-4">
+          <div>
+            <label className="text-xs font-medium text-muted-foreground mb-1 block">
+              {t("name")}
+            </label>
+            <input
+              type="text"
+              value={name}
+              onChange={(e) => setName(e.target.value)}
+              placeholder={t("name_placeholder")}
+              className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
+              disabled={isSubmitting}
+              onKeyDown={(e) => { if (e.key === "Enter" && isValid) handleSubmit(); }}
+            />
+          </div>
+
+          <div>
+            <label className="text-xs font-medium text-muted-foreground mb-1 block">
+              {t("color")}
+            </label>
+            <CalendarColorPicker value={color} onChange={setColor} allowCustom />
+          </div>
+        </div>
+
+        <div className="flex items-center justify-end gap-2 px-6 py-4 border-t border-border">
+          <Button variant="outline" onClick={onClose} disabled={isSubmitting}>
+            {tCommon("cancel")}
+          </Button>
+          <Button onClick={handleSubmit} disabled={!isValid || isSubmitting}>
+            {isSubmitting ? (
+              <>
+                <Loader2 className="w-4 h-4 animate-spin mr-2" />
+                {tCommon("loading")}
+              </>
+            ) : (
+              t("create")
+            )}
+          </Button>
+        </div>
+      </div>
+    </div>
+  );
+}

components/calendar/empty-space-context-menu.tsx

@@ -0,0 +1,67 @@
+"use client";
+
+import { useTranslations } from "next-intl";
+import {
+  ContextMenu,
+  ContextMenuItem,
+  ContextMenuSeparator,
+} from "@/components/ui/context-menu";
+import { Plus, CalendarDays, CheckSquare, Clock } from "lucide-react";
+
+interface Position {
+  x: number;
+  y: number;
+}
+
+interface EmptySpaceContextMenuProps {
+  position: Position;
+  isOpen: boolean;
+  onClose: () => void;
+  menuRef: React.RefObject<HTMLDivElement | null>;
+  onNewEvent: () => void;
+  onNewAllDayEvent: () => void;
+  onNewTask?: () => void;
+  onGoToToday: () => void;
+  showAllDayOption?: boolean;
+}
+
+export function EmptySpaceContextMenu({
+  position,
+  isOpen,
+  onClose,
+  menuRef,
+  onNewEvent,
+  onNewAllDayEvent,
+  onNewTask,
+  onGoToToday,
+  showAllDayOption = true,
+}: EmptySpaceContextMenuProps) {
+  const t = useTranslations("calendar");
+
+  const handle = (fn: () => void) => () => {
+    fn();
+    onClose();
+  };
+
+  return (
+    <ContextMenu ref={menuRef} isOpen={isOpen} position={position} onClose={onClose}>
+      <ContextMenuItem icon={Plus} label={t("events.new_event")} onClick={handle(onNewEvent)} />
+      {showAllDayOption && (
+        <ContextMenuItem
+          icon={CalendarDays}
+          label={t("events.new_all_day_event")}
+          onClick={handle(onNewAllDayEvent)}
+        />
+      )}
+      {onNewTask && (
+        <ContextMenuItem
+          icon={CheckSquare}
+          label={t("events.new_task")}
+          onClick={handle(onNewTask)}
+        />
+      )}
+      <ContextMenuSeparator />
+      <ContextMenuItem icon={Clock} label={t("events.go_to_today")} onClick={handle(onGoToToday)} />
+    </ContextMenu>
+  );
+}

components/calendar/event-detail-popover.tsx

@@ -19,6 +19,7 @@ import {
   getUserStatus,
   getParticipantList,
 } from "@/lib/calendar-participants";
+import { useFormatEventDate } from "@/hooks/use-format-event-date";
 
 interface EventDetailPopoverProps {
   event: CalendarEvent;
@@ -253,6 +254,8 @@ export function EventDetailPopover({
 
   const hasParticipants = participants.length > 0;
 
+  const formatEventDate = useFormatEventDate();
+
   const popover = (
     <div
       ref={popoverRef}
@@ -329,7 +332,7 @@ export function EventDetailPopover({
           <Clock className="w-4 h-4 text-muted-foreground mt-0.5 flex-shrink-0" />
           <div className="text-sm">
             <span className="font-medium text-foreground">
-              {format(startDate, "EEE, MMM d, yyyy")}
+              {formatEventDate(startDate)}
             </span>
             {event.showWithoutTime ? (
               <span className="text-muted-foreground ml-1.5">{t("events.all_day")}</span>

components/calendar/event-modal.tsx

@@ -21,6 +21,7 @@ import {
 import { PluginSlot } from "@/components/plugins/plugin-slot";
 import { useSettingsStore } from "@/stores/settings-store";
 import { generateUUID } from "@/lib/utils";
+import { useFormatEventDate } from "@/hooks/use-format-event-date";
 
 export interface PendingEventPreview {
   start: Date;
@@ -35,6 +36,8 @@ interface EventModalProps {
   calendars: Calendar[];
   defaultDate?: Date;
   defaultEndDate?: Date;
+  defaultAllDay?: boolean;
+  defaultCalendarId?: string;
   onSave: (data: Partial<CalendarEvent>, sendSchedulingMessages?: boolean) => void | Promise<void>;
   onDelete?: (id: string, sendSchedulingMessages?: boolean) => void;
   onDuplicate?: (data: Partial<CalendarEvent>) => void;
@@ -113,6 +116,8 @@ export function EventModal({
   calendars,
   defaultDate,
   defaultEndDate,
+  defaultAllDay,
+  defaultCalendarId,
   onSave,
   onDelete,
   onDuplicate,
@@ -126,6 +131,7 @@ export function EventModal({
   const timeFormat = useSettingsStore((s) => s.timeFormat);
   const timeDisplayFmt = timeFormat === "12h" ? "h:mm a" : "HH:mm";
   const isEdit = !!event;
+  const formatEventDate = useFormatEventDate();
   const [mode, setMode] = useState<"view" | "edit">(isEdit ? "view" : "edit");
 
   const userIsOrganizer = useMemo(() => {
@@ -197,9 +203,10 @@ export function EventModal({
   const [startTime, setStartTime] = useState(formatTimeInput(getInitialStart()));
   const [endDate, setEndDate] = useState(formatDateInput(getInitialEnd()));
   const [endTime, setEndTime] = useState(formatTimeInput(getInitialEnd()));
-  const [allDay, setAllDay] = useState(event?.showWithoutTime || false);
+  const [allDay, setAllDay] = useState(event?.showWithoutTime || defaultAllDay || false);
   const [calendarId, setCalendarId] = useState<string>(() => {
     if (event?.calendarIds) return getPrimaryCalendarId(event) || calendars[0]?.id || "";
+    if (defaultCalendarId && calendars.some(c => c.id === defaultCalendarId)) return defaultCalendarId;
     const defaultCal = calendars.find(c => c.isDefault);
     return defaultCal?.id || calendars[0]?.id || "";
   });
@@ -490,14 +497,14 @@ export function EventModal({
 
     return (
       <div ref={modalRef} role="dialog" aria-modal={isMobile || undefined} aria-label={event.title || t("events.no_title")} className={isMobile ? "fixed inset-0 z-50 flex flex-col bg-background" : "flex flex-col h-full bg-background"}>
-          <div className="flex items-center justify-between px-6 py-4 border-b border-border flex-shrink-0">
-            <h2 className="text-lg font-semibold truncate">{event.title || t("events.no_title")}</h2>
-            <button onClick={onClose} className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground" aria-label={t("form.cancel")}>
-              <X className="w-5 h-5" />
-            </button>
-          </div>
+        <div className="flex items-center justify-between px-6 py-4 border-b border-border flex-shrink-0">
+          <h2 className="text-lg font-semibold truncate">{event.title || t("events.no_title")}</h2>
+          <button onClick={onClose} className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground" aria-label={t("form.cancel")}>
+            <X className="w-5 h-5" />
+          </button>
+        </div>
 
-          <div className="flex-1 overflow-y-auto">
+        <div className="flex-1 overflow-y-auto">
           <div className="px-6 py-4 space-y-3">
             <div className="flex items-start gap-3 rounded-lg border border-blue-200 dark:border-blue-800 bg-blue-50 dark:bg-blue-950/50 px-4 py-3">
               <CalendarDays className="w-5 h-5 text-blue-600 dark:text-blue-400 mt-0.5 flex-shrink-0" />
@@ -512,7 +519,7 @@ export function EventModal({
             </div>
 
             <div className="text-sm">
-              <span className="font-medium">{format(startD, "EEE, MMM d, yyyy")}</span>
+              <span className="font-medium">{formatEventDate(startD)}</span>
               {!event.showWithoutTime && (
                 <span className="text-muted-foreground ml-2">
                   {format(startD, timeDisplayFmt)} – {format(endD, timeDisplayFmt)}
@@ -545,48 +552,48 @@ export function EventModal({
               </div>
             )}
           </div>
-          </div>
+        </div>
 
-          <div className="px-6 py-4 border-t border-border flex-shrink-0">
-            <div className="flex items-center justify-between">
-              <span className="text-sm font-medium">{t("participants.rsvp_label")}</span>
-              <div className="flex gap-2">
-                <Button
-                  size="sm"
-                  variant={userCurrentStatus === "accepted" ? "default" : "outline"}
-                  onClick={() => handleRsvp("accepted")}
-                  className={userCurrentStatus === "accepted"
-                    ? "bg-success hover:bg-success/80 text-success-foreground"
-                    : "text-success border-success/30 hover:bg-success/10"}
-                >
-                  {userCurrentStatus === "accepted" && <Check className="w-4 h-4 mr-1" />}
-                  {t("participants.accepted")}
-                </Button>
-                <Button
-                  size="sm"
-                  variant={userCurrentStatus === "tentative" ? "default" : "outline"}
-                  onClick={() => handleRsvp("tentative")}
-                  className={userCurrentStatus === "tentative"
-                    ? "bg-warning hover:bg-warning/80 text-warning-foreground"
-                    : "border border-warning/30 text-warning hover:bg-warning/10"}
-                >
-                  {userCurrentStatus === "tentative" && <Check className="w-4 h-4 mr-1" />}
-                  {t("participants.tentative")}
-                </Button>
-                <Button
-                  size="sm"
-                  variant={userCurrentStatus === "declined" ? "default" : "ghost"}
-                  onClick={() => handleRsvp("declined")}
-                  className={userCurrentStatus === "declined"
-                    ? "bg-destructive hover:bg-destructive/80 text-destructive-foreground"
-                    : "text-destructive hover:bg-destructive/10"}
-                >
-                  {userCurrentStatus === "declined" && <Check className="w-4 h-4 mr-1" />}
-                  {t("participants.declined")}
-                </Button>
-              </div>
+        <div className="px-6 py-4 border-t border-border flex-shrink-0">
+          <div className="flex items-center justify-between">
+            <span className="text-sm font-medium">{t("participants.rsvp_label")}</span>
+            <div className="flex gap-2">
+              <Button
+                size="sm"
+                variant={userCurrentStatus === "accepted" ? "default" : "outline"}
+                onClick={() => handleRsvp("accepted")}
+                className={userCurrentStatus === "accepted"
+                  ? "bg-success hover:bg-success/80 text-success-foreground"
+                  : "text-success border-success/30 hover:bg-success/10"}
+              >
+                {userCurrentStatus === "accepted" && <Check className="w-4 h-4 mr-1" />}
+                {t("participants.accepted")}
+              </Button>
+              <Button
+                size="sm"
+                variant={userCurrentStatus === "tentative" ? "default" : "outline"}
+                onClick={() => handleRsvp("tentative")}
+                className={userCurrentStatus === "tentative"
+                  ? "bg-warning hover:bg-warning/80 text-warning-foreground"
+                  : "border border-warning/30 text-warning hover:bg-warning/10"}
+              >
+                {userCurrentStatus === "tentative" && <Check className="w-4 h-4 mr-1" />}
+                {t("participants.tentative")}
+              </Button>
+              <Button
+                size="sm"
+                variant={userCurrentStatus === "declined" ? "default" : "ghost"}
+                onClick={() => handleRsvp("declined")}
+                className={userCurrentStatus === "declined"
+                  ? "bg-destructive hover:bg-destructive/80 text-destructive-foreground"
+                  : "text-destructive hover:bg-destructive/10"}
+              >
+                {userCurrentStatus === "declined" && <Check className="w-4 h-4 mr-1" />}
+                {t("participants.declined")}
+              </Button>
             </div>
           </div>
+        </div>
       </div>
     );
   }
@@ -633,7 +640,7 @@ export function EventModal({
               <Clock className="w-4 h-4 text-muted-foreground mt-0.5 flex-shrink-0" />
               <div className="text-sm">
                 <span className="font-medium text-foreground">
-                  {format(startD, "EEE, MMM d, yyyy")}
+                  {formatEventDate(startD)}
                 </span>
                 {event.showWithoutTime ? (
                   <span className="text-muted-foreground ml-1.5">{t("events.all_day")}</span>
@@ -762,16 +769,16 @@ export function EventModal({
 
   return (
     <div ref={modalRef} role="dialog" aria-modal={isMobile || undefined} aria-label={isEdit ? t("events.edit") : t("events.create")} data-tour="event-modal" className={isMobile ? "fixed inset-0 z-50 flex flex-col bg-background" : "flex flex-col h-full bg-background"}>
-        <div className="flex items-center justify-between px-6 py-4 border-b border-border flex-shrink-0">
-          <h2 className="text-lg font-semibold">
-            {isEdit ? t("events.edit") : t("events.create")}
-          </h2>
-          <button onClick={onClose} className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground" aria-label={t("form.cancel")}>
-            <X className="w-5 h-5" />
-          </button>
-        </div>
+      <div className="flex items-center justify-between px-6 py-4 border-b border-border flex-shrink-0">
+        <h2 className="text-lg font-semibold">
+          {isEdit ? t("events.edit") : t("events.create")}
+        </h2>
+        <button onClick={onClose} className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground" aria-label={t("form.cancel")}>
+          <X className="w-5 h-5" />
+        </button>
+      </div>
 
-        <div className="flex-1 overflow-y-auto">
+      <div className="flex-1 overflow-y-auto">
         <div className="px-6 py-4 space-y-4">
           <div>
             <label className="text-sm font-medium mb-1 block">{t("form.title")}</label>
@@ -981,69 +988,69 @@ export function EventModal({
             </div>
           )}
         </div>
-        </div>
+      </div>
 
-        <div className="flex items-center justify-between px-6 py-4 border-t border-border flex-shrink-0">
-          <div className="flex items-center gap-1">
-            {isEdit && onDelete && (
-              showDeleteConfirm ? (
-                <div className="flex items-center gap-2">
-                  <div>
-                    <span className="text-sm text-red-600 dark:text-red-400">
-                      {t("form.delete_confirm")}
-                    </span>
-                    {hasParticipants && (
-                      <p className="text-xs text-muted-foreground mt-0.5">
-                        {t("participants.cancel_notification")}
-                      </p>
-                    )}
-                  </div>
-                  <Button
-                    variant="outline"
-                    size="sm"
-                    onClick={() => { onDelete(event!.id, hasParticipants || undefined); onClose(); }}
-                    className="text-red-600 dark:text-red-400 border-red-300 dark:border-red-700"
-                  >
-                    {t("events.delete")}
-                  </Button>
-                  <Button variant="ghost" size="sm" onClick={() => setShowDeleteConfirm(false)}>
-                    {t("form.cancel")}
-                  </Button>
+      <div className="flex items-center justify-between px-6 py-4 border-t border-border flex-shrink-0">
+        <div className="flex items-center gap-1">
+          {isEdit && onDelete && (
+            showDeleteConfirm ? (
+              <div className="flex items-center gap-2">
+                <div>
+                  <span className="text-sm text-red-600 dark:text-red-400">
+                    {t("form.delete_confirm")}
+                  </span>
+                  {hasParticipants && (
+                    <p className="text-xs text-muted-foreground mt-0.5">
+                      {t("participants.cancel_notification")}
+                    </p>
+                  )}
                 </div>
-              ) : (
                 <Button
-                  variant="ghost"
+                  variant="outline"
                   size="sm"
-                  onClick={() => setShowDeleteConfirm(true)}
-                  className="text-red-600 dark:text-red-400"
+                  onClick={() => { onDelete(event!.id, hasParticipants || undefined); onClose(); }}
+                  className="text-red-600 dark:text-red-400 border-red-300 dark:border-red-700"
                 >
-                  <Trash2 className="w-4 h-4 mr-1" />
                   {t("events.delete")}
                 </Button>
-              )
-            )}
-            {isEdit && onDuplicate && !showDeleteConfirm && (
+                <Button variant="ghost" size="sm" onClick={() => setShowDeleteConfirm(false)}>
+                  {t("form.cancel")}
+                </Button>
+              </div>
+            ) : (
               <Button
                 variant="ghost"
                 size="sm"
-                onClick={handleDuplicate}
-                aria-label={t("events.duplicate")}
+                onClick={() => setShowDeleteConfirm(true)}
+                className="text-red-600 dark:text-red-400"
               >
-                <Copy className="w-4 h-4 mr-1" />
-                {t("events.duplicate")}
+                <Trash2 className="w-4 h-4 mr-1" />
+                {t("events.delete")}
               </Button>
-            )}
-          </div>
-
-          <div className="flex gap-2">
-            <Button variant="outline" onClick={isEdit ? () => setMode("view") : onClose}>
-              {t("form.cancel")}
+            )
+          )}
+          {isEdit && onDuplicate && !showDeleteConfirm && (
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={handleDuplicate}
+              aria-label={t("events.duplicate")}
+            >
+              <Copy className="w-4 h-4 mr-1" />
+              {t("events.duplicate")}
             </Button>
-            <Button onClick={handleSave} disabled={!title.trim() || isSaving}>
-              {t("form.save")}
-            </Button>
-          </div>
+          )}
         </div>
+
+        <div className="flex gap-2">
+          <Button variant="outline" onClick={isEdit ? () => setMode("view") : onClose}>
+            {t("form.cancel")}
+          </Button>
+          <Button onClick={handleSave} disabled={!title.trim() || isSaving}>
+            {t("form.save")}
+          </Button>
+        </div>
+      </div>
     </div>
   );
 }

components/calendar/participant-input.tsx

@@ -90,13 +90,11 @@ export const ParticipantInput = forwardRef<ParticipantInputHandle, ParticipantIn
   }, [showSuggestions, activeIndex, suggestions, query, addParticipant]);
 
   const handleBlur = useCallback(() => {
-    setTimeout(() => {
-      setShowSuggestions(false);
-      const trimmed = query.trim();
-      if (trimmed && EMAIL_REGEX.test(trimmed)) {
-        addParticipant({ name: "", email: trimmed });
-      }
-    }, 200);
+    const trimmed = query.trim();
+    if (trimmed && EMAIL_REGEX.test(trimmed)) {
+      addParticipant({ name: "", email: trimmed });
+    }
+    setTimeout(() => setShowSuggestions(false), 200);
   }, [query, addParticipant]);
 
   useImperativeHandle(ref, () => ({
@@ -167,7 +165,22 @@ export const ParticipantInput = forwardRef<ParticipantInputHandle, ParticipantIn
               key={`${p.email}-${i}`}
               className="inline-flex items-center gap-1 px-2 py-1 text-xs rounded-full bg-muted text-foreground max-w-[200px]"
             >
-              <span className="truncate">{p.name || p.email}</span>
+              {!disabled ? (
+                <button
+                  type="button"
+                  onClick={() => {
+                    onRemove(p.email);
+                    setQuery(p.email);
+                    setTimeout(() => inputRef.current?.focus(), 0);
+                  }}
+                  className="truncate hover:underline focus:outline-none focus:underline cursor-text"
+                  aria-label={`${t("edit")} ${p.name || p.email}`}
+                >
+                  {p.name || p.email}
+                </button>
+              ) : (
+                <span className="truncate">{p.name || p.email}</span>
+              )}
               {!disabled && (
                 <button
                   type="button"

components/contacts/__tests__/contact-detail.test.tsx

@@ -60,10 +60,8 @@ describe('ContactDetail', () => {
   it('calls onDelete when delete button is clicked', () => {
     const onDelete = vi.fn();
     render(<ContactDetail contact={contact} onEdit={vi.fn()} onDelete={onDelete} />);
-    const deleteButton = screen.getAllByRole('button').find(
-      btn => btn.className.includes('text-red')
-    );
-    fireEvent.click(deleteButton!);
+    fireEvent.click(screen.getByLabelText('detail.more_actions'));
+    fireEvent.click(screen.getByRole('menuitem', { name: /context_menu\.delete/ }));
     expect(onDelete).toHaveBeenCalledOnce();
   });
 });

components/contacts/__tests__/contact-list.test.tsx

@@ -36,7 +36,6 @@ const defaultProps = {
   onSearchChange: vi.fn(),
   onSelectContact: vi.fn(),
   onCreateNew: vi.fn(),
-  categoryLabel: 'All Contacts',
   selectedContactIds: new Set<string>(),
   onToggleSelection: vi.fn(),
   onSelectRangeContacts: vi.fn(),
@@ -79,8 +78,4 @@ describe('ContactList', () => {
     expect(screen.getByText('bulk.export')).toBeInTheDocument();
   });
 
-  it('shows category label with count', () => {
-    render(<ContactList {...defaultProps} />);
-    expect(screen.getByText('All Contacts (2)')).toBeInTheDocument();
-  });
 });

components/contacts/contact-activity.tsx

@@ -2,12 +2,13 @@
 
 import { useEffect, useState } from "react";
 import { useTranslations, useFormatter } from "next-intl";
-import { Mail, CalendarDays, Loader2 } from "lucide-react";
+import { Loader2 } from "lucide-react";
 import { useRouter } from "@/i18n/navigation";
 import { useAuthStore } from "@/stores/auth-store";
 import { useEmailStore } from "@/stores/email-store";
 import { useCalendarStore } from "@/stores/calendar-store";
-import { cn } from "@/lib/utils";
+import { Avatar } from "@/components/ui/avatar";
+import { Section } from "./contact-detail";
 import type { ContactCard, Email, CalendarEvent } from "@/lib/jmap/types";
 
 const EMAIL_LIMIT = 5;
@@ -43,14 +44,15 @@ function buildEmailFilter(addresses: string[]): Record<string, unknown> {
 }
 
 function eventInvolvesContact(event: CalendarEvent, addresses: Set<string>): boolean {
-  if (!event.participants) return false;
-  for (const p of Object.values(event.participants)) {
-    const email = p.email?.trim().toLowerCase();
-    if (email && addresses.has(email)) return true;
-    if (p.sendTo) {
-      for (const target of Object.values(p.sendTo)) {
-        const m = typeof target === "string" ? target.match(/mailto:(.+)/i) : null;
-        if (m && addresses.has(m[1].trim().toLowerCase())) return true;
+  if (event.participants) {
+    for (const p of Object.values(event.participants)) {
+      const email = p.email?.trim().toLowerCase();
+      if (email && addresses.has(email)) return true;
+      if (p.sendTo) {
+        for (const target of Object.values(p.sendTo)) {
+          const m = typeof target === "string" ? target.match(/mailto:(.+)/i) : null;
+          if (m && addresses.has(m[1].trim().toLowerCase())) return true;
+        }
       }
     }
   }
@@ -62,6 +64,26 @@ function eventInvolvesContact(event: CalendarEvent, addresses: Set<string>): boo
   return false;
 }
 
+function getEmailSender(email: Email): { name: string; address: string } {
+  const from = email.from?.[0];
+  return {
+    name: from?.name?.trim() || from?.email || "",
+    address: from?.email || "",
+  };
+}
+
+function groupEventsByDate(events: CalendarEvent[]): Map<string, CalendarEvent[]> {
+  const groups = new Map<string, CalendarEvent[]>();
+  for (const e of events) {
+    const d = new Date(e.start);
+    const key = isNaN(d.getTime()) ? e.start : d.toISOString().slice(0, 10);
+    const arr = groups.get(key) || [];
+    arr.push(e);
+    groups.set(key, arr);
+  }
+  return groups;
+}
+
 export function ContactActivity({ contact }: ContactActivityProps) {
   const t = useTranslations("contacts.activity");
   const format = useFormatter();
@@ -170,111 +192,115 @@ export function ContactActivity({ contact }: ContactActivityProps) {
       : { year: "numeric", month: "short", day: "numeric" });
   };
 
-  const formatEventDate = (event: CalendarEvent) => {
+  const formatEventTime = (event: CalendarEvent) => {
+    if (event.showWithoutTime) return t("all_day");
     const d = new Date(event.start);
-    if (isNaN(d.getTime())) return event.start;
-    if (event.showWithoutTime) {
-      return format.dateTime(d, { weekday: "short", month: "short", day: "numeric" });
-    }
-    return format.dateTime(d, {
-      weekday: "short",
-      month: "short",
-      day: "numeric",
-      hour: "numeric",
-      minute: "2-digit",
-    });
+    if (isNaN(d.getTime())) return "";
+    return format.dateTime(d, { hour: "numeric", minute: "2-digit" });
   };
 
+  const formatEventDateHeader = (isoDate: string) => {
+    const d = new Date(isoDate);
+    if (isNaN(d.getTime())) return isoDate;
+    const now = new Date();
+    const sameYear = d.getFullYear() === now.getFullYear();
+    return format.dateTime(d, sameYear
+      ? { weekday: "long", month: "long", day: "numeric" }
+      : { weekday: "long", year: "numeric", month: "long", day: "numeric" });
+  };
+
+  const eventGroups = events ? Array.from(groupEventsByDate(events).entries()) : [];
+
   return (
-    <>
-      <ActivitySection icon={Mail} title={t("recent_emails")}>
+    <div className="grid grid-cols-1 lg:grid-cols-2 lg:gap-x-8">
+      <Section title={t("recent_emails")}>
         {emailsLoading ? (
           <LoadingRow />
         ) : emailsError ? (
-          <p className="text-xs text-muted-foreground">{t("load_failed")}</p>
+          <p className="text-sm text-muted-foreground">{t("load_failed")}</p>
         ) : !emails || emails.length === 0 ? (
-          <p className="text-xs text-muted-foreground">{t("no_emails")}</p>
+          <p className="text-sm text-muted-foreground">{t("no_emails")}</p>
         ) : (
-          emails.map((email) => (
-            <button
-              key={email.id}
-              type="button"
-              onClick={() => handleOpenEmail(email)}
-              className="w-full text-left p-2 -mx-2 rounded-md hover:bg-muted/60 transition-colors touch-manipulation"
-            >
-              <div className="flex items-baseline justify-between gap-2">
-                <span className="text-sm font-medium truncate">
-                  {email.subject || t("no_subject")}
-                </span>
-                <span className="text-xs text-muted-foreground flex-shrink-0">
-                  {formatEmailDate(email.receivedAt)}
-                </span>
-              </div>
-              {email.preview && (
-                <p className="text-xs text-muted-foreground truncate mt-0.5">
-                  {email.preview}
-                </p>
-              )}
-            </button>
-          ))
+          <div className="-mx-2">
+            {emails.map((email) => {
+              const sender = getEmailSender(email);
+              return (
+                <button
+                  key={email.id}
+                  type="button"
+                  onClick={() => handleOpenEmail(email)}
+                  className="w-full text-left flex items-start gap-3 px-2 py-2 rounded-md hover:bg-muted/60 transition-colors touch-manipulation"
+                >
+                  <Avatar name={sender.name} email={sender.address} size="sm" />
+                  <div className="flex-1 min-w-0">
+                    <div className="flex items-baseline justify-between gap-2">
+                      <span className="text-sm font-medium truncate">
+                        {sender.name || t("unknown_sender")}
+                      </span>
+                      <span className="text-xs text-muted-foreground flex-shrink-0">
+                        {formatEmailDate(email.receivedAt)}
+                      </span>
+                    </div>
+                    <div className="text-sm truncate">
+                      {email.subject || t("no_subject")}
+                    </div>
+                    {email.preview && (
+                      <p className="text-xs text-muted-foreground truncate mt-0.5">
+                        {email.preview}
+                      </p>
+                    )}
+                  </div>
+                </button>
+              );
+            })}
+          </div>
         )}
-      </ActivitySection>
+      </Section>
 
-      <ActivitySection icon={CalendarDays} title={t("upcoming_events")}>
+      <Section title={t("upcoming_events")}>
         {eventsLoading ? (
           <LoadingRow />
         ) : eventsError ? (
-          <p className="text-xs text-muted-foreground">{t("load_failed")}</p>
+          <p className="text-sm text-muted-foreground">{t("load_failed")}</p>
         ) : !events || events.length === 0 ? (
-          <p className="text-xs text-muted-foreground">{t("no_events")}</p>
+          <p className="text-sm text-muted-foreground">{t("no_events")}</p>
         ) : (
-          events.map((event) => (
-            <button
-              key={event.id}
-              type="button"
-              onClick={() => handleOpenEvent(event)}
-              className="w-full text-left p-2 -mx-2 rounded-md hover:bg-muted/60 transition-colors touch-manipulation"
-            >
-              <div className="flex items-baseline justify-between gap-2">
-                <span className="text-sm font-medium truncate">
-                  {event.title || t("no_title")}
-                </span>
-                <span className="text-xs text-muted-foreground flex-shrink-0">
-                  {formatEventDate(event)}
-                </span>
+          <div className="space-y-4">
+            {eventGroups.map(([dateKey, group]) => (
+              <div key={dateKey}>
+                <div className="text-xs font-medium text-muted-foreground mb-1.5">
+                  {formatEventDateHeader(dateKey)}
+                </div>
+                <div className="-mx-2">
+                  {group.map((event) => (
+                    <button
+                      key={event.id}
+                      type="button"
+                      onClick={() => handleOpenEvent(event)}
+                      className="w-full text-left flex items-baseline gap-3 px-2 py-2 rounded-md hover:bg-muted/60 transition-colors touch-manipulation"
+                    >
+                      <span className="text-xs text-muted-foreground tabular-nums w-20 flex-shrink-0">
+                        {formatEventTime(event)}
+                      </span>
+                      <span className="text-sm truncate flex-1 min-w-0">
+                        {event.title || t("no_title")}
+                      </span>
+                    </button>
+                  ))}
+                </div>
               </div>
-            </button>
-          ))
+            ))}
+          </div>
         )}
-      </ActivitySection>
-    </>
-  );
-}
-
-function ActivitySection({
-  icon: Icon,
-  title,
-  children,
-}: {
-  icon: React.ComponentType<{ className?: string }>;
-  title: string;
-  children: React.ReactNode;
-}) {
-  return (
-    <div className={cn("rounded-lg border border-border bg-card p-4 border-l-[3px]", "border-l-rose-400 dark:border-l-rose-500")}>
-      <div className="flex items-center gap-2 mb-2.5">
-        <Icon className="w-4 h-4 text-muted-foreground" />
-        <h3 className="text-sm font-medium text-muted-foreground">{title}</h3>
-      </div>
-      <div className="space-y-1 pl-6">{children}</div>
+      </Section>
     </div>
   );
 }
 
 function LoadingRow() {
   return (
-    <div className="flex items-center gap-2 text-xs text-muted-foreground">
-      <Loader2 className="w-3.5 h-3.5 animate-spin" />
+    <div className="flex items-center gap-2 text-sm text-muted-foreground">
+      <Loader2 className="w-4 h-4 animate-spin" />
     </div>
   );
 }

components/contacts/contact-context-menu.tsx

@@ -11,16 +11,25 @@ import {
   Eye,
   Pencil,
   Mail,
+  Phone,
   ClipboardCopy,
   Download,
   Users,
   Trash2,
+  Copy,
+  Printer,
 } from "lucide-react";
 import type { ContactCard } from "@/lib/jmap/types";
 import { getContactPrimaryEmail } from "@/stores/contact-store";
 import { exportContact } from "./contact-export";
+import { printContact } from "./contact-print";
 import { toast } from "@/stores/toast-store";
 
+function getContactPrimaryPhone(contact: ContactCard): string {
+  if (!contact.phones) return "";
+  return Object.values(contact.phones)[0]?.number || "";
+}
+
 interface Position {
   x: number;
   y: number;
@@ -38,6 +47,7 @@ interface ContactContextMenuProps {
   onEdit: () => void;
   onDelete: () => void;
   onAddToGroup: () => void;
+  onDuplicate?: () => void;
   onBatchExport?: () => void;
   onBatchAddToGroup?: () => void;
   onBatchDelete?: () => void;
@@ -55,12 +65,14 @@ export function ContactContextMenu({
   onEdit,
   onDelete,
   onAddToGroup,
+  onDuplicate,
   onBatchExport,
   onBatchAddToGroup,
   onBatchDelete,
 }: ContactContextMenuProps) {
   const t = useTranslations("contacts");
   const email = getContactPrimaryEmail(contact);
+  const phone = getContactPrimaryPhone(contact);
   const showBatchActions = isMultiSelect && selectedCount > 1;
 
   const handle = (fn: () => void) => () => {
@@ -73,10 +85,15 @@ export function ContactContextMenu({
     window.location.href = `mailto:${email}`;
   };
 
-  const handleCopyEmail = async () => {
-    if (!email) return;
+  const handleCall = () => {
+    if (!phone) return;
+    window.location.href = `tel:${phone}`;
+  };
+
+  const handleCopy = async (value: string) => {
+    if (!value) return;
     try {
-      await navigator.clipboard.writeText(email);
+      await navigator.clipboard.writeText(value);
       toast.success(t("detail.copied"));
     } catch {
       toast.error(t("detail.copy_failed"));
@@ -88,6 +105,10 @@ export function ContactContextMenu({
     toast.success(t("export.success", { count: 1 }));
   };
 
+  const handlePrint = () => {
+    printContact(contact);
+  };
+
   if (showBatchActions) {
     return (
       <ContextMenu ref={menuRef} isOpen={isOpen} position={position} onClose={onClose}>
@@ -122,20 +143,34 @@ export function ContactContextMenu({
     <ContextMenu ref={menuRef} isOpen={isOpen} position={position} onClose={onClose}>
       <ContextMenuItem icon={Eye} label={t("context_menu.open")} onClick={handle(onOpen)} />
       <ContextMenuItem icon={Pencil} label={t("context_menu.edit")} onClick={handle(onEdit)} />
+      {(email || phone) && <ContextMenuSeparator />}
       {email && (
-        <>
-          <ContextMenuSeparator />
-          <ContextMenuItem
-            icon={Mail}
-            label={t("context_menu.send_email")}
-            onClick={handle(handleSendEmail)}
-          />
-          <ContextMenuItem
-            icon={ClipboardCopy}
-            label={t("detail.copy_email")}
-            onClick={handle(handleCopyEmail)}
-          />
-        </>
+        <ContextMenuItem
+          icon={Mail}
+          label={t("context_menu.send_email")}
+          onClick={handle(handleSendEmail)}
+        />
+      )}
+      {phone && (
+        <ContextMenuItem
+          icon={Phone}
+          label={t("context_menu.call")}
+          onClick={handle(handleCall)}
+        />
+      )}
+      {email && (
+        <ContextMenuItem
+          icon={ClipboardCopy}
+          label={t("detail.copy_email")}
+          onClick={handle(() => handleCopy(email))}
+        />
+      )}
+      {phone && (
+        <ContextMenuItem
+          icon={ClipboardCopy}
+          label={t("detail.copy_phone")}
+          onClick={handle(() => handleCopy(phone))}
+        />
       )}
       <ContextMenuSeparator />
       <ContextMenuItem
@@ -143,11 +178,23 @@ export function ContactContextMenu({
         label={t("context_menu.add_to_group")}
         onClick={handle(onAddToGroup)}
       />
+      {onDuplicate && (
+        <ContextMenuItem
+          icon={Copy}
+          label={t("context_menu.duplicate")}
+          onClick={handle(onDuplicate)}
+        />
+      )}
       <ContextMenuItem
         icon={Download}
         label={t("context_menu.export_vcard")}
         onClick={handle(handleExport)}
       />
+      <ContextMenuItem
+        icon={Printer}
+        label={t("context_menu.print")}
+        onClick={handle(handlePrint)}
+      />
       <ContextMenuSeparator />
       <ContextMenuItem
         icon={Trash2}

components/contacts/contact-detail.tsx

@@ -1,23 +1,37 @@
 "use client";
 
-import { useState, useEffect } from "react";
+import { useState, useEffect, useRef } from "react";
 import { useTranslations } from "next-intl";
-import { Mail, Phone, Building, MapPin, StickyNote, Pencil, Trash2, BookUser, Copy, Send, Globe, Cake, Tag, KeyRound, Users, Briefcase, Heart, Languages, Calendar, UserCircle, ShieldCheck, ShieldAlert, Download } from "lucide-react";
+import { Mail, Phone, Building, MapPin, StickyNote, Pencil, Trash2, BookUser, Copy, Send, Globe, Cake, KeyRound, Users, Briefcase, Heart, Languages, Calendar, UserCircle, ShieldCheck, ShieldAlert, Download, MoreHorizontal, Printer } from "lucide-react";
 import { Avatar } from "@/components/ui/avatar";
 import { Button } from "@/components/ui/button";
 import { cn } from "@/lib/utils";
 import type { ContactCard, AnniversaryDate, PartialDate } from "@/lib/jmap/types";
-import { getContactDisplayName, getContactPrimaryEmail } from "@/stores/contact-store";
+import { getContactDisplayName, getContactPrimaryEmail, getContactPhotoUri } from "@/stores/contact-store";
 import { ContactActivity } from "./contact-activity";
 import { useSmimeStore } from "@/stores/smime-store";
 import { parseCertificatePemOrDer, extractCertificateInfo } from "@/lib/smime/certificate-utils";
 import type { CertificateInfo } from "@/lib/smime/types";
 import { toast } from "@/stores/toast-store";
+import { exportContact } from "./contact-export";
+import { printContact } from "./contact-print";
+
+type MoreItem =
+  | {
+      icon: React.ComponentType<{ className?: string }>;
+      label: string;
+      onClick: () => void;
+      destructive?: boolean;
+      separator?: false;
+    }
+  | { separator: true };
 
 interface ContactDetailProps {
   contact: ContactCard | null;
   onEdit: () => void;
   onDelete: () => void;
+  onAddToGroup?: () => void;
+  onDuplicate?: () => void;
   isMobile?: boolean;
   className?: string;
 }
@@ -27,9 +41,45 @@ function formatPhoneFeatures(features?: Record<string, boolean>): string {
   return Object.keys(features).filter(k => features[k]).join(", ");
 }
 
+function getDateParts(dateInput: AnniversaryDate): { year?: number; month?: number; day?: number } {
+  if (typeof dateInput === "object" && dateInput !== null) {
+    if (dateInput["@type"] === "Timestamp" && typeof dateInput.utc === "string") {
+      const d = new Date(dateInput.utc);
+      if (!isNaN(d.getTime())) {
+        return { year: d.getUTCFullYear(), month: d.getUTCMonth() + 1, day: d.getUTCDate() };
+      }
+      return {};
+    }
+    const pd = dateInput as PartialDate;
+    return { year: pd.year, month: pd.month, day: pd.day };
+  }
+  const s = String(dateInput);
+  if (s.startsWith("--")) {
+    const parts = s.substring(2).split("-");
+    return { month: parseInt(parts[0], 10), day: parts[1] ? parseInt(parts[1], 10) : undefined };
+  }
+  const d = new Date(s);
+  if (!isNaN(d.getTime())) {
+    return { year: d.getFullYear(), month: d.getMonth() + 1, day: d.getDate() };
+  }
+  return {};
+}
+
+function getCompletedYears(dateInput: AnniversaryDate): number | null {
+  const { year, month, day } = getDateParts(dateInput);
+  if (!year) return null;
+  const now = new Date();
+  let years = now.getFullYear() - year;
+  const m = month ?? 1;
+  const d = day ?? 1;
+  const nowM = now.getMonth() + 1;
+  const nowD = now.getDate();
+  if (nowM < m || (nowM === m && nowD < d)) years -= 1;
+  if (years < 0) return null;
+  return years;
+}
+
 function formatDate(dateInput: AnniversaryDate): string {
-  // Handle RFC 9553 PartialDate objects: { year?, month?, day?, calendarScale? }
-  // Handle RFC 9553 Timestamp objects: { "@type": "Timestamp", utc: "..." }
   if (typeof dateInput === 'object' && dateInput !== null) {
     if (dateInput['@type'] === 'Timestamp' && typeof dateInput.utc === 'string') {
       try {
@@ -41,20 +91,15 @@ function formatDate(dateInput: AnniversaryDate): string {
       return String(dateInput.utc);
     }
     const pd = dateInput as PartialDate;
-    const year = pd.year;
-    const month = pd.month;
-    const day = pd.day;
     const monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
     const parts: string[] = [];
-    if (month && monthNames[month - 1]) parts.push(monthNames[month - 1]);
-    if (day) parts.push(String(day));
-    if (year) parts.push(String(year));
+    if (pd.month && monthNames[pd.month - 1]) parts.push(monthNames[pd.month - 1]);
+    if (pd.day) parts.push(String(pd.day));
+    if (pd.year) parts.push(String(pd.year));
     return parts.join(' ') || String(dateInput);
   }
   const dateStr = String(dateInput);
-  // Handle both ISO dates and partial dates like 1990-01-15 or --01-15
   if (dateStr.startsWith("--")) {
-    // Partial date without year
     const parts = dateStr.substring(2).split("-");
     const month = parseInt(parts[0], 10);
     const day = parts[1] ? parseInt(parts[1], 10) : undefined;
@@ -70,7 +115,7 @@ function formatDate(dateInput: AnniversaryDate): string {
   return dateStr;
 }
 
-export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }: ContactDetailProps) {
+export function ContactDetail({ contact, onEdit, onDelete, onAddToGroup, onDuplicate, isMobile, className }: ContactDetailProps) {
   const t = useTranslations("contacts");
   const smimeStore = useSmimeStore();
   const [parsedCerts, setParsedCerts] = useState<Map<number, CertificateInfo>>(new Map());
@@ -88,7 +133,6 @@ 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
             const commaIdx = key.uri.indexOf(',');
             if (commaIdx === -1) continue;
             const b64 = key.uri.substring(commaIdx + 1);
@@ -97,7 +141,6 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
             for (let j = 0; j < binary.length; j++) bytes[j] = binary.charCodeAt(j);
             derBytes = bytes.buffer;
           } else if (key.uri.startsWith('-----BEGIN')) {
-            // PEM-encoded certificate inline
             derBytes = key.uri;
           }
           if (!derBytes) continue;
@@ -128,6 +171,29 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
 
   const name = getContactDisplayName(contact);
   const email = getContactPrimaryEmail(contact);
+  const photoUri = getContactPhotoUri(contact);
+  const phone = contact.phones ? Object.values(contact.phones)[0]?.number : undefined;
+
+  const handleExport = () => {
+    exportContact(contact);
+    toast.success(t("export.success", { count: 1 }));
+  };
+
+  const handlePrint = () => {
+    printContact(contact, name);
+  };
+
+  const moreItems: MoreItem[] = [];
+  if (onAddToGroup) {
+    moreItems.push({ icon: Users, label: t("context_menu.add_to_group"), onClick: onAddToGroup });
+  }
+  if (onDuplicate) {
+    moreItems.push({ icon: Copy, label: t("context_menu.duplicate"), onClick: onDuplicate });
+  }
+  moreItems.push({ icon: Download, label: t("context_menu.export_vcard"), onClick: handleExport });
+  moreItems.push({ icon: Printer, label: t("context_menu.print"), onClick: handlePrint });
+  moreItems.push({ separator: true });
+  moreItems.push({ icon: Trash2, label: t("context_menu.delete"), onClick: onDelete, destructive: true });
   const emails = contact.emails ? Object.values(contact.emails) : [];
   const phones = contact.phones ? Object.values(contact.phones) : [];
   const orgs = contact.organizations ? Object.values(contact.organizations) : [];
@@ -171,257 +237,259 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
 
   const hasNickname = nicknames.length > 0;
   const titleLine = jobTitles.length > 0 ? jobTitles.map(t => t.name).join(", ") : undefined;
+  const subtitleParts = [titleLine, orgs[0]?.name].filter(Boolean) as string[];
+  const hasContactDetails = emails.length > 0 || phones.length > 0 || addresses.length > 0 || onlineServices.length > 0;
+  const hasWork = titles.length > 0 || orgs.length > 0;
+  const hasGender = !!(contact.speakToAs && (contact.speakToAs.grammaticalGender || contact.speakToAs.pronouns));
+  const hasPersonal = anniversaries.length > 0 || personalInfo.length > 0 || hasGender || preferredLanguages.length > 0;
 
   return (
     <div className={cn("flex flex-col h-full overflow-y-auto", className)}>
       <div className={cn("border-b border-border", isMobile ? "px-4 py-4" : "px-6 py-6")}>
         <div className={cn("flex gap-4", isMobile ? "flex-col" : "items-start justify-between")}>
-          <div className="flex items-center gap-4">
-            <Avatar name={name} email={email} size={isMobile ? "md" : "lg"} />
+          <div className="flex items-center gap-4 min-w-0 flex-1">
+            <Avatar name={name} email={email} contactPhotoUri={photoUri} size={isMobile ? "md" : "lg"} />
             <div className="min-w-0 flex-1">
               <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>
               )}
-              {titleLine && (
-                <p className="text-sm text-muted-foreground truncate">{titleLine}</p>
-              )}
-              {orgs.length > 0 && orgs[0].name && (
-                <p className="text-sm text-muted-foreground truncate">{orgs[0].name}</p>
+              {subtitleParts.length > 0 && (
+                <p className="text-sm text-muted-foreground truncate">{subtitleParts.join(" · ")}</p>
               )}
             </div>
           </div>
-          <div className="flex gap-2">
+          <div className="flex gap-2 flex-shrink-0 flex-wrap">
+            {email && (
+              <a
+                href={`mailto:${email}`}
+                className="inline-flex items-center justify-center rounded-md font-medium h-9 px-3 text-sm border border-input bg-background hover:bg-accent hover:text-accent-foreground transition-colors touch-manipulation"
+              >
+                <Send className="w-4 h-4 mr-1" />
+                {t("detail.compose_email")}
+              </a>
+            )}
+            {phone && (
+              <a
+                href={`tel:${phone}`}
+                className="inline-flex items-center justify-center rounded-md font-medium h-9 px-3 text-sm border border-input bg-background hover:bg-accent hover:text-accent-foreground transition-colors touch-manipulation"
+              >
+                <Phone className="w-4 h-4 mr-1" />
+                {t("context_menu.call")}
+              </a>
+            )}
             <Button variant="outline" size="sm" onClick={onEdit} className="touch-manipulation">
               <Pencil className="w-4 h-4 mr-1" />
               {t("form.edit_title")}
             </Button>
-            <Button variant="outline" size="sm" onClick={onDelete} className="text-red-600 dark:text-red-400 hover:text-red-700 dark:hover:text-red-300 hover:bg-red-50 dark:hover:bg-red-950 touch-manipulation">
-              <Trash2 className="w-4 h-4" />
-            </Button>
+            <MoreActionsMenu items={moreItems} label={t("detail.more_actions")} />
           </div>
         </div>
       </div>
 
-      <div className="px-6 py-6">
-        <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-3 gap-4">
-          <ContactActivity contact={contact} />
-
-          {/* Contact info */}
-          {emails.length > 0 && (
-            <Section icon={Mail} title={t("detail.emails")} category="contact">
+      <div className={cn("divide-y divide-border/60", isMobile ? "px-4" : "px-6")}>
+        {hasContactDetails && (
+          <Section title={t("detail.section_contact")}>
+            <div className="space-y-3">
               {emails.map((e, i) => (
-                <div key={i} className="flex items-center gap-2 group">
-                  <a href={`mailto:${e.address}`} className="text-sm text-primary hover:underline">
-                    {e.address}
-                  </a>
-                  {e.contexts && <ContextBadge contexts={e.contexts} />}
-                  {e.label && <span className="text-xs text-muted-foreground">({e.label})</span>}
-                  <div className={cn(
-                    "flex items-center gap-0.5 transition-opacity",
-                    isMobile ? "opacity-100" : "opacity-0 group-hover:opacity-100"
-                  )}>
-                    <a
-                      href={`mailto:${e.address}`}
-                      className="p-1.5 rounded hover:bg-muted transition-colors touch-manipulation"
-                      title={t("detail.compose_email")}
-                      aria-label={t("detail.compose_email")}
-                    >
-                      <Send className="w-3.5 h-3.5 text-muted-foreground" />
+                <FieldRow key={`em${i}`} icon={Mail} label={e.label || formatContexts(e.contexts) || t("detail.email_default_label")}>
+                  <div className="flex items-center gap-2 group">
+                    <a href={`mailto:${e.address}`} className="text-sm text-primary hover:underline break-all">
+                      {e.address}
                     </a>
-                    <CopyButton value={e.address} label={t("detail.copy_email")} successMsg={t("detail.copied")} failMsg={t("detail.copy_failed")} />
+                    <RowActions>
+                      <a
+                        href={`mailto:${e.address}`}
+                        className="p-1.5 rounded hover:bg-muted transition-colors touch-manipulation"
+                        title={t("detail.compose_email")}
+                        aria-label={t("detail.compose_email")}
+                      >
+                        <Send className="w-3.5 h-3.5 text-muted-foreground" />
+                      </a>
+                      <CopyButton value={e.address} label={t("detail.copy_email")} successMsg={t("detail.copied")} failMsg={t("detail.copy_failed")} />
+                    </RowActions>
                   </div>
-                </div>
+                </FieldRow>
               ))}
-            </Section>
-          )}
 
-          {phones.length > 0 && (
-            <Section icon={Phone} title={t("detail.phones")} category="contact">
               {phones.map((p, i) => {
-                const featureStr = formatPhoneFeatures(p.features);
+                const features = formatPhoneFeatures(p.features);
+                const labelParts = [p.label, formatContexts(p.contexts), features].filter(Boolean) as string[];
                 return (
-                  <div key={i} className="flex items-center gap-2 group">
-                    <a href={`tel:${p.number}`} className="text-sm text-primary hover:underline">
-                      {p.number}
-                    </a>
-                    {p.contexts && <ContextBadge contexts={p.contexts} />}
-                    {featureStr && (
-                      <span className="text-xs px-1.5 py-0.5 rounded bg-muted text-muted-foreground">{featureStr}</span>
-                    )}
-                    <CopyButton
-                      value={p.number}
-                      label={t("detail.copy_phone")}
-                      successMsg={t("detail.copied")}
-                      failMsg={t("detail.copy_failed")}
-                      className={isMobile ? "opacity-100" : "opacity-0 group-hover:opacity-100"}
-                    />
-                  </div>
+                  <FieldRow key={`ph${i}`} icon={Phone} label={labelParts.length ? labelParts.join(" · ") : t("detail.phone_default_label")}>
+                    <div className="flex items-center gap-2 group">
+                      <a href={`tel:${p.number}`} className="text-sm text-primary hover:underline">
+                        {p.number}
+                      </a>
+                      <RowActions>
+                        <CopyButton value={p.number} label={t("detail.copy_phone")} successMsg={t("detail.copied")} failMsg={t("detail.copy_failed")} />
+                      </RowActions>
+                    </div>
+                  </FieldRow>
                 );
               })}
-            </Section>
-          )}
 
-          {(roles.length > 0 || jobTitles.length > 1) && (
-            <Section icon={Briefcase} title={t("detail.titles")} category="work">
-              {titles.map((tl, i) => (
-                <div key={i} className="text-sm flex items-center gap-2">
-                  <span>{tl.name}</span>
-                  {tl.kind && (
-                    <span className="text-xs px-1.5 py-0.5 rounded bg-muted text-muted-foreground">{tl.kind}</span>
-                  )}
-                </div>
-              ))}
-            </Section>
-          )}
-
-          {orgs.length > 0 && (
-            <Section icon={Building} title={t("detail.organizations")} category="work">
-              {orgs.map((o, i) => (
-                <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>
-                  )}
-                </div>
-              ))}
-            </Section>
-          )}
-
-          {/* Addresses span full width */}
-          {addresses.length > 0 && (
-            <div className="md:col-span-2 xl:col-span-3">
-              <Section icon={MapPin} title={t("detail.addresses")} category="location">
-                <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-3 gap-3">
-                  {addresses.map((a, i) => (
-                    <div key={i} className="text-sm space-y-0.5 rounded-md border border-border/60 bg-muted/30 p-3">
-                      <div>
-                        {a.full || a.fullAddress
-                          ? (a.full || a.fullAddress)
-                          : a.components && a.components.length > 0
-                            ? a.components.filter(c => c.kind !== 'separator').map(c => c.value).filter(Boolean).join(", ")
-                            : [a.street, a.locality, a.region, a.postcode, a.country].filter(Boolean).join(", ")}
-                        {a.contexts && <ContextBadge contexts={a.contexts} />}
-                      </div>
+              {addresses.map((a, i) => {
+                const lines: string[] = [];
+                if (a.full || a.fullAddress) {
+                  lines.push((a.full || a.fullAddress) as string);
+                } else if (a.components && a.components.length > 0) {
+                  const joined = a.components.filter(c => c.kind !== 'separator').map(c => c.value).filter(Boolean).join(", ");
+                  if (joined) lines.push(joined);
+                } else {
+                  const parts = [a.street, [a.postcode, a.locality].filter(Boolean).join(" "), a.region, a.country]
+                    .map(s => (typeof s === "string" ? s.trim() : ""))
+                    .filter(Boolean) as string[];
+                  lines.push(...parts);
+                }
+                return (
+                  <FieldRow key={`ad${i}`} icon={MapPin} label={formatContexts(a.contexts) || t("detail.address_default_label")}>
+                    <div className="text-sm space-y-0.5">
+                      {lines.map((line, idx) => (
+                        <div key={idx}>{line}</div>
+                      ))}
                       {a.timeZone && (
                         <div className="text-xs text-muted-foreground">{t("detail.timezone")}: {a.timeZone}</div>
                       )}
                     </div>
-                  ))}
-                </div>
-              </Section>
-            </div>
-          )}
+                  </FieldRow>
+                );
+              })}
 
-          {onlineServices.length > 0 && (
-            <Section icon={Globe} title={t("detail.online_services")} category="digital">
               {onlineServices.map((svc, i) => (
-                <div key={i} className="flex items-center gap-2 group">
-                  {typeof svc.uri === 'string' && svc.uri.startsWith("http") ? (
-                    <a href={svc.uri} target="_blank" rel="noopener noreferrer" className="text-sm text-primary hover:underline break-all">
-                      {svc.user || svc.uri}
-                    </a>
-                  ) : (
-                    <span className="text-sm break-all">{svc.user || String(svc.uri ?? '')}</span>
-                  )}
-                  {svc.service && (
-                    <span className="text-xs px-1.5 py-0.5 rounded bg-muted text-muted-foreground">{svc.service}</span>
-                  )}
-                  {svc.contexts && <ContextBadge contexts={svc.contexts} />}
-                  <CopyButton
-                    value={svc.user || svc.uri}
-                    label={t("detail.copy_url")}
-                    successMsg={t("detail.copied")}
-                    failMsg={t("detail.copy_failed")}
-                    className={isMobile ? "opacity-100" : "opacity-0 group-hover:opacity-100"}
-                  />
-                </div>
+                <FieldRow
+                  key={`os${i}`}
+                  icon={Globe}
+                  label={[svc.service, formatContexts(svc.contexts)].filter(Boolean).join(" · ") || t("detail.online_service_default_label")}
+                >
+                  <div className="flex items-center gap-2 group">
+                    {typeof svc.uri === 'string' && svc.uri.startsWith("http") ? (
+                      <a href={svc.uri} target="_blank" rel="noopener noreferrer" className="text-sm text-primary hover:underline break-all">
+                        {svc.user || svc.uri}
+                      </a>
+                    ) : (
+                      <span className="text-sm break-all">{svc.user || String(svc.uri ?? '')}</span>
+                    )}
+                    <RowActions>
+                      <CopyButton value={svc.user || svc.uri} label={t("detail.copy_url")} successMsg={t("detail.copied")} failMsg={t("detail.copy_failed")} />
+                    </RowActions>
+                  </div>
+                </FieldRow>
               ))}
-            </Section>
-          )}
+            </div>
+          </Section>
+        )}
 
-          {anniversaries.length > 0 && (
-            <Section icon={Cake} title={t("detail.anniversaries")} category="personal">
-              {anniversaries.map((ann, i) => (
-                <div key={i} className="flex items-center gap-2 text-sm">
-                  <span>{formatDate(ann.date)}</span>
-                  <span className="text-xs px-1.5 py-0.5 rounded bg-muted text-muted-foreground">
-                    {t(`detail.anniversary_${ann.kind}`)}
-                  </span>
-                </div>
+        {hasWork && (
+          <Section title={t("detail.section_work")}>
+            <div className="space-y-3">
+              {orgs.map((o, i) => (
+                <FieldRow key={`org${i}`} icon={Building} label={t("detail.organization_label")}>
+                  <div className="text-sm">
+                    {o.name}
+                    {o.units && o.units.length > 0 && (
+                      <span className="text-muted-foreground"> · {o.units.map(u => u.name).join(", ")}</span>
+                    )}
+                  </div>
+                </FieldRow>
               ))}
-            </Section>
-          )}
-
-          {personalInfo.length > 0 && (
-            <Section icon={Heart} title={t("detail.personal_info")} category="personal">
-              {personalInfo.map((pi, i) => (
-                <div key={i} className="flex items-center gap-2 text-sm">
-                  <span>{pi.value}</span>
-                  <span className="text-xs px-1.5 py-0.5 rounded bg-muted text-muted-foreground">{t(`detail.personal_${pi.kind}`)}</span>
-                  {pi.level && (
-                    <span className="text-xs text-muted-foreground">({pi.level})</span>
-                  )}
-                </div>
+              {titles.map((tl, i) => (
+                <FieldRow
+                  key={`tl${i}`}
+                  icon={Briefcase}
+                  label={tl.kind === "role" ? t("detail.role_label") : t("detail.title_label")}
+                >
+                  <div className="text-sm">{tl.name}</div>
+                </FieldRow>
               ))}
-            </Section>
-          )}
+            </div>
+          </Section>
+        )}
 
-          {contact.speakToAs && (contact.speakToAs.grammaticalGender || contact.speakToAs.pronouns) && (
-            <Section icon={UserCircle} title={t("detail.gender")} category="personal">
-              <div className="text-sm">
-                {contact.speakToAs.grammaticalGender && <span>{t(`detail.gender_${contact.speakToAs.grammaticalGender}`, { defaultValue: contact.speakToAs.grammaticalGender })}</span>}
-                {contact.speakToAs.pronouns && (() => {
-                  const firstPronoun = Object.values(contact.speakToAs!.pronouns!)[0]?.pronouns;
-                  return firstPronoun ? (
-                    <span className="text-muted-foreground">{contact.speakToAs!.grammaticalGender ? " - " : ""}{firstPronoun}</span>
-                  ) : null;
-                })()}
-              </div>
-            </Section>
-          )}
-
-          {preferredLanguages.length > 0 && (
-            <Section icon={Languages} title={t("detail.languages")} category="personal">
+        {hasPersonal && (
+          <Section title={t("detail.section_personal")}>
+            <div className="space-y-3">
+              {anniversaries.map((ann, i) => {
+                const years = getCompletedYears(ann.date);
+                const suffixKey = ann.kind === "birth" ? "detail.age_years" : "detail.years_since";
+                return (
+                  <FieldRow key={`an${i}`} icon={Cake} label={t(`detail.anniversary_${ann.kind}`)}>
+                    <div className="text-sm">
+                      {formatDate(ann.date)}
+                      {years !== null && (
+                        <span className="text-muted-foreground"> · {t(suffixKey, { count: years })}</span>
+                      )}
+                    </div>
+                  </FieldRow>
+                );
+              })}
+              {hasGender && (
+                <FieldRow icon={UserCircle} label={t("detail.gender")}>
+                  <div className="text-sm">
+                    {contact.speakToAs?.grammaticalGender && (
+                      <span>{t(`detail.gender_${contact.speakToAs.grammaticalGender}`, { defaultValue: contact.speakToAs.grammaticalGender })}</span>
+                    )}
+                    {contact.speakToAs?.pronouns && (() => {
+                      const firstPronoun = Object.values(contact.speakToAs!.pronouns!)[0]?.pronouns;
+                      return firstPronoun ? (
+                        <span className="text-muted-foreground">{contact.speakToAs!.grammaticalGender ? " · " : ""}{firstPronoun}</span>
+                      ) : null;
+                    })()}
+                  </div>
+                </FieldRow>
+              )}
               {preferredLanguages.map((lang, i) => (
-                <div key={i} className="flex items-center gap-2 text-sm">
-                  <span>{lang.language}</span>
-                  {lang.contexts && <ContextBadge contexts={lang.contexts} />}
-                </div>
+                <FieldRow
+                  key={`lg${i}`}
+                  icon={Languages}
+                  label={formatContexts(lang.contexts) || t("detail.language_label")}
+                >
+                  <div className="text-sm">{lang.language}</div>
+                </FieldRow>
               ))}
-            </Section>
-          )}
+              {personalInfo.map((pi, i) => (
+                <FieldRow
+                  key={`pi${i}`}
+                  icon={Heart}
+                  label={`${t(`detail.personal_${pi.kind}`)}${pi.level ? ` · ${pi.level}` : ""}`}
+                >
+                  <div className="text-sm">{pi.value}</div>
+                </FieldRow>
+              ))}
+            </div>
+          </Section>
+        )}
 
-          {keywords.length > 0 && (
-            <Section icon={Tag} title={t("detail.categories")} category="digital">
-              <div className="flex flex-wrap gap-1.5">
-                {keywords.map((kw, i) => (
-                  <span key={i} className="text-xs px-2 py-1 rounded-full bg-primary/10 text-primary">
-                    {kw}
-                  </span>
-                ))}
-              </div>
-            </Section>
-          )}
+        {keywords.length > 0 && (
+          <Section title={t("detail.categories")}>
+            <div className="flex flex-wrap gap-1.5">
+              {keywords.map((kw, i) => (
+                <span key={i} className="text-xs px-2 py-1 rounded-full bg-primary/10 text-primary">
+                  {kw}
+                </span>
+              ))}
+            </div>
+          </Section>
+        )}
 
-          {relatedTo.length > 0 && (
-            <Section icon={Users} title={t("detail.related_contacts")} category="personal">
+        {relatedTo.length > 0 && (
+          <Section title={t("detail.related_contacts")}>
+            <div className="space-y-2">
               {relatedTo.map(([uri, rel], i) => {
                 const relType = rel.relation ? Object.keys(rel.relation).find(k => rel.relation![k]) : undefined;
                 return (
-                  <div key={i} className="flex items-center gap-2 text-sm">
-                    <span>{uri}</span>
-                    {relType && (
-                      <span className="text-xs px-1.5 py-0.5 rounded bg-muted text-muted-foreground">{relType}</span>
-                    )}
-                  </div>
+                  <FieldRow key={`rel${i}`} icon={Users} label={relType || t("detail.related_default_label")}>
+                    <div className="text-sm break-all">{uri}</div>
+                  </FieldRow>
                 );
               })}
-            </Section>
-          )}
+            </div>
+          </Section>
+        )}
 
-          {cryptoKeys.length > 0 && (
-            <Section icon={KeyRound} title={t("detail.crypto_keys")} category="digital">
+        {cryptoKeys.length > 0 && (
+          <Section title={t("detail.crypto_keys")}>
+            <div className="space-y-3">
               {cryptoKeys.map((key, i) => {
                 const certInfo = parsedCerts.get(i);
                 const isExpired = certInfo ? new Date(certInfo.notAfter) < new Date() : false;
@@ -430,7 +498,7 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
                   : false;
 
                 return (
-                  <div key={i} className="p-3 rounded-lg border border-border space-y-1">
+                  <div key={i} className="rounded-md border border-border/60 bg-muted/30 p-3 space-y-1">
                     {certInfo ? (
                       <>
                         <div className="flex items-center gap-2">
@@ -451,12 +519,7 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
                           {certInfo.algorithm && <p>{t("detail.cert_algorithm")}: {certInfo.algorithm}</p>}
                         </div>
                         {!alreadyImported && (
-                          <Button
-                            variant="ghost"
-                            size="sm"
-                            className="ml-4 mt-1"
-                            onClick={() => handleImportContactCert(i)}
-                          >
+                          <Button variant="ghost" size="sm" className="ml-4 mt-1" onClick={() => handleImportContactCert(i)}>
                             <Download className="w-3 h-3 mr-1" />
                             {t("detail.import_to_smime")}
                           </Button>
@@ -466,7 +529,8 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
                         )}
                       </>
                     ) : (
-                      <div className="text-sm break-all">
+                      <div className="flex items-start gap-2 text-sm break-all">
+                        <KeyRound className="w-4 h-4 text-muted-foreground mt-0.5 flex-shrink-0" />
                         {typeof key.uri === 'string' && key.uri.startsWith("http") ? (
                           <a href={key.uri} target="_blank" rel="noopener noreferrer" className="text-primary hover:underline">
                             {key.uri}
@@ -479,91 +543,168 @@ export function ContactDetail({ contact, onEdit, onDelete, isMobile, className }
                   </div>
                 );
               })}
-            </Section>
-          )}
+            </div>
+          </Section>
+        )}
 
-          {(contact.calendarUri || contact.schedulingUri || contact.freeBusyUri) && (
-            <Section icon={Calendar} title={t("detail.calendar")} category="calendar">
+        {(contact.calendarUri || contact.schedulingUri || contact.freeBusyUri) && (
+          <Section title={t("detail.calendar")}>
+            <div className="space-y-3">
               {contact.calendarUri && (
-                <div className="text-sm">
-                  <span className="text-muted-foreground">{t("detail.calendar_uri")}: </span>
-                  <a href={contact.calendarUri} target="_blank" rel="noopener noreferrer" className="text-primary hover:underline break-all">{contact.calendarUri}</a>
-                </div>
+                <FieldRow icon={Calendar} label={t("detail.calendar_uri")}>
+                  <a href={contact.calendarUri} target="_blank" rel="noopener noreferrer" className="text-sm text-primary hover:underline break-all">
+                    {contact.calendarUri}
+                  </a>
+                </FieldRow>
               )}
               {contact.schedulingUri && (
-                <div className="text-sm">
-                  <span className="text-muted-foreground">{t("detail.scheduling_uri")}: </span>
-                  <a href={contact.schedulingUri} target="_blank" rel="noopener noreferrer" className="text-primary hover:underline break-all">{contact.schedulingUri}</a>
-                </div>
+                <FieldRow icon={Calendar} label={t("detail.scheduling_uri")}>
+                  <a href={contact.schedulingUri} target="_blank" rel="noopener noreferrer" className="text-sm text-primary hover:underline break-all">
+                    {contact.schedulingUri}
+                  </a>
+                </FieldRow>
               )}
               {contact.freeBusyUri && (
-                <div className="text-sm">
-                  <span className="text-muted-foreground">{t("detail.freebusy_uri")}: </span>
-                  <a href={contact.freeBusyUri} target="_blank" rel="noopener noreferrer" className="text-primary hover:underline break-all">{contact.freeBusyUri}</a>
-                </div>
+                <FieldRow icon={Calendar} label={t("detail.freebusy_uri")}>
+                  <a href={contact.freeBusyUri} target="_blank" rel="noopener noreferrer" className="text-sm text-primary hover:underline break-all">
+                    {contact.freeBusyUri}
+                  </a>
+                </FieldRow>
               )}
-            </Section>
-          )}
+            </div>
+          </Section>
+        )}
 
-          {/* Notes span full width */}
-          {notes.length > 0 && (
-            <div className="md:col-span-2 xl:col-span-3">
-              <Section icon={StickyNote} title={t("detail.notes")} category="notes">
+        {notes.length > 0 && (
+          <Section title={t("detail.notes")}>
+            <div className="flex items-start gap-3">
+              <StickyNote className="w-4 h-4 text-muted-foreground mt-1 flex-shrink-0" />
+              <div className="text-sm space-y-2 flex-1 min-w-0">
                 {notes.map((n, i) => (
-                  <p key={i} className="text-sm whitespace-pre-wrap">{n.note}</p>
+                  <p key={i} className="whitespace-pre-wrap">{n.note}</p>
                 ))}
-              </Section>
+              </div>
             </div>
-          )}
+          </Section>
+        )}
 
-          {/* Timestamps span full width */}
-          {(contact.created || contact.updated) && (
-            <div className="md:col-span-2 xl:col-span-3 pt-2 border-t border-border text-xs text-muted-foreground space-y-1">
-              {contact.created && <div>{t("detail.created")}: {formatDate(contact.created)}</div>}
-              {contact.updated && <div>{t("detail.updated")}: {formatDate(contact.updated)}</div>}
-            </div>
-          )}
+        <ContactActivity contact={contact} />
+
+        {(contact.created || contact.updated) && (
+          <div className="py-4 text-xs text-muted-foreground space-y-1">
+            {contact.created && <div>{t("detail.created")}: {formatDate(contact.created)}</div>}
+            {contact.updated && <div>{t("detail.updated")}: {formatDate(contact.updated)}</div>}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
+function formatContexts(contexts?: Record<string, boolean>): string {
+  if (!contexts) return "";
+  return Object.keys(contexts).filter(k => contexts[k]).join(", ");
+}
+
+export function Section({ title, children, className }: { title: string; children: React.ReactNode; className?: string }) {
+  return (
+    <section className={cn("py-6", className)}>
+      <h3 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground mb-3">{title}</h3>
+      {children}
+    </section>
+  );
+}
+
+function FieldRow({ icon: Icon, label, children }: { icon: React.ComponentType<{ className?: string }>; label?: string; children: React.ReactNode }) {
+  return (
+    <div className="flex items-start gap-3">
+      <Icon className="w-4 h-4 text-muted-foreground mt-1 flex-shrink-0" />
+      <div className="flex-1 min-w-0">
+        {label && <div className="text-xs text-muted-foreground mb-0.5">{label}</div>}
+        {children}
+      </div>
+    </div>
+  );
+}
+
+function RowActions({ children }: { children: React.ReactNode }) {
+  return (
+    <div className="flex items-center gap-0.5 opacity-0 group-hover:opacity-100 transition-opacity">
+      {children}
+    </div>
+  );
+}
+
+function MoreActionsMenu({ items, label }: { items: MoreItem[]; label: string }) {
+  const [open, setOpen] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    if (!open) return;
+    const onDocMouseDown = (e: MouseEvent) => {
+      if (!ref.current?.contains(e.target as Node)) setOpen(false);
+    };
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") setOpen(false);
+    };
+    document.addEventListener("mousedown", onDocMouseDown);
+    document.addEventListener("keydown", onKey);
+    return () => {
+      document.removeEventListener("mousedown", onDocMouseDown);
+      document.removeEventListener("keydown", onKey);
+    };
+  }, [open]);
+
+  if (items.length === 0) return null;
+
+  return (
+    <div ref={ref} className="relative">
+      <Button
+        variant="outline"
+        size="sm"
+        onClick={() => setOpen((o) => !o)}
+        title={label}
+        aria-label={label}
+        aria-haspopup="menu"
+        aria-expanded={open}
+        className="touch-manipulation"
+      >
+        <MoreHorizontal className="w-4 h-4" />
+      </Button>
+      {open && (
+        <div
+          role="menu"
+          className="absolute right-0 top-full mt-1 z-30 min-w-[200px] rounded-md border border-border bg-popover text-popover-foreground shadow-lg py-1 animate-in fade-in-0 zoom-in-95 duration-100"
+        >
+          {items.map((item, i) => {
+            if (item.separator) {
+              return <div key={i} role="separator" className="my-1 h-px bg-border" />;
+            }
+            return (
+              <button
+                key={i}
+                type="button"
+                role="menuitem"
+                onClick={() => {
+                  item.onClick();
+                  setOpen(false);
+                }}
+                className={cn(
+                  "w-full flex items-center gap-2 px-3 py-1.5 text-sm text-left hover:bg-muted focus:bg-muted focus:outline-none transition-colors",
+                  item.destructive && "text-red-600 dark:text-red-400 hover:bg-red-50 dark:hover:bg-red-950 focus:bg-red-50 dark:focus:bg-red-950",
+                )}
+              >
+                <item.icon className={cn("w-4 h-4 flex-shrink-0", item.destructive ? "text-red-600 dark:text-red-400" : "text-muted-foreground")} />
+                <span className="flex-1">{item.label}</span>
+              </button>
+            );
+          })}
         </div>
-      </div>
+      )}
     </div>
   );
 }
 
-type SectionCategory = "contact" | "work" | "location" | "personal" | "digital" | "calendar" | "notes";
-
-const categoryStyles: Record<SectionCategory, string> = {
-  contact: "border-l-blue-400 dark:border-l-blue-500",
-  work: "border-l-amber-400 dark:border-l-amber-500",
-  location: "border-l-emerald-400 dark:border-l-emerald-500",
-  personal: "border-l-violet-400 dark:border-l-violet-500",
-  digital: "border-l-cyan-400 dark:border-l-cyan-500",
-  calendar: "border-l-rose-400 dark:border-l-rose-500",
-  notes: "border-l-stone-400 dark:border-l-stone-500",
-};
-
-function Section({ icon: Icon, title, children, category = "contact" }: { icon: React.ComponentType<{ className?: string }>; title: string; children: React.ReactNode; category?: SectionCategory }) {
-  return (
-    <div className={cn("rounded-lg border border-border bg-card p-4 border-l-[3px]", categoryStyles[category])}>
-      <div className="flex items-center gap-2 mb-2.5">
-        <Icon className="w-4 h-4 text-muted-foreground" />
-        <h3 className="text-sm font-medium text-muted-foreground">{title}</h3>
-      </div>
-      <div className="space-y-1.5 pl-6">{children}</div>
-    </div>
-  );
-}
-
-function ContextBadge({ contexts }: { contexts: Record<string, boolean> }) {
-  const labels = Object.keys(contexts).filter(k => contexts[k]);
-  if (labels.length === 0) return null;
-
-  return (
-    <span className="text-xs px-1.5 py-0.5 rounded bg-muted text-muted-foreground ml-1">
-      {labels.join(", ")}
-    </span>
-  );
-}
-
 function CopyButton({ value, label, successMsg, failMsg, className }: { value: string; label: string; successMsg: string; failMsg: string; className?: string }) {
   return (
     <button
@@ -575,7 +716,7 @@ function CopyButton({ value, label, successMsg, failMsg, className }: { value: s
           toast.error(failMsg);
         }
       }}
-      className={cn("p-1.5 rounded hover:bg-muted transition-colors touch-manipulation transition-opacity", className)}
+      className={cn("p-1.5 rounded hover:bg-muted transition-colors touch-manipulation", className)}
       title={label}
       aria-label={label}
     >

components/contacts/contact-form.tsx

@@ -2,11 +2,12 @@
 
 import { useState, useMemo, useCallback, useEffect, useRef } from "react";
 import { useTranslations } from "next-intl";
-import { X, Plus, ChevronDown, ChevronRight, User, Building, MapPin, Globe, Cake, Heart, Tag, StickyNote, Mail, Phone, Calendar, UserCircle, Book } from "lucide-react";
+import { X, Plus, ChevronDown, ChevronRight, User, Building, MapPin, Globe, Cake, Heart, Tag, StickyNote, Mail, Phone, Calendar, UserCircle, Book, Camera, Trash2 } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
+import { Avatar } from "@/components/ui/avatar";
 import { cn } from "@/lib/utils";
-import type { ContactCard, ContactOnlineService, ContactAnniversary, ContactPersonalInfo, AddressBook, AnniversaryDate, PartialDate, ContactAddress } from "@/lib/jmap/types";
+import type { ContactCard, ContactOnlineService, ContactAnniversary, ContactPersonalInfo, AddressBook, AnniversaryDate, PartialDate, ContactAddress, ContactMedia } from "@/lib/jmap/types";
 
 interface EmailEntry {
   address: string;
@@ -49,59 +50,78 @@ interface ContactFormProps {
   contact?: ContactCard | null;
   addressBooks?: AddressBook[];
   allKeywords?: string[];
+  defaultAddressBookId?: string;
   onSave: (data: Partial<ContactCard>) => Promise<void>;
   onCancel: () => void;
 }
 
-type FormCategory = "contact" | "work" | "location" | "personal" | "digital" | "calendar" | "notes";
-
-const formCategoryStyles: Record<FormCategory, string> = {
-  contact: "border-l-blue-400 dark:border-l-blue-500",
-  work: "border-l-amber-400 dark:border-l-amber-500",
-  location: "border-l-emerald-400 dark:border-l-emerald-500",
-  personal: "border-l-violet-400 dark:border-l-violet-500",
-  digital: "border-l-cyan-400 dark:border-l-cyan-500",
-  calendar: "border-l-rose-400 dark:border-l-rose-500",
-  notes: "border-l-stone-400 dark:border-l-stone-500",
-};
-
-function FormSection({ icon: Icon, title, children, collapsible, defaultOpen = false, category = "contact" }: {
+function FormSection({ icon: Icon, title, children, collapsible, defaultOpen = true }: {
   icon: React.ComponentType<{ className?: string }>;
   title: string;
   children: React.ReactNode;
   collapsible?: boolean;
   defaultOpen?: boolean;
-  category?: FormCategory;
 }) {
-  const [open, setOpen] = useState(defaultOpen || !collapsible);
+  const [open, setOpen] = useState(defaultOpen);
 
   return (
-    <div className={cn("rounded-lg border border-border bg-card border-l-[3px] px-4 py-3", formCategoryStyles[category])}>
+    <section className="py-5">
       <button
         type="button"
         className={cn(
-          "flex items-center gap-2 w-full py-0.5 text-sm font-medium text-foreground transition-colors",
-          collapsible && "hover:text-muted-foreground cursor-pointer",
-          !collapsible && "cursor-default"
+          "flex items-center gap-2 w-full text-left",
+          collapsible ? "cursor-pointer" : "cursor-default"
         )}
         onClick={() => collapsible && setOpen(!open)}
         tabIndex={collapsible ? 0 : -1}
       >
         <Icon className="w-4 h-4 text-muted-foreground shrink-0" />
-        <span className="flex-1 text-left">{title}</span>
+        <h3 className="flex-1 text-xs font-semibold uppercase tracking-wide text-muted-foreground">{title}</h3>
         {collapsible && (
           open ? <ChevronDown className="w-3.5 h-3.5 text-muted-foreground" /> : <ChevronRight className="w-3.5 h-3.5 text-muted-foreground" />
         )}
       </button>
-      {open && (
-        <div className="space-y-3 pt-3 pb-1">
+      {(open || !collapsible) && (
+        <div className="space-y-3 mt-3">
           {children}
         </div>
       )}
-    </div>
+    </section>
   );
 }
 
+const MAX_PHOTO_DIM = 512;
+const PHOTO_QUALITY = 0.85;
+
+async function processImageFile(file: File): Promise<{ uri: string; mediaType: string }> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = () => {
+      const img = new Image();
+      img.onload = () => {
+        const ratio = Math.min(1, MAX_PHOTO_DIM / Math.max(img.width, img.height));
+        const w = Math.max(1, Math.round(img.width * ratio));
+        const h = Math.max(1, Math.round(img.height * ratio));
+        const canvas = document.createElement("canvas");
+        canvas.width = w;
+        canvas.height = h;
+        const ctx = canvas.getContext("2d");
+        if (!ctx) {
+          reject(new Error("canvas-unsupported"));
+          return;
+        }
+        ctx.drawImage(img, 0, 0, w, h);
+        const uri = canvas.toDataURL("image/jpeg", PHOTO_QUALITY);
+        resolve({ uri, mediaType: "image/jpeg" });
+      };
+      img.onerror = () => reject(new Error("invalid-image"));
+      img.src = reader.result as string;
+    };
+    reader.onerror = () => reject(new Error("read-failed"));
+    reader.readAsDataURL(file);
+  });
+}
+
 function Select({ value, onChange, children, className }: {
   value: string;
   onChange: (e: React.ChangeEvent<HTMLSelectElement>) => void;
@@ -124,11 +144,13 @@ function Select({ value, onChange, children, className }: {
   );
 }
 
-export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCancel }: ContactFormProps) {
+export function ContactForm({ contact, addressBooks, allKeywords, defaultAddressBookId, onSave, onCancel }: ContactFormProps) {
   const t = useTranslations("contacts.form");
   const isEditing = !!contact;
 
-  const findComponent = (kind: string) => contact?.name?.components?.find(c => c.kind === kind)?.value || "";
+  // Accept JSContact-standard kinds (RFC 9553) and legacy vCard-style aliases.
+  const findComponent = (...kinds: string[]) =>
+    contact?.name?.components?.find(c => kinds.includes(c.kind))?.value || "";
 
   // Convert RFC 9553 AnniversaryDate to ISO date string for HTML date input
   function anniversaryDateToString(date: AnniversaryDate): string {
@@ -191,11 +213,11 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
     };
   }
 
-  const [prefix, setPrefix] = useState(findComponent("prefix"));
+  const [prefix, setPrefix] = useState(findComponent("title", "prefix"));
   const [givenName, setGivenName] = useState(findComponent("given"));
-  const [additionalName, setAdditionalName] = useState(findComponent("additional"));
+  const [additionalName, setAdditionalName] = useState(findComponent("given2", "additional", "middle"));
   const [surname, setSurname] = useState(findComponent("surname"));
-  const [suffix, setSuffix] = useState(findComponent("suffix"));
+  const [suffix, setSuffix] = useState(findComponent("generation", "suffix"));
 
   const [nickname, setNickname] = useState(
     contact?.nicknames ? Object.values(contact.nicknames)[0]?.name || "" : ""
@@ -309,14 +331,61 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
         return ids[0];
       }
     }
+    if (defaultAddressBookId && addressBooks?.some(b => b.id === defaultAddressBookId)) {
+      return defaultAddressBookId;
+    }
     return "";
-  }, [contact]);
+  }, [contact, defaultAddressBookId, addressBooks]);
   const [selectedBookId, setSelectedBookId] = useState(currentBookId);
 
+  const initialPhotoEntry = useMemo(() => {
+    if (!contact?.media) return null;
+    for (const [key, m] of Object.entries(contact.media)) {
+      if (m.kind === "photo" && m.uri) return { key, uri: m.uri, mediaType: m.mediaType };
+    }
+    return null;
+  }, [contact]);
+  const [photoUri, setPhotoUri] = useState<string | undefined>(initialPhotoEntry?.uri);
+  const [photoMediaType, setPhotoMediaType] = useState<string | undefined>(initialPhotoEntry?.mediaType);
+  const [photoError, setPhotoError] = useState<string | null>(null);
+  const [photoUploading, setPhotoUploading] = useState(false);
+  const photoInputRef = useRef<HTMLInputElement>(null);
+
   const [isSaving, setIsSaving] = useState(false);
   const [error, setError] = useState<string | null>(null);
   const [emailErrors, setEmailErrors] = useState<Record<number, string>>({});
 
+  const handlePhotoSelect = async (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0];
+    e.target.value = "";
+    if (!file) return;
+    if (!file.type.startsWith("image/")) {
+      setPhotoError(t("photo_invalid"));
+      return;
+    }
+    if (file.size > 10 * 1024 * 1024) {
+      setPhotoError(t("photo_too_large"));
+      return;
+    }
+    setPhotoError(null);
+    setPhotoUploading(true);
+    try {
+      const { uri, mediaType } = await processImageFile(file);
+      setPhotoUri(uri);
+      setPhotoMediaType(mediaType);
+    } catch {
+      setPhotoError(t("photo_invalid"));
+    } finally {
+      setPhotoUploading(false);
+    }
+  };
+
+  const handlePhotoRemove = () => {
+    setPhotoUri(undefined);
+    setPhotoMediaType(undefined);
+    setPhotoError(null);
+  };
+
   const validateEmail = (address: string): boolean => {
     if (!address.trim()) return true;
     return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(address.trim());
@@ -373,12 +442,13 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
       phonesMap[`p${i}`] = obj;
     });
 
+    // Emit JSContact-standard kinds (RFC 9553) so the JMAP server stores them losslessly.
     const nameComponents = [];
-    if (prefix.trim()) nameComponents.push({ kind: "prefix" as const, value: prefix.trim() });
+    if (prefix.trim()) nameComponents.push({ kind: "title" as const, value: prefix.trim() });
     if (givenName.trim()) nameComponents.push({ kind: "given" as const, value: givenName.trim() });
-    if (additionalName.trim()) nameComponents.push({ kind: "additional" as const, value: additionalName.trim() });
+    if (additionalName.trim()) nameComponents.push({ kind: "given2" as const, value: additionalName.trim() });
     if (surname.trim()) nameComponents.push({ kind: "surname" as const, value: surname.trim() });
-    if (suffix.trim()) nameComponents.push({ kind: "suffix" as const, value: suffix.trim() });
+    if (suffix.trim()) nameComponents.push({ kind: "generation" as const, value: suffix.trim() });
 
     const titlesMap: Record<string, { name: string; kind?: "title" | "role" }> = {};
     if (jobTitle.trim()) titlesMap["t0"] = { name: jobTitle.trim(), kind: "title" };
@@ -427,6 +497,17 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
       });
     }
 
+    const mediaMap: Record<string, ContactMedia> = {};
+    if (contact?.media) {
+      for (const [key, m] of Object.entries(contact.media)) {
+        if (m.kind !== "photo") mediaMap[key] = m;
+      }
+    }
+    if (photoUri) {
+      const photoKey = initialPhotoEntry?.key || "photo";
+      mediaMap[photoKey] = { kind: "photo", uri: photoUri, mediaType: photoMediaType };
+    }
+
     const data: Partial<ContactCard> = {
       name: { components: nameComponents, isOrdered: true },
       nicknames: nickname.trim() ? { n0: { name: nickname.trim() } } : undefined,
@@ -453,6 +534,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
       calendarUri: calendarUri.trim() || undefined,
       schedulingUri: schedulingUri.trim() || undefined,
       freeBusyUri: freeBusyUri.trim() || undefined,
+      media: Object.keys(mediaMap).length > 0 ? mediaMap : undefined,
       ...(selectedBookId ? { addressBookIds: { [selectedBookId]: true } } : {}),
     };
 
@@ -466,6 +548,9 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
     }
   };
 
+  const previewName = [givenName, surname].filter(Boolean).join(" ").trim();
+  const previewEmail = emails.find(e => e.address.trim())?.address.trim() || "";
+
   return (
     <form onSubmit={handleSubmit} className="flex flex-col h-full bg-background">
       <div className="flex items-center justify-between px-6 py-4 border-b border-border flex-shrink-0">
@@ -478,38 +563,82 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
       </div>
 
       <div className="flex-1 overflow-y-auto">
-        <div className="px-6 py-4">
+        <div className="px-6 py-4 max-w-3xl">
           {error && (
             <div className="text-sm text-red-600 dark:text-red-400 bg-red-50 dark:bg-red-950 px-3 py-2 rounded-lg border border-red-200 dark:border-red-900 mb-4">
               {error}
             </div>
           )}
 
-          <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-3 gap-4">
-
-          {/* Address Book Selector */}
-          {addressBooks && addressBooks.length > 1 && (
-            <div className="md:col-span-2 xl:col-span-3">
-              <FormSection icon={Book} title={t("section_address_book") || "Directory"} category="contact">
-                <select
-                  value={selectedBookId}
-                  onChange={(e) => setSelectedBookId(e.target.value)}
-                  className="w-full px-3 py-2 rounded-md border border-border bg-background text-sm focus:outline-none focus:ring-2 focus:ring-primary/50"
+          <div className="flex items-center gap-4 pb-4">
+            <button
+              type="button"
+              onClick={() => photoInputRef.current?.click()}
+              disabled={photoUploading}
+              className="relative group rounded-full focus:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:opacity-60"
+              title={t("upload_photo")}
+              aria-label={t("upload_photo")}
+            >
+              <Avatar
+                name={previewName || undefined}
+                email={previewEmail || undefined}
+                contactPhotoUri={photoUri}
+                size="lg"
+                className="!w-20 !h-20 !text-xl"
+              />
+              <span
+                aria-hidden="true"
+                className="absolute inset-0 rounded-full bg-black/55 text-white flex flex-col items-center justify-center gap-0.5 opacity-0 group-hover:opacity-100 group-focus-visible:opacity-100 transition-opacity"
+              >
+                <Camera className="w-5 h-5" />
+                <span className="text-[10px] font-medium leading-none">{t("change_photo")}</span>
+              </span>
+              <input
+                ref={photoInputRef}
+                type="file"
+                accept="image/*"
+                className="hidden"
+                onChange={handlePhotoSelect}
+              />
+            </button>
+            <div className="flex flex-col gap-1 min-w-0 flex-1">
+              <p className="text-xs text-muted-foreground">{t("photo_hint")}</p>
+              {photoError && (
+                <p className="text-xs text-red-600 dark:text-red-400">{photoError}</p>
+              )}
+              {photoUri && (
+                <button
+                  type="button"
+                  onClick={handlePhotoRemove}
+                  className="inline-flex items-center gap-1 self-start text-xs text-muted-foreground hover:text-destructive transition-colors"
                 >
-                  <option value="">{t("select_address_book") || "Select a directory..."}</option>
-                  {addressBooks.map((book) => (
-                    <option key={book.id} value={book.id}>
-                      {book.accountName ? `${book.name} (${book.accountName})` : book.name}
-                    </option>
-                  ))}
-                </select>
-              </FormSection>
+                  <Trash2 className="w-3 h-3" />
+                  {t("remove_photo")}
+                </button>
+              )}
             </div>
+          </div>
+
+          <div className="divide-y divide-border/60">
+
+          {addressBooks && addressBooks.length > 1 && (
+            <FormSection icon={Book} title={t("section_address_book") || "Directory"}>
+              <select
+                value={selectedBookId}
+                onChange={(e) => setSelectedBookId(e.target.value)}
+                className="w-full px-3 py-2 rounded-md border border-border bg-background text-sm focus:outline-none focus:ring-2 focus:ring-primary/50"
+              >
+                <option value="">{t("select_address_book") || "Select a directory..."}</option>
+                {addressBooks.map((book) => (
+                  <option key={book.id} value={book.id}>
+                    {book.accountName ? `${book.name} (${book.accountName})` : book.name}
+                  </option>
+                ))}
+              </select>
+            </FormSection>
           )}
 
-          {/* Name & Identity - full width */}
-          <div className="md:col-span-2 xl:col-span-3">
-          <FormSection icon={User} title={t("section_identity")} category="contact">
+          <FormSection icon={User} title={t("section_identity")}>
             <div className="grid grid-cols-[auto_1fr_1fr_auto] gap-2">
               <div>
                 <label className="text-xs text-muted-foreground mb-1 block">{t("prefix")}</label>
@@ -543,10 +672,9 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
               </div>
             </div>
           </FormSection>
-          </div>
 
           {/* Email */}
-          <FormSection icon={Mail} title={t("email")} collapsible defaultOpen category="contact">
+          <FormSection icon={Mail} title={t("email")}>
             <div className="space-y-2">
               {emails.map((entry, i) => (
                 <div key={i}>
@@ -598,7 +726,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
           </FormSection>
 
           {/* Phone */}
-          <FormSection icon={Phone} title={t("phone")} collapsible defaultOpen category="contact">
+          <FormSection icon={Phone} title={t("phone")}>
             <div className="space-y-2">
               {phones.map((entry, i) => (
                 <div key={i} className="flex items-center gap-2">
@@ -656,7 +784,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
           </FormSection>
 
           {/* Work & Organization */}
-          <FormSection icon={Building} title={t("section_work")} collapsible defaultOpen category="work">
+          <FormSection icon={Building} title={t("section_work")} collapsible defaultOpen={!!(organization || department || jobTitle || role)}>
             <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
               <div>
                 <label className="text-xs text-muted-foreground mb-1 block">{t("organization")}</label>
@@ -677,9 +805,8 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
             </div>
           </FormSection>
 
-          {/* Addresses - full width */}
-          <div className="md:col-span-2 xl:col-span-3">
-          <FormSection icon={MapPin} title={t("addresses")} collapsible defaultOpen category="location">
+          {/* Addresses */}
+          <FormSection icon={MapPin} title={t("addresses")} collapsible defaultOpen={addresses.length > 0}>
             <div className="space-y-3">
               {addresses.map((addr, i) => (
                 <div key={i} className="rounded-md border border-border/60 bg-muted/20 p-3 space-y-2 relative">
@@ -711,10 +838,9 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
               </Button>
             </div>
           </FormSection>
-          </div>
 
           {/* Online Services */}
-          <FormSection icon={Globe} title={t("online_services")} collapsible defaultOpen category="digital">
+          <FormSection icon={Globe} title={t("online_services")} collapsible defaultOpen={onlineServices.length > 0}>
             <div className="space-y-2">
               {onlineServices.map((svc, i) => (
                 <div key={i} className="flex items-center gap-2">
@@ -743,7 +869,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
           </FormSection>
 
           {/* Anniversaries */}
-          <FormSection icon={Cake} title={t("anniversaries")} collapsible defaultOpen category="personal">
+          <FormSection icon={Cake} title={t("anniversaries")} collapsible defaultOpen={anniversaries.length > 0}>
             <div className="space-y-2">
               {anniversaries.map((ann, i) => (
                 <div key={i} className="flex items-center gap-2">
@@ -775,7 +901,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
           </FormSection>
 
           {/* Personal Info */}
-          <FormSection icon={Heart} title={t("personal_info")} collapsible defaultOpen category="personal">
+          <FormSection icon={Heart} title={t("personal_info")} collapsible defaultOpen={personalInfoEntries.length > 0}>
             <div className="space-y-2">
               {personalInfoEntries.map((pi, i) => (
                 <div key={i} className="flex items-center gap-2">
@@ -816,7 +942,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
           </FormSection>
 
           {/* Categories */}
-          <FormSection icon={Tag} title={t("categories")} collapsible defaultOpen category="digital">
+          <FormSection icon={Tag} title={t("categories")} collapsible defaultOpen={!!keywordsStr}>
             <CategoryComboBox
               keywordsStr={keywordsStr}
               onChange={setKeywordsStr}
@@ -828,7 +954,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
           </FormSection>
 
           {/* Gender */}
-          <FormSection icon={UserCircle} title={t("gender")} collapsible defaultOpen category="personal">
+          <FormSection icon={UserCircle} title={t("gender")} collapsible defaultOpen={!!(genderSex || genderIdentity)}>
             <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
               <div>
                 <label className="text-xs text-muted-foreground mb-1 block">{t("gender_sex")}</label>
@@ -849,7 +975,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
           </FormSection>
 
           {/* Calendar */}
-          <FormSection icon={Calendar} title={t("calendar")} collapsible defaultOpen category="calendar">
+          <FormSection icon={Calendar} title={t("calendar")} collapsible defaultOpen={!!(calendarUri || schedulingUri || freeBusyUri)}>
             <div className="space-y-3">
               <div>
                 <label className="text-xs text-muted-foreground mb-1 block">{t("calendar_uri")}</label>
@@ -866,9 +992,8 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
             </div>
           </FormSection>
 
-          {/* Notes - full width */}
-          <div className="md:col-span-2 xl:col-span-3">
-          <FormSection icon={StickyNote} title={t("note")} collapsible defaultOpen category="notes">
+          {/* Notes */}
+          <FormSection icon={StickyNote} title={t("note")} collapsible defaultOpen={!!note}>
             <textarea
               value={note}
               onChange={(e) => setNote(e.target.value)}
@@ -876,7 +1001,6 @@ export function ContactForm({ contact, addressBooks, allKeywords, onSave, onCanc
               className="w-full min-h-[100px] rounded-md border border-input bg-background px-3 py-2 text-sm text-foreground placeholder:text-muted-foreground resize-y outline-none focus:ring-2 focus:ring-ring"
             />
           </FormSection>
-          </div>
 
           </div>
         </div>

components/contacts/contact-list.tsx

@@ -1,18 +1,98 @@
 "use client";
 
-import { useMemo } from "react";
-import { useTranslations } from "next-intl";
-import { Search, BookUser, Trash2, Users, Download, X, UserPlus, CheckSquare, Square } from "lucide-react";
+import { useMemo, useState } from "react";
+import { useTranslations, useLocale } from "next-intl";
+import { Search, BookUser, Trash2, Users, Download, X, UserPlus, CheckSquare, Square, Filter, Mail, Phone, Image as ImageIcon, RotateCcw } from "lucide-react";
 import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
 import { ContactListItem } from "./contact-list-item";
 import { ContactContextMenu } from "./contact-context-menu";
 import { useContextMenu } from "@/hooks/use-context-menu";
 import { cn } from "@/lib/utils";
-import type { ContactCard } from "@/lib/jmap/types";
-import { getContactDisplayName } from "@/stores/contact-store";
+import type { AnniversaryDate, ContactCard } from "@/lib/jmap/types";
+import { getContactDisplayName, getContactPhotoUri } from "@/stores/contact-store";
 import { useSettingsStore } from "@/stores/settings-store";
 
+type TriState = boolean | null;
+
+interface ListFilters {
+  organization: string;
+  jobTitle: string;
+  location: string;
+  emailDomain: string;
+  birthdayMonth: number | null;
+  hasEmail: TriState;
+  hasPhone: TriState;
+  hasPhoto: TriState;
+}
+
+const EMPTY_FILTERS: ListFilters = {
+  organization: "",
+  jobTitle: "",
+  location: "",
+  emailDomain: "",
+  birthdayMonth: null,
+  hasEmail: null,
+  hasPhone: null,
+  hasPhoto: null,
+};
+
+function cycleTri(v: TriState): TriState {
+  return v === null ? true : v === true ? false : null;
+}
+
+function countActiveFilters(f: ListFilters): number {
+  let n = 0;
+  if (f.organization.trim()) n++;
+  if (f.jobTitle.trim()) n++;
+  if (f.location.trim()) n++;
+  if (f.emailDomain.trim()) n++;
+  if (f.birthdayMonth !== null) n++;
+  if (f.hasEmail !== null) n++;
+  if (f.hasPhone !== null) n++;
+  if (f.hasPhoto !== null) n++;
+  return n;
+}
+
+function matchTri(actual: boolean, filter: TriState): boolean {
+  if (filter === null) return true;
+  return actual === filter;
+}
+
+function getAnniversaryMonth(date: AnniversaryDate): number | null {
+  if (typeof date === "string") {
+    const iso = date.match(/^(\d{4})-(\d{2})/);
+    if (iso) return parseInt(iso[2], 10);
+    const partial = date.match(/^--(\d{2})/);
+    if (partial) return parseInt(partial[1], 10);
+    return null;
+  }
+  if ("month" in date && date.month) return date.month;
+  if ("utc" in date && date.utc) {
+    const d = new Date(date.utc);
+    return isNaN(d.getTime()) ? null : d.getMonth() + 1;
+  }
+  return null;
+}
+
+function ToggleChip({ icon, label, value, onClick }: { icon: React.ReactNode; label: string; value: TriState; onClick: () => void }) {
+  return (
+    <button
+      type="button"
+      onClick={onClick}
+      className={cn(
+        "inline-flex items-center gap-1.5 px-2.5 py-1 rounded-full text-xs transition-colors border",
+        value === true && "bg-primary/10 border-primary/30 text-primary",
+        value === false && "bg-muted border-border text-muted-foreground line-through",
+        value === null && "bg-background border-border text-muted-foreground hover:text-foreground hover:border-muted-foreground",
+      )}
+    >
+      {icon}
+      {label}
+    </button>
+  );
+}
+
 interface ContactListProps {
   contacts: ContactCard[];
   selectedContactId: string | null;
@@ -20,7 +100,6 @@ interface ContactListProps {
   onSearchChange: (query: string) => void;
   onSelectContact: (id: string) => void;
   onCreateNew: () => void;
-  categoryLabel: string;
   className?: string;
   selectedContactIds: Set<string>;
   onToggleSelection: (id: string) => void;
@@ -42,7 +121,6 @@ export function ContactList({
   onSearchChange,
   onSelectContact,
   onCreateNew,
-  categoryLabel,
   className,
   selectedContactIds,
   onToggleSelection,
@@ -57,31 +135,94 @@ export function ContactList({
   onAddContactToGroup,
 }: ContactListProps) {
   const t = useTranslations("contacts");
+  const locale = useLocale();
   const density = useSettingsStore((state) => state.density);
+  const groupByLetter = useSettingsStore((state) => state.groupContactsByLetter);
   const { contextMenu, openContextMenu, closeContextMenu, menuRef } = useContextMenu<ContactCard>();
+  const [filtersOpen, setFiltersOpen] = useState(false);
+  const [filters, setFilters] = useState<ListFilters>(EMPTY_FILTERS);
+  const activeFilters = countActiveFilters(filters);
+
+  const monthNames = useMemo(() => {
+    const fmt = new Intl.DateTimeFormat(locale, { month: "long" });
+    return Array.from({ length: 12 }, (_, i) => fmt.format(new Date(2000, i, 1)));
+  }, [locale]);
 
   const filtered = useMemo(() => {
-    if (!searchQuery) return contacts;
-    const lower = searchQuery.toLowerCase();
+    const lower = searchQuery.trim().toLowerCase();
+    const orgLower = filters.organization.trim().toLowerCase();
+    const jobLower = filters.jobTitle.trim().toLowerCase();
+    const locLower = filters.location.trim().toLowerCase();
+    const domainLower = filters.emailDomain.trim().toLowerCase().replace(/^@/, "");
+
     return contacts.filter((c) => {
+      const emails = c.emails ? Object.values(c.emails) : [];
+      const phones = c.phones ? Object.values(c.phones) : [];
+      const orgs = c.organizations ? Object.values(c.organizations) : [];
+      const titles = c.titles ? Object.values(c.titles) : [];
+      const addresses = c.addresses ? Object.values(c.addresses) : [];
+      const anniversaries = c.anniversaries ? Object.values(c.anniversaries) : [];
+
+      if (!matchTri(emails.length > 0, filters.hasEmail)) return false;
+      if (!matchTri(phones.length > 0, filters.hasPhone)) return false;
+      if (!matchTri(!!getContactPhotoUri(c), filters.hasPhoto)) return false;
+
+      if (orgLower) {
+        const match = orgs.some((o) => {
+          if (o.name?.toLowerCase().includes(orgLower)) return true;
+          if (o.units?.some((u) => u.name?.toLowerCase().includes(orgLower))) return true;
+          return false;
+        });
+        if (!match) return false;
+      }
+
+      if (jobLower) {
+        if (!titles.some((ti) => ti.name?.toLowerCase().includes(jobLower))) return false;
+      }
+
+      if (locLower) {
+        const match = addresses.some((a) => {
+          const parts: string[] = [];
+          if (a.full) parts.push(a.full);
+          if (a.fullAddress) parts.push(a.fullAddress);
+          if (a.locality) parts.push(a.locality);
+          if (a.region) parts.push(a.region);
+          if (a.country) parts.push(a.country);
+          if (a.postcode) parts.push(a.postcode);
+          if (a.street) parts.push(a.street);
+          if (a.components) {
+            for (const comp of a.components) {
+              if (comp.value) parts.push(comp.value);
+            }
+          }
+          return parts.some((p) => p.toLowerCase().includes(locLower));
+        });
+        if (!match) return false;
+      }
+
+      if (domainLower) {
+        const match = emails.some((e) => {
+          const at = e.address?.toLowerCase().split("@");
+          return at && at.length > 1 && at[1].includes(domainLower);
+        });
+        if (!match) return false;
+      }
+
+      if (filters.birthdayMonth !== null) {
+        const target = filters.birthdayMonth;
+        const match = anniversaries.some((a) => a.kind === "birth" && getAnniversaryMonth(a.date) === target);
+        if (!match) return false;
+      }
+
+      if (!lower) return true;
       const name = getContactDisplayName(c).toLowerCase();
-      const emails = c.emails
-        ? Object.values(c.emails).map((e) => e.address.toLowerCase())
-        : [];
-      const phones = c.phones
-        ? Object.values(c.phones).map((p) => p.number?.toLowerCase() || "")
-        : [];
-      const org = c.organizations
-        ? Object.values(c.organizations).map((o) => o.name?.toLowerCase() || "")
-        : [];
-      return (
-        name.includes(lower) ||
-        emails.some((e) => e.includes(lower)) ||
-        phones.some((p) => p.includes(lower)) ||
-        org.some((o) => o.includes(lower))
-      );
+      if (name.includes(lower)) return true;
+      if (emails.some((e) => e.address?.toLowerCase().includes(lower))) return true;
+      if (phones.some((p) => p.number?.toLowerCase().includes(lower))) return true;
+      if (orgs.some((o) => o.name?.toLowerCase().includes(lower))) return true;
+      return false;
     });
-  }, [contacts, searchQuery]);
+  }, [contacts, searchQuery, filters]);
 
   const sorted = useMemo(() => {
     return [...filtered].sort((a, b) => {
@@ -93,29 +234,214 @@ export function ContactList({
 
   const sortedIds = useMemo(() => sorted.map(c => c.id), [sorted]);
 
+  // Group sorted contacts by first letter of display name. Non-letter
+  // starters (digits, symbols, empty) collect under "#" which sorts last.
+  const groupedSections = useMemo(() => {
+    const collator = new Intl.Collator(locale, { sensitivity: "base" });
+    const groups = new Map<string, ContactCard[]>();
+    for (const contact of sorted) {
+      const name = getContactDisplayName(contact).trim();
+      const first = name.charAt(0);
+      const letter = first && first.toLocaleUpperCase(locale).match(/\p{L}/u)
+        ? first.toLocaleUpperCase(locale)
+        : "#";
+      const bucket = groups.get(letter);
+      if (bucket) bucket.push(contact);
+      else groups.set(letter, [contact]);
+    }
+    return Array.from(groups.entries())
+      .sort(([a], [b]) => {
+        if (a === "#") return 1;
+        if (b === "#") return -1;
+        return collator.compare(a, b);
+      })
+      .map(([letter, items]) => ({ letter, items }));
+  }, [sorted, locale]);
+
   const hasSelection = selectedContactIds.size > 0;
   const allSelected = sorted.length > 0 && sorted.every(c => selectedContactIds.has(c.id));
 
   return (
     <div className={cn("flex flex-col h-full", className)}>
-      {/* Search header */}
-      <div className="px-3 border-b border-border space-y-1.5" style={{ paddingBlock: 'var(--density-header-py)' }}>
-        <div className="flex items-center justify-between">
-          <span className="text-xs font-medium text-muted-foreground truncate">
-            {categoryLabel} ({contacts.length})
-          </span>
-        </div>
-        <div className="relative">
-          <Search className="absolute left-2.5 top-1/2 -translate-y-1/2 w-3.5 h-3.5 text-muted-foreground" />
-          <Input
-            placeholder={t("search_placeholder")}
-            value={searchQuery}
-            onChange={(e) => onSearchChange(e.target.value)}
-            className="pl-8 h-8 text-sm"
-          />
+      {/* Toolbar: select / search / filter */}
+      <div className="border-b border-border bg-background">
+        <div className="px-3 py-3">
+          <div className="flex items-center gap-1.5">
+            <button
+              type="button"
+              onClick={() => {
+                if (hasSelection) {
+                  if (allSelected) onClearSelection();
+                  else onSelectAll(sortedIds);
+                } else if (sortedIds.length > 0) {
+                  const target = selectedContactId && sortedIds.includes(selectedContactId)
+                    ? selectedContactId
+                    : sortedIds[0];
+                  onToggleSelection(target);
+                }
+              }}
+              className={cn(
+                "flex-shrink-0 p-2 rounded-md transition-colors",
+                hasSelection
+                  ? "bg-primary/10 text-primary"
+                  : "text-muted-foreground hover:text-foreground hover:bg-muted",
+              )}
+              title={hasSelection ? (allSelected ? t("bulk.clear") : t("bulk.select_all")) : t("filters.select")}
+            >
+              {hasSelection ? <CheckSquare className="w-4 h-4" /> : <Square className="w-4 h-4" />}
+            </button>
+            <div className="relative flex-1">
+              <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
+              <Input
+                type="text"
+                placeholder={t("search_placeholder")}
+                value={searchQuery}
+                onChange={(e) => onSearchChange(e.target.value)}
+                className={cn("pl-9 h-9", searchQuery && "pr-8")}
+              />
+              {searchQuery && (
+                <button
+                  type="button"
+                  onClick={() => onSearchChange("")}
+                  className="absolute right-2 top-1/2 -translate-y-1/2 p-1 rounded-full hover:bg-muted text-muted-foreground hover:text-foreground transition-colors"
+                  aria-label={t("clear_search")}
+                >
+                  <X className="w-4 h-4" />
+                </button>
+              )}
+            </div>
+            <button
+              type="button"
+              onClick={() => setFiltersOpen((v) => !v)}
+              className={cn(
+                "relative flex-shrink-0 p-2 rounded-md transition-colors",
+                filtersOpen || activeFilters > 0
+                  ? "bg-primary/10 text-primary"
+                  : "text-muted-foreground hover:text-foreground hover:bg-muted",
+              )}
+              title={t("filters.toggle")}
+              aria-label={t("filters.toggle")}
+            >
+              <Filter className="w-4 h-4" />
+              {!filtersOpen && activeFilters > 0 && (
+                <span className="absolute -top-1 -right-1 flex items-center justify-center w-4 h-4 text-[10px] font-bold rounded-full bg-primary text-primary-foreground">
+                  {activeFilters}
+                </span>
+              )}
+            </button>
+          </div>
         </div>
+
       </div>
 
+      {filtersOpen && (
+        <div className="border-b border-border bg-muted/30 animate-in slide-in-from-top-2 fade-in duration-200">
+          <div className="px-4 py-3 space-y-3">
+            <div className="flex items-center justify-between">
+              <span className="text-sm font-medium text-foreground">{t("filters.title")}</span>
+              <div className="flex items-center gap-1">
+                <Button
+                  variant="ghost"
+                  size="sm"
+                  onClick={() => setFilters(EMPTY_FILTERS)}
+                  className="h-7 px-2 text-xs"
+                >
+                  <RotateCcw className="w-3 h-3 mr-1" />
+                  {t("filters.clear")}
+                </Button>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  onClick={() => setFiltersOpen(false)}
+                  className="h-7 w-7"
+                  aria-label={t("filters.close")}
+                >
+                  <X className="w-4 h-4" />
+                </Button>
+              </div>
+            </div>
+
+            <div className="grid grid-cols-2 gap-2">
+              <div>
+                <label className="text-xs text-muted-foreground mb-1 block">{t("filters.organization")}</label>
+                <Input
+                  value={filters.organization}
+                  onChange={(e) => setFilters((f) => ({ ...f, organization: e.target.value }))}
+                  placeholder={t("filters.organization_placeholder")}
+                  className="h-8 text-sm"
+                />
+              </div>
+              <div>
+                <label className="text-xs text-muted-foreground mb-1 block">{t("filters.job_title")}</label>
+                <Input
+                  value={filters.jobTitle}
+                  onChange={(e) => setFilters((f) => ({ ...f, jobTitle: e.target.value }))}
+                  placeholder={t("filters.job_title_placeholder")}
+                  className="h-8 text-sm"
+                />
+              </div>
+            </div>
+
+            <div className="grid grid-cols-2 gap-2">
+              <div>
+                <label className="text-xs text-muted-foreground mb-1 block">{t("filters.location")}</label>
+                <Input
+                  value={filters.location}
+                  onChange={(e) => setFilters((f) => ({ ...f, location: e.target.value }))}
+                  placeholder={t("filters.location_placeholder")}
+                  className="h-8 text-sm"
+                />
+              </div>
+              <div>
+                <label className="text-xs text-muted-foreground mb-1 block">{t("filters.email_domain")}</label>
+                <Input
+                  value={filters.emailDomain}
+                  onChange={(e) => setFilters((f) => ({ ...f, emailDomain: e.target.value }))}
+                  placeholder={t("filters.email_domain_placeholder")}
+                  className="h-8 text-sm"
+                />
+              </div>
+            </div>
+
+            <div>
+              <label className="text-xs text-muted-foreground mb-1 block">{t("filters.birthday_month")}</label>
+              <select
+                value={filters.birthdayMonth ?? ""}
+                onChange={(e) => setFilters((f) => ({ ...f, birthdayMonth: e.target.value === "" ? null : Number(e.target.value) }))}
+                className="h-8 w-full text-sm rounded-md border border-input bg-background px-2"
+                aria-label={t("filters.birthday_month")}
+              >
+                <option value="">{t("filters.any_month")}</option>
+                {monthNames.map((name, i) => (
+                  <option key={i} value={i + 1}>{name}</option>
+                ))}
+              </select>
+            </div>
+
+            <div className="flex items-center gap-2 flex-wrap">
+              <ToggleChip
+                icon={<Mail className="w-3.5 h-3.5" />}
+                label={t("filters.has_email")}
+                value={filters.hasEmail}
+                onClick={() => setFilters((f) => ({ ...f, hasEmail: cycleTri(f.hasEmail) }))}
+              />
+              <ToggleChip
+                icon={<Phone className="w-3.5 h-3.5" />}
+                label={t("filters.has_phone")}
+                value={filters.hasPhone}
+                onClick={() => setFilters((f) => ({ ...f, hasPhone: cycleTri(f.hasPhone) }))}
+              />
+              <ToggleChip
+                icon={<ImageIcon className="w-3.5 h-3.5" />}
+                label={t("filters.has_photo")}
+                value={filters.hasPhoto}
+                onClick={() => setFilters((f) => ({ ...f, hasPhoto: cycleTri(f.hasPhoto) }))}
+              />
+            </div>
+          </div>
+        </div>
+      )}
+
       {/* Bulk action bar */}
       {hasSelection && (
         <div className="px-3 py-1.5 border-b border-border bg-accent/30 flex items-center gap-2 flex-wrap">
@@ -166,19 +492,32 @@ export function ContactList({
       <div className="flex-1 overflow-y-auto">
         {sorted.length === 0 ? (
           <div className="flex flex-col items-center justify-center h-full px-6 text-center">
-            {searchQuery ? (
+            {searchQuery || activeFilters > 0 ? (
               <>
-                <Search className="w-10 h-10 mb-3 text-muted-foreground/30" />
-                <p className="text-sm font-medium text-foreground">{t("empty_search")}</p>
-                <p className="text-xs text-muted-foreground mt-1">{t("empty_search_hint")}</p>
-                <Button
-                  variant="outline"
-                  size="sm"
-                  className="mt-3"
-                  onClick={() => onSearchChange("")}
-                >
-                  {t("clear_search")}
-                </Button>
+                {activeFilters > 0 && !searchQuery ? (
+                  <Filter className="w-10 h-10 mb-3 text-muted-foreground/30" />
+                ) : (
+                  <Search className="w-10 h-10 mb-3 text-muted-foreground/30" />
+                )}
+                <p className="text-sm font-medium text-foreground">
+                  {searchQuery ? t("empty_search") : t("empty_filtered")}
+                </p>
+                <p className="text-xs text-muted-foreground mt-1">
+                  {searchQuery ? t("empty_search_hint") : t("empty_filtered_hint")}
+                </p>
+                <div className="flex gap-2 mt-3">
+                  {searchQuery && (
+                    <Button variant="outline" size="sm" onClick={() => onSearchChange("")}>
+                      {t("clear_search")}
+                    </Button>
+                  )}
+                  {activeFilters > 0 && (
+                    <Button variant="outline" size="sm" onClick={() => setFilters(EMPTY_FILTERS)}>
+                      <RotateCcw className="w-3.5 h-3.5 mr-1" />
+                      {t("filters.clear")}
+                    </Button>
+                  )}
+                </div>
               </>
             ) : (
               <>
@@ -193,8 +532,8 @@ export function ContactList({
             )}
           </div>
         ) : (
-          <div>
-            {sorted.map((contact) => (
+          (() => {
+            const renderItem = (contact: ContactCard) => (
               <ContactListItem
                 key={contact.id}
                 contact={contact}
@@ -221,8 +560,22 @@ export function ContactList({
                 }}
                 onContextMenu={(e, c) => openContextMenu(e, c)}
               />
-            ))}
-          </div>
+            );
+            return groupByLetter ? (
+              <div>
+                {groupedSections.map(({ letter, items }) => (
+                  <section key={letter}>
+                    <div className="sticky top-0 z-10 px-4 py-0.5 bg-background/90 backdrop-blur-sm text-[11px] font-medium text-muted-foreground/70 uppercase tracking-wide">
+                      {letter}
+                    </div>
+                    {items.map(renderItem)}
+                  </section>
+                ))}
+              </div>
+            ) : (
+              <div>{sorted.map(renderItem)}</div>
+            );
+          })()
         )}
       </div>
 

components/contacts/contact-print.ts

@@ -0,0 +1,120 @@
+import type { ContactCard, PartialDate } from "@/lib/jmap/types";
+import { getContactDisplayName, getContactPhotoUri } from "@/stores/contact-store";
+
+function escapeHtml(value: string): string {
+  return value
+    .replace(/&/g, "&")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;")
+    .replace(/'/g, "&#39;");
+}
+
+export function printContact(contact: ContactCard, displayName?: string): void {
+  const printWindow = window.open("", "_blank");
+  if (!printWindow) return;
+
+  const name = displayName || getContactDisplayName(contact);
+  const photoUri = getContactPhotoUri(contact);
+  const emails = contact.emails ? Object.values(contact.emails) : [];
+  const phones = contact.phones ? Object.values(contact.phones) : [];
+  const orgs = contact.organizations ? Object.values(contact.organizations) : [];
+  const titles = contact.titles ? Object.values(contact.titles) : [];
+  const addresses = contact.addresses ? Object.values(contact.addresses) : [];
+  const onlineServices = contact.onlineServices ? Object.values(contact.onlineServices) : [];
+  const notes = contact.notes ? Object.values(contact.notes) : [];
+  const anniversaries = contact.anniversaries ? Object.values(contact.anniversaries) : [];
+
+  const rows: string[] = [];
+  const section = (title: string, items: string[]) => {
+    if (items.length === 0) return;
+    rows.push(`<section><h2>${escapeHtml(title)}</h2><dl>${items.join("")}</dl></section>`);
+  };
+  const row = (label: string, value: string) =>
+    `<dt>${escapeHtml(label)}</dt><dd>${escapeHtml(value)}</dd>`;
+
+  section("Email", emails.map(e => row(e.label || "Email", e.address || "")));
+  section("Phone", phones.map(p => row(p.label || "Phone", p.number || "")));
+  section(
+    "Organization",
+    orgs.map(o => {
+      const units = o.units ? Object.values(o.units).map(u => u.name).filter(Boolean).join(", ") : "";
+      const value = [o.name, units].filter(Boolean).join(" \u2014 ");
+      return row("Organization", value);
+    }),
+  );
+  section("Title", titles.map(t => row(t.kind === "role" ? "Role" : "Title", t.name || "")));
+  section(
+    "Address",
+    addresses.map(a => {
+      const parts = [a.street, a.locality, a.region, a.postcode, a.country]
+        .map(p => (typeof p === "string" ? p : ""))
+        .filter(Boolean);
+      return row(a.label || "Address", parts.join(", "));
+    }),
+  );
+  section(
+    "Online",
+    onlineServices.map(s => row(s.label || s.service || "Online", s.uri || s.user || "")),
+  );
+  section(
+    "Anniversary",
+    anniversaries.map(a => {
+      const date = a.date;
+      let formatted = "";
+      if (typeof date === "object" && date !== null) {
+        if ("utc" in date && typeof date.utc === "string") formatted = date.utc;
+        else {
+          const parts: string[] = [];
+          const pd = date as PartialDate;
+          if (pd.year) parts.push(String(pd.year));
+          if (pd.month) parts.push(String(pd.month).padStart(2, "0"));
+          if (pd.day) parts.push(String(pd.day).padStart(2, "0"));
+          formatted = parts.join("-");
+        }
+      } else if (date) {
+        formatted = String(date);
+      }
+      return row(a.kind || "Date", formatted);
+    }),
+  );
+  section("Notes", notes.map(n => row("", n.note || "")));
+
+  const photoTag = photoUri
+    ? `<img class="photo" src="${escapeHtml(photoUri)}" alt="" />`
+    : `<div class="photo placeholder">${escapeHtml((name || "?").charAt(0).toUpperCase())}</div>`;
+
+  const html = `<!doctype html>
+<html>
+<head>
+<meta charset="utf-8" />
+<title>${escapeHtml(name || "Contact")}</title>
+<style>
+  * { box-sizing: border-box; }
+  body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: #111; margin: 32px; }
+  header { display: flex; align-items: center; gap: 20px; padding-bottom: 16px; border-bottom: 1px solid #ccc; }
+  .photo { width: 96px; height: 96px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
+  .photo.placeholder { background: #e5e7eb; color: #4b5563; display: flex; align-items: center; justify-content: center; font-size: 36px; font-weight: 600; }
+  h1 { margin: 0; font-size: 22px; }
+  section { margin-top: 20px; }
+  h2 { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: #555; margin: 0 0 8px; }
+  dl { margin: 0; display: grid; grid-template-columns: 140px 1fr; row-gap: 6px; column-gap: 16px; font-size: 14px; }
+  dt { color: #555; }
+  dd { margin: 0; word-break: break-word; }
+  @media print { body { margin: 16mm; } }
+</style>
+</head>
+<body>
+<header>
+  ${photoTag}
+  <div><h1>${escapeHtml(name || "Contact")}</h1></div>
+</header>
+${rows.join("")}
+</body>
+</html>`;
+
+  printWindow.document.write(html);
+  printWindow.document.close();
+  printWindow.focus();
+  printWindow.print();
+}

components/contacts/contacts-sidebar.tsx

@@ -27,6 +27,9 @@ interface ContactsSidebarProps {
   onDropContacts?: (contactIds: string[], addressBook: AddressBook) => void;
   onDropContactsToCategory?: (contactIds: string[], keyword: string) => void;
   onRenameAddressBook?: (addressBook: AddressBook) => void;
+  onShareAddressBook?: (addressBook: AddressBook) => void;
+  onCreateContactInBook?: (addressBook: AddressBook) => void;
+  onDeleteAddressBook?: (addressBook: AddressBook) => void;
   onRenameKeyword?: (keyword: string) => void;
   className?: string;
 }
@@ -62,6 +65,9 @@ export function ContactsSidebar({
   onDropContacts,
   onDropContactsToCategory,
   onRenameAddressBook,
+  onShareAddressBook,
+  onCreateContactInBook,
+  onDeleteAddressBook,
   onRenameKeyword,
   className,
 }: ContactsSidebarProps) {
@@ -288,7 +294,7 @@ export function ContactsSidebar({
                 contactCount={contactCountByBook[book.id] || 0}
                 onSelect={() => onSelectCategory({ addressBookId: book.id })}
                 onDropContacts={onDropContacts}
-                onContextMenu={onRenameAddressBook ? (e) => openBookContextMenu(e, book) : undefined}
+                onContextMenu={(onRenameAddressBook || onShareAddressBook || onCreateContactInBook || onDeleteAddressBook) ? (e) => openBookContextMenu(e, book) : undefined}
               />
             ))}
           </div>
@@ -430,7 +436,7 @@ export function ContactsSidebar({
                 contactCount={contactCountByBook[book.id] || 0}
                 onSelect={() => onSelectCategory({ addressBookId: book.id })}
                 onDropContacts={onDropContacts}
-                onContextMenu={onRenameAddressBook ? (e) => openBookContextMenu(e, book) : undefined}
+                onContextMenu={(onRenameAddressBook || onShareAddressBook || onCreateContactInBook || onDeleteAddressBook) ? (e) => openBookContextMenu(e, book) : undefined}
               />
             ))}
           </div>
@@ -438,24 +444,65 @@ export function ContactsSidebar({
       </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>
-      )}
+      {bookContextMenu.data && (onRenameAddressBook || onShareAddressBook || onCreateContactInBook || onDeleteAddressBook) && (() => {
+        const book = bookContextMenu.data;
+        const canCreate = onCreateContactInBook && book.myRights?.mayWrite !== false;
+        const canRename = onRenameAddressBook && book.myRights?.mayWrite !== false;
+        const canShare = onShareAddressBook && book.myRights?.mayShare && !book.isShared;
+        const canDelete = onDeleteAddressBook && !book.isDefault && !book.isShared && book.myRights?.mayDelete !== false;
+        const showSeparator = (canCreate || canRename || canShare) && canDelete;
+        return (
+          <ContextMenu
+            ref={bookMenuRef}
+            isOpen={bookContextMenu.isOpen}
+            position={bookContextMenu.position}
+            onClose={closeBookContextMenu}
+          >
+            {canCreate && (
+              <ContextMenuItem
+                icon={UserPlus}
+                label={t("address_books.new_contact_in_book")}
+                onClick={() => {
+                  closeBookContextMenu();
+                  onCreateContactInBook(book);
+                }}
+              />
+            )}
+            {canRename && (
+              <ContextMenuItem
+                icon={Pencil}
+                label={t("address_books.rename")}
+                onClick={() => {
+                  closeBookContextMenu();
+                  onRenameAddressBook(book);
+                }}
+              />
+            )}
+            {canShare && (
+              <ContextMenuItem
+                icon={Users}
+                label={t("address_books.share")}
+                onClick={() => {
+                  closeBookContextMenu();
+                  onShareAddressBook(book);
+                }}
+              />
+            )}
+            {showSeparator && <ContextMenuSeparator />}
+            {canDelete && (
+              <ContextMenuItem
+                icon={Trash2}
+                label={t("address_books.delete")}
+                onClick={() => {
+                  closeBookContextMenu();
+                  onDeleteAddressBook(book);
+                }}
+                destructive
+              />
+            )}
+          </ContextMenu>
+        );
+      })()}
 
       {/* Keyword (category) context menu */}
       {keywordContextMenu.data && onRenameKeyword && (

components/email/calendar-invitation-banner.tsx

@@ -15,6 +15,7 @@ import {
   X,
   AlertCircle,
   ChevronDown,
+  ChevronUp,
 } from 'lucide-react';
 import { useTranslations, useFormatter } from 'next-intl';
 import { useRouter } from '@/i18n/navigation';
@@ -372,6 +373,7 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
   const [showCalendarPicker, setShowCalendarPicker] = useState(false);
   const [selectedCalendarId, setSelectedCalendarId] = useState<string>('');
   const [rawIcsMethod, setRawIcsMethod] = useState<InvitationMethod>('unknown');
+  const [isCollapsed, setIsCollapsed] = useState(true);
 
   const attachment = findCalendarAttachment(email);
 
@@ -442,6 +444,8 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
   const summary = parsedEvent ? formatEventSummary(parsedEvent) : null;
   const isCancellation = method === 'cancel';
   const isResponseOnly = method === 'reply' || method === 'refresh' || method === 'counter' || method === 'declinecounter';
+  const canCollapse = method === 'reply';
+  const showDetails = !canCollapse || !isCollapsed;
   const allowsRsvp = method === 'request';
   const allowsImport = method === 'request' || method === 'publish' || method === 'add' || method === 'unknown';
 
@@ -750,9 +754,22 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
           )}
           <span className="text-sm font-medium text-foreground truncate">{bannerTitle}</span>
         </div>
+        {canCollapse && (
+          <button
+            type="button"
+            onClick={() => setIsCollapsed((prev) => !prev)}
+            aria-expanded={!isCollapsed}
+            aria-label={isCollapsed ? t('expand') : t('collapse')}
+            title={isCollapsed ? t('expand') : t('collapse')}
+            className="p-1 rounded-md text-muted-foreground hover:text-foreground hover:bg-muted/50 transition-colors flex-shrink-0"
+          >
+            {isCollapsed ? <ChevronDown className="w-4 h-4" /> : <ChevronUp className="w-4 h-4" />}
+          </button>
+        )}
       </div>
 
       {/* Content */}
+      {showDetails && (
       <div className="px-4 py-3 space-y-2.5">
         <div className="lg:flex lg:gap-6">
           {/* Left: Event info */}
@@ -894,8 +911,10 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
           </div>
         )}
       </div>
+      )}
 
       {/* Actions */}
+      {showDetails && (
       <div className="px-4 py-2.5 border-t border-border bg-muted/20 flex items-center gap-2 flex-wrap">
         {canRespond && (
           <>
@@ -1020,6 +1039,7 @@ export function CalendarInvitationBanner({ email }: CalendarInvitationBannerProp
           <Loader2 className="w-4 h-4 animate-spin text-muted-foreground ml-auto" />
         )}
       </div>
+      )}
     </div>
   );
 }

components/email/email-composer.tsx

@@ -31,6 +31,7 @@ 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 { computeReplyThreadingHeaders } from "@/lib/email-threading";
 import { RichTextEditor } from "@/components/email/rich-text-editor";
 
 /** Strip HTML tags and decode entities to get a plain-text version */
@@ -67,6 +68,8 @@ interface EmailComposerProps {
     fromName?: string;
     identityId?: string;
     attachments?: Array<{ blobId: string; name: string; type: string; size: number; disposition?: 'attachment' | 'inline'; cid?: string }>;
+    inReplyTo?: string[];
+    references?: string[];
   }) => void | Promise<void>;
   onClose?: () => void;
   onDiscardDraft?: (draftId: string) => void;
@@ -87,6 +90,11 @@ interface EmailComposerProps {
     receivedAt?: string;
     accountId?: string;
     attachments?: Array<{ blobId: string; name?: string; type: string; size: number; cid?: string; disposition?: string }>;
+    // Threading: parent's Message-ID and References, used to set RFC 5322
+    // In-Reply-To and References on outgoing replies. See #234.
+    messageId?: string;
+    inReplyTo?: string[];
+    references?: string[];
   };
 }
 
@@ -116,6 +124,7 @@ export function EmailComposer({
   const tCommon = useTranslations('common');
   const timeFormat = useSettingsStore((state) => state.timeFormat);
   const plainTextMode = useSettingsStore((state) => state.plainTextMode);
+  const subAddressDelimiter = useSettingsStore((state) => state.subAddressDelimiter);
   const autoSelectReplyIdentity = useSettingsStore((state) => state.autoSelectReplyIdentity);
   const attachmentReminderEnabled = useSettingsStore((state) => state.attachmentReminderEnabled);
   const attachmentReminderKeywords = useSettingsStore((state) => state.attachmentReminderKeywords);
@@ -721,7 +730,7 @@ export function EmailComposer({
     // Generate sub-addressed email if tag is set
     const fromEmail = currentIdentity?.email
       ? subAddressTag
-        ? generateSubAddress(currentIdentity.email, subAddressTag)
+        ? generateSubAddress(currentIdentity.email, subAddressTag, subAddressDelimiter)
         : currentIdentity.email
       : undefined;
 
@@ -736,7 +745,8 @@ export function EmailComposer({
         fromEmail,
         draftId || undefined,
         uploadedAttachments,
-        currentIdentity?.name || undefined
+        currentIdentity?.name || undefined,
+        plainTextMode ? undefined : body
       );
 
       setDraftId(savedDraftId);
@@ -812,19 +822,27 @@ export function EmailComposer({
     attachments: Array<{ blobId: string; name: string; type: string; size: number; disposition: 'inline'; cid: string }>;
   } => {
     const known = inlineImagesRef.current;
-    if (known.length === 0) return { html, attachments: [] };
-
     const doc = new DOMParser().parseFromString(`<body>${html}</body>`, 'text/html');
     const used = new Map<string, typeof known[number]>();
 
-    doc.querySelectorAll('img[data-cid]').forEach((img) => {
-      const cid = img.getAttribute('data-cid');
-      if (!cid) return;
-      const entry = known.find((e) => e.cid === cid);
-      if (!entry) return;
-      img.setAttribute('src', `cid:${cid}`);
-      img.removeAttribute('data-cid');
-      used.set(cid, entry);
+    if (known.length > 0) {
+      doc.querySelectorAll('img[data-cid]').forEach((img) => {
+        const cid = img.getAttribute('data-cid');
+        if (!cid) return;
+        const entry = known.find((e) => e.cid === cid);
+        if (!entry) return;
+        img.setAttribute('src', `cid:${cid}`);
+        img.removeAttribute('data-cid');
+        used.set(cid, entry);
+      });
+    }
+
+    // Recipient mail clients apply default <p> margins inside table cells,
+    // inflating row height. Tiptap wraps cell text in <p>, so force margin:0
+    // to match the composer's tight rows.
+    doc.querySelectorAll('td > p, th > p').forEach((p) => {
+      const existing = p.getAttribute('style') || '';
+      p.setAttribute('style', `margin:0;${existing}`);
     });
 
     return {
@@ -889,7 +907,7 @@ export function EmailComposer({
 
     const fromEmail = currentIdentity?.email
       ? subAddressTag
-        ? generateSubAddress(currentIdentity.email, subAddressTag)
+        ? generateSubAddress(currentIdentity.email, subAddressTag, subAddressDelimiter)
         : currentIdentity.email
       : undefined;
 
@@ -905,6 +923,11 @@ export function EmailComposer({
       return '';
     };
 
+    // RFC 5322 §3.6.4 threading — only continues the chain on a reply, not a forward.
+    const threadingHeaders = (mode === 'reply' || mode === 'replyAll')
+      ? computeReplyThreadingHeaders(replyTo)
+      : null;
+
     // In plain text mode, send text/plain only (no HTML body)
     const finalBody = plainTextMode
       ? appendPlainTextSignature(body, currentIdentity)
@@ -968,12 +991,22 @@ export function EmailComposer({
         }
 
         // 4. Build canonical MIME
+        // mime-builder takes inReplyTo as a single ref-form msg-id (with brackets);
+        // references stays an array. threadingHeaders contains bare msg-ids.
+        const mimeInReplyTo = threadingHeaders?.inReplyTo[0]
+          ? `<${threadingHeaders.inReplyTo[0]}>`
+          : undefined;
+        const mimeReferences = threadingHeaders?.references.length
+          ? threadingHeaders.references.map(id => `<${id}>`)
+          : undefined;
         const mimeBytes = buildMimeMessage({
           from: { name: currentIdentity.name || undefined, email: fromEmail || currentIdentity.email },
           to: toAddresses.map(e => ({ email: e })),
           cc: ccAddresses.length > 0 ? ccAddresses.map(e => ({ email: e })) : undefined,
           bcc: bccAddresses.length > 0 ? bccAddresses.map(e => ({ email: e })) : undefined,
           subject,
+          inReplyTo: mimeInReplyTo,
+          references: mimeReferences,
           textBody: finalBody,
           htmlBody: finalHtmlBody,
           attachments: mimeAttachments.length > 0 ? mimeAttachments : undefined,
@@ -986,6 +1019,8 @@ export function EmailComposer({
           to: toAddresses.map(e => ({ email: e })),
           cc: ccAddresses.length > 0 ? ccAddresses.map(e => ({ email: e })) : undefined,
           subject,
+          inReplyTo: mimeInReplyTo,
+          references: mimeReferences,
         };
 
         // 5. Sign if enabled
@@ -1042,6 +1077,8 @@ export function EmailComposer({
           fromName: currentIdentity?.name || undefined,
           identityId: currentIdentity?.id,
           attachments: uploadedAttachments.length > 0 ? uploadedAttachments : undefined,
+          inReplyTo: threadingHeaders?.inReplyTo,
+          references: threadingHeaders?.references,
         });
       }
 
@@ -1100,8 +1137,14 @@ export function EmailComposer({
   };
 
   return (
+    <div className={cn("flex h-full bg-background", className)}>
+      <PluginSlot
+        name="composer-sidebar"
+        className="hidden md:flex shrink-0 h-full overflow-hidden border-r border-border"
+      />
+      {/* Right-side composer sidebar slot is rendered after the main content div below. */}
     <div
-      className={cn("flex flex-col h-full bg-background relative", className)}
+      className="flex flex-col h-full bg-background relative flex-1 min-w-0"
       data-tour="composer"
       onDragEnter={handleDragEnter}
       onDragLeave={handleDragLeave}
@@ -1173,7 +1216,7 @@ export function EmailComposer({
                 >
                   {identities.map((identity) => {
                     const displayEmail = subAddressTag
-                      ? generateSubAddress(identity.email, subAddressTag)
+                      ? generateSubAddress(identity.email, subAddressTag, subAddressDelimiter)
                       : identity.email;
                     return (
                       <option key={identity.id} value={identity.id}>
@@ -1186,7 +1229,7 @@ export function EmailComposer({
                 <span className="text-sm text-foreground flex-1 truncate">
                   {subAddressTag ? (
                     <span className="font-mono">
-                      {generateSubAddress(primaryIdentity?.email || '', subAddressTag)}
+                      {generateSubAddress(primaryIdentity?.email || '', subAddressTag, subAddressDelimiter)}
                     </span>
                   ) : (
                     <>
@@ -1674,6 +1717,11 @@ export function EmailComposer({
         </div>
       )}
     </div>
+      <PluginSlot
+        name="composer-sidebar-right"
+        className="hidden md:flex shrink-0 h-full overflow-hidden border-l border-border"
+      />
+    </div>
   );
 }
 

components/email/email-identity-badge.tsx

@@ -5,6 +5,7 @@ import { Mail, Tag } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import type { Email, Identity } from '@/lib/jmap/types';
 import { parseSubAddress } from '@/lib/sub-addressing';
+import { useSettingsStore } from '@/stores/settings-store';
 
 interface EmailIdentityBadgeProps {
   email: Email;
@@ -20,12 +21,13 @@ export function EmailIdentityBadge({
   className,
 }: EmailIdentityBadgeProps) {
   const t = useTranslations('identities.badge');
+  const subAddressDelimiter = useSettingsStore((state) => state.subAddressDelimiter);
 
   const fromAddress = email.from?.[0]?.email;
   if (!fromAddress) return null;
 
   // Parse the from address to check for sub-addressing
-  const parsedFrom = parseSubAddress(fromAddress);
+  const parsedFrom = parseSubAddress(fromAddress, subAddressDelimiter);
 
   // Find matching identity (email sent BY the user)
   const matchingIdentity = identities.find(
@@ -37,7 +39,7 @@ export function EmailIdentityBadge({
   if (!matchingIdentity) {
     // Check all TO addresses for sub-address tags matching user's identities
     for (const recipient of email.to || []) {
-      const parsedTo = parseSubAddress(recipient.email);
+      const parsedTo = parseSubAddress(recipient.email, subAddressDelimiter);
       if (parsedTo.tag) {
         // Check if this base email matches any of the user's identities
         const matchingToIdentity = identities.find(
@@ -70,7 +72,7 @@ export function EmailIdentityBadge({
           title={t('sub_address_tag', { tag: displayTag })}
         >
           <Tag className="w-3 h-3" />
-          <span className="font-mono">+{displayTag}</span>
+          <span className="font-mono">{subAddressDelimiter}{displayTag}</span>
         </div>
       );
     }
@@ -114,7 +116,7 @@ export function EmailIdentityBadge({
           aria-label={t('sub_address_tag', { tag: displayTag })}
         >
           <Tag className="w-3 h-3" />
-          <span className="font-mono">{t('subaddress_tag', { tag: displayTag })}</span>
+          <span className="font-mono">{subAddressDelimiter}{displayTag}</span>
         </div>
       )}
 

components/email/email-list-item.tsx

@@ -37,6 +37,7 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
   const density = useSettingsStore((state) => state.density);
   const mailLayout = useSettingsStore((state) => state.mailLayout);
   const emailKeywords = useSettingsStore((state) => state.emailKeywords);
+  const showAvatarsInJunk = useSettingsStore((state) => state.showAvatarsInJunk);
   const { identities } = useAuthStore();
   const isChecked = selectedEmailIds.has(email.id);
   const isUnread = !email.keywords?.$seen;
@@ -49,6 +50,7 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
   const showRecipient = currentMailboxRole === 'sent' || currentMailboxRole === 'drafts';
   const sender = showRecipient ? (email.to?.[0] ?? email.from?.[0]) : email.from?.[0];
   const isFocusedMailLayout = mailLayout === 'focus';
+  const hideJunkAvatarImages = currentMailboxRole === 'junk' && !showAvatarsInJunk;
   const inlinePreview = showPreview && email.preview ? ` ${email.preview}` : '';
 
   // Resolve color tags using keyword definitions from settings; unknown tags fall back to gray
@@ -99,7 +101,8 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
             : "bg-background"
         ),
         selected && !colorTag && "shadow-sm",
-        !colorTag && !selected && "hover:bg-muted hover:shadow-sm",
+        !colorTag && !selected && !isChecked && "hover:bg-muted hover:shadow-sm",
+        !colorTag && (selected || isChecked) && "hover:bg-accent hover:shadow-sm",
         colorTag && "hover:brightness-95 dark:hover:brightness-110",
         isUnread && !selected && !colorTag && "bg-warning/10",
         // Add visual feedback for checked state
@@ -163,6 +166,7 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
             email={sender?.email}
             size="md"
             className="flex-shrink-0 shadow-sm"
+            disableImages={hideJunkAvatarImages}
           />
         )}
 
@@ -284,7 +288,7 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
               </div>
 
               {/* Third Line: Preview (controlled by showPreview setting) */}
-              {showPreview && density !== 'extra-compact' && (
+              {showPreview && density !== 'extra-compact' && density !== 'compact' && (
                 <p className={cn(
                   "text-sm leading-relaxed line-clamp-2",
                   isUnread
@@ -302,7 +306,7 @@ export function EmailListItem({ email, selected, onClick, onContextMenu, onToggl
       {/* Hover Quick Actions */}
       <EmailHoverActions
         email={email}
-        backgroundClassName={colorTag ? colorTag : (selected ? "bg-selection" : "bg-muted")}
+        backgroundClassName={colorTag ? colorTag : ((selected || isChecked) ? "bg-accent" : "bg-muted")}
         onToggleStar={onToggleStar}
         onMarkAsRead={onMarkAsRead}
         onDelete={onDelete}

components/email/email-list.tsx

@@ -69,6 +69,7 @@ export function EmailList({
     batchMarkAsRead,
     batchDelete,
     batchMoveToMailbox,
+    batchArchive,
     batchMarkAsSpam,
     batchUndoSpam,
     loadMoreEmails,
@@ -497,12 +498,12 @@ export function EmailList({
           onBatchMarkAsRead={(read) => client && batchMarkAsRead(client, read)}
           onBatchDelete={() => client && batchDelete(client)}
           onBatchArchive={async () => {
-            if (!onArchive) return;
-            const selected = emails.filter((e) => selectedEmailIds.has(e.id));
-            for (const email of selected) {
-              await onArchive(email);
+            if (!client) return;
+            try {
+              await batchArchive(client);
+            } catch (error) {
+              console.error('Failed to batch archive:', error);
             }
-            clearSelection();
           }}
           onBatchMoveToMailbox={(mailboxId) => client && batchMoveToMailbox(client, mailboxId)}
           onBatchMarkAsSpam={async () => {

components/email/email-viewer.tsx

@@ -4,7 +4,7 @@ import { useState, useEffect, useLayoutEffect, useMemo, useRef, useCallback } fr
 import ReactDOM from "react-dom";
 import DOMPurify from "dompurify";
 import { Email, ContactCard, Mailbox } from "@/lib/jmap/types";
-import { EMAIL_SANITIZE_CONFIG, collapseBlockedImageContainers, plainTextToSafeHtml } from "@/lib/email-sanitization";
+import { EMAIL_IFRAME_SANITIZE_CONFIG, collapseBlockedImageContainers, plainTextToSafeHtml } from "@/lib/email-sanitization";
 import { hasMeaningfulHtmlBody } from "@/lib/signature-utils";
 import { Button } from "@/components/ui/button";
 import { Avatar } from "@/components/ui/avatar";
@@ -2285,7 +2285,7 @@ export function EmailViewer({
 
   // Sanitize and prepare email HTML content
   const emailContent = useMemo(() => {
-    if (!email) return { html: "", isHtml: false };
+    if (!email) return { html: "", isHtml: false, hasStyleTag: false };
 
     // Check if we have body values
     if (email.bodyValues) {
@@ -2322,7 +2322,7 @@ export function EmailViewer({
         let blockedExternalContent = false;
 
         // Use shared sanitization config as base (more secure)
-        const sanitizeConfig = { ...EMAIL_SANITIZE_CONFIG };
+        const sanitizeConfig = { ...EMAIL_IFRAME_SANITIZE_CONFIG };
 
         // Check if sender is trusted (localStorage list or address book)
         const senderEmail = email.from?.[0]?.email?.toLowerCase();
@@ -2338,8 +2338,7 @@ export function EmailViewer({
         );
 
         if (shouldBlockExternal) {
-          sanitizeConfig.FORBID_TAGS.push('link');
-          sanitizeConfig.FORBID_ATTR.push('background');
+          sanitizeConfig.FORBID_TAGS = [...sanitizeConfig.FORBID_TAGS, 'link'];
         }
 
         DOMPurify.addHook('afterSanitizeAttributes', (node) => {
@@ -2357,11 +2356,19 @@ export function EmailViewer({
               }
             }
 
+            const bgAttr = node.getAttribute?.('background');
+            if (bgAttr && (bgAttr.startsWith('http://') || bgAttr.startsWith('https://') || bgAttr.startsWith('//'))) {
+              node.setAttribute('data-blocked-background', bgAttr);
+              node.removeAttribute('background');
+              blockedExternalContent = true;
+            }
+
             if (htmlNode.style) {
               const style = htmlNode.style.cssText;
               if (style && style.includes('url(')) {
                 const urlMatch = style.match(/url\(['"]?(https?:\/\/[^'")\s]+)['"]?\)/gi);
                 if (urlMatch) {
+                  node.setAttribute('data-blocked-style', style);
                   htmlNode.style.cssText = style.replace(/url\(['"]?https?:\/\/[^'")\s]+['"]?\)/gi, 'url()');
                   blockedExternalContent = true;
                 }
@@ -2395,7 +2402,8 @@ export function EmailViewer({
 
         return {
           html: cleanHtml,
-          isHtml: true
+          isHtml: true,
+          hasStyleTag: /<style[\s>]/i.test(htmlContent),
         };
       }
 
@@ -2405,7 +2413,8 @@ export function EmailViewer({
 
         return {
           html: plainTextToSafeHtml(textContent),
-          isHtml: false
+          isHtml: false,
+          hasStyleTag: false,
         };
       }
     }
@@ -2419,15 +2428,21 @@ export function EmailViewer({
 
       return {
         html: `<div style="color: var(--color-muted-foreground); font-style: italic;">${previewHtml}</div>`,
-        isHtml: false
+        isHtml: false,
+        hasStyleTag: false,
       };
     }
 
     return {
       html: '<p style="color: var(--color-muted-foreground);">No content available</p>',
-      isHtml: false
+      isHtml: false,
+      hasStyleTag: false,
     };
-  }, [email, allowExternalContent, hasBlockedContent, externalContentPolicy, isSenderTrusted, isTrustedAddressBookSender, trustedSendersAddressBook, cidBlobUrls]);
+    // Intentionally omit allowExternalContent and trust state from deps:
+    // toggling permission imperatively unblocks content via restoreBlockedContent
+    // in an effect below, so the iframe srcDoc stays stable and doesn't reload/flash.
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [email, externalContentPolicy, cidBlobUrls]);
 
   // Override email content with S/MIME decrypted content when available
   const effectiveEmailContent = useMemo(() => {
@@ -2438,27 +2453,27 @@ export function EmailViewer({
           return cidBlobUrls[cidRef] || 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
         }
       );
-      const cleanHtml = DOMPurify.sanitize(htmlWithCidUrls, EMAIL_SANITIZE_CONFIG);
-      return { html: cleanHtml, isHtml: true };
+      const cleanHtml = DOMPurify.sanitize(htmlWithCidUrls, EMAIL_IFRAME_SANITIZE_CONFIG);
+      return { html: cleanHtml, isHtml: true, hasStyleTag: /<style[\s>]/i.test(smimeDecryptedHtml) };
     }
     if (smimeDecryptedText) {
-      return { html: plainTextToSafeHtml(smimeDecryptedText), isHtml: false };
+      return { html: plainTextToSafeHtml(smimeDecryptedText), isHtml: false, hasStyleTag: false };
     }
     // TNEF (winmail.dat) extracted content
     if (tnefHtml) {
-      const cleanHtml = DOMPurify.sanitize(tnefHtml, EMAIL_SANITIZE_CONFIG);
-      return { html: cleanHtml, isHtml: true };
+      const cleanHtml = DOMPurify.sanitize(tnefHtml, EMAIL_IFRAME_SANITIZE_CONFIG);
+      return { html: cleanHtml, isHtml: true, hasStyleTag: /<style[\s>]/i.test(tnefHtml) };
     }
     if (tnefText) {
-      return { html: plainTextToSafeHtml(tnefText), isHtml: false };
+      return { html: plainTextToSafeHtml(tnefText), isHtml: false, hasStyleTag: false };
     }
     // Embedded message/rfc822 unwrapped content
     if (embeddedEmailHtml) {
-      const cleanHtml = DOMPurify.sanitize(embeddedEmailHtml, EMAIL_SANITIZE_CONFIG);
-      return { html: cleanHtml, isHtml: true };
+      const cleanHtml = DOMPurify.sanitize(embeddedEmailHtml, EMAIL_IFRAME_SANITIZE_CONFIG);
+      return { html: cleanHtml, isHtml: true, hasStyleTag: /<style[\s>]/i.test(embeddedEmailHtml) };
     }
     if (embeddedEmailText) {
-      return { html: plainTextToSafeHtml(embeddedEmailText), isHtml: false };
+      return { html: plainTextToSafeHtml(embeddedEmailText), isHtml: false, hasStyleTag: false };
     }
     return emailContent;
   }, [cidBlobUrls, emailContent, smimeDecryptedHtml, smimeDecryptedText, tnefHtml, tnefText, embeddedEmailHtml, embeddedEmailText]);
@@ -2600,10 +2615,14 @@ export function EmailViewer({
 
     const colorScheme = isDark && emailHasNativeDarkMode ? 'light dark' : 'light';
 
+    // Bare HTML emails (no <style>) tend to be plain prose without their own
+    // layout — give them the same padding as plain-text mails (.email-content-text).
+    const bodyPadding = effectiveEmailContent.hasStyleTag ? '0' : '1rem 1.25rem';
+
     return `<!DOCTYPE html>
 <html style="color-scheme: ${colorScheme};"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1">
 <style>
-  body { margin: 0; padding: 16px; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; font-size: 14px; line-height: 1.6; color: #1a1a1a; background: #ffffff; word-wrap: break-word; overflow-wrap: break-word; }
+  body { margin: 0; padding: ${bodyPadding}; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; font-size: 14px; line-height: 1.6; color: #1a1a1a; background: #ffffff; word-wrap: break-word; overflow-wrap: break-word; }
   img { max-width: 100% !important; height: auto !important; }
   a { color: #1a73e8; }
   table { max-width: 100% !important; table-layout: auto; overflow-wrap: break-word; }
@@ -2613,6 +2632,79 @@ export function EmailViewer({
 </style></head><body>${effectiveEmailContent.html}</body></html>`;
   }, [effectiveEmailContent.html, effectiveEmailContent.isHtml, isDark, emailHasNativeDarkMode]);
 
+  // Imperatively restore blocked external content inside the iframe document.
+  // Avoids re-rendering the iframe srcDoc (which would reload and flash) when
+  // the user clicks "Load images" or "Trust sender".
+  const restoreBlockedContent = useCallback(() => {
+    const doc = iframeRef.current?.contentDocument;
+    if (!doc) return;
+
+    doc.querySelectorAll('img[data-blocked-src]').forEach((node) => {
+      const el = node as HTMLImageElement;
+      const src = el.getAttribute('data-blocked-src');
+      if (src) {
+        el.setAttribute('src', src);
+        el.style.display = '';
+        el.removeAttribute('data-blocked-src');
+      }
+    });
+
+    doc.querySelectorAll('[data-blocked-style]').forEach((node) => {
+      const el = node as HTMLElement;
+      const style = el.getAttribute('data-blocked-style');
+      if (style !== null) {
+        el.style.cssText = style;
+        el.removeAttribute('data-blocked-style');
+      }
+    });
+
+    doc.querySelectorAll('[data-blocked-background]').forEach((node) => {
+      const el = node as HTMLElement;
+      const bg = el.getAttribute('data-blocked-background');
+      if (bg) {
+        el.setAttribute('background', bg);
+        el.removeAttribute('data-blocked-background');
+      }
+    });
+
+    doc.querySelectorAll('[data-blocked-collapsed-style]').forEach((node) => {
+      const el = node as HTMLElement;
+      const style = el.getAttribute('data-blocked-collapsed-style');
+      if (style !== null) {
+        el.style.cssText = style;
+        el.removeAttribute('data-blocked-collapsed-style');
+      }
+    });
+  }, []);
+
+  // Whenever permission is granted (allow toggled, or sender becomes trusted),
+  // restore blocked content in the existing iframe — no srcDoc rebuild.
+  const senderEmailLower = email?.from?.[0]?.email?.toLowerCase();
+  const senderIsTrustedNow = senderEmailLower
+    ? isSenderTrusted(senderEmailLower) || (trustedSendersAddressBook && isTrustedAddressBookSender(senderEmailLower))
+    : false;
+  useEffect(() => {
+    if (!hasBlockedContent) return;
+    if (!allowExternalContent && !senderIsTrustedNow) return;
+    restoreBlockedContent();
+  }, [allowExternalContent, senderIsTrustedNow, hasBlockedContent, restoreBlockedContent]);
+
+  // Tracks the last rendered body height so the loading skeleton can hold
+  // the same size — avoids the body shrink/expand flash when switching emails.
+  const lastBodyHeightRef = useRef<number>(300);
+
+  // True while the new email's body is still being fetched. Catches the
+  // window between selectedEmail changing and isLoading flipping true, so the
+  // quick reply / body don't flicker through a partial render.
+  const isBodyLoading = isLoading || !email?.bodyValues || Object.keys(email.bodyValues).length === 0;
+
+  // Gates the quick reply on the iframe having loaded the current srcDoc, so
+  // it doesn't flash in below a still-resizing iframe.
+  const [iframeReady, setIframeReady] = useState(false);
+  useLayoutEffect(() => {
+    setIframeReady(false);
+  }, [emailIframeSrcDoc]);
+
   const handleIframeLoad = useCallback(() => {
     const iframe = iframeRef.current;
     if (!iframe) return;
@@ -2623,9 +2715,13 @@ export function EmailViewer({
         const resizeObserver = new ResizeObserver(() => {
           const height = doc.documentElement.scrollHeight;
           iframe.style.height = height + 'px';
+          lastBodyHeightRef.current = height;
         });
         resizeObserver.observe(doc.body);
-        iframe.style.height = doc.documentElement.scrollHeight + 'px';
+        const initialHeight = doc.documentElement.scrollHeight;
+        iframe.style.height = initialHeight + 'px';
+        lastBodyHeightRef.current = initialHeight;
+        setIframeReady(true);
 
         // Make links open in new tab
         doc.querySelectorAll('a').forEach(a => {
@@ -2880,7 +2976,7 @@ 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) || (isFocusedMailLayout && !isMobile)) && onBack && (
+        {showBackButton && (isMobile || (isTablet && !tabletListVisible) || (isFocusedMailLayout && !isMobile)) && onBack && (
           <Button
             variant="ghost"
             size="icon"
@@ -2946,11 +3042,6 @@ export function EmailViewer({
 
       {/* 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">
-            <Loader2 className="w-4 h-4 animate-spin" />
-          </div>
-        )}
         {/* Archive */}
         <Button
           variant="ghost"
@@ -3436,70 +3527,172 @@ export function EmailViewer({
         moreMenuOpen ? "translate-x-0" : "translate-x-full"
       )}>
         <div className="flex items-center justify-between px-4 py-3 border-b border-border">
-          <span className="text-sm font-semibold text-foreground">{t('more_actions')}</span>
-          <Button variant="ghost" size="icon" onClick={() => setMoreMenuOpen(false)} className="h-9 w-9">
+          {moreMenuSub ? (
+            <button
+              onClick={() => setMoreMenuSub(null)}
+              className="flex items-center gap-1 -ml-2 px-2 py-1 rounded hover:bg-muted text-sm font-semibold text-foreground"
+            >
+              <ChevronLeft className="w-5 h-5" />
+              {moreMenuSub === 'move' ? t('move_to') : t('tag')}
+            </button>
+          ) : (
+            <span className="text-sm font-semibold text-foreground">{t('more_actions')}</span>
+          )}
+          <Button variant="ghost" size="icon" onClick={() => { setMoreMenuOpen(false); setMoreMenuSub(null); }} className="h-9 w-9">
             <X className="w-5 h-5" />
           </Button>
         </div>
         <div className="flex-1 overflow-y-auto py-2">
-          <button
-            onClick={() => { onArchive?.(); setMoreMenuOpen(false); }}
-            className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-          >
-            <Archive className="w-5 h-5" />
-            {t('archive')}
-          </button>
-          {/* Move to folder */}
-          {moveTree.length > 0 && onMoveToMailbox && (
+          {moreMenuSub === null && (
             <>
+              <button
+                onClick={() => { onArchive?.(); setMoreMenuOpen(false); }}
+                className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+              >
+                <Archive className="w-5 h-5" />
+                {t('archive')}
+              </button>
+              {/* Move to folder (opens sub-view) */}
+              {moveTree.length > 0 && onMoveToMailbox && (
+                <button
+                  onClick={() => setMoreMenuSub('move')}
+                  className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+                >
+                  <FolderInput className="w-5 h-5" />
+                  <span className="flex-1">{t('move_to')}</span>
+                  <ChevronRight className="w-4 h-4 text-muted-foreground" />
+                </button>
+              )}
+              {/* Tag (opens sub-view) */}
+              {colorOptions.length > 0 && (
+                <button
+                  onClick={() => setMoreMenuSub('tag')}
+                  className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+                >
+                  <Tag className="w-5 h-5" />
+                  <span className="flex-1">{t('tag')}</span>
+                  {currentColors.length > 0 && (
+                    <div className="flex -space-x-1 mr-1">
+                      {currentColors.slice(0, 3).map((c) => {
+                        const opt = colorOptions.find((o) => o.value === c);
+                        return opt ? <span key={c} className={cn("w-3 h-3 rounded-full border border-background", opt.color)} /> : null;
+                      })}
+                    </div>
+                  )}
+                  <ChevronRight className="w-4 h-4 text-muted-foreground" />
+                </button>
+              )}
+              {/* Spam */}
+              {(onMarkAsSpam || onUndoSpam) && (
+                <button
+                  onClick={() => { (isInJunkFolder ? onUndoSpam : onMarkAsSpam)?.(); setMoreMenuOpen(false); }}
+                  className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+                >
+                  {isInJunkFolder ? (
+                    <ShieldCheck className="h-5 w-5 text-green-600 dark:text-green-400" />
+                  ) : (
+                    <ShieldAlert className="h-5 w-5 text-red-600 dark:text-red-400" />
+                  )}
+                  {isInJunkFolder ? t('spam.not_spam_title') : t('spam.button_title')}
+                </button>
+              )}
+              {/* Toggle read state */}
+              <button
+                onClick={() => { onMarkAsRead?.(email.id, isUnread); setMoreMenuOpen(false); }}
+                className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+              >
+                {isUnread ? <MailOpen className="w-5 h-5" /> : <Mail className="w-5 h-5" />}
+                {isUnread ? t('mark_read') : t('mark_unread')}
+              </button>
+              <button
+                onClick={() => { handlePrint(); setMoreMenuOpen(false); }}
+                className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+              >
+                <Printer className="w-5 h-5" />
+                {t('print')}
+              </button>
+              <button
+                onClick={() => { setShowSourceModal(true); setMoreMenuOpen(false); }}
+                className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+              >
+                <Code className="w-5 h-5" />
+                {t('view_source')}
+              </button>
+              {effectiveEmailContent.isHtml && (
+                <button
+                  onClick={() => { setEmailViewDarkOverride(prev => prev === null ? !(resolvedTheme === 'dark') : !prev); setMoreMenuOpen(false); }}
+                  className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+                >
+                  {isDark ? <Sun className="w-5 h-5" /> : <Moon className="w-5 h-5" />}
+                  {isDark ? 'View in light mode' : 'View in dark mode'}
+                </button>
+              )}
               <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('move_to')}</div>
-              {(() => {
-                const renderMobileNodes = (nodes: MailboxNode[], depth = 0) => {
-                  return nodes.map((node) => {
-                    const Icon = getMoveMailboxIcon(node.role);
-                    const isTarget = moveTargetIds.has(node.id);
-                    return (
-                      <div key={node.id}>
-                        {isTarget ? (
-                          <button
-                            onClick={() => { onMoveToMailbox(node.id); 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"
-                            style={{ paddingLeft: `${1 + depth * 1}rem` }}
-                          >
-                            <Icon className="w-5 h-5 flex-shrink-0" />
-                            <span className="truncate">{node.name}</span>
-                          </button>
-                        ) : (
-                          <div
-                            className="px-4 py-2.5 min-h-[44px] text-sm flex items-center gap-3 text-muted-foreground"
-                            style={{ paddingLeft: `${1 + depth * 1}rem` }}
-                          >
-                            <Icon className="w-5 h-5 flex-shrink-0" />
-                            <span>{node.name}</span>
-                          </div>
-                        )}
-                        {node.children.length > 0 && renderMobileNodes(node.children, depth + 1)}
-                      </div>
-                    );
-                  });
-                };
-                return renderMobileNodes(moveTree);
-              })()}
-              <div className="h-px bg-border my-1" />
+              <button
+                onClick={() => { handleExportEmail(); setMoreMenuOpen(false); }}
+                className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+              >
+                <Download className="w-5 h-5" />
+                {t('export_email')}
+              </button>
+              <button
+                onClick={() => { handleImportEmail(); setMoreMenuOpen(false); }}
+                className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+              >
+                <Upload className="w-5 h-5" />
+                {t('import_email')}
+              </button>
+              {onShowShortcuts && (
+                <button
+                  onClick={() => { onShowShortcuts(); setMoreMenuOpen(false); }}
+                  className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
+                >
+                  <Keyboard className="w-5 h-5" />
+                  {t('keyboard_shortcuts')}
+                </button>
+              )}
             </>
           )}
-          {/* Tags */}
-          {colorOptions.length > 0 && (
+          {moreMenuSub === 'move' && moveTree.length > 0 && onMoveToMailbox && (() => {
+            const renderMobileNodes = (nodes: MailboxNode[], depth = 0) => {
+              return nodes.map((node) => {
+                const Icon = getMoveMailboxIcon(node.role);
+                const isTarget = moveTargetIds.has(node.id);
+                return (
+                  <div key={node.id}>
+                    {isTarget ? (
+                      <button
+                        onClick={() => { onMoveToMailbox(node.id); setMoreMenuOpen(false); setMoreMenuSub(null); }}
+                        className="w-full px-4 py-2.5 min-h-[44px] text-sm text-left hover:bg-muted flex items-center gap-3"
+                        style={{ paddingLeft: `${1 + depth * 1}rem` }}
+                      >
+                        <Icon className="w-5 h-5 flex-shrink-0" />
+                        <span className="truncate">{node.name}</span>
+                      </button>
+                    ) : (
+                      <div
+                        className="px-4 py-2.5 min-h-[44px] text-sm flex items-center gap-3 text-muted-foreground"
+                        style={{ paddingLeft: `${1 + depth * 1}rem` }}
+                      >
+                        <Icon className="w-5 h-5 flex-shrink-0" />
+                        <span>{node.name}</span>
+                      </div>
+                    )}
+                    {node.children.length > 0 && renderMobileNodes(node.children, depth + 1)}
+                  </div>
+                );
+              });
+            };
+            return renderMobileNodes(moveTree);
+          })()}
+          {moreMenuSub === 'tag' && colorOptions.length > 0 && (
             <>
-              <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) => {
                 const isActive = currentColors.includes(option.value);
                 return (
                   <button
                     key={option.value}
-                    onClick={() => { if (email) onSetColorTag?.(email.id, option.value); setMoreMenuOpen(false); }}
+                    onClick={() => { if (email) onSetColorTag?.(email.id, option.value); setMoreMenuOpen(false); setMoreMenuSub(null); }}
                     className={cn(
                       "w-full px-4 py-2.5 min-h-[44px] text-sm text-left hover:bg-muted flex items-center gap-3",
                       isActive && "bg-accent font-medium"
@@ -3513,99 +3706,20 @@ export function EmailViewer({
               })}
               {currentColors.length > 0 && (
                 <button
-                  onClick={() => { if (email) onSetColorTag?.(email.id, null); setMoreMenuOpen(false); }}
+                  onClick={() => { if (email) onSetColorTag?.(email.id, null); setMoreMenuOpen(false); setMoreMenuSub(null); }}
                   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"
                 >
                   <X className="w-4 h-4 flex-shrink-0" />
                   <span>{t('remove_color')}</span>
                 </button>
               )}
-              <div className="h-px bg-border my-1" />
             </>
           )}
-          {/* Spam */}
-          {(onMarkAsSpam || onUndoSpam) && (
-            <button
-              onClick={() => { (isInJunkFolder ? onUndoSpam : onMarkAsSpam)?.(); setMoreMenuOpen(false); }}
-              className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-            >
-              {isInJunkFolder ? (
-                <ShieldCheck className="h-5 w-5 text-green-600 dark:text-green-400" />
-              ) : (
-                <ShieldAlert className="h-5 w-5 text-red-600 dark:text-red-400" />
-              )}
-              {isInJunkFolder ? t('spam.not_spam_title') : t('spam.button_title')}
-            </button>
-          )}
-          {/* Toggle read state */}
-          <button
-            onClick={() => { onMarkAsRead?.(email.id, isUnread); setMoreMenuOpen(false); }}
-            className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-          >
-            {isUnread ? <MailOpen className="w-5 h-5" /> : <Mail className="w-5 h-5" />}
-            {isUnread ? t('mark_read') : t('mark_unread')}
-          </button>
-          <button
-            onClick={() => { handlePrint(); setMoreMenuOpen(false); }}
-            className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-          >
-            <Printer className="w-5 h-5" />
-            {t('print')}
-          </button>
-          <button
-            onClick={() => { setShowSourceModal(true); setMoreMenuOpen(false); }}
-            className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-          >
-            <Code className="w-5 h-5" />
-            {t('view_source')}
-          </button>
-          {effectiveEmailContent.isHtml && (
-            <button
-              onClick={() => { setEmailViewDarkOverride(prev => prev === null ? !(resolvedTheme === 'dark') : !prev); setMoreMenuOpen(false); }}
-              className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-            >
-              {isDark ? <Sun className="w-5 h-5" /> : <Moon className="w-5 h-5" />}
-              {isDark ? 'View in light mode' : 'View in dark mode'}
-            </button>
-          )}
-          <div className="h-px bg-border my-1" />
-          <button
-            onClick={() => { handleExportEmail(); setMoreMenuOpen(false); }}
-            className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-          >
-            <Download className="w-5 h-5" />
-            {t('export_email')}
-          </button>
-          <button
-            onClick={() => { handleImportEmail(); setMoreMenuOpen(false); }}
-            className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-          >
-            <Upload className="w-5 h-5" />
-            {t('import_email')}
-          </button>
-          {onShowShortcuts && (
-            <button
-              onClick={() => { onShowShortcuts(); setMoreMenuOpen(false); }}
-              className="w-full px-4 py-3 min-h-[44px] text-sm text-left hover:bg-muted text-foreground flex items-center gap-3"
-            >
-              <Keyboard className="w-5 h-5" />
-              {t('keyboard_shortcuts')}
-            </button>
-          )}
         </div>
       </div>
     )}
     {/* Main email content */}
     <div className="flex-1 flex flex-col h-full overflow-hidden min-w-0">
-      {/* Loading overlay when fetching new email */}
-      {isLoading && (
-        <div className="absolute inset-0 bg-background/60 backdrop-blur-[2px] z-50 flex items-center justify-center animate-in fade-in duration-200">
-          <div className="bg-background rounded-lg shadow-lg border border-border p-4 flex items-center gap-3">
-            <Loader2 className="w-5 h-5 animate-spin text-primary" />
-            <span className="text-sm font-medium text-foreground">{t('loading_email')}</span>
-          </div>
-        </div>
-      )}
       {/* === TOOLBAR (top position) === */}
       {toolbarPosition === 'top' && (
         <div className={cn(
@@ -3628,7 +3742,7 @@ 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) || (isFocusedMailLayout && !isMobile)) && onBack && (
+            {toolbarPosition === 'below-subject' && (isMobile || (isTablet && !tabletListVisible) || (isFocusedMailLayout && !isMobile)) && onBack && (
               <Button
                 variant="ghost"
                 size="icon"
@@ -3676,8 +3790,8 @@ export function EmailViewer({
                 )}
               </div>
             </div>
-            {/* Date/time on the right of subject row */}
-            <div className="flex-shrink-0 text-right">
+            {/* Date/time on the right of subject row - hidden on mobile, shown next to sender */}
+            <div className="hidden sm:block flex-shrink-0 text-right">
               <span className="text-xs lg:text-sm text-muted-foreground whitespace-nowrap">
                 {formatDateTime(email.receivedAt, timeFormat, { weekday: 'short', year: 'numeric', month: 'short', day: 'numeric' })}
               </span>
@@ -4484,6 +4598,17 @@ export function EmailViewer({
                 )}
               </div>
             </div>
+            {/* Date/time + size on the right (mobile) */}
+            <div className="sm:hidden flex-shrink-0 text-right ml-2">
+              <span className="text-xs text-muted-foreground whitespace-nowrap">
+                {formatDateTime(email.receivedAt, timeFormat, { weekday: 'short', year: 'numeric', month: 'short', day: 'numeric' })}
+              </span>
+              {email.size > 0 && (
+                <div className="text-xs text-muted-foreground/60">
+                  {formatFileSize(email.size)}
+                </div>
+              )}
+            </div>
           </div>
         </div>
 
@@ -4591,14 +4716,28 @@ export function EmailViewer({
           <PluginSlot name="email-banner" extraProps={{ email }} />
 
           {/* Email Body */}
-          <div className="email-content-wrapper overflow-x-auto">
-            {effectiveEmailContent.isHtml ? (
+          <div className={cn(
+            "email-content-wrapper overflow-x-auto",
+            emailAlwaysLightMode ? "bg-white email-content-light" : "bg-background"
+          )}>
+            {isBodyLoading ? (
+              <div
+                className="space-y-3 px-6 py-4 animate-pulse"
+                style={{ minHeight: `${lastBodyHeightRef.current}px` }}
+              >
+                <div className="h-2 bg-muted/15 rounded w-full"></div>
+                <div className="h-2 bg-muted/15 rounded w-5/6"></div>
+                <div className="h-2 bg-muted/15 rounded w-4/6"></div>
+                <div className="h-2 bg-muted/15 rounded w-full"></div>
+                <div className="h-2 bg-muted/15 rounded w-3/4"></div>
+              </div>
+            ) : effectiveEmailContent.isHtml ? (
               <iframe
                 ref={iframeRef}
                 srcDoc={emailIframeSrcDoc}
                 sandbox="allow-same-origin allow-popups allow-popups-to-escape-sandbox"
                 title="Email content"
-                className="w-full border-0 rounded"
+                className="w-full border-0"
                 style={{ minHeight: '100px', colorScheme: isDark && emailHasNativeDarkMode ? 'light dark' : 'light' }}
                 onLoad={handleIframeLoad}
               />
@@ -4619,8 +4758,8 @@ export function EmailViewer({
 
           <PluginSlot name="email-footer" />
 
-          {/* Quick Reply Section - hidden for drafts */}
-          {!isDraft && (<div className={cn(
+          {/* Quick Reply Section - hidden for drafts and while loading a new email */}
+          {!isDraft && !isBodyLoading && (effectiveEmailContent.isHtml ? iframeReady : true) && (<div className={cn(
             "mt-6 mx-6 mb-6 bg-background rounded-lg shadow-sm border transition-all",
             isQuickReplyFocused || quickReplyText ? "border-primary" : "border-border"
           )}>

components/email/rich-text-editor.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import React, { useEffect, useCallback } from "react";
+import React, { useEffect, useCallback, useState, useRef } from "react";
 import { useEditor, EditorContent } from "@tiptap/react";
 import StarterKit from "@tiptap/starter-kit";
 import Underline from "@tiptap/extension-underline";
@@ -10,6 +10,10 @@ import { TextStyle } from "@tiptap/extension-text-style";
 import Color from "@tiptap/extension-color";
 import { ResizableImage } from "@/components/email/resizable-image";
 import Placeholder from "@tiptap/extension-placeholder";
+import { Table } from "@tiptap/extension-table";
+import { TableRow } from "@tiptap/extension-table-row";
+import { TableHeader } from "@tiptap/extension-table-header";
+import { TableCell } from "@tiptap/extension-table-cell";
 import { cn } from "@/lib/utils";
 import {
   Bold,
@@ -29,6 +33,10 @@ import {
   RemoveFormatting,
   Heading1,
   Heading2,
+  Table as TableIcon,
+  Trash2,
+  Rows3,
+  Columns3,
 } from "lucide-react";
 
 export interface InlineImageUpload {
@@ -79,6 +87,43 @@ function ToolbarSeparator() {
   return <div className="w-px h-5 bg-border mx-0.5" />;
 }
 
+const TABLE_PICKER_ROWS = 6;
+const TABLE_PICKER_COLS = 8;
+
+function TableSizePicker({ onPick }: { onPick: (rows: number, cols: number) => void }) {
+  const [hover, setHover] = useState<{ r: number; c: number } | null>(null);
+  return (
+    <div>
+      <div
+        className="grid gap-0.5"
+        style={{ gridTemplateColumns: `repeat(${TABLE_PICKER_COLS}, 1fr)` }}
+        onMouseLeave={() => setHover(null)}
+      >
+        {Array.from({ length: TABLE_PICKER_ROWS * TABLE_PICKER_COLS }).map((_, i) => {
+          const r = Math.floor(i / TABLE_PICKER_COLS);
+          const c = i % TABLE_PICKER_COLS;
+          const active = hover && r <= hover.r && c <= hover.c;
+          return (
+            <button
+              key={i}
+              type="button"
+              onMouseEnter={() => setHover({ r, c })}
+              onClick={() => onPick(r + 1, c + 1)}
+              className={cn(
+                "w-4 h-4 border border-border/60 rounded-[2px] transition-colors",
+                active ? "bg-primary border-primary" : "bg-background hover:bg-accent"
+              )}
+            />
+          );
+        })}
+      </div>
+      <div className="text-xs text-muted-foreground mt-1.5 text-center">
+        {hover ? `${hover.r + 1} × ${hover.c + 1}` : "Pick size"}
+      </div>
+    </div>
+  );
+}
+
 export function RichTextEditor({
   content,
   onChange,
@@ -109,6 +154,27 @@ export function RichTextEditor({
       Placeholder.configure({
         placeholder,
       }),
+      Table.configure({
+        resizable: true,
+        HTMLAttributes: {
+          border: "1",
+          cellpadding: "6",
+          cellspacing: "0",
+          width: "100%",
+          style: "width:100%;border-collapse:collapse;",
+        },
+      }),
+      TableRow,
+      TableHeader.configure({
+        HTMLAttributes: {
+          style: "padding:6px 8px;border:1px solid #ccc;background-color:#f5f5f5;color:#1f2937;text-align:left;",
+        },
+      }),
+      TableCell.configure({
+        HTMLAttributes: {
+          style: "padding:6px 8px;border:1px solid #ccc;vertical-align:top;",
+        },
+      }),
     ],
     content,
     editorProps: {
@@ -188,6 +254,20 @@ export function RichTextEditor({
       .run();
   }, [editor]);
 
+  const [tableMenuOpen, setTableMenuOpen] = useState(false);
+  const tableWrapperRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    if (!tableMenuOpen) return;
+    const handler = (e: MouseEvent) => {
+      if (tableWrapperRef.current && !tableWrapperRef.current.contains(e.target as Node)) {
+        setTableMenuOpen(false);
+      }
+    };
+    document.addEventListener("mousedown", handler);
+    return () => document.removeEventListener("mousedown", handler);
+  }, [tableMenuOpen]);
+
   if (!editor) {
     return (
       <div className={cn("min-h-[100px]", className)} />
@@ -309,6 +389,89 @@ export function RichTextEditor({
           <LinkIcon className="w-4 h-4" />
         </ToolbarButton>
 
+        <div ref={tableWrapperRef} className="relative">
+          <ToolbarButton
+            active={editor.isActive("table")}
+            onClick={() => setTableMenuOpen((v) => !v)}
+            title="Table"
+          >
+            <TableIcon className="w-4 h-4" />
+          </ToolbarButton>
+          {tableMenuOpen && (
+            <div className="absolute z-50 top-full left-0 mt-1 bg-popover border border-border rounded-md shadow-md p-2 min-w-[200px]">
+              {editor.isActive("table") ? (
+                <div className="flex flex-col gap-0.5">
+                  <button
+                    type="button"
+                    className="flex items-center gap-2 px-2 py-1.5 text-sm rounded hover:bg-accent text-left"
+                    onClick={() => { editor.chain().focus().addRowBefore().run(); setTableMenuOpen(false); }}
+                  >
+                    <Rows3 className="w-4 h-4" /> Add row above
+                  </button>
+                  <button
+                    type="button"
+                    className="flex items-center gap-2 px-2 py-1.5 text-sm rounded hover:bg-accent text-left"
+                    onClick={() => { editor.chain().focus().addRowAfter().run(); setTableMenuOpen(false); }}
+                  >
+                    <Rows3 className="w-4 h-4" /> Add row below
+                  </button>
+                  <button
+                    type="button"
+                    className="flex items-center gap-2 px-2 py-1.5 text-sm rounded hover:bg-accent text-left"
+                    onClick={() => { editor.chain().focus().addColumnBefore().run(); setTableMenuOpen(false); }}
+                  >
+                    <Columns3 className="w-4 h-4" /> Add column before
+                  </button>
+                  <button
+                    type="button"
+                    className="flex items-center gap-2 px-2 py-1.5 text-sm rounded hover:bg-accent text-left"
+                    onClick={() => { editor.chain().focus().addColumnAfter().run(); setTableMenuOpen(false); }}
+                  >
+                    <Columns3 className="w-4 h-4" /> Add column after
+                  </button>
+                  <div className="h-px bg-border my-1" />
+                  <button
+                    type="button"
+                    className="flex items-center gap-2 px-2 py-1.5 text-sm rounded hover:bg-accent text-left"
+                    onClick={() => { editor.chain().focus().deleteRow().run(); setTableMenuOpen(false); }}
+                  >
+                    <Trash2 className="w-4 h-4" /> Delete row
+                  </button>
+                  <button
+                    type="button"
+                    className="flex items-center gap-2 px-2 py-1.5 text-sm rounded hover:bg-accent text-left"
+                    onClick={() => { editor.chain().focus().deleteColumn().run(); setTableMenuOpen(false); }}
+                  >
+                    <Trash2 className="w-4 h-4" /> Delete column
+                  </button>
+                  <button
+                    type="button"
+                    className="flex items-center gap-2 px-2 py-1.5 text-sm rounded hover:bg-accent text-left"
+                    onClick={() => { editor.chain().focus().toggleHeaderRow().run(); setTableMenuOpen(false); }}
+                  >
+                    <Rows3 className="w-4 h-4" /> Toggle header row
+                  </button>
+                  <div className="h-px bg-border my-1" />
+                  <button
+                    type="button"
+                    className="flex items-center gap-2 px-2 py-1.5 text-sm rounded hover:bg-accent text-left text-red-600 dark:text-red-400"
+                    onClick={() => { editor.chain().focus().deleteTable().run(); setTableMenuOpen(false); }}
+                  >
+                    <Trash2 className="w-4 h-4" /> Delete table
+                  </button>
+                </div>
+              ) : (
+                <TableSizePicker
+                  onPick={(rows, cols) => {
+                    editor.chain().focus().insertTable({ rows, cols, withHeaderRow: true }).run();
+                    setTableMenuOpen(false);
+                  }}
+                />
+              )}
+            </div>
+          )}
+        </div>
+
         <ToolbarSeparator />
 
         <ToolbarButton

components/email/thread-list-item.tsx

@@ -64,6 +64,8 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
     const emailKeywords = useSettingsStore((state) => state.emailKeywords);
     const density = useSettingsStore((state) => state.density);
     const mailLayout = useSettingsStore((state) => state.mailLayout);
+    const showAvatarsInJunk = useSettingsStore((state) => state.showAvatarsInJunk);
+    const hideJunkAvatarImages = currentMailboxRole === 'junk' && !showAvatarsInJunk;
     const isUnifiedView = useEmailStore((state) => state.isUnifiedView);
     const getAccountById = useAccountStore((state) => state.getAccountById);
     const accountColor = email.accountId ? getAccountById(email.accountId)?.avatarColor : undefined;
@@ -133,7 +135,8 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
               : "bg-background"
           ),
           selected && !resolvedColorTag && "shadow-sm",
-          !resolvedColorTag && !selected && "hover:bg-muted hover:shadow-sm",
+          !resolvedColorTag && !selected && !isChecked && "hover:bg-muted hover:shadow-sm",
+          !resolvedColorTag && (selected || isChecked) && "hover:bg-accent hover:shadow-sm",
           resolvedColorTag && "hover:brightness-95 dark:hover:brightness-110",
           isUnread && !resolvedColorTag && "bg-accent/30",
           isChecked && "ring-2 ring-primary/20 bg-accent/40",
@@ -181,6 +184,7 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
               email={sender?.email}
               size="md"
               className="flex-shrink-0 shadow-sm"
+              disableImages={hideJunkAvatarImages}
             />
           )}
 
@@ -305,7 +309,7 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
                   {email.subject || "(no subject)"}
                 </div>
 
-                {showPreview && density !== 'extra-compact' && (
+                {showPreview && density !== 'extra-compact' && density !== 'compact' && (
                   <p className={cn(
                     "text-sm leading-relaxed line-clamp-2",
                     isUnread
@@ -323,7 +327,7 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
         {/* Hover Quick Actions */}
         <EmailHoverActions
           email={email}
-          backgroundClassName={resolvedColorTag ? resolvedColorTag : (selected ? "bg-accent" : "bg-muted")}
+          backgroundClassName={resolvedColorTag ? resolvedColorTag : ((selected || isChecked) ? "bg-accent" : "bg-muted")}
           onToggleStar={onToggleStar}
           onMarkAsRead={onMarkAsRead}
           onDelete={onDelete}
@@ -358,6 +362,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
     const showPreview = useSettingsStore((state) => state.showPreview);
     const density = useSettingsStore((state) => state.density);
     const mailLayout = useSettingsStore((state) => state.mailLayout);
+    const showAvatarsInJunk = useSettingsStore((state) => state.showAvatarsInJunk);
     const isMobile = useUIStore((state) => state.isMobile);
     const { latestEmail, participantNames, hasUnread, hasStarred, hasAttachment, hasAnswered, hasForwarded, emailCount } = thread;
     const isFocusedMailLayout = mailLayout === 'focus';
@@ -375,6 +380,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
         )).slice(0, 4)
       : participantNames;
     const avatarPerson = showRecipient ? latestEmail.to?.[0] : latestEmail.from?.[0];
+    const hideJunkAvatarImages = currentMailboxRole === 'junk' && !showAvatarsInJunk;
 
     const { dragHandlers, isDragging: isThreadDragging } = useEmailDrag({
       email: latestEmail,
@@ -487,7 +493,8 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
                 : "bg-background"
             ),
             isSelected && !colorTag && "shadow-sm",
-            !colorTag && !isSelected && "hover:bg-muted hover:shadow-sm",
+            !colorTag && !isSelected && !isChecked && "hover:bg-muted hover:shadow-sm",
+            !colorTag && (isSelected || isChecked) && "hover:bg-accent hover:shadow-sm",
             colorTag && "hover:brightness-95 dark:hover:brightness-110",
             hasUnread && !colorTag && !isSelected && "bg-accent/30",
             isExpanded && "border-b border-border/50",
@@ -561,6 +568,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
                 email={avatarPerson?.email}
                 size="md"
                 className="flex-shrink-0 shadow-sm"
+                disableImages={hideJunkAvatarImages}
               />
             )}
 
@@ -707,7 +715,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
                     {latestEmail.subject || "(no subject)"}
                   </div>
 
-                  {showPreview && density !== 'extra-compact' && (
+                  {showPreview && density !== 'extra-compact' && density !== 'compact' && (
                     <p className={cn(
                       "text-sm leading-relaxed line-clamp-2",
                       hasUnread
@@ -725,7 +733,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
           {/* Hover Quick Actions for thread header */}
           <EmailHoverActions
             email={latestEmail}
-            backgroundClassName={colorTag ? colorTag : (isSelected ? "bg-accent" : "bg-muted")}
+            backgroundClassName={colorTag ? colorTag : ((isSelected || isChecked) ? "bg-accent" : "bg-muted")}
             onToggleStar={onToggleStar ? () => onToggleStar(latestEmail) : undefined}
             onMarkAsRead={onMarkAsRead ? (read) => onMarkAsRead(latestEmail, read) : undefined}
             onDelete={onDelete ? () => onDelete(latestEmail) : undefined}

components/identity/sub-address-helper.tsx

@@ -7,6 +7,7 @@ import { cn } from '@/lib/utils';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { useIdentityStore } from '@/stores/identity-store';
+import { useSettingsStore } from '@/stores/settings-store';
 import {
   generateSubAddress,
   extractDomain,
@@ -35,6 +36,7 @@ export function SubAddressHelper({
   const popoverRef = useRef<HTMLDivElement>(null);
 
   const { subAddress, addRecentTag, addTagSuggestion } = useIdentityStore();
+  const subAddressDelimiter = useSettingsStore((state) => state.subAddressDelimiter);
 
   // Get suggestions based on recipient (memoized for performance)
   const suggestions = useMemo(() => {
@@ -47,7 +49,7 @@ export function SubAddressHelper({
   }, [recipientEmails]);
 
   // Generate preview
-  const preview = tag ? generateSubAddress(baseEmail, tag) : baseEmail;
+  const preview = tag ? generateSubAddress(baseEmail, tag, subAddressDelimiter) : baseEmail;
 
   // Close popover when clicking outside
   useEffect(() => {
@@ -226,7 +228,7 @@ export function SubAddressHelper({
 
           {/* Help Text */}
           <div className="mb-3 text-xs text-muted-foreground">
-            {t('help_text')}
+            {t('help_text', { delimiter: subAddressDelimiter })}
           </div>
 
           {/* Use Address Button */}

components/layout/mailbox-context-menu.tsx

@@ -0,0 +1,171 @@
+"use client";
+
+import { useTranslations } from "next-intl";
+import { Mailbox } from "@/lib/jmap/types";
+import {
+  ContextMenu,
+  ContextMenuItem,
+  ContextMenuSeparator,
+  ContextMenuHeader,
+} from "@/components/ui/context-menu";
+import {
+  CheckCheck,
+  MailOpen,
+  Mails,
+  Trash2,
+  FolderPlus,
+  Pencil,
+  FolderX,
+  RefreshCw,
+} from "lucide-react";
+
+interface Position {
+  x: number;
+  y: number;
+}
+
+export type MailboxContextTarget =
+  | { kind: "mailbox"; mailbox: Mailbox; hasChildren: boolean }
+  | { kind: "folders-section" };
+
+interface MailboxContextMenuProps {
+  target: MailboxContextTarget | null;
+  position: Position;
+  isOpen: boolean;
+  onClose: () => void;
+  menuRef: React.RefObject<HTMLDivElement | null>;
+  onMarkFolderRead?: (mailboxId: string) => void;
+  onMarkFolderTreeRead?: (mailboxId: string) => void;
+  onMarkAllFoldersRead?: () => void;
+  onEmptyFolder?: (mailboxId: string) => void;
+  onCreateSubfolder?: (parentId: string) => void;
+  onCreateFolder?: () => void;
+  onRenameFolder?: (mailboxId: string) => void;
+  onDeleteFolder?: (mailboxId: string) => void;
+  onRefresh?: () => void;
+}
+
+export function MailboxContextMenu({
+  target,
+  position,
+  isOpen,
+  onClose,
+  menuRef,
+  onMarkFolderRead,
+  onMarkFolderTreeRead,
+  onMarkAllFoldersRead,
+  onEmptyFolder,
+  onCreateSubfolder,
+  onCreateFolder,
+  onRenameFolder,
+  onDeleteFolder,
+  onRefresh,
+}: MailboxContextMenuProps) {
+  const t = useTranslations("mailbox_context_menu");
+
+  const handleAction = (action: () => void) => {
+    action();
+    onClose();
+  };
+
+  if (!target) return null;
+
+  if (target.kind === "folders-section") {
+    return (
+      <ContextMenu ref={menuRef} isOpen={isOpen} position={position} onClose={onClose}>
+        <ContextMenuItem
+          icon={CheckCheck}
+          label={t("mark_all_folders_read")}
+          onClick={() => handleAction(onMarkAllFoldersRead!)}
+          disabled={!onMarkAllFoldersRead}
+        />
+        <ContextMenuSeparator />
+        <ContextMenuItem
+          icon={FolderPlus}
+          label={t("new_folder")}
+          onClick={() => handleAction(onCreateFolder!)}
+          disabled={!onCreateFolder}
+        />
+        <ContextMenuItem
+          icon={RefreshCw}
+          label={t("refresh")}
+          onClick={() => handleAction(onRefresh!)}
+          disabled={!onRefresh}
+        />
+      </ContextMenu>
+    );
+  }
+
+  const mailbox = target.mailbox;
+  const isTrashOrJunk = mailbox.role === "trash" || mailbox.role === "junk";
+  const isSystem =
+    !!mailbox.role &&
+    ["inbox", "sent", "drafts", "trash", "junk", "archive"].includes(mailbox.role);
+  const canRename = mailbox.myRights?.mayRename !== false && !isSystem;
+  const canDelete = mailbox.myRights?.mayDelete !== false && !isSystem;
+  const canCreateChild = mailbox.myRights?.mayCreateChild !== false;
+  const canSetSeen = mailbox.myRights?.maySetSeen !== false;
+  const canRemoveItems = mailbox.myRights?.mayRemoveItems !== false;
+
+  return (
+    <ContextMenu ref={menuRef} isOpen={isOpen} position={position} onClose={onClose}>
+      <ContextMenuHeader>{mailbox.name}</ContextMenuHeader>
+
+      <ContextMenuItem
+        icon={MailOpen}
+        label={t("mark_folder_read")}
+        onClick={() => handleAction(() => onMarkFolderRead?.(mailbox.id))}
+        disabled={!onMarkFolderRead || !canSetSeen}
+      />
+      {target.hasChildren && (
+        <ContextMenuItem
+          icon={Mails}
+          label={t("mark_folder_tree_read")}
+          onClick={() => handleAction(() => onMarkFolderTreeRead?.(mailbox.id))}
+          disabled={!onMarkFolderTreeRead || !canSetSeen}
+        />
+      )}
+
+      <ContextMenuSeparator />
+
+      <ContextMenuItem
+        icon={FolderPlus}
+        label={t("new_subfolder")}
+        onClick={() => handleAction(() => onCreateSubfolder?.(mailbox.id))}
+        disabled={!onCreateSubfolder || !canCreateChild}
+      />
+      <ContextMenuItem
+        icon={Pencil}
+        label={t("rename")}
+        onClick={() => handleAction(() => onRenameFolder?.(mailbox.id))}
+        disabled={!onRenameFolder || !canRename}
+      />
+
+      <ContextMenuSeparator />
+
+      <ContextMenuItem
+        icon={FolderX}
+        label={isTrashOrJunk ? t("empty_folder") : t("empty_folder_generic")}
+        onClick={() => handleAction(() => onEmptyFolder?.(mailbox.id))}
+        disabled={!onEmptyFolder || mailbox.totalEmails === 0 || !canRemoveItems}
+        destructive
+      />
+      <ContextMenuItem
+        icon={Trash2}
+        label={t("delete_folder")}
+        onClick={() => handleAction(() => onDeleteFolder?.(mailbox.id))}
+        disabled={!onDeleteFolder || !canDelete}
+        destructive
+      />
+
+      <ContextMenuSeparator />
+
+      <ContextMenuItem
+        icon={RefreshCw}
+        label={t("refresh")}
+        onClick={() => handleAction(onRefresh!)}
+        disabled={!onRefresh}
+      />
+    </ContextMenu>
+  );
+}

components/layout/navigation-rail.tsx

@@ -8,7 +8,6 @@ import { icons as lucideIcons, type LucideIcon } from "lucide-react";
 import { useConfig } from "@/hooks/use-config";
 import { useThemeStore } from "@/stores/theme-store";
 import { usePathname, Link, useRouter } from "@/i18n/navigation";
-import NextLink from "next/link";
 import { useTranslations } from "next-intl";
 import { useCalendarStore } from "@/stores/calendar-store";
 import { useEmailStore } from "@/stores/email-store";
@@ -336,9 +335,9 @@ export function NavigationRail({
           );
         })}
 
-        {/* Admin (Stalwart admins) */}
+        {/* Admin (Stalwart admins) - hard nav because /admin lives outside the [locale] tree */}
         {isStalwartAdmin && (
-          <NextLink
+          <a
             href="/admin"
             className={cn(
               "flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px]",
@@ -348,7 +347,7 @@ export function NavigationRail({
           >
             <Shield className="w-5 h-5" />
             <span className="text-[10px] font-medium leading-tight truncate max-w-full">{t("admin") || "Admin"}</span>
-          </NextLink>
+          </a>
         )}
 
         {/* Settings */}
@@ -514,13 +513,13 @@ export function NavigationRail({
       {/* Footer: Admin + Settings + Help + Storage Quota + Sign Out + Push Status */}
       <div className="mt-auto flex flex-col items-center gap-2 pb-3 px-1">
         {isStalwartAdmin && (
-          <NextLink
+          <a
             href="/admin"
             className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
             title={t("admin") || "Admin"}
           >
             <Shield className="w-[18px] h-[18px]" />
-          </NextLink>
+          </a>
         )}
 
         <Link

components/layout/sidebar.tsx

@@ -31,6 +31,8 @@ import {
 } from "lucide-react";
 import { cn, buildMailboxTree, MailboxNode } from "@/lib/utils";
 import { Mailbox } from "@/lib/jmap/types";
+import { useContextMenu } from "@/hooks/use-context-menu";
+import { MailboxContextMenu, type MailboxContextTarget } from "./mailbox-context-menu";
 import { useAccountStore } from '@/stores/account-store';
 import { UNIFIED_MAILBOX_IDS } from '@/lib/jmap/types';
 import type { UnifiedMailboxRole } from '@/lib/jmap/types';
@@ -56,6 +58,15 @@ interface SidebarProps {
   onCompose?: () => void;
   onSidebarClose?: () => void;
   onUnreadFilterClick?: (mailboxId: string) => void;
+  onMarkFolderRead?: (mailboxId: string) => void;
+  onMarkFolderTreeRead?: (mailboxId: string) => void;
+  onMarkAllFoldersRead?: () => void;
+  onEmptyFolder?: (mailboxId: string) => void;
+  onCreateSubfolder?: (parentId: string) => void;
+  onCreateFolder?: () => void;
+  onRenameFolder?: (mailboxId: string) => void;
+  onDeleteFolder?: (mailboxId: string) => void;
+  onRefreshMailboxes?: () => void;
   className?: string;
 }
 
@@ -187,6 +198,7 @@ interface SidebarRowProps {
   dropHandlers?: Record<string, unknown>;
   isValidDropTarget?: boolean;
   isInvalidDropTarget?: boolean;
+  onContextMenu?: (e: React.MouseEvent) => void;
 }
 
 function SidebarRow({
@@ -206,6 +218,7 @@ function SidebarRow({
   dropHandlers,
   isValidDropTarget,
   isInvalidDropTarget,
+  onContextMenu,
 }: SidebarRowProps) {
   const t = useTranslations('sidebar');
   const leftPad = isCollapsed ? 0 : ROW_PX_BASE + depth * INDENT_STEP;
@@ -213,6 +226,7 @@ function SidebarRow({
   return (
     <div
       {...(dropHandlers || {})}
+      onContextMenu={onContextMenu}
       style={{ paddingBlock: 'var(--density-sidebar-py)' }}
       className={cn(
         "group w-full flex items-center max-lg:min-h-[44px] text-sm transition-colors duration-150",
@@ -365,6 +379,7 @@ function MailboxTreeItem({
   isCollapsed,
   onUnreadFilterClick,
   colorful,
+  onContextMenu,
 }: {
   node: MailboxNode;
   selectedMailbox: string;
@@ -374,6 +389,7 @@ function MailboxTreeItem({
   isCollapsed: boolean;
   onUnreadFilterClick?: (mailboxId: string) => void;
   colorful: boolean;
+  onContextMenu?: (e: React.MouseEvent, node: MailboxNode) => void;
 }) {
   const tNotifications = useTranslations('notifications');
   const hasChildren = node.children.length > 0;
@@ -423,6 +439,7 @@ function MailboxTreeItem({
         dropHandlers={globalDragging ? (dropHandlers as Record<string, unknown>) : undefined}
         isValidDropTarget={isValidDropTarget}
         isInvalidDropTarget={isInvalidDropTarget}
+        onContextMenu={onContextMenu && !isVirtualNode ? (e) => onContextMenu(e, node) : undefined}
       />
 
       {hasChildren && isExpanded && !isCollapsed && node.children.map((child) => (
@@ -436,6 +453,7 @@ function MailboxTreeItem({
           isCollapsed={isCollapsed}
           onUnreadFilterClick={onUnreadFilterClick}
           colorful={colorful}
+          onContextMenu={onContextMenu}
         />
       ))}
     </>
@@ -610,6 +628,15 @@ export function Sidebar({
   onCompose: _onCompose,
   onSidebarClose,
   onUnreadFilterClick,
+  onMarkFolderRead,
+  onMarkFolderTreeRead,
+  onMarkAllFoldersRead,
+  onEmptyFolder,
+  onCreateSubfolder,
+  onCreateFolder,
+  onRenameFolder,
+  onDeleteFolder,
+  onRefreshMailboxes,
   className,
 }: SidebarProps) {
   const router = useRouter();
@@ -790,6 +817,23 @@ export function Sidebar({
     router.push('/settings');
   };
 
+  const {
+    contextMenu: mailboxContextMenu,
+    openContextMenu: openMailboxContextMenu,
+    closeContextMenu: closeMailboxContextMenu,
+    menuRef: mailboxMenuRef,
+  } = useContextMenu<MailboxContextTarget>();
+
+  const handleMailboxContextMenu = (e: React.MouseEvent, node: MailboxNode) => {
+    const mailbox = mailboxes.find(mb => mb.id === node.id);
+    if (!mailbox) return;
+    openMailboxContextMenu(e, { kind: "mailbox", mailbox, hasChildren: node.children.length > 0 });
+  };
+
+  const handleFoldersHeaderContextMenu = (e: React.MouseEvent) => {
+    openMailboxContextMenu(e, { kind: "folders-section" });
+  };
+
   return (
     <div
       className={cn(
@@ -866,7 +910,7 @@ export function Sidebar({
           </div>
         )}
 
-        <div>
+        <div onContextMenu={handleFoldersHeaderContextMenu}>
           <SidebarSectionHeader
             label={t("folders")}
             expanded={foldersExpanded}
@@ -894,6 +938,7 @@ export function Sidebar({
                     isCollapsed={isCollapsed}
                     onUnreadFilterClick={onUnreadFilterClick}
                     colorful={colorfulSidebarIcons}
+                    onContextMenu={handleMailboxContextMenu}
                   />
                 ))
               )}
@@ -934,6 +979,7 @@ export function Sidebar({
                           isCollapsed={isCollapsed}
                           onUnreadFilterClick={onUnreadFilterClick}
                           colorful={colorfulSidebarIcons}
+                          onContextMenu={handleMailboxContextMenu}
                         />
                       ))}
                     </div>
@@ -975,6 +1021,23 @@ export function Sidebar({
 
         {!isCollapsed && <PluginSlot name="sidebar-widget" className="border-t border-border" />}
       </div>
+
+      <MailboxContextMenu
+        target={mailboxContextMenu.data}
+        position={mailboxContextMenu.position}
+        isOpen={mailboxContextMenu.isOpen}
+        onClose={closeMailboxContextMenu}
+        menuRef={mailboxMenuRef}
+        onMarkFolderRead={onMarkFolderRead}
+        onMarkFolderTreeRead={onMarkFolderTreeRead}
+        onMarkAllFoldersRead={onMarkAllFoldersRead}
+        onEmptyFolder={onEmptyFolder}
+        onCreateSubfolder={onCreateSubfolder}
+        onCreateFolder={onCreateFolder}
+        onRenameFolder={onRenameFolder}
+        onDeleteFolder={onDeleteFolder}
+        onRefresh={onRefreshMailboxes}
+      />
     </div>
   );
 }

components/providers/intl-provider.tsx

@@ -3,6 +3,7 @@
 import { useEffect, useState } from 'react';
 import { NextIntlClientProvider } from 'next-intl';
 import { useLocaleStore } from '@/stores/locale-store';
+import csMessages from '@/locales/cs/common.json';
 import enMessages from '@/locales/en/common.json';
 import frMessages from '@/locales/fr/common.json';
 import jaMessages from '@/locales/ja/common.json';
@@ -15,11 +16,13 @@ import nlMessages from '@/locales/nl/common.json';
 import plMessages from '@/locales/pl/common.json';
 import ptMessages from '@/locales/pt/common.json';
 import ruMessages from '@/locales/ru/common.json';
+import trMessages from '@/locales/tr/common.json';
 import ukMessages from '@/locales/uk/common.json';
 import zhMessages from '@/locales/zh/common.json';
 
 // Pre-loaded translations (loaded at build time, not runtime)
 const ALL_MESSAGES = {
+  cs: csMessages,
   en: enMessages,
   fr: frMessages,
   ja: jaMessages,
@@ -32,6 +35,7 @@ const ALL_MESSAGES = {
   pl: plMessages,
   pt: ptMessages,
   ru: ruMessages,
+  tr: trMessages,
   uk: ukMessages,
   zh: zhMessages,
 };

components/settings/about-data-settings.tsx

@@ -7,22 +7,21 @@ import { useConfig } from '@/hooks/use-config';
 import { SettingsSection, SettingItem, ToggleSwitch } from './settings-section';
 import { Button } from '@/components/ui/button';
 import { usePolicyStore } from '@/stores/policy-store';
-import { ALL_DEBUG_CATEGORIES } from '@/stores/settings-store';
 import { ExternalLink } from 'lucide-react';
 import { SpamSiegeGame } from './spam-siege-game';
 
 const APP_VERSION = process.env.NEXT_PUBLIC_APP_VERSION || "0.0.0";
 const GIT_COMMIT = process.env.NEXT_PUBLIC_GIT_COMMIT || "unknown";
 
-export function AdvancedSettings() {
+export function AboutDataSettings() {
   const t = useTranslations('settings.advanced');
   const tCommon = useTranslations('common');
-  const { debugMode, debugCategories, senderFavicons, settingsSyncDisabled, updateSetting, resetToDefaults, exportSettings, importSettings } =
+  const { settingsSyncDisabled, updateSetting, resetToDefaults, exportSettings, importSettings } =
     useSettingsStore();
   const { settingsSyncEnabled } = useConfig();
   const [showResetConfirm, setShowResetConfirm] = useState(false);
   const fileInputRef = useRef<HTMLInputElement>(null);
-  const { isSettingLocked, isSettingHidden, isFeatureEnabled } = usePolicyStore();
+  const { isFeatureEnabled } = usePolicyStore();
   const [showGame, setShowGame] = useState(false);
   const logoClickCount = useRef(0);
   const logoClickTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
@@ -86,7 +85,6 @@ export function AdvancedSettings() {
   return (
     <>
       {showGame && <SpamSiegeGame onClose={() => setShowGame(false)} />}
-      {/* About */}
       <div className="rounded-lg border border-border bg-card p-5 mb-6">
         <div className="flex items-center gap-4">
           <button onClick={handleLogoClick} className="flex items-center gap-4 flex-1 text-left focus:outline-none group/about cursor-pointer" aria-label="About">
@@ -122,88 +120,48 @@ export function AdvancedSettings() {
         </div>
       </div>
 
-    <SettingsSection title={t('title')} description={t('description')}>
-      {/* Debug Mode */}
-      {!isSettingHidden('debugMode') && isFeatureEnabled('debugModeEnabled') && (
-      <SettingItem label={t('debug_mode.label')} description={t('debug_mode.description')} locked={isSettingLocked('debugMode')}>
-        <ToggleSwitch checked={debugMode} onChange={(checked) => updateSetting('debugMode', checked)} />
-      </SettingItem>
-      )}
+      <SettingsSection title={t('title')} description={t('description')}>
+        {settingsSyncEnabled && (
+          <SettingItem label={t('settings_sync.label')} description={t('settings_sync.description')}>
+            <ToggleSwitch checked={!settingsSyncDisabled} onChange={(checked) => updateSetting('settingsSyncDisabled', !checked)} />
+          </SettingItem>
+        )}
 
-      {/* Debug Categories */}
-      {debugMode && !isSettingHidden('debugMode') && isFeatureEnabled('debugModeEnabled') && (
-        <div className="ml-4 border-l-2 border-muted pl-4 space-y-1">
-          <p className="text-xs text-muted-foreground mb-2">{t('debug_categories.description')}</p>
-          {ALL_DEBUG_CATEGORIES.map((cat) => (
-            <SettingItem
-              key={cat.id}
-              label={t(`debug_categories.${cat.labelKey}`)}
-              description={t(`debug_categories.${cat.labelKey}_description`)}
-            >
-              <ToggleSwitch
-                checked={debugCategories?.[cat.id] !== false}
-                onChange={(checked) => {
-                  updateSetting('debugCategories', {
-                    ...debugCategories,
-                    [cat.id]: checked,
-                  });
-                }}
-              />
-            </SettingItem>
-          ))}
-        </div>
-      )}
-
-      {/* Settings Sync */}
-      {settingsSyncEnabled && (
-        <SettingItem label={t('settings_sync.label')} description={t('settings_sync.description')}>
-          <ToggleSwitch checked={!settingsSyncDisabled} onChange={(checked) => updateSetting('settingsSyncDisabled', !checked)} />
-        </SettingItem>
-      )}
-
-      {/* Sender Favicons (Experimental) */}
-      <SettingItem label={t('sender_favicons.label')} description={t('sender_favicons.description')}>
-        <ToggleSwitch checked={senderFavicons} onChange={(checked) => updateSetting('senderFavicons', checked)} />
-      </SettingItem>
-
-      {/* Export Settings */}
-      {isFeatureEnabled('settingsExportEnabled') && (
-      <SettingItem label={t('export_settings.label')} description={t('export_settings.description')}>
-        <Button variant="outline" size="sm" onClick={handleExport}>
-          {t('export_settings.button')}
-        </Button>
-      </SettingItem>
-      )}
-
-      {/* Import Settings */}
-      {isFeatureEnabled('settingsExportEnabled') && (
-      <SettingItem label={t('import_settings.label')} description={t('import_settings.description')}>
-        <>
-          <input
-            ref={fileInputRef}
-            type="file"
-            accept="application/json,.json"
-            onChange={handleFileChange}
-            className="hidden"
-          />
-          <Button variant="outline" size="sm" onClick={handleImport}>
-            {t('import_settings.button')}
+        {isFeatureEnabled('settingsExportEnabled') && (
+        <SettingItem label={t('export_settings.label')} description={t('export_settings.description')}>
+          <Button variant="outline" size="sm" onClick={handleExport}>
+            {t('export_settings.button')}
           </Button>
-        </>
-      </SettingItem>
-      )}
+        </SettingItem>
+        )}
 
-      {/* Reset Settings */}
-      <SettingItem label={t('reset_settings.label')} description={t('reset_settings.description')}>
-        <Button
-          variant={showResetConfirm ? 'destructive' : 'outline'}
-          size="sm"
-          onClick={handleReset}
-        >
-          {showResetConfirm ? tCommon('yes') : t('reset_settings.button')}
-        </Button>
-      </SettingItem>
-    </SettingsSection>
+        {isFeatureEnabled('settingsExportEnabled') && (
+        <SettingItem label={t('import_settings.label')} description={t('import_settings.description')}>
+          <>
+            <input
+              ref={fileInputRef}
+              type="file"
+              accept="application/json,.json"
+              onChange={handleFileChange}
+              className="hidden"
+            />
+            <Button variant="outline" size="sm" onClick={handleImport}>
+              {t('import_settings.button')}
+            </Button>
+          </>
+        </SettingItem>
+        )}
+
+        <SettingItem label={t('reset_settings.label')} description={t('reset_settings.description')}>
+          <Button
+            variant={showResetConfirm ? 'destructive' : 'outline'}
+            size="sm"
+            onClick={handleReset}
+          >
+            {showResetConfirm ? tCommon('yes') : t('reset_settings.button')}
+          </Button>
+        </SettingItem>
+      </SettingsSection>
     </>
   );
 }

components/settings/address-book-management-settings.tsx

@@ -2,13 +2,14 @@
 
 import { useEffect, useState } from "react";
 import { useTranslations } from "next-intl";
-import { Book, Pencil, Share2, Tag } from "lucide-react";
+import { Book, Pencil, Share2, Tag, Users } from "lucide-react";
 import { useContactStore } from "@/stores/contact-store";
 import { useAuthStore } from "@/stores/auth-store";
 import { toast } from "@/stores/toast-store";
 import { SettingsSection } from "./settings-section";
 import { cn } from "@/lib/utils";
-import type { AddressBook } from "@/lib/jmap/types";
+import type { AddressBook, AddressBookRights } from "@/lib/jmap/types";
+import { ShareCollectionDialog } from "./share-collection-dialog";
 
 function AddressBookEditRow({
   initial,
@@ -70,9 +71,10 @@ export function AddressBookManagementSettings() {
   const tContacts = useTranslations("contacts");
   const tSettings = useTranslations("settings.contacts");
   const { client } = useAuthStore();
-  const { addressBooks, contacts, supportsSync, fetchAddressBooks, renameAddressBook, renameKeyword } = useContactStore();
+  const { addressBooks, contacts, supportsSync, fetchAddressBooks, renameAddressBook, shareAddressBook, renameKeyword } = useContactStore();
   const [editingId, setEditingId] = useState<string | null>(null);
   const [editingKeyword, setEditingKeyword] = useState<string | null>(null);
+  const [sharingId, setSharingId] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(false);
 
   useEffect(() => {
@@ -148,6 +150,16 @@ export function AddressBookManagementSettings() {
               <Pencil className="w-3.5 h-3.5" />
             </button>
           )}
+          {!book.isShared && book.myRights?.mayShare && (
+            <button
+              type="button"
+              onClick={() => setSharingId(book.id)}
+              className="p-1.5 rounded-md hover:bg-muted text-muted-foreground hover:text-foreground transition-colors"
+              title={t("share")}
+            >
+              <Users className="w-3.5 h-3.5" />
+            </button>
+          )}
         </div>
       </div>
     );
@@ -242,6 +254,24 @@ export function AddressBookManagementSettings() {
         </div>
       </SettingsSection>
     </div>
+
+    {sharingId && client && (() => {
+      const book = addressBooks.find((b) => b.id === sharingId);
+      if (!book) return null;
+      return (
+        <ShareCollectionDialog
+          client={client}
+          kind="addressBook"
+          collectionName={book.name}
+          shareWith={book.shareWith}
+          ownAccountId={client.getAccountId()}
+          onShare={async (principalId, rights) => {
+            await shareAddressBook(client, book, principalId, rights as AddressBookRights | null);
+          }}
+          onClose={() => setSharingId(null)}
+        />
+      );
+    })()}
     </>
   );
 }

components/settings/appearance-settings.tsx

@@ -2,15 +2,13 @@
 
 import { useTranslations } from 'next-intl';
 import { useThemeStore } from '@/stores/theme-store';
-import { useSettingsStore, type ToolbarPosition, type Density } from '@/stores/settings-store';
-import { LanguageSwitcher } from '@/components/ui/language-switcher';
+import { useSettingsStore, type Density } from '@/stores/settings-store';
 import { SettingsSection, SettingItem, RadioGroup, ToggleSwitch } from './settings-section';
 import { cn } from '@/lib/utils';
 import { useTour } from '@/components/tour/tour-provider';
 import { Button } from '@/components/ui/button';
 import { PlayCircle } from 'lucide-react';
 import { usePolicyStore } from '@/stores/policy-store';
-import { useAccountStore } from '@/stores/account-store';
 
 const DENSITY_PREVIEW: Record<Density, { py: string; gap: string; showAvatar: boolean; showPreview: boolean }> = {
   'extra-compact': { py: 'py-0.5', gap: 'gap-1.5', showAvatar: false, showPreview: false },
@@ -66,16 +64,15 @@ function DensityPreview({ density }: { density: Density }) {
 
 export function AppearanceSettings() {
   const t = useTranslations('settings.appearance');
+  const tAdvanced = useTranslations('settings.advanced');
   const tTour = useTranslations('tour');
   const { theme, setTheme } = useThemeStore();
-  const { fontSize, density, animationsEnabled, toolbarPosition, showToolbarLabels, hideAccountSwitcher, showRailAccountList, enableUnifiedMailbox, colorfulSidebarIcons, updateSetting } = useSettingsStore();
+  const { fontSize, density, animationsEnabled, senderFavicons, showAvatarsInJunk, updateSetting } = useSettingsStore();
   const { startTour, resetTourCompletion } = useTour();
   const { isSettingLocked, isSettingHidden } = usePolicyStore();
-  const accounts = useAccountStore(s => s.accounts);
 
   return (
     <SettingsSection title={t('title')} description={t('description')}>
-      {/* Theme */}
       <SettingItem label={t('theme.label')} description={t('theme.description')}>
         <RadioGroup
           value={theme}
@@ -88,12 +85,6 @@ export function AppearanceSettings() {
         />
       </SettingItem>
 
-      {/* Language */}
-      <SettingItem label={t('language.label')} description={t('language.description')}>
-        <LanguageSwitcher />
-      </SettingItem>
-
-      {/* Font Size */}
       {!isSettingHidden('fontSize') && (
       <SettingItem label={t('font_size.label')} description={t('font_size.description')} locked={isSettingLocked('fontSize')}>
         <RadioGroup
@@ -108,7 +99,6 @@ export function AppearanceSettings() {
       </SettingItem>
       )}
 
-      {/* Density */}
       {!isSettingHidden('density') && (
       <SettingItem label={t('list_density.label')} description={t('list_density.description')} locked={isSettingLocked('density')}>
         <RadioGroup
@@ -127,64 +117,6 @@ export function AppearanceSettings() {
       </SettingItem>
       )}
 
-      {/* Toolbar Position */}
-      <SettingItem label={t('toolbar_position.label')} description={t('toolbar_position.description')}>
-        <RadioGroup
-          value={toolbarPosition}
-          onChange={(value) => updateSetting('toolbarPosition', value as ToolbarPosition)}
-          options={[
-            { value: 'top', label: t('toolbar_position.top') },
-            { value: 'below-subject', label: t('toolbar_position.below_subject') },
-          ]}
-        />
-      </SettingItem>
-
-      {/* Toolbar Labels */}
-      <SettingItem label={t('toolbar_labels.label')} description={t('toolbar_labels.description')}>
-        <ToggleSwitch
-          checked={showToolbarLabels}
-          onChange={(checked) => updateSetting('showToolbarLabels', checked)}
-        />
-      </SettingItem>
-
-      {/* Hide Account Switcher */}
-      <SettingItem label={t('hide_account_switcher.label')} description={t('hide_account_switcher.description')}>
-        <ToggleSwitch
-          checked={hideAccountSwitcher}
-          onChange={(checked) => updateSetting('hideAccountSwitcher', checked)}
-        />
-      </SettingItem>
-
-      {/* Show Rail Account List */}
-      <SettingItem label={t('show_rail_account_list.label')} description={t('show_rail_account_list.description')}>
-        <ToggleSwitch
-          checked={showRailAccountList}
-          onChange={(checked) => updateSetting('showRailAccountList', checked)}
-        />
-      </SettingItem>
-
-      {/* Colorful Sidebar Icons */}
-      <SettingItem label={t('colorful_sidebar_icons.label')} description={t('colorful_sidebar_icons.description')}>
-        <ToggleSwitch
-          checked={colorfulSidebarIcons}
-          onChange={(checked) => updateSetting('colorfulSidebarIcons', checked)}
-        />
-      </SettingItem>
-
-      {/* Unified Mailbox */}
-      {accounts.length > 1 && (
-        <SettingItem
-          label={t('unified_mailbox.label')}
-          description={t('unified_mailbox.description')}
-        >
-          <ToggleSwitch
-            checked={enableUnifiedMailbox}
-            onChange={(v) => updateSetting('enableUnifiedMailbox', v)}
-          />
-        </SettingItem>
-      )}
-
-      {/* Animations */}
       {!isSettingHidden('animationsEnabled') && (
       <SettingItem label={t('animations.label')} description={t('animations.description')} locked={isSettingLocked('animationsEnabled')}>
         <ToggleSwitch
@@ -194,7 +126,14 @@ export function AppearanceSettings() {
       </SettingItem>
       )}
 
-      {/* Restart Tour */}
+      <SettingItem label={tAdvanced('sender_favicons.label')} description={tAdvanced('sender_favicons.description')}>
+        <ToggleSwitch checked={senderFavicons} onChange={(checked) => updateSetting('senderFavicons', checked)} />
+      </SettingItem>
+
+      <SettingItem label={tAdvanced('show_avatars_in_junk.label')} description={tAdvanced('show_avatars_in_junk.description')}>
+        <ToggleSwitch checked={showAvatarsInJunk} onChange={(checked) => updateSetting('showAvatarsInJunk', checked)} />
+      </SettingItem>
+
       <SettingItem label={tTour('restart_title')} description={tTour('restart_desc')}>
         <Button
           variant="outline"

components/settings/calendar-management-settings.tsx

@@ -7,7 +7,9 @@ import { useAuthStore } from '@/stores/auth-store';
 import { getActiveAccountSlotHeaders } from '@/lib/auth/active-account-slot';
 import { toast } from '@/stores/toast-store';
 import { SettingsSection } from './settings-section';
-import { Plus, Pencil, Trash2, Calendar as CalendarIcon, Copy, Link, Upload, Globe, RefreshCw, Eraser } from 'lucide-react';
+import { Plus, Pencil, Trash2, Calendar as CalendarIcon, Copy, Link, Upload, Globe, RefreshCw, Eraser, Users } from 'lucide-react';
+import { ShareCollectionDialog } from './share-collection-dialog';
+import type { CalendarRights } from '@/lib/jmap/types';
 import { cn, formatDateTime } from '@/lib/utils';
 import { ICalImportModal } from '@/components/calendar/ical-import-modal';
 import { ICalSubscriptionModal } from '@/components/calendar/ical-subscription-modal';
@@ -83,7 +85,7 @@ function CalendarColorPicker({
   );
 }
 
-function CalendarEditForm({
+export function CalendarEditForm({
   initial,
   onSave,
   onCancel,
@@ -153,7 +155,7 @@ export { CalendarColorPicker, CALENDAR_COLORS };
 export function CalendarManagementSettings() {
   const t = useTranslations('calendar.management');
   const { client, serverUrl, username } = useAuthStore();
-  const { calendars, updateCalendar, createCalendar, removeCalendar, clearCalendarEvents, fetchCalendars, icalSubscriptions, removeICalSubscription, refreshICalSubscription, isSubscriptionCalendar } = useCalendarStore();
+  const { calendars, updateCalendar, shareCalendar, createCalendar, removeCalendar, clearCalendarEvents, fetchCalendars, icalSubscriptions, removeICalSubscription, refreshICalSubscription, isSubscriptionCalendar } = useCalendarStore();
 
   const [discoveredCalDavUrls, setDiscoveredCalDavUrls] = useState<Record<string, string | null>>({});
   const [wellKnownCalDavUrl, setWellKnownCalDavUrl] = useState<string | null>(null);
@@ -164,6 +166,7 @@ export function CalendarManagementSettings() {
   const [clearingId, setClearingId] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(false);
   const [colorPickerId, setColorPickerId] = useState<string | null>(null);
+  const [sharingId, setSharingId] = useState<string | null>(null);
   const [showImportModal, setShowImportModal] = useState(false);
   const [showSubscriptionModal, setShowSubscriptionModal] = useState(false);
   const [editingSubscription, setEditingSubscription] = useState<typeof icalSubscriptions[0] | null>(null);
@@ -522,6 +525,16 @@ export function CalendarManagementSettings() {
                 >
                   <Pencil className="w-3.5 h-3.5" />
                 </button>
+                {cal.myRights?.mayShare && !cal.isShared && !isSubscriptionCalendar(cal.id) && (
+                  <button
+                    type="button"
+                    onClick={() => setSharingId(cal.id)}
+                    className="p-1.5 rounded-md hover:bg-muted text-muted-foreground hover:text-foreground transition-colors"
+                    title={t('share')}
+                  >
+                    <Users className="w-3.5 h-3.5" />
+                  </button>
+                )}
                 <button
                   type="button"
                   onClick={() => setClearingId(cal.id)}
@@ -689,6 +702,24 @@ export function CalendarManagementSettings() {
           onClose={() => setEditingSubscription(null)}
         />
       )}
+
+      {sharingId && client && (() => {
+        const cal = calendars.find((c) => c.id === sharingId);
+        if (!cal) return null;
+        return (
+          <ShareCollectionDialog
+            client={client}
+            kind="calendar"
+            collectionName={cal.name}
+            shareWith={cal.shareWith}
+            ownAccountId={client.getAccountId()}
+            onShare={async (principalId, rights) => {
+              await shareCalendar(client, cal.id, principalId, rights as CalendarRights | null);
+            }}
+            onClose={() => setSharingId(null)}
+          />
+        );
+      })()}
     </SettingsSection>
   );
 }

components/settings/composing-settings.tsx

@@ -0,0 +1,170 @@
+"use client";
+
+import { useState, useCallback } from 'react';
+import { useTranslations } from 'next-intl';
+import { useConfig } from '@/hooks/use-config';
+import { useSettingsStore } from '@/stores/settings-store';
+import { SettingsSection, SettingItem, Select, ToggleSwitch } from './settings-section';
+import { Mail, X } from 'lucide-react';
+import {
+  SUPPORTED_SUB_ADDRESS_DELIMITERS,
+  isSupportedSubAddressDelimiter,
+  isValidSubAddressDelimiter,
+} from '@/lib/sub-addressing';
+
+const CUSTOM_DELIMITER_SENTINEL = '__custom__';
+const DEFAULT_CUSTOM_DELIMITER = '~';
+
+export function ComposingSettings() {
+  const t = useTranslations('settings.email_behavior');
+  const { appName } = useConfig();
+  const [defaultMailStatus, setDefaultMailStatus] = useState<'idle' | 'success' | 'error'>('idle');
+  const [newKeyword, setNewKeyword] = useState('');
+
+  const {
+    autoSelectReplyIdentity,
+    attachmentReminderEnabled,
+    attachmentReminderKeywords,
+    subAddressDelimiter,
+    updateSetting,
+  } = useSettingsStore();
+
+  const handleSetDefaultMailProgram = useCallback(() => {
+    try {
+      if (typeof navigator !== 'undefined' && navigator.registerProtocolHandler) {
+        navigator.registerProtocolHandler('mailto', `${window.location.origin}/compose?mailto=%s`);
+        setDefaultMailStatus('success');
+      }
+    } catch {
+      setDefaultMailStatus('error');
+    }
+  }, []);
+
+  return (
+    <SettingsSection title={t('title')} description={t('description')}>
+      <SettingItem label={t('auto_select_reply_identity.label')} description={t('auto_select_reply_identity.description')}>
+        <ToggleSwitch
+          checked={autoSelectReplyIdentity}
+          onChange={(checked) => updateSetting('autoSelectReplyIdentity', checked)}
+        />
+      </SettingItem>
+
+      <SettingItem
+        label={t('sub_address_delimiter.label')}
+        description={t('sub_address_delimiter.description', { delimiter: subAddressDelimiter })}
+      >
+        <div className="flex flex-col items-end gap-2">
+          <Select
+            value={isSupportedSubAddressDelimiter(subAddressDelimiter) ? subAddressDelimiter : CUSTOM_DELIMITER_SENTINEL}
+            onChange={(value) => {
+              if (value === CUSTOM_DELIMITER_SENTINEL) {
+                if (isSupportedSubAddressDelimiter(subAddressDelimiter)) {
+                  updateSetting('subAddressDelimiter', DEFAULT_CUSTOM_DELIMITER);
+                }
+              } else {
+                updateSetting('subAddressDelimiter', value);
+              }
+            }}
+            options={[
+              ...SUPPORTED_SUB_ADDRESS_DELIMITERS.map((delim) => ({
+                value: delim,
+                label: t('sub_address_delimiter.option', { delimiter: delim }),
+              })),
+              { value: CUSTOM_DELIMITER_SENTINEL, label: t('sub_address_delimiter.custom') },
+            ]}
+          />
+          {!isSupportedSubAddressDelimiter(subAddressDelimiter) && (
+            <input
+              type="text"
+              maxLength={1}
+              value={subAddressDelimiter}
+              onChange={(e) => {
+                const next = e.target.value.slice(0, 1);
+                if (next && isValidSubAddressDelimiter(next)) {
+                  updateSetting('subAddressDelimiter', next);
+                }
+              }}
+              aria-label={t('sub_address_delimiter.custom_input_label')}
+              placeholder={DEFAULT_CUSTOM_DELIMITER}
+              className="w-16 px-2 py-1 text-sm font-mono text-center bg-background border border-border rounded-md focus:outline-none focus:ring-1 focus:ring-ring"
+            />
+          )}
+        </div>
+      </SettingItem>
+
+      <SettingItem label={t('attachment_reminder.label')} description={t('attachment_reminder.description')}>
+        <ToggleSwitch
+          checked={attachmentReminderEnabled}
+          onChange={(checked) => updateSetting('attachmentReminderEnabled', checked)}
+        />
+      </SettingItem>
+      {attachmentReminderEnabled && (
+        <div className="py-3 border-b border-border space-y-2">
+          <div>
+            <label className="text-sm font-medium text-foreground">{t('attachment_reminder.keywords_label')}</label>
+            <p className="text-xs text-muted-foreground mt-1">{t('attachment_reminder.keywords_description')}</p>
+          </div>
+          <div className="flex flex-wrap gap-1.5">
+            {attachmentReminderKeywords.map((kw) => (
+              <span key={kw} className="inline-flex items-center gap-1 px-2 py-0.5 rounded-full text-xs bg-muted text-foreground">
+                {kw}
+                <button
+                  type="button"
+                  aria-label={t('attachment_reminder.remove')}
+                  onClick={() => updateSetting('attachmentReminderKeywords', attachmentReminderKeywords.filter(k => k !== kw))}
+                  className="text-muted-foreground hover:text-foreground"
+                >
+                  <X className="w-3 h-3" />
+                </button>
+              </span>
+            ))}
+          </div>
+          <form
+            className="flex gap-2"
+            onSubmit={(e) => {
+              e.preventDefault();
+              const trimmed = newKeyword.trim().toLowerCase();
+              if (trimmed && !attachmentReminderKeywords.includes(trimmed)) {
+                updateSetting('attachmentReminderKeywords', [...attachmentReminderKeywords, trimmed]);
+              }
+              setNewKeyword('');
+            }}
+          >
+            <input
+              type="text"
+              value={newKeyword}
+              onChange={(e) => setNewKeyword(e.target.value)}
+              placeholder={t('attachment_reminder.add_placeholder')}
+              className="flex-1 min-w-0 px-2 py-1 text-sm bg-background border border-border rounded-md focus:outline-none focus:ring-1 focus:ring-ring"
+            />
+            <button
+              type="submit"
+              disabled={!newKeyword.trim()}
+              className="px-3 py-1 text-sm bg-muted hover:bg-accent rounded-md disabled:opacity-50 disabled:cursor-not-allowed"
+            >
+              {t('attachment_reminder.add')}
+            </button>
+          </form>
+        </div>
+      )}
+
+      <SettingItem label={t('default_mail_program.label')} description={t('default_mail_program.description', { appName: appName || 'Bulwark' })}>
+        <div className="flex flex-col items-end gap-1">
+          <button
+            onClick={handleSetDefaultMailProgram}
+            className="flex items-center gap-2 px-3 py-1.5 bg-muted hover:bg-accent rounded-md transition-colors"
+          >
+            <Mail className="w-4 h-4" />
+            <span className="text-sm text-foreground">{t('default_mail_program.button')}</span>
+          </button>
+          {defaultMailStatus === 'success' && (
+            <p className="text-xs text-green-600 dark:text-green-400">{t('default_mail_program.success')}</p>
+          )}
+          {defaultMailStatus === 'error' && (
+            <p className="text-xs text-destructive">{t('default_mail_program.error')}</p>
+          )}
+        </div>
+      </SettingItem>
+    </SettingsSection>
+  );
+}

components/settings/contacts-settings.tsx

@@ -4,11 +4,12 @@ import { useState, useCallback } from "react";
 import { useTranslations } from "next-intl";
 import { Upload, Download } from "lucide-react";
 import { Button } from "@/components/ui/button";
-import { SettingsSection, SettingItem } from "./settings-section";
+import { SettingsSection, SettingItem, ToggleSwitch } from "./settings-section";
 import { ContactImportDialog } from "@/components/contacts/contact-import-dialog";
 import { exportContacts } from "@/components/contacts/contact-export";
 import { useContactStore } from "@/stores/contact-store";
 import { useAuthStore } from "@/stores/auth-store";
+import { useSettingsStore } from "@/stores/settings-store";
 import { toast } from "@/stores/toast-store";
 
 export function ContactsSettings() {
@@ -20,6 +21,8 @@ export function ContactsSettings() {
     supportsSync,
     importContacts,
   } = useContactStore();
+  const groupContactsByLetter = useSettingsStore((s) => s.groupContactsByLetter);
+  const updateSetting = useSettingsStore((s) => s.updateSetting);
   const [showImport, setShowImport] = useState(false);
 
   const individuals = contacts.filter(c => c.kind !== "group");
@@ -55,6 +58,16 @@ export function ContactsSettings() {
       title={tSettings("title")}
       description={tSettings("description")}
     >
+      <SettingItem
+        label={tSettings("group_by_letter_label")}
+        description={tSettings("group_by_letter_description")}
+      >
+        <ToggleSwitch
+          checked={groupContactsByLetter}
+          onChange={(checked) => updateSetting("groupContactsByLetter", checked)}
+        />
+      </SettingItem>
+
       <SettingItem
         label={tSettings("import_label")}
         description={tSettings("import_description")}

components/settings/content-senders-settings.tsx

@@ -0,0 +1,81 @@
+"use client";
+
+import { useState } from 'react';
+import { useTranslations } from 'next-intl';
+import { useSettingsStore } from '@/stores/settings-store';
+import { SettingsSection, SettingItem, Select, ToggleSwitch } from './settings-section';
+import { TrustedSendersModal } from '@/components/trusted-senders-modal';
+import { ChevronRight } from 'lucide-react';
+import { usePolicyStore } from '@/stores/policy-store';
+import { useContactStore } from '@/stores/contact-store';
+
+export function ContentSendersSettings() {
+  const t = useTranslations('settings.email_behavior');
+  const [showTrustedModal, setShowTrustedModal] = useState(false);
+  const { isSettingLocked, isSettingHidden } = usePolicyStore();
+
+  const {
+    externalContentPolicy,
+    emailAlwaysLightMode,
+    trustedSenders,
+    trustedSendersAddressBook,
+    updateSetting,
+  } = useSettingsStore();
+  const { trustedSenderEmails } = useContactStore();
+
+  const getTrustedSendersCount = () => {
+    const count = trustedSendersAddressBook ? trustedSenderEmails.length : trustedSenders.length;
+    if (count === 0) return t('trusted_senders.count_zero');
+    if (count === 1) return t('trusted_senders.count_one');
+    return t('trusted_senders.count_other', { count });
+  };
+
+  return (
+    <SettingsSection title={t('title')} description={t('description')}>
+      {!isSettingHidden('externalContentPolicy') && (
+      <SettingItem label={t('external_content.label')} description={t('external_content.description')} locked={isSettingLocked('externalContentPolicy')}>
+        <Select
+          value={externalContentPolicy}
+          onChange={(value) =>
+            updateSetting('externalContentPolicy', value as 'ask' | 'block' | 'allow')
+          }
+          options={[
+            { value: 'ask', label: t('external_content.ask') },
+            { value: 'block', label: t('external_content.block') },
+            { value: 'allow', label: t('external_content.allow') },
+          ]}
+        />
+      </SettingItem>
+      )}
+
+      <SettingItem label={t('always_light_mode.label')} description={t('always_light_mode.description')}>
+        <ToggleSwitch
+          checked={emailAlwaysLightMode}
+          onChange={(checked) => updateSetting('emailAlwaysLightMode', checked)}
+        />
+      </SettingItem>
+
+      <SettingItem label={t('trusted_senders.label')} description={t('trusted_senders.description')}>
+        <button
+          onClick={() => setShowTrustedModal(true)}
+          className="flex items-center gap-2 px-3 py-1.5 bg-muted hover:bg-accent rounded-md transition-colors"
+        >
+          <span className="text-sm text-foreground">{getTrustedSendersCount()}</span>
+          <ChevronRight className="w-4 h-4 text-muted-foreground" />
+        </button>
+      </SettingItem>
+
+      <SettingItem label={t('trusted_senders.use_address_book_label')} description={t('trusted_senders.use_address_book_description')}>
+        <ToggleSwitch
+          checked={trustedSendersAddressBook}
+          onChange={(checked) => updateSetting('trustedSendersAddressBook', checked)}
+        />
+      </SettingItem>
+
+      <TrustedSendersModal
+        isOpen={showTrustedModal}
+        onClose={() => setShowTrustedModal(false)}
+      />
+    </SettingsSection>
+  );
+}

components/settings/debug-settings.tsx

@@ -0,0 +1,51 @@
+"use client";
+
+import { useTranslations } from 'next-intl';
+import { useSettingsStore, ALL_DEBUG_CATEGORIES } from '@/stores/settings-store';
+import { SettingsSection, SettingItem, ToggleSwitch } from './settings-section';
+import { usePolicyStore } from '@/stores/policy-store';
+
+export function DebugSettings() {
+  const t = useTranslations('settings.advanced');
+  const { debugMode, debugCategories, updateSetting } = useSettingsStore();
+  const { isSettingLocked, isSettingHidden, isFeatureEnabled } = usePolicyStore();
+
+  if (isSettingHidden('debugMode') || !isFeatureEnabled('debugModeEnabled')) {
+    return (
+      <SettingsSection title={t('debug_mode.label')} description={t('debug_mode.description')}>
+        <p className="text-sm text-muted-foreground py-2">{t('debug_mode.description')}</p>
+      </SettingsSection>
+    );
+  }
+
+  return (
+    <SettingsSection title={t('debug_mode.label')} description={t('debug_mode.description')}>
+      <SettingItem label={t('debug_mode.label')} description={t('debug_mode.description')} locked={isSettingLocked('debugMode')}>
+        <ToggleSwitch checked={debugMode} onChange={(checked) => updateSetting('debugMode', checked)} />
+      </SettingItem>
+
+      {debugMode && (
+        <div className="ml-4 border-l-2 border-muted pl-4 space-y-1">
+          <p className="text-xs text-muted-foreground mb-2">{t('debug_categories.description')}</p>
+          {ALL_DEBUG_CATEGORIES.map((cat) => (
+            <SettingItem
+              key={cat.id}
+              label={t(`debug_categories.${cat.labelKey}`)}
+              description={t(`debug_categories.${cat.labelKey}_description`)}
+            >
+              <ToggleSwitch
+                checked={debugCategories?.[cat.id] !== false}
+                onChange={(checked) => {
+                  updateSetting('debugCategories', {
+                    ...debugCategories,
+                    [cat.id]: checked,
+                  });
+                }}
+              />
+            </SettingItem>
+          ))}
+        </div>
+      )}
+    </SettingsSection>
+  );
+}

components/settings/language-settings.tsx

@@ -0,0 +1,17 @@
+"use client";
+
+import { useTranslations } from 'next-intl';
+import { LanguageSwitcher } from '@/components/ui/language-switcher';
+import { SettingsSection, SettingItem } from './settings-section';
+
+export function LanguageSettings() {
+  const t = useTranslations('settings.appearance');
+
+  return (
+    <SettingsSection title={t('language.label')} description={t('language.description')}>
+      <SettingItem label={t('language.label')} description={t('language.description')}>
+        <LanguageSwitcher />
+      </SettingItem>
+    </SettingsSection>
+  );
+}

components/settings/layout-settings.tsx

@@ -0,0 +1,162 @@
+"use client";
+
+import { useTranslations } from 'next-intl';
+import { useSettingsStore, type ToolbarPosition, type MailLayout } from '@/stores/settings-store';
+import { SettingsSection, SettingItem, RadioGroup, ToggleSwitch } from './settings-section';
+import { cn } from '@/lib/utils';
+import { usePolicyStore } from '@/stores/policy-store';
+import { useAccountStore } from '@/stores/account-store';
+
+const MAIL_LAYOUT_PREVIEW_ROWS = [
+  { sender: 'Alice', subject: 'Quarterly roadmap', preview: 'The draft is ready for review.', selected: false },
+  { sender: 'Nadia', subject: 'Design sync', preview: 'Pushed updated mocks and notes.', selected: true },
+  { sender: 'Billing', subject: 'Invoice 1042', preview: 'Your receipt is attached.', selected: false },
+];
+
+function MailLayoutPreview({
+  value,
+  t,
+}: {
+  value: MailLayout;
+  t: (key: string) => string;
+}) {
+  const isSplit = value === 'split';
+
+  return (
+    <div className="mt-3 rounded-xl border border-border bg-background p-3">
+      <div>
+        <div className="text-sm font-medium text-foreground">{t(`mail_layout.${value}`)}</div>
+        <div className="mt-1 text-xs text-muted-foreground">{t(`mail_layout.${value}_description`)}</div>
+      </div>
+
+      <div className="mt-3 overflow-hidden rounded-lg border border-border bg-muted/20">
+        <div className="flex h-28">
+          <div className="w-11 border-r border-border bg-muted/40" />
+
+          {isSplit ? (
+            <>
+              <div className="w-28 border-r border-border bg-background">
+                {MAIL_LAYOUT_PREVIEW_ROWS.map((row) => (
+                  <div
+                    key={row.subject}
+                    className={cn(
+                      'border-b border-border px-2 py-1.5 text-[10px] last:border-b-0',
+                      row.selected && 'bg-primary/10'
+                    )}
+                  >
+                    <div className="truncate font-medium text-foreground">{row.sender}</div>
+                    <div className="truncate text-muted-foreground">{row.subject}</div>
+                  </div>
+                ))}
+              </div>
+              <div className="flex-1 bg-background px-3 py-2">
+                <div className="h-2.5 w-20 rounded bg-foreground/10" />
+                <div className="mt-2 h-2 w-full rounded bg-foreground/10" />
+                <div className="mt-1.5 h-2 w-5/6 rounded bg-foreground/10" />
+                <div className="mt-1.5 h-2 w-2/3 rounded bg-foreground/10" />
+              </div>
+            </>
+          ) : (
+            <div className="flex-1 bg-background px-2 py-2">
+              <div className="space-y-1.5">
+                {MAIL_LAYOUT_PREVIEW_ROWS.map((row) => (
+                  <div
+                    key={row.subject}
+                    className={cn(
+                      'rounded-md px-2 py-1 text-[10px]',
+                      row.selected ? 'bg-primary/10' : 'bg-muted/20'
+                    )}
+                  >
+                    <div className="truncate text-foreground">
+                      <span className="font-medium">{row.sender}</span>
+                      <span className="mx-1.5 text-muted-foreground">{row.subject}</span>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export function LayoutSettings() {
+  const t = useTranslations('settings.appearance');
+  const tEmail = useTranslations('settings.email_behavior');
+  const { toolbarPosition, showToolbarLabels, hideAccountSwitcher, showRailAccountList, enableUnifiedMailbox, colorfulSidebarIcons, mailLayout, updateSetting } = useSettingsStore();
+  const { isSettingLocked, isSettingHidden } = usePolicyStore();
+  const accounts = useAccountStore(s => s.accounts);
+
+  return (
+    <SettingsSection title={t('title')} description={t('description')}>
+      {!isSettingHidden('mailLayout') && (
+      <SettingItem label={tEmail('mail_layout.label')} description={tEmail('mail_layout.description')} locked={isSettingLocked('mailLayout')}>
+        <div className="w-[22rem] max-w-full">
+          <RadioGroup
+            value={mailLayout}
+            onChange={(value) => updateSetting('mailLayout', value as MailLayout)}
+            options={[
+              { value: 'split', label: tEmail('mail_layout.split') },
+              { value: 'focus', label: tEmail('mail_layout.focus') },
+            ]}
+          />
+          <MailLayoutPreview value={mailLayout} t={tEmail} />
+        </div>
+      </SettingItem>
+      )}
+
+      <SettingItem label={t('toolbar_position.label')} description={t('toolbar_position.description')}>
+        <RadioGroup
+          value={toolbarPosition}
+          onChange={(value) => updateSetting('toolbarPosition', value as ToolbarPosition)}
+          options={[
+            { value: 'top', label: t('toolbar_position.top') },
+            { value: 'below-subject', label: t('toolbar_position.below_subject') },
+          ]}
+        />
+      </SettingItem>
+
+      <SettingItem label={t('toolbar_labels.label')} description={t('toolbar_labels.description')}>
+        <ToggleSwitch
+          checked={showToolbarLabels}
+          onChange={(checked) => updateSetting('showToolbarLabels', checked)}
+        />
+      </SettingItem>
+
+      <SettingItem label={t('hide_account_switcher.label')} description={t('hide_account_switcher.description')}>
+        <ToggleSwitch
+          checked={hideAccountSwitcher}
+          onChange={(checked) => updateSetting('hideAccountSwitcher', checked)}
+        />
+      </SettingItem>
+
+      <SettingItem label={t('show_rail_account_list.label')} description={t('show_rail_account_list.description')}>
+        <ToggleSwitch
+          checked={showRailAccountList}
+          onChange={(checked) => updateSetting('showRailAccountList', checked)}
+        />
+      </SettingItem>
+
+      <SettingItem label={t('colorful_sidebar_icons.label')} description={t('colorful_sidebar_icons.description')}>
+        <ToggleSwitch
+          checked={colorfulSidebarIcons}
+          onChange={(checked) => updateSetting('colorfulSidebarIcons', checked)}
+        />
+      </SettingItem>
+
+      {accounts.length > 1 && (
+        <SettingItem
+          label={t('unified_mailbox.label')}
+          description={t('unified_mailbox.description')}
+        >
+          <ToggleSwitch
+            checked={enableUnifiedMailbox}
+            onChange={(v) => updateSetting('enableUnifiedMailbox', v)}
+          />
+        </SettingItem>
+      )}
+    </SettingsSection>
+  );
+}

components/settings/notification-settings.tsx

@@ -1,13 +1,32 @@
 "use client";
 
+import { useEffect, useState } from 'react';
 import { useTranslations } from 'next-intl';
 import { useSettingsStore } from '@/stores/settings-store';
 import { SettingsSection, SettingItem, ToggleSwitch, Select } from './settings-section';
 import { playNotificationSound, NOTIFICATION_SOUNDS } from '@/lib/notification-sound';
 import type { NotificationSoundChoice } from '@/lib/notification-sound';
 import { Button } from '@/components/ui/button';
-import { Volume2 } from 'lucide-react';
+import { CheckCircle2, Volume2, XCircle } from 'lucide-react';
 import { usePolicyStore } from '@/stores/policy-store';
+import { useAuthStore } from '@/stores/auth-store';
+import { ConfirmDialog } from '@/components/ui/confirm-dialog';
+import { useConfirmDialog } from '@/hooks/use-confirm-dialog';
+import {
+  DEFAULT_RELAY_BASE_URL,
+  WebPushUnsupportedError,
+  disableWebPush,
+  enableWebPush,
+  isWebPushEnabled,
+  isWebPushSupported,
+} from '@/lib/web-push';
+
+type PushStatus =
+  | { kind: 'idle' }
+  | { kind: 'busy' }
+  | { kind: 'enabled' }
+  | { kind: 'unsupported' }
+  | { kind: 'error'; message: string };
 
 export function NotificationSettings() {
   const t = useTranslations('settings.notifications');
@@ -21,6 +40,77 @@ export function NotificationSettings() {
     updateSetting,
   } = useSettingsStore();
   const { isSettingLocked, isSettingHidden } = usePolicyStore();
+  const client = useAuthStore((s) => s.client);
+  const username = useAuthStore((s) => s.username);
+  const { dialogProps: confirmDialogProps, confirm: confirmDialog } = useConfirmDialog();
+
+  const supported = typeof window !== 'undefined' && isWebPushSupported();
+  const [relayUrl, setRelayUrl] = useState(DEFAULT_RELAY_BASE_URL);
+  const [pushStatus, setPushStatus] = useState<PushStatus>(
+    supported ? { kind: 'idle' } : { kind: 'unsupported' },
+  );
+
+  useEffect(() => {
+    if (!supported) return;
+    void (async () => {
+      const enabled = await isWebPushEnabled();
+      if (enabled) setPushStatus({ kind: 'enabled' });
+    })();
+  }, [supported]);
+
+  const trimmedRelay = relayUrl.trim().replace(/\/+$/, '');
+  const isValidRelay = /^https?:\/\/.+/i.test(trimmedRelay);
+  const busy = pushStatus.kind === 'busy';
+
+  const handleEnablePush = async () => {
+    if (!client) {
+      setPushStatus({ kind: 'error', message: 'Sign in first' });
+      return;
+    }
+    if (!isValidRelay) {
+      setPushStatus({ kind: 'error', message: 'Enter a valid https:// URL' });
+      return;
+    }
+    setPushStatus({ kind: 'busy' });
+    try {
+      await enableWebPush({
+        client,
+        relayBaseUrl: trimmedRelay,
+        accountLabel: username ?? undefined,
+      });
+      setPushStatus({ kind: 'enabled' });
+    } catch (err) {
+      if (err instanceof WebPushUnsupportedError) {
+        setPushStatus({ kind: 'unsupported' });
+        return;
+      }
+      setPushStatus({
+        kind: 'error',
+        message: err instanceof Error ? err.message : 'Failed to enable push',
+      });
+    }
+  };
+
+  const handleDisablePush = async () => {
+    if (!client) return;
+    const confirmed = await confirmDialog({
+      title: t('push.confirm_disable_title'),
+      message: t('push.confirm_disable_message'),
+      confirmText: t('push.disable'),
+      variant: 'destructive',
+    });
+    if (!confirmed) return;
+    setPushStatus({ kind: 'busy' });
+    try {
+      await disableWebPush({ client, relayBaseUrl: trimmedRelay });
+      setPushStatus({ kind: 'idle' });
+    } catch (err) {
+      setPushStatus({
+        kind: 'error',
+        message: err instanceof Error ? err.message : 'Failed to disable push',
+      });
+    }
+  };
 
   const soundOptions = NOTIFICATION_SOUNDS.map((s) => ({
     value: s.id,
@@ -29,6 +119,46 @@ export function NotificationSettings() {
 
   return (
     <div className="space-y-8">
+      <SettingsSection title={t('push.title')} description={t('push.description')}>
+        <div className="rounded-md border p-4 space-y-3">
+          <div className="flex items-center justify-between gap-3">
+            <label className="text-sm font-medium" htmlFor="push-relay-url">
+              {t('push.relay_label')}
+            </label>
+            <PushStatusBadge status={pushStatus} t={t} />
+          </div>
+          <p className="text-xs text-muted-foreground">{t('push.relay_desc')}</p>
+          <input
+            id="push-relay-url"
+            type="url"
+            inputMode="url"
+            autoComplete="off"
+            spellCheck={false}
+            value={relayUrl}
+            onChange={(e) => setRelayUrl(e.target.value)}
+            placeholder={t('push.relay_placeholder')}
+            disabled={busy || pushStatus.kind === 'unsupported'}
+            className="w-full rounded border bg-background px-3 py-2 text-sm disabled:opacity-50"
+          />
+          <div className="flex flex-wrap gap-2">
+            <Button
+              onClick={handleEnablePush}
+              disabled={busy || pushStatus.kind === 'unsupported' || !isValidRelay || !client}
+            >
+              {pushStatus.kind === 'enabled' ? t('push.reenable') : t('push.enable')}
+            </Button>
+            {pushStatus.kind === 'enabled' && (
+              <Button variant="outline" onClick={handleDisablePush} disabled={busy}>
+                {t('push.disable')}
+              </Button>
+            )}
+          </div>
+          {pushStatus.kind === 'unsupported' && (
+            <p className="text-xs text-muted-foreground">{t('push.ios_hint')}</p>
+          )}
+        </div>
+      </SettingsSection>
+
       <SettingsSection title={t('sound_selection.title')} description={t('sound_selection.description')}>
         <SettingItem
           label={t('sound_selection.choose')}
@@ -118,6 +248,45 @@ export function NotificationSettings() {
           />
         </SettingItem>
       </SettingsSection>
+
+      <ConfirmDialog {...confirmDialogProps} />
     </div>
   );
 }
+
+function PushStatusBadge({
+  status,
+  t,
+}: {
+  status: PushStatus;
+  t: ReturnType<typeof useTranslations>;
+}) {
+  if (status.kind === 'enabled') {
+    return (
+      <span className="inline-flex items-center gap-1 text-xs text-emerald-600 dark:text-emerald-400">
+        <CheckCircle2 className="w-3.5 h-3.5" />
+        {t('push.status_active')}
+      </span>
+    );
+  }
+  if (status.kind === 'busy') {
+    return <span className="text-xs text-muted-foreground">{t('push.status_busy')}</span>;
+  }
+  if (status.kind === 'unsupported') {
+    return (
+      <span className="inline-flex items-center gap-1 text-xs text-muted-foreground">
+        <XCircle className="w-3.5 h-3.5" />
+        {t('push.status_unsupported')}
+      </span>
+    );
+  }
+  if (status.kind === 'error') {
+    return (
+      <span className="inline-flex items-center gap-1 text-xs text-destructive" title={status.message}>
+        <XCircle className="w-3.5 h-3.5" />
+        {status.message}
+      </span>
+    );
+  }
+  return <span className="text-xs text-muted-foreground">{t('push.status_inactive')}</span>;
+}

components/settings/reading-settings.tsx

@@ -1,118 +1,23 @@
 "use client";
 
-import { useState, useCallback } from 'react';
+import { useState } from 'react';
 import { useTranslations } from 'next-intl';
-import { useConfig } from '@/hooks/use-config';
 import { useSettingsStore } from '@/stores/settings-store';
-import type { ArchiveMode, HoverAction, MailLayout } from '@/stores/settings-store';
+import type { ArchiveMode, HoverAction } from '@/stores/settings-store';
 import { ALL_HOVER_ACTIONS } from '@/stores/settings-store';
 import { useAuthStore } from '@/stores/auth-store';
 import { useEmailStore } from '@/stores/email-store';
 import { cn } from '@/lib/utils';
-import { RadioGroup, SettingsSection, SettingItem, Select, ToggleSwitch } from './settings-section';
-import { TrustedSendersModal } from '@/components/trusted-senders-modal';
-import { ChevronRight, AlertTriangle, FolderSync, Loader2, Mail, X } from 'lucide-react';
+import { SettingsSection, SettingItem, Select, ToggleSwitch } from './settings-section';
+import { AlertTriangle, FolderSync, Loader2 } from 'lucide-react';
 import { usePolicyStore } from '@/stores/policy-store';
-import { useContactStore } from '@/stores/contact-store';
 
-const MAIL_LAYOUT_PREVIEW_ROWS = [
-  { sender: 'Alice', subject: 'Quarterly roadmap', preview: 'The draft is ready for review.', selected: false },
-  { sender: 'Nadia', subject: 'Design sync', preview: 'Pushed updated mocks and notes.', selected: true },
-  { sender: 'Billing', subject: 'Invoice 1042', preview: 'Your receipt is attached.', selected: false },
-];
-
-function MailLayoutPreview({
-  value,
-  t,
-}: {
-  value: MailLayout;
-  t: (key: string) => string;
-}) {
-  const isSplit = value === 'split';
-
-  return (
-    <div className="mt-3 rounded-xl border border-border bg-background p-3">
-      <div>
-        <div className="text-sm font-medium text-foreground">{t(`mail_layout.${value}`)}</div>
-        <div className="mt-1 text-xs text-muted-foreground">{t(`mail_layout.${value}_description`)}</div>
-      </div>
-
-      <div className="mt-3 overflow-hidden rounded-lg border border-border bg-muted/20">
-        <div className="flex h-28">
-          <div className="w-11 border-r border-border bg-muted/40" />
-
-          {isSplit ? (
-            <>
-              <div className="w-28 border-r border-border bg-background">
-                {MAIL_LAYOUT_PREVIEW_ROWS.map((row) => (
-                  <div
-                    key={row.subject}
-                    className={cn(
-                      'border-b border-border px-2 py-1.5 text-[10px] last:border-b-0',
-                      row.selected && 'bg-primary/10'
-                    )}
-                  >
-                    <div className="truncate font-medium text-foreground">{row.sender}</div>
-                    <div className="truncate text-muted-foreground">{row.subject}</div>
-                  </div>
-                ))}
-              </div>
-              <div className="flex-1 bg-background px-3 py-2">
-                <div className="h-2.5 w-20 rounded bg-foreground/10" />
-                <div className="mt-2 h-2 w-full rounded bg-foreground/10" />
-                <div className="mt-1.5 h-2 w-5/6 rounded bg-foreground/10" />
-                <div className="mt-1.5 h-2 w-2/3 rounded bg-foreground/10" />
-              </div>
-            </>
-          ) : (
-            <div className="flex-1 bg-background px-2 py-2">
-              <div className="space-y-1.5">
-                {MAIL_LAYOUT_PREVIEW_ROWS.map((row) => (
-                  <div
-                    key={row.subject}
-                    className={cn(
-                      'rounded-md px-2 py-1 text-[10px]',
-                      row.selected ? 'bg-primary/10' : 'bg-muted/20'
-                    )}
-                  >
-                    <div className="truncate text-foreground">
-                      <span className="font-medium">{row.sender}</span>
-                      <span className="mx-1.5 text-muted-foreground">{row.subject}</span>
-                      <span className="text-muted-foreground/80">{row.preview}</span>
-                    </div>
-                  </div>
-                ))}
-              </div>
-            </div>
-          )}
-        </div>
-      </div>
-    </div>
-  );
-}
-
-export function EmailSettings() {
+export function ReadingSettings() {
   const t = useTranslations('settings.email_behavior');
-  const { appName } = useConfig();
-  const [showTrustedModal, setShowTrustedModal] = useState(false);
   const [isReorganizing, setIsReorganizing] = useState(false);
   const [reorganizeResult, setReorganizeResult] = useState<string | null>(null);
-  const [defaultMailStatus, setDefaultMailStatus] = useState<'idle' | 'success' | 'error'>('idle');
   const { isSettingLocked, isSettingHidden, isFeatureEnabled } = usePolicyStore();
 
-  const handleSetDefaultMailProgram = useCallback(() => {
-    try {
-      if (typeof navigator !== 'undefined' && navigator.registerProtocolHandler) {
-        navigator.registerProtocolHandler('mailto', `${window.location.origin}/compose?mailto=%s`);
-        setDefaultMailStatus('success');
-      }
-    } catch {
-      setDefaultMailStatus('error');
-    }
-  }, []);
-
-  const [newKeyword, setNewKeyword] = useState('');
-
   const {
     markAsReadDelay,
     deleteAction,
@@ -120,33 +25,17 @@ export function EmailSettings() {
     showPreview,
     mailLayout,
     disableThreading,
-    autoSelectReplyIdentity,
     plainTextMode,
     emailsPerPage,
-    externalContentPolicy,
     mailAttachmentAction,
     attachmentPosition,
-    emailAlwaysLightMode,
     archiveMode,
     hoverActions,
     hoverActionsMode,
     hoverActionsCorner,
-    trustedSenders,
-    trustedSendersAddressBook,
-    attachmentReminderEnabled,
-    attachmentReminderKeywords,
     hideInlineImageAttachments,
     updateSetting,
   } = useSettingsStore();
-  const { trustedSenderEmails } = useContactStore();
-
-  // Get count label for trusted senders button
-  const getTrustedSendersCount = () => {
-    const count = trustedSendersAddressBook ? trustedSenderEmails.length : trustedSenders.length;
-    if (count === 0) return t('trusted_senders.count_zero');
-    if (count === 1) return t('trusted_senders.count_one');
-    return t('trusted_senders.count_other', { count });
-  };
 
   const isFocusedLayout = mailLayout === 'focus';
 
@@ -163,8 +52,6 @@ export function EmailSettings() {
 
     try {
       const archiveId = archiveMailbox.originalId || archiveMailbox.id;
-
-      // Fetch all emails in the root archive mailbox
       const emails = await client.getEmailsInMailbox(archiveId);
       let movedCount = 0;
 
@@ -173,10 +60,8 @@ export function EmailSettings() {
         const year = emailDate.getFullYear().toString();
         const month = (emailDate.getMonth() + 1).toString().padStart(2, '0');
 
-        // Re-read mailboxes from store each iteration in case new ones were created
         let currentMailboxes = useEmailStore.getState().mailboxes;
 
-        // Find or create year subfolder
         let yearMailbox = currentMailboxes.find(
           m => m.name === year && m.parentId === archiveId
         );
@@ -190,7 +75,6 @@ export function EmailSettings() {
           await client.moveEmail(email.id, yearMailbox.id);
           movedCount++;
         } else {
-          // month mode
           const yearId = yearMailbox.originalId || yearMailbox.id;
           let monthMailbox = currentMailboxes.find(
             m => m.name === month && m.parentId === yearId
@@ -215,7 +99,6 @@ export function EmailSettings() {
 
   return (
     <SettingsSection title={t('title')} description={t('description')}>
-      {/* Mark as Read */}
       {!isSettingHidden('markAsReadDelay') && (
       <SettingItem label={t('mark_read.label')} description={t('mark_read.description')} locked={isSettingLocked('markAsReadDelay')}>
         <Select
@@ -231,7 +114,6 @@ export function EmailSettings() {
       </SettingItem>
       )}
 
-      {/* Delete Action */}
       {!isSettingHidden('deleteAction') && (
       <SettingItem label={t('delete_action.label')} description={t('delete_action.description')} locked={isSettingLocked('deleteAction')}>
         <div className="flex flex-col gap-2">
@@ -253,7 +135,6 @@ export function EmailSettings() {
       </SettingItem>
       )}
 
-      {/* Archive Mode */}
       <SettingItem label={t('archive_mode.label')} description={t('archive_mode.description')}>
         <div className="flex flex-col gap-2">
           <Select
@@ -287,7 +168,6 @@ export function EmailSettings() {
         </div>
       </SettingItem>
 
-      {/* Permanently Delete Junk */}
       <SettingItem label={t('permanently_delete_junk.label')} description={t('permanently_delete_junk.description')}>
         <ToggleSwitch
           checked={permanentlyDeleteJunk}
@@ -295,23 +175,6 @@ export function EmailSettings() {
         />
       </SettingItem>
 
-      {!isSettingHidden('mailLayout') && (
-      <SettingItem label={t('mail_layout.label')} description={t('mail_layout.description')} locked={isSettingLocked('mailLayout')}>
-        <div className="w-[22rem] max-w-full">
-          <RadioGroup
-            value={mailLayout}
-            onChange={(value) => updateSetting('mailLayout', value as MailLayout)}
-            options={[
-              { value: 'split', label: t('mail_layout.split') },
-              { value: 'focus', label: t('mail_layout.focus') },
-            ]}
-          />
-          <MailLayoutPreview value={mailLayout} t={t} />
-        </div>
-      </SettingItem>
-      )}
-
-      {/* Show Preview */}
       {!isSettingHidden('showPreview') && (
       <SettingItem
         label={t('show_preview.label')}
@@ -322,7 +185,6 @@ export function EmailSettings() {
       </SettingItem>
       )}
 
-      {/* Disable Thread Grouping */}
       <SettingItem label={t('disable_threading.label')} description={t('disable_threading.description')}>
         <ToggleSwitch
           checked={disableThreading}
@@ -330,7 +192,6 @@ export function EmailSettings() {
         />
       </SettingItem>
 
-      {/* Plain Text Mode */}
       <SettingItem label={t('plain_text_mode.label')} description={t('plain_text_mode.description')}>
         <ToggleSwitch
           checked={plainTextMode}
@@ -338,71 +199,6 @@ export function EmailSettings() {
         />
       </SettingItem>
 
-      <SettingItem label={t('auto_select_reply_identity.label')} description={t('auto_select_reply_identity.description')}>
-        <ToggleSwitch
-          checked={autoSelectReplyIdentity}
-          onChange={(checked) => updateSetting('autoSelectReplyIdentity', checked)}
-        />
-      </SettingItem>
-
-      {/* Attachment Reminder */}
-      <SettingItem label={t('attachment_reminder.label')} description={t('attachment_reminder.description')}>
-        <ToggleSwitch
-          checked={attachmentReminderEnabled}
-          onChange={(checked) => updateSetting('attachmentReminderEnabled', checked)}
-        />
-      </SettingItem>
-      {attachmentReminderEnabled && (
-        <div className="py-3 border-b border-border space-y-2">
-          <div>
-            <label className="text-sm font-medium text-foreground">{t('attachment_reminder.keywords_label')}</label>
-            <p className="text-xs text-muted-foreground mt-1">{t('attachment_reminder.keywords_description')}</p>
-          </div>
-          <div className="flex flex-wrap gap-1.5">
-            {attachmentReminderKeywords.map((kw) => (
-              <span key={kw} className="inline-flex items-center gap-1 px-2 py-0.5 rounded-full text-xs bg-muted text-foreground">
-                {kw}
-                <button
-                  type="button"
-                  aria-label={t('attachment_reminder.remove')}
-                  onClick={() => updateSetting('attachmentReminderKeywords', attachmentReminderKeywords.filter(k => k !== kw))}
-                  className="text-muted-foreground hover:text-foreground"
-                >
-                  <X className="w-3 h-3" />
-                </button>
-              </span>
-            ))}
-          </div>
-          <form
-            className="flex gap-2"
-            onSubmit={(e) => {
-              e.preventDefault();
-              const trimmed = newKeyword.trim().toLowerCase();
-              if (trimmed && !attachmentReminderKeywords.includes(trimmed)) {
-                updateSetting('attachmentReminderKeywords', [...attachmentReminderKeywords, trimmed]);
-              }
-              setNewKeyword('');
-            }}
-          >
-            <input
-              type="text"
-              value={newKeyword}
-              onChange={(e) => setNewKeyword(e.target.value)}
-              placeholder={t('attachment_reminder.add_placeholder')}
-              className="flex-1 min-w-0 px-2 py-1 text-sm bg-background border border-border rounded-md focus:outline-none focus:ring-1 focus:ring-ring"
-            />
-            <button
-              type="submit"
-              disabled={!newKeyword.trim()}
-              className="px-3 py-1 text-sm bg-muted hover:bg-accent rounded-md disabled:opacity-50 disabled:cursor-not-allowed"
-            >
-              {t('attachment_reminder.add')}
-            </button>
-          </form>
-        </div>
-      )}
-
-      {/* Hide inline images from attachment list */}
       <SettingItem label={t('hide_inline_image_attachments.label')} description={t('hide_inline_image_attachments.description')}>
         <ToggleSwitch
           checked={hideInlineImageAttachments}
@@ -410,7 +206,6 @@ export function EmailSettings() {
         />
       </SettingItem>
 
-      {/* Quick Hover Actions */}
       {isFeatureEnabled('hoverActionsConfigEnabled') && (
       <div className="py-3 border-b border-border space-y-3">
         <div>
@@ -443,7 +238,6 @@ export function EmailSettings() {
           })}
         </div>
 
-        {/* Hover Actions Display Mode */}
         <div className="pt-2 space-y-2">
           <label className="text-xs font-medium text-foreground">{t('hover_actions.mode_label')}</label>
           <div className="flex gap-2">
@@ -465,7 +259,6 @@ export function EmailSettings() {
           </div>
         </div>
 
-        {/* Corner Selection (only when floating) */}
         {hoverActionsMode === 'floating' && (
           <div className="pt-1 space-y-2">
             <label className="text-xs font-medium text-foreground">{t('hover_actions.corner_label')}</label>
@@ -513,7 +306,6 @@ export function EmailSettings() {
         />
       </SettingItem>
 
-      {/* Emails Per Page */}
       {!isSettingHidden('emailsPerPage') && (
       <SettingItem label={t('emails_per_page.label')} description={t('emails_per_page.description')} locked={isSettingLocked('emailsPerPage')}>
         <Select
@@ -528,75 +320,6 @@ export function EmailSettings() {
         />
       </SettingItem>
       )}
-
-      {/* Always Light Mode for Emails */}
-      <SettingItem label={t('always_light_mode.label')} description={t('always_light_mode.description')}>
-        <ToggleSwitch
-          checked={emailAlwaysLightMode}
-          onChange={(checked) => updateSetting('emailAlwaysLightMode', checked)}
-        />
-      </SettingItem>
-
-      {/* External Content */}
-      {!isSettingHidden('externalContentPolicy') && (
-      <SettingItem label={t('external_content.label')} description={t('external_content.description')} locked={isSettingLocked('externalContentPolicy')}>
-        <Select
-          value={externalContentPolicy}
-          onChange={(value) =>
-            updateSetting('externalContentPolicy', value as 'ask' | 'block' | 'allow')
-          }
-          options={[
-            { value: 'ask', label: t('external_content.ask') },
-            { value: 'block', label: t('external_content.block') },
-            { value: 'allow', label: t('external_content.allow') },
-          ]}
-        />
-      </SettingItem>
-      )}
-
-      {/* Default Mail Program */}
-      <SettingItem label={t('default_mail_program.label')} description={t('default_mail_program.description', { appName: appName || 'Bulwark' })}>
-        <div className="flex flex-col items-end gap-1">
-          <button
-            onClick={handleSetDefaultMailProgram}
-            className="flex items-center gap-2 px-3 py-1.5 bg-muted hover:bg-accent rounded-md transition-colors"
-          >
-            <Mail className="w-4 h-4" />
-            <span className="text-sm text-foreground">{t('default_mail_program.button')}</span>
-          </button>
-          {defaultMailStatus === 'success' && (
-            <p className="text-xs text-green-600 dark:text-green-400">{t('default_mail_program.success')}</p>
-          )}
-          {defaultMailStatus === 'error' && (
-            <p className="text-xs text-destructive">{t('default_mail_program.error')}</p>
-          )}
-        </div>
-      </SettingItem>
-
-      {/* Trusted Senders */}
-      <SettingItem label={t('trusted_senders.label')} description={t('trusted_senders.description')}>
-        <button
-          onClick={() => setShowTrustedModal(true)}
-          className="flex items-center gap-2 px-3 py-1.5 bg-muted hover:bg-accent rounded-md transition-colors"
-        >
-          <span className="text-sm text-foreground">{getTrustedSendersCount()}</span>
-          <ChevronRight className="w-4 h-4 text-muted-foreground" />
-        </button>
-      </SettingItem>
-
-      {/* Trusted Senders - address book storage */}
-      <SettingItem label={t('trusted_senders.use_address_book_label')} description={t('trusted_senders.use_address_book_description')}>
-        <ToggleSwitch
-          checked={trustedSendersAddressBook}
-          onChange={(checked) => updateSetting('trustedSendersAddressBook', checked)}
-        />
-      </SettingItem>
-
-      {/* Trusted Senders Modal */}
-      <TrustedSendersModal
-        isOpen={showTrustedModal}
-        onClose={() => setShowTrustedModal(false)}
-      />
     </SettingsSection>
   );
 }

components/settings/share-collection-dialog.tsx

@@ -0,0 +1,347 @@
+"use client";
+
+import { useEffect, useMemo, useRef, useState } from "react";
+import { useTranslations } from "next-intl";
+import { Button } from "@/components/ui/button";
+import { X, Loader2, UserPlus, Trash2, Users, ChevronDown } from "lucide-react";
+import type { IJMAPClient } from "@/lib/jmap/client-interface";
+import type { Principal, CalendarRights, AddressBookRights } from "@/lib/jmap/types";
+import { toast } from "@/stores/toast-store";
+
+type ShareKind = "calendar" | "addressBook";
+type AnyRights = CalendarRights | AddressBookRights;
+
+type RolePreset = "freeBusy" | "read" | "readWrite" | "manager" | "custom";
+
+const CALENDAR_PRESETS: Record<Exclude<RolePreset, "custom">, CalendarRights> = {
+  freeBusy: {
+    mayReadFreeBusy: true, mayReadItems: false, mayWriteAll: false, mayWriteOwn: false,
+    mayUpdatePrivate: false, mayRSVP: false, mayShare: false, mayDelete: false,
+  },
+  read: {
+    mayReadFreeBusy: true, mayReadItems: true, mayWriteAll: false, mayWriteOwn: false,
+    mayUpdatePrivate: false, mayRSVP: false, mayShare: false, mayDelete: false,
+  },
+  readWrite: {
+    mayReadFreeBusy: true, mayReadItems: true, mayWriteAll: true, mayWriteOwn: true,
+    mayUpdatePrivate: true, mayRSVP: true, mayShare: false, mayDelete: false,
+  },
+  manager: {
+    mayReadFreeBusy: true, mayReadItems: true, mayWriteAll: true, mayWriteOwn: true,
+    mayUpdatePrivate: true, mayRSVP: true, mayShare: true, mayDelete: true,
+  },
+};
+
+const ADDRESS_BOOK_PRESETS: Record<Exclude<RolePreset, "custom" | "freeBusy">, AddressBookRights> = {
+  read: { mayRead: true, mayWrite: false, mayShare: false, mayDelete: false },
+  readWrite: { mayRead: true, mayWrite: true, mayShare: false, mayDelete: false },
+  manager: { mayRead: true, mayWrite: true, mayShare: true, mayDelete: true },
+};
+
+function detectCalendarPreset(r: CalendarRights): RolePreset {
+  for (const [name, preset] of Object.entries(CALENDAR_PRESETS) as [Exclude<RolePreset, "custom">, CalendarRights][]) {
+    if ((Object.keys(preset) as (keyof CalendarRights)[]).every((k) => preset[k] === r[k])) {
+      return name;
+    }
+  }
+  return "custom";
+}
+
+function detectAddressBookPreset(r: AddressBookRights): RolePreset {
+  for (const [name, preset] of Object.entries(ADDRESS_BOOK_PRESETS) as [Exclude<RolePreset, "custom" | "freeBusy">, AddressBookRights][]) {
+    const keys = Object.keys(preset) as (keyof AddressBookRights)[];
+    if (keys.every((k) => preset[k] === (r[k] ?? false))) {
+      return name;
+    }
+  }
+  return "custom";
+}
+
+interface ShareCollectionDialogProps {
+  client: IJMAPClient;
+  kind: ShareKind;
+  collectionName: string;
+  shareWith: Record<string, AnyRights> | null | undefined;
+  ownAccountId: string;
+  onShare: (principalId: string, rights: AnyRights | null) => Promise<void>;
+  onClose: () => void;
+}
+
+export function ShareCollectionDialog({
+  client,
+  kind,
+  collectionName,
+  shareWith,
+  ownAccountId,
+  onShare,
+  onClose,
+}: ShareCollectionDialogProps) {
+  const t = useTranslations("sharing");
+  const tCommon = useTranslations("common");
+  const modalRef = useRef<HTMLDivElement>(null);
+  const [principals, setPrincipals] = useState<Principal[]>([]);
+  const [loadingPrincipals, setLoadingPrincipals] = useState(true);
+  const [search, setSearch] = useState("");
+  const [savingId, setSavingId] = useState<string | null>(null);
+  const [showAdd, setShowAdd] = useState(false);
+
+  // Load principals on mount
+  useEffect(() => {
+    let cancelled = false;
+    setLoadingPrincipals(true);
+    client.getPrincipals().then((list) => {
+      if (cancelled) return;
+      // Exclude the user themselves and any principal that already has a share
+      const existing = new Set(Object.keys(shareWith || {}));
+      const filtered = list.filter((p) => p.id !== ownAccountId && !existing.has(p.id));
+      setPrincipals(filtered);
+      setLoadingPrincipals(false);
+    }).catch(() => {
+      if (!cancelled) setLoadingPrincipals(false);
+    });
+    return () => { cancelled = true; };
+  }, [client, ownAccountId, shareWith]);
+
+  // Map principal id -> Principal for displayed shares
+  const allPrincipalsById = useMemo(() => {
+    const map = new Map<string, Principal>();
+    for (const p of principals) map.set(p.id, p);
+    return map;
+  }, [principals]);
+
+  // Close on Escape, focus trap, click outside
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") onClose();
+    };
+    document.addEventListener("keydown", onKey);
+    return () => document.removeEventListener("keydown", onKey);
+  }, [onClose]);
+
+  const handleSetRights = async (principalId: string, preset: RolePreset) => {
+    if (preset === "custom") return; // custom is read-only here
+    const rights = kind === "calendar"
+      ? CALENDAR_PRESETS[preset as keyof typeof CALENDAR_PRESETS]
+      : ADDRESS_BOOK_PRESETS[preset as keyof typeof ADDRESS_BOOK_PRESETS];
+    if (!rights) return;
+    setSavingId(principalId);
+    try {
+      await onShare(principalId, rights);
+      toast.success(t("share_updated"));
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : t("share_failed"));
+    } finally {
+      setSavingId(null);
+    }
+  };
+
+  const handleRemove = async (principalId: string) => {
+    setSavingId(principalId);
+    try {
+      await onShare(principalId, null);
+      toast.success(t("share_removed"));
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : t("share_failed"));
+    } finally {
+      setSavingId(null);
+    }
+  };
+
+  const handleAdd = async (principal: Principal) => {
+    const defaultPreset: RolePreset = "read";
+    const rights = kind === "calendar"
+      ? CALENDAR_PRESETS[defaultPreset]
+      : ADDRESS_BOOK_PRESETS[defaultPreset];
+    setSavingId(principal.id);
+    try {
+      await onShare(principal.id, rights);
+      // Move principal out of the "to add" list
+      setPrincipals((prev) => prev.filter((p) => p.id !== principal.id));
+      setShowAdd(false);
+      setSearch("");
+      toast.success(t("share_added"));
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : t("share_failed"));
+    } finally {
+      setSavingId(null);
+    }
+  };
+
+  const filteredPrincipals = useMemo(() => {
+    const q = search.trim().toLowerCase();
+    if (!q) return principals;
+    return principals.filter((p) =>
+      p.name.toLowerCase().includes(q) ||
+      p.email?.toLowerCase().includes(q) ||
+      p.description?.toLowerCase().includes(q)
+    );
+  }, [principals, search]);
+
+  const sharedEntries = useMemo(() => {
+    return Object.entries(shareWith || {}) as [string, AnyRights][];
+  }, [shareWith]);
+
+  const presetOptions = kind === "calendar"
+    ? ["freeBusy", "read", "readWrite", "manager"] as const
+    : ["read", "readWrite", "manager"] as const;
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center">
+      <div className="absolute inset-0 bg-black/50 backdrop-blur-[1px]" onClick={onClose} aria-hidden="true" />
+      <div
+        ref={modalRef}
+        role="dialog"
+        aria-modal="true"
+        aria-label={t("title", { name: collectionName })}
+        className="relative bg-background border border-border rounded-lg shadow-xl w-full max-w-lg mx-4 animate-in zoom-in-95 duration-200 max-h-[85vh] flex flex-col"
+      >
+        <div className="flex items-center justify-between px-6 py-4 border-b border-border">
+          <div className="flex items-center gap-2">
+            <Users className="w-5 h-5 text-primary" />
+            <h2 className="text-lg font-semibold">{t("title", { name: collectionName })}</h2>
+          </div>
+          <button
+            onClick={onClose}
+            className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground"
+            aria-label={tCommon("close")}
+          >
+            <X className="w-5 h-5" />
+          </button>
+        </div>
+
+        <div className="px-6 py-4 space-y-4 overflow-y-auto">
+          <p className="text-sm text-muted-foreground">{t("description")}</p>
+
+          {sharedEntries.length === 0 && !showAdd && (
+            <div className="text-sm text-muted-foreground italic py-4 text-center">
+              {t("no_shares")}
+            </div>
+          )}
+
+          {sharedEntries.length > 0 && (
+            <ul className="divide-y divide-border rounded-md border border-border overflow-hidden">
+              {sharedEntries.map(([principalId, rights]) => {
+                const principal = allPrincipalsById.get(principalId);
+                const preset = kind === "calendar"
+                  ? detectCalendarPreset(rights as CalendarRights)
+                  : detectAddressBookPreset(rights as AddressBookRights);
+                return (
+                  <li key={principalId} className="flex items-center gap-3 px-3 py-2.5">
+                    <div className="flex-1 min-w-0">
+                      <div className="text-sm font-medium truncate">
+                        {principal?.name || principal?.email || principalId}
+                      </div>
+                      {principal?.description && (
+                        <div className="text-xs text-muted-foreground truncate">
+                          {principal.description}
+                        </div>
+                      )}
+                    </div>
+                    <div className="relative">
+                      <select
+                        value={preset}
+                        onChange={(e) => handleSetRights(principalId, e.target.value as RolePreset)}
+                        disabled={savingId === principalId}
+                        className="appearance-none rounded-md border border-input bg-background pl-3 pr-8 py-1.5 text-xs focus:outline-none focus:ring-2 focus:ring-ring disabled:opacity-50"
+                      >
+                        {presetOptions.map((p) => (
+                          <option key={p} value={p}>{t(`preset.${p}`)}</option>
+                        ))}
+                        {preset === "custom" && (
+                          <option value="custom">{t("preset.custom")}</option>
+                        )}
+                      </select>
+                      <ChevronDown className="w-3 h-3 absolute right-2 top-1/2 -translate-y-1/2 pointer-events-none text-muted-foreground" />
+                    </div>
+                    <button
+                      onClick={() => handleRemove(principalId)}
+                      disabled={savingId === principalId}
+                      className="p-1.5 rounded-md hover:bg-destructive/10 text-muted-foreground hover:text-destructive transition-colors disabled:opacity-50"
+                      aria-label={t("remove")}
+                      title={t("remove")}
+                    >
+                      {savingId === principalId
+                        ? <Loader2 className="w-4 h-4 animate-spin" />
+                        : <Trash2 className="w-4 h-4" />}
+                    </button>
+                  </li>
+                );
+              })}
+            </ul>
+          )}
+
+          {!showAdd && (
+            <Button
+              variant="outline"
+              onClick={() => setShowAdd(true)}
+              className="w-full"
+            >
+              <UserPlus className="w-4 h-4 mr-2" />
+              {t("add_person")}
+            </Button>
+          )}
+
+          {showAdd && (
+            <div className="space-y-2 border border-border rounded-md p-3">
+              <input
+                type="text"
+                value={search}
+                onChange={(e) => setSearch(e.target.value)}
+                placeholder={t("search_placeholder")}
+                className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
+                autoFocus
+              />
+              <div className="max-h-48 overflow-y-auto -mx-1">
+                {loadingPrincipals && (
+                  <div className="flex items-center justify-center py-4 text-muted-foreground">
+                    <Loader2 className="w-4 h-4 animate-spin mr-2" />
+                    {t("loading_principals")}
+                  </div>
+                )}
+                {!loadingPrincipals && filteredPrincipals.length === 0 && (
+                  <div className="text-xs text-muted-foreground text-center py-3">
+                    {search.trim() ? t("no_match") : t("no_principals")}
+                  </div>
+                )}
+                {!loadingPrincipals && filteredPrincipals.map((p) => (
+                  <button
+                    key={p.id}
+                    onClick={() => handleAdd(p)}
+                    disabled={savingId === p.id}
+                    className="w-full text-left px-3 py-2 rounded-md hover:bg-muted disabled:opacity-50 transition-colors"
+                  >
+                    <div className="flex items-center gap-2">
+                      <div className="flex-1 min-w-0">
+                        <div className="text-sm font-medium truncate flex items-center gap-2">
+                          {p.name}
+                          {p.type === "group" && (
+                            <span className="text-[10px] uppercase font-normal text-muted-foreground bg-muted rounded px-1 py-0.5">
+                              {t("group")}
+                            </span>
+                          )}
+                        </div>
+                        {p.email && p.email !== p.name && (
+                          <div className="text-xs text-muted-foreground truncate">{p.email}</div>
+                        )}
+                      </div>
+                      {savingId === p.id && <Loader2 className="w-4 h-4 animate-spin" />}
+                    </div>
+                  </button>
+                ))}
+              </div>
+              <div className="flex justify-end pt-1">
+                <Button variant="ghost" size="sm" onClick={() => { setShowAdd(false); setSearch(""); }}>
+                  {tCommon("cancel")}
+                </Button>
+              </div>
+            </div>
+          )}
+        </div>
+
+        <div className="flex items-center justify-end gap-2 px-6 py-4 border-t border-border">
+          <Button onClick={onClose}>{tCommon("close")}</Button>
+        </div>
+      </div>
+    </div>
+  );
+}

components/ui/avatar.tsx

@@ -140,9 +140,11 @@ interface AvatarProps {
   contactPhotoUri?: string;
   size?: "sm" | "md" | "lg";
   className?: string;
+  /** When true, suppress all image sources (favicons, plugin avatars, profile pics, contact photos) and render initials only. */
+  disableImages?: boolean;
 }
 
-export function Avatar({ name, email, contactPhotoUri, size = "md", className }: AvatarProps) {
+export function Avatar({ name, email, contactPhotoUri, size = "md", className, disableImages = false }: AvatarProps) {
   const [imgError, setImgError] = useState(false);
   const [pluginAvatarUrl, setPluginAvatarUrl] = useState<string | null>(null);
   const [pluginAvatarFailed, setPluginAvatarFailed] = useState(false);
@@ -222,9 +224,11 @@ export function Avatar({ name, email, contactPhotoUri, size = "md", className }:
   // Priority: contact photo > plugin avatar (e.g. Gravatar) > custom avatar > profile picture > company favicon > initials
   const customAvatar = devMode && email ? CUSTOM_AVATARS[email.toLowerCase()] : null;
   const pluginAvatar = pluginAvatarFailed ? null : pluginAvatarUrl;
-  const imgSrc = !imgError && !domainFailed
-    ? resolvedContactPhoto || pluginAvatar || customAvatar || profilePic || (showFavicon ? `/api/favicon?domain=${encodeURIComponent(faviconDomain!)}` : null)
-    : (resolvedContactPhoto || pluginAvatar || customAvatar || profilePic || null);
+  const imgSrc = disableImages
+    ? null
+    : !imgError && !domainFailed
+      ? resolvedContactPhoto || pluginAvatar || customAvatar || profilePic || (showFavicon ? `/api/favicon?domain=${encodeURIComponent(faviconDomain!)}` : null)
+      : (resolvedContactPhoto || pluginAvatar || customAvatar || profilePic || null);
 
   const handleImgError = useCallback(() => {
     // If the plugin avatar just failed, mark it and fall through to the next source

components/ui/flag-icons.tsx

@@ -45,9 +45,22 @@ export function FlagKR(props: FlagProps) {
   return (
     <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 3 2" width={W} height={H} className={flagClass} {...props}>
       <rect width="3" height="2" fill="#fff" />
-      <circle cx="1.5" cy="1" r="0.55" fill="#CD2E3A" />
-      <path d="M1.5,1 a0.275,0.275 0 0,1 0,0.55 a0.275,0.275 0 0,0 0,-0.55" fill="#0047A0" />
-      <path d="M1.5,1 a0.275,0.275 0 0,0 0,-0.55 a0.275,0.275 0 0,1 0,0.55" fill="#0047A0" />
+      <path d="M1.5 0.5 a0.45 0.45 0 1 1 0 0.9 a0.45 0.45 0 1 0 0 -0.9" fill="#CD2E3A" />
+      <path d="M1.5 1.5 a0.45 0.45 0 1 1 0 -0.9 a0.45 0.45 0 1 0 0 0.9" fill="#0047A0" />
+      <circle cx="1.5" cy="0.8" r="0.225" fill="#0047A0" />
+      <circle cx="1.5" cy="1.2" r="0.225" fill="#CD2E3A" />
+      <g stroke="#000" strokeWidth="0.06" strokeLinecap="round">
+        <line x1="0.42" y1="0.35" x2="0.78" y2="0.35" />
+        <line x1="0.42" y1="0.46" x2="0.78" y2="0.46" />
+        <line x1="0.42" y1="0.57" x2="0.78" y2="0.57" />
+        <line x1="2.22" y1="0.35" x2="2.58" y2="0.35" />
+        <line x1="2.22" y1="0.57" x2="2.58" y2="0.57" />
+        <line x1="0.42" y1="1.43" x2="0.78" y2="1.43" />
+        <line x1="0.42" y1="1.65" x2="0.78" y2="1.65" />
+        <line x1="2.22" y1="1.43" x2="2.58" y2="1.43" />
+        <line x1="2.22" y1="1.54" x2="2.58" y2="1.54" />
+        <line x1="2.22" y1="1.65" x2="2.58" y2="1.65" />
+      </g>
     </svg>
   );
 }
@@ -139,6 +152,18 @@ export function FlagRU(props: FlagProps) {
   );
 }
 
+/** Turkey - Red with white crescent and star */
+export function FlagTR(props: FlagProps) {
+  return (
+    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 30 20" width={W} height={H} className={flagClass} {...props}>
+      <rect width="30" height="20" fill="#E30A17" />
+      <circle cx="10" cy="10" r="6" fill="#fff" />
+      <circle cx="11.5" cy="10" r="5" fill="#E30A17" />
+      <polygon points="19.5,7.8 19.994,9.32 21.592,9.32 20.299,10.26 20.793,11.78 19.5,10.84 18.207,11.78 18.701,10.26 17.408,9.32 19.006,9.32" fill="#fff" />
+    </svg>
+  );
+}
+
 /** Ukraine – Blue, Yellow horizontal */
 export function FlagUA(props: FlagProps) {
   return (
@@ -179,6 +204,7 @@ export const flagComponents: Record<string, (props: FlagProps) => ReactElement>
   pl: FlagPL,
   pt: FlagBR,
   ru: FlagRU,
+  tr: FlagTR,
   uk: FlagUA,
   zh: FlagCN,
 };

components/ui/language-switcher.tsx

@@ -8,6 +8,7 @@ import { cn } from '@/lib/utils';
 import { flagComponents } from './flag-icons';
 
 const languages = [
+  { value: 'cs', label: 'Česky' },
   { value: 'en', label: 'English' },
   { value: 'fr', label: 'Français' },
   { value: 'ja', label: '日本語' },
@@ -20,6 +21,7 @@ const languages = [
   { value: 'pl', label: 'Polski' },
   { value: 'pt', label: 'Português' },
   { value: 'ru', label: 'Русский' },
+  { value: 'tr', label: 'Türkçe' },
   { value: 'uk', label: 'Українська' },
   { value: 'zh', label: '简体中文' },
 ];

components/ui/prompt-dialog.tsx

@@ -0,0 +1,126 @@
+"use client";
+
+import { useEffect, useId, useRef, useState } from "react";
+import { useFocusTrap } from "@/hooks/use-focus-trap";
+import { useTranslations } from "next-intl";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+
+interface PromptDialogProps {
+  isOpen: boolean;
+  onClose: () => void;
+  onSubmit: (value: string) => void;
+  title: string;
+  message?: string;
+  placeholder?: string;
+  defaultValue?: string;
+  confirmText?: string;
+  cancelText?: string;
+}
+
+export function PromptDialog({
+  isOpen,
+  onClose,
+  onSubmit,
+  title,
+  message,
+  placeholder,
+  defaultValue = "",
+  confirmText,
+  cancelText,
+}: PromptDialogProps) {
+  const t = useTranslations("confirm_dialog");
+  const id = useId();
+  const [value, setValue] = useState(defaultValue);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  const dialogRef = useFocusTrap({
+    isActive: isOpen,
+    onEscape: onClose,
+    restoreFocus: true,
+  });
+
+  useEffect(() => {
+    if (isOpen) {
+      setValue(defaultValue);
+      const t = setTimeout(() => {
+        inputRef.current?.focus();
+        inputRef.current?.select();
+      }, 50);
+      return () => clearTimeout(t);
+    }
+  }, [isOpen, defaultValue]);
+
+  useEffect(() => {
+    if (!isOpen) return;
+
+    const handleBackdropClick = (e: MouseEvent) => {
+      if (dialogRef.current && !dialogRef.current.contains(e.target as Node)) {
+        onClose();
+      }
+    };
+
+    document.addEventListener("mousedown", handleBackdropClick);
+    return () => document.removeEventListener("mousedown", handleBackdropClick);
+  }, [isOpen, onClose, dialogRef]);
+
+  if (!isOpen) return null;
+
+  const resolvedConfirmText = confirmText || t("confirm");
+  const resolvedCancelText = cancelText || t("cancel");
+  const trimmed = value.trim();
+  const canSubmit = trimmed.length > 0;
+
+  const handleSubmit = (e?: React.FormEvent) => {
+    e?.preventDefault();
+    if (!canSubmit) return;
+    try {
+      onSubmit(trimmed);
+    } finally {
+      onClose();
+    }
+  };
+
+  return (
+    <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">
+      <div
+        ref={dialogRef}
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby={`${id}-title`}
+        className="bg-background border border-border rounded-lg shadow-xl w-full max-w-md animate-in zoom-in-95 duration-200"
+      >
+        <form onSubmit={handleSubmit}>
+          <div className="p-6">
+            <h2
+              id={`${id}-title`}
+              className="text-lg font-semibold text-foreground"
+            >
+              {title}
+            </h2>
+            {message && (
+              <p className="mt-2 text-sm text-muted-foreground">{message}</p>
+            )}
+            <Input
+              ref={inputRef}
+              type="text"
+              value={value}
+              onChange={(e) => setValue(e.target.value)}
+              placeholder={placeholder}
+              className="mt-4"
+            />
+          </div>
+
+          <div className="flex items-center justify-end gap-3 px-6 pb-6">
+            <Button type="button" variant="outline" onClick={onClose}>
+              {resolvedCancelText}
+            </Button>
+            <Button type="submit" variant="default" disabled={!canSubmit}>
+              {resolvedConfirmText}
+            </Button>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}

docker-compose.yml

@@ -8,6 +8,14 @@ services:
       - PORT=3000
     env_file:
       - .env.local
+    volumes:
+      # Encrypted user settings (SETTINGS_DATA_DIR).
+      - bulwark-settings:/app/data/settings
+      # Admin dashboard state: config, password hash, plugins, audit logs (ADMIN_DATA_DIR).
+      - bulwark-admin:/app/data/admin
+      # Anonymous telemetry: instance id, consent state, login HMACs (TELEMETRY_DATA_DIR).
+      # Persisting this preserves the admin's consent choice and stable instance id across upgrades.
+      - bulwark-telemetry:/app/data/telemetry
     healthcheck:
       test:
         [
@@ -23,3 +31,8 @@ services:
       retries: 3
       start_period: 10s
     restart: unless-stopped
+
+volumes:
+  bulwark-settings:
+  bulwark-admin:
+  bulwark-telemetry:

hooks/use-format-event-date.ts

@@ -0,0 +1,27 @@
+import { useCallback } from "react";
+import { useTranslations } from "next-intl";
+import { format } from "date-fns";
+
+/**
+ * Returns a memoized function that formats a calendar event date
+ * using the current locale for day and month names.
+ * 
+ * The string will be in the format: "EEE, MMM d, yyyy"
+ * 
+ * For example: "Wed, Apr 29, 2026" (en)
+ *              "Qua, Abr 29, 2026" (pt)
+ */
+export function useFormatEventDate(): (date: Date) => string {
+  const t = useTranslations("calendar");
+
+  return useCallback(
+    (date: Date): string => {
+      const dayOfWeek = format(date, "EEE").toLowerCase();
+      const month = format(date, "MMM").toLowerCase();
+      const day = format(date, "d");
+      const year = format(date, "yyyy");
+      return `${t(`days.${dayOfWeek}`)}, ${t(`months.${month}`)} ${day}, ${year}`;
+    },
+    [t]
+  );
+}

hooks/use-keyboard-shortcuts.ts

@@ -39,6 +39,7 @@ export interface UseKeyboardShortcutsOptions {
   enabled?: boolean;
   emails: Email[];
   selectedEmailId?: string;
+  selectionCount?: number;
   handlers: KeyboardShortcutHandlers;
 }
 
@@ -58,6 +59,7 @@ export function useKeyboardShortcuts({
   enabled = true,
   emails,
   selectedEmailId,
+  selectionCount = 0,
   handlers,
 }: UseKeyboardShortcutsOptions) {
   const handlersRef = useRef(handlers);
@@ -90,6 +92,8 @@ export function useKeyboardShortcuts({
       // Shortcuts that should NOT work with modifiers
       if (hasModifier) return;
 
+      const hasBatchTarget = !!selectedEmailId || selectionCount > 0;
+
       switch (key) {
         // Navigation
         case "j":
@@ -152,7 +156,7 @@ export function useKeyboardShortcuts({
           break;
 
         case "e":
-          if (selectedEmailId) {
+          if (hasBatchTarget) {
             event.preventDefault();
             h.onArchive?.();
           }
@@ -161,28 +165,28 @@ export function useKeyboardShortcuts({
         case "#":
         case "delete":
         case "backspace":
-          if (selectedEmailId && (key === "#" || key === "delete" || key === "backspace")) {
+          if (hasBatchTarget) {
             event.preventDefault();
             h.onDelete?.();
           }
           break;
 
         case "u":
-          if (selectedEmailId) {
+          if (hasBatchTarget) {
             event.preventDefault();
             h.onMarkAsUnread?.();
           }
           break;
 
         case "i":
-          if (selectedEmailId && event.shiftKey) {
+          if (hasBatchTarget && event.shiftKey) {
             event.preventDefault();
             h.onMarkAsRead?.();
           }
           break;
 
         case "!":
-          if (selectedEmailId) {
+          if (hasBatchTarget) {
             event.preventDefault();
             h.onToggleSpam?.();
           }
@@ -220,7 +224,7 @@ export function useKeyboardShortcuts({
           break;
       }
     },
-    [selectedEmailId]
+    [selectedEmailId, selectionCount]
   );
 
   useEffect(() => {

hooks/use-mailbox-drop.ts

@@ -6,6 +6,7 @@ import { useEmailStore } from "@/stores/email-store";
 import { useAuthStore } from "@/stores/auth-store";
 import { useDragDropContext } from "@/contexts/drag-drop-context";
 import { toast } from "@/stores/toast-store";
+import { getMailboxPath } from "@/lib/utils";
 
 interface UseMailboxDropOptions {
   mailbox: Mailbox;
@@ -30,7 +31,7 @@ interface UseMailboxDropReturn {
 export function useMailboxDrop({ mailbox, onDropComplete, onSuccess, onError }: UseMailboxDropOptions): UseMailboxDropReturn {
   const [isOver, setIsOver] = useState(false);
   const { client } = useAuthStore();
-  const { moveToMailbox, selectedEmailIds, clearSelection, fetchEmails, selectedMailbox } = useEmailStore();
+  const { moveEmailsToMailbox, selectedEmailIds, clearSelection, refreshCurrentMailbox, mailboxes } = useEmailStore();
   const { isDragging, sourceMailboxId, draggedEmails, endDrag } = useDragDropContext();
 
   // Determine if this is a valid drop target
@@ -106,31 +107,26 @@ export function useMailboxDrop({ mailbox, onDropComplete, onSuccess, onError }:
 
       const emailIds: string[] = JSON.parse(emailIdsJson);
 
-      // Get the destination mailbox ID (use originalId for shared folders)
-      const destinationId = mailbox.originalId || mailbox.id;
-
-      // Move emails one by one (store handles counter updates)
-      for (const emailId of emailIds) {
-        await moveToMailbox(client, emailId, destinationId);
-      }
+      // Move in a single bulk JMAP request (store handles counter updates).
+      await moveEmailsToMailbox(client, emailIds, mailbox.id);
 
       // Clear selection if any selected emails were moved
       if (emailIds.some(id => selectedEmailIds.has(id))) {
         clearSelection();
       }
 
-      // Refresh the current mailbox view
-      await fetchEmails(client, selectedMailbox);
+      // Refresh the current mailbox view (honors active search/filters)
+      await refreshCurrentMailbox(client);
+
+      const mailboxPath = getMailboxPath(mailbox, mailboxes);
 
-      // Call success callback if provided, otherwise use fallback
       if (onSuccess) {
-        onSuccess(emailIds.length, mailbox.name);
+        onSuccess(emailIds.length, mailboxPath);
       } else {
-        // Fallback for backward compatibility
         if (emailIds.length === 1) {
-          toast.success("Email moved", `Moved to ${mailbox.name}`);
+          toast.success("Email moved", `Moved to ${mailboxPath}`);
         } else {
-          toast.success("Emails moved", `${emailIds.length} emails moved to ${mailbox.name}`);
+          toast.success("Emails moved", `${emailIds.length} emails moved to ${mailboxPath}`);
         }
       }
 
@@ -148,7 +144,7 @@ export function useMailboxDrop({ mailbox, onDropComplete, onSuccess, onError }:
     } finally {
       endDrag();
     }
-  }, [client, mailbox, isValidTarget, moveToMailbox, selectedEmailIds, clearSelection, fetchEmails, selectedMailbox, endDrag, onDropComplete, onSuccess, onError]);
+  }, [client, mailbox, mailboxes, isValidTarget, moveEmailsToMailbox, selectedEmailIds, clearSelection, refreshCurrentMailbox, endDrag, onDropComplete, onSuccess, onError]);
 
   const valid = isValidTarget();
 

hooks/use-media-query.ts

@@ -1,6 +1,6 @@
 "use client";
 
-import { useState, useEffect } from "react";
+import { useCallback, useEffect, useSyncExternalStore } from "react";
 import { useUIStore } from "@/stores/ui-store";
 
 // Tailwind v4 breakpoints
@@ -12,26 +12,30 @@ const BREAKPOINTS = {
   "2xl": 1536,
 } as const;
 
+const getMediaQueryServerSnapshot = () => false;
+
 /**
- * SSR-safe media query hook
- * Returns false during SSR to prevent hydration mismatch
+ * SSR-safe media query hook. On SSR and the first hydration pass we report
+ * `false`; on all subsequent client renders (including client-side navigation
+ * remounts) we read `matchMedia` synchronously, so components don't flash
+ * through a one-frame "mobile" layout on desktop.
  */
 export function useMediaQuery(query: string): boolean {
-  const [matches, setMatches] = useState(false);
+  const subscribe = useCallback(
+    (callback: () => void) => {
+      const mq = window.matchMedia(query);
+      mq.addEventListener("change", callback);
+      return () => mq.removeEventListener("change", callback);
+    },
+    [query],
+  );
 
-  useEffect(() => {
-    const mediaQuery = window.matchMedia(query);
-    setMatches(mediaQuery.matches);
+  const getSnapshot = useCallback(
+    () => window.matchMedia(query).matches,
+    [query],
+  );
 
-    const handler = (event: MediaQueryListEvent) => {
-      setMatches(event.matches);
-    };
-
-    mediaQuery.addEventListener("change", handler);
-    return () => mediaQuery.removeEventListener("change", handler);
-  }, [query]);
-
-  return matches;
+  return useSyncExternalStore(subscribe, getSnapshot, getMediaQueryServerSnapshot);
 }
 
 /**

hooks/use-prompt-dialog.ts

@@ -0,0 +1,87 @@
+import { useState, useCallback, useRef, useEffect } from "react";
+
+interface PromptDialogState {
+  isOpen: boolean;
+  title: string;
+  message?: string;
+  placeholder?: string;
+  defaultValue: string;
+  confirmText?: string;
+  cancelText?: string;
+  onSubmit: (value: string) => void;
+}
+
+const INITIAL_STATE: PromptDialogState = {
+  isOpen: false,
+  title: "",
+  defaultValue: "",
+  onSubmit: () => {},
+};
+
+interface PromptOptions {
+  title: string;
+  message?: string;
+  placeholder?: string;
+  defaultValue?: string;
+  confirmText?: string;
+  cancelText?: string;
+}
+
+export function usePromptDialog() {
+  const [state, setState] = useState<PromptDialogState>(INITIAL_STATE);
+  const resolveRef = useRef<((value: string | null) => void) | null>(null);
+
+  useEffect(() => {
+    return () => {
+      if (resolveRef.current) {
+        resolveRef.current(null);
+        resolveRef.current = null;
+      }
+    };
+  }, []);
+
+  const prompt = useCallback(
+    (options: PromptOptions): Promise<string | null> => {
+      return new Promise((resolve) => {
+        resolveRef.current = resolve;
+        setState({
+          isOpen: true,
+          title: options.title,
+          message: options.message,
+          placeholder: options.placeholder,
+          defaultValue: options.defaultValue ?? "",
+          confirmText: options.confirmText,
+          cancelText: options.cancelText,
+          onSubmit: (value) => {
+            resolveRef.current = null;
+            resolve(value);
+          },
+        });
+      });
+    },
+    []
+  );
+
+  const close = useCallback(() => {
+    if (resolveRef.current) {
+      resolveRef.current(null);
+      resolveRef.current = null;
+    }
+    setState(INITIAL_STATE);
+  }, []);
+
+  return {
+    dialogProps: {
+      isOpen: state.isOpen,
+      onClose: close,
+      onSubmit: state.onSubmit,
+      title: state.title,
+      message: state.message,
+      placeholder: state.placeholder,
+      defaultValue: state.defaultValue,
+      confirmText: state.confirmText,
+      cancelText: state.cancelText,
+    },
+    prompt,
+  };
+}

hooks/use-time-grid-interactions.ts

@@ -1,9 +1,10 @@
 import { useState, useCallback, useRef, type PointerEvent, type DragEvent } from "react";
-import { format } from "date-fns";
+import { format, parseISO } from "date-fns";
 import { useAuthStore } from "@/stores/auth-store";
 import { useCalendarStore } from "@/stores/calendar-store";
 import { toast } from "@/stores/toast-store";
 import { debug } from "@/lib/debug";
+import { formatIsoInTimeZone } from "@/lib/calendar-utils";
 import type { Calendar } from "@/lib/jmap/types";
 
 interface DragCreateState {
@@ -12,9 +13,13 @@ interface DragCreateState {
   endMinutes: number;
 }
 
+export type ResizeEdge = "top" | "bottom";
+
 interface ResizeState {
   eventId: string;
+  topPx: number;
   heightPx: number;
+  startMinutes: number;
   durationMinutes: number;
 }
 
@@ -40,6 +45,7 @@ interface UseTimeGridInteractionsOptions {
     created: string;
     error: string;
   };
+  isMobile?: boolean;
 }
 
 export function useTimeGridInteractions({
@@ -47,6 +53,7 @@ export function useTimeGridInteractions({
   calendars,
   onCreateRange,
   errorMessages,
+  isMobile,
 }: UseTimeGridInteractionsOptions) {
   const snapToMinutes = useCallback((clientY: number, containerTop: number): number => {
     const raw = ((clientY - containerTop) / hourHeight) * 60;
@@ -72,6 +79,8 @@ export function useTimeGridInteractions({
     dayKey: string,
     dayDate: Date,
   ) => {
+    if (isMobile) return;
+    if (e.pointerType === "touch") return;
     if (e.button !== 0) return;
     if ((e.target as HTMLElement).closest("[data-calendar-event], [data-resize-handle]")) return;
 
@@ -82,7 +91,7 @@ export function useTimeGridInteractions({
       dayKey, dayDate, startMinutes: minutes,
       pointerId: e.pointerId, startY: e.clientY, captured: false,
     };
-  }, [snapToMinutes]);
+  }, [snapToMinutes, isMobile]);
 
   const handleGridPointerMove = useCallback((e: PointerEvent<HTMLDivElement>) => {
     if (!dragRef.current) return;
@@ -130,43 +139,65 @@ export function useTimeGridInteractions({
   // --- Resize ---
   const resizeRef = useRef<{
     eventId: string;
+    edge: ResizeEdge;
     startY: number;
+    originalStartMinutes: number;
     originalDurationMinutes: number;
-    originalHeightPx: number;
     pointerId: number;
   } | null>(null);
 
   const [resizeVisual, setResizeVisual] = useState<ResizeState | null>(null);
 
+  const computeResize = useCallback((
+    ref: NonNullable<typeof resizeRef.current>,
+    clientY: number,
+  ): { startMinutes: number; durationMinutes: number } => {
+    const deltaY = clientY - ref.startY;
+    const deltaMinutes = Math.round((deltaY / hourHeight) * 60 / 15) * 15;
+    const originalEnd = ref.originalStartMinutes + ref.originalDurationMinutes;
+
+    if (ref.edge === "bottom") {
+      const newDuration = Math.max(15, ref.originalDurationMinutes + deltaMinutes);
+      return { startMinutes: ref.originalStartMinutes, durationMinutes: newDuration };
+    }
+    // Top edge: move start, keep end fixed. Clamp so duration stays >= 15 and start >= 0.
+    let newStart = ref.originalStartMinutes + deltaMinutes;
+    newStart = Math.max(0, Math.min(originalEnd - 15, newStart));
+    return { startMinutes: newStart, durationMinutes: originalEnd - newStart };
+  }, [hourHeight]);
+
   const handleResizePointerDown = useCallback((
     eventId: string,
+    edge: ResizeEdge,
+    originalStartMinutes: number,
     originalDurationMinutes: number,
     e: PointerEvent,
   ) => {
     e.stopPropagation();
     e.preventDefault();
 
-    const originalHeightPx = Math.max(20, (originalDurationMinutes / 60) * hourHeight);
     resizeRef.current = {
       eventId,
+      edge,
       startY: e.clientY,
+      originalStartMinutes,
       originalDurationMinutes,
-      originalHeightPx,
       pointerId: e.pointerId,
     };
     (e.target as HTMLElement).setPointerCapture(e.pointerId);
-  }, [hourHeight]);
+  }, []);
 
   const handleResizePointerMove = useCallback((e: PointerEvent) => {
     if (!resizeRef.current) return;
-
-    const deltaY = e.clientY - resizeRef.current.startY;
-    const newHeightPx = Math.max(hourHeight / 4, resizeRef.current.originalHeightPx + deltaY);
-    const newDurationMinutes = Math.max(15, Math.round((newHeightPx / hourHeight) * 60 / 15) * 15);
-    const snappedHeight = (newDurationMinutes / 60) * hourHeight;
-
-    setResizeVisual({ eventId: resizeRef.current.eventId, heightPx: snappedHeight, durationMinutes: newDurationMinutes });
-  }, [hourHeight]);
+    const { startMinutes, durationMinutes } = computeResize(resizeRef.current, e.clientY);
+    setResizeVisual({
+      eventId: resizeRef.current.eventId,
+      topPx: (startMinutes / 60) * hourHeight,
+      heightPx: (durationMinutes / 60) * hourHeight,
+      startMinutes,
+      durationMinutes,
+    });
+  }, [hourHeight, computeResize]);
 
   const handleResizePointerUp = useCallback(async (e: PointerEvent) => {
     const resize = resizeRef.current;
@@ -179,11 +210,11 @@ export function useTimeGridInteractions({
 
     try { (e.target as HTMLElement).releasePointerCapture(resize.pointerId); } catch { /* may already be released */ }
 
-    const deltaY = e.clientY - resize.startY;
-    const newHeightPx = Math.max(hourHeight / 4, resize.originalHeightPx + deltaY);
-    const newDurationMinutes = Math.max(15, Math.round((newHeightPx / hourHeight) * 60 / 15) * 15);
+    const { startMinutes: newStartMinutes, durationMinutes: newDurationMinutes } = computeResize(resize, e.clientY);
 
-    if (newDurationMinutes === resize.originalDurationMinutes) {
+    const startChanged = newStartMinutes !== resize.originalStartMinutes;
+    const durationChanged = newDurationMinutes !== resize.originalDurationMinutes;
+    if (!startChanged && !durationChanged) {
       setResizeVisual(null);
       return;
     }
@@ -205,14 +236,21 @@ export function useTimeGridInteractions({
     try {
       const event = useCalendarStore.getState().events.find(ev => ev.id === resize.eventId);
       const hasParticipants = event?.participants && Object.keys(event.participants).length > 0;
-      await useCalendarStore.getState().updateEvent(client, resize.eventId, { duration: dur }, hasParticipants || undefined);
+      const updates: { start?: string; duration: string } = { duration: dur };
+      if (startChanged && event?.start) {
+        // Shift the event's floating `start` wall-clock by the delta (preserves event.timeZone).
+        const deltaMinutes = newStartMinutes - resize.originalStartMinutes;
+        const shifted = new Date(parseISO(event.start).getTime() + deltaMinutes * 60000);
+        updates.start = format(shifted, "yyyy-MM-dd'T'HH:mm:ss");
+      }
+      await useCalendarStore.getState().updateEvent(client, resize.eventId, updates, hasParticipants || undefined);
     } catch (error) {
       debug.error("Failed to resize event:", resize.eventId, error);
       toast.error(errorMessages.resize);
     } finally {
       setResizeVisual(null);
     }
-  }, [hourHeight, errorMessages.resize]);
+  }, [computeResize, errorMessages.resize]);
 
   // --- Click / Double-click / Quick-create ---
   const clickTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
@@ -317,14 +355,18 @@ export function useTimeGridInteractions({
       const minutes = snapDragMinutes(e);
       const newStart = new Date(day);
       newStart.setHours(Math.floor(minutes / 60), minutes % 60, 0, 0);
-      const newStartISO = format(newStart, "yyyy-MM-dd'T'HH:mm:ss");
+      const event = useCalendarStore.getState().events.find(ev => ev.id === data.eventId);
+      // Emit `start` as a floating wall-clock in the event's own timeZone.
+      // If we used browser-local, the server would reinterpret it in event.timeZone
+      // and shift the event by the offset between the two zones.
+      const eventTimeZone = event?.timeZone || Intl.DateTimeFormat().resolvedOptions().timeZone;
+      const newStartISO = formatIsoInTimeZone(newStart, eventTimeZone);
       if (newStartISO === data.originalStart) return;
       const client = useAuthStore.getState().client;
       if (!client) {
         toast.error(errorMessages.move);
         return;
       }
-      const event = useCalendarStore.getState().events.find(ev => ev.id === data.eventId);
       const hasParticipants = event?.participants && Object.keys(event.participants).length > 0;
       await useCalendarStore.getState().updateEvent(client, data.eventId, { start: newStartISO }, hasParticipants || undefined);
     } catch {

i18n/request.ts

@@ -11,6 +11,9 @@ export default getRequestConfig(async ({ requestLocale }) => {
   // Use static imports for better compatibility
   let messages;
   switch (locale) {
+    case 'cs':
+      messages = (await import('../locales/cs/common.json')).default;
+      break;
     case 'fr':
       messages = (await import('../locales/fr/common.json')).default;
       break;
@@ -44,6 +47,9 @@ export default getRequestConfig(async ({ requestLocale }) => {
     case 'ru':
       messages = (await import('../locales/ru/common.json')).default;
       break;
+    case 'tr':
+      messages = (await import('../locales/tr/common.json')).default;
+      break;
     case 'uk':
       messages = (await import('../locales/uk/common.json')).default;
       break;

i18n/routing.ts

@@ -13,7 +13,7 @@ const localePrefix = (process.env.NEXT_PUBLIC_LOCALE_PREFIX ?? 'never') as
   | 'as-needed';
 
 export const routing = defineRouting({
-  locales: ['en', 'fr', 'de', 'es', 'it', 'ja', 'ko', 'lv', 'nl', 'pl', 'pt', 'ru', 'uk', 'zh'],
+  locales: ['cs', 'en', 'fr', 'de', 'es', 'it', 'ja', 'ko', 'lv', 'nl', 'pl', 'pt', 'ru', 'tr', 'uk', 'zh'],
   defaultLocale: 'en',
   localePrefix
 });

instrumentation.node.ts

@@ -51,6 +51,14 @@ configManager.load()
   .then(() => {
     console.info("Admin dashboard initialized");
   })
+  .then(async () => {
+    // Anonymous telemetry - on by default. Admins can disable via the
+    // admin UI, the BULWARK_TELEMETRY env var, or by clearing the endpoint.
+    // See https://bulwarkmail.org/docs/legal/privacy/telemetry
+    const { startScheduler, markProcessStart } = await import("./lib/telemetry");
+    markProcessStart();
+    await startScheduler();
+  })
   .catch((err) => {
     console.warn("Admin dashboard init skipped:", err instanceof Error ? err.message : err);
   });

lib/__tests__/calendar-alerts.test.ts

@@ -82,7 +82,7 @@ function makeCalendar(overrides: Partial<Calendar> = {}): Calendar {
       mayWriteOwn: true,
       mayUpdatePrivate: true,
       mayRSVP: true,
-      mayAdmin: false,
+      mayShare: false,
       mayDelete: false,
     },
     ...overrides,

lib/__tests__/csp-frame-origins.test.ts

@@ -0,0 +1,104 @@
+import { describe, expect, it } from 'vitest';
+import {
+  isValidFrameOrigin,
+  sanitizeFrameOrigins,
+} from '@/lib/admin/csp-frame-origins';
+
+describe('isValidFrameOrigin', () => {
+  it('accepts plain https origins', () => {
+    expect(isValidFrameOrigin('https://www.youtube-nocookie.com')).toBe(true);
+    expect(isValidFrameOrigin('https://meet.example.com')).toBe(true);
+    expect(isValidFrameOrigin('https://a.b.c.example.com')).toBe(true);
+  });
+
+  it('accepts a wildcard subdomain', () => {
+    expect(isValidFrameOrigin('https://*.example.com')).toBe(true);
+    expect(isValidFrameOrigin('https://*.youtube.com')).toBe(true);
+  });
+
+  it('accepts an explicit port', () => {
+    expect(isValidFrameOrigin('https://meet.example.com:8443')).toBe(true);
+    expect(isValidFrameOrigin('https://*.example.com:443')).toBe(true);
+  });
+
+  it('rejects non-https schemes', () => {
+    expect(isValidFrameOrigin('http://example.com')).toBe(false);
+    expect(isValidFrameOrigin('ftp://example.com')).toBe(false);
+    expect(isValidFrameOrigin('data:text/html,foo')).toBe(false);
+    expect(isValidFrameOrigin('javascript:alert(1)')).toBe(false);
+  });
+
+  it('rejects bare schemes and wildcard hosts', () => {
+    expect(isValidFrameOrigin('https://')).toBe(false);
+    expect(isValidFrameOrigin('https://*')).toBe(false);
+    expect(isValidFrameOrigin('https://*.com')).toBe(false);
+    expect(isValidFrameOrigin('https://localhost')).toBe(false);
+  });
+
+  it('rejects paths, queries, and fragments', () => {
+    expect(isValidFrameOrigin('https://example.com/embed')).toBe(false);
+    expect(isValidFrameOrigin('https://example.com/')).toBe(false);
+    expect(isValidFrameOrigin('https://example.com?x=1')).toBe(false);
+    expect(isValidFrameOrigin('https://example.com#x')).toBe(false);
+  });
+
+  it('rejects userinfo, IPs, and IPv6', () => {
+    expect(isValidFrameOrigin('https://user:pass@example.com')).toBe(false);
+    expect(isValidFrameOrigin('https://1.2.3.4')).toBe(false);
+    expect(isValidFrameOrigin('https://[::1]')).toBe(false);
+  });
+
+  it('rejects values that try to break out of the directive', () => {
+    expect(isValidFrameOrigin("https://example.com'; script-src 'unsafe-eval")).toBe(false);
+    expect(isValidFrameOrigin('https://example.com" data:')).toBe(false);
+    expect(isValidFrameOrigin('https://example.com data:')).toBe(false);
+    expect(isValidFrameOrigin('https://example.com\nhttps://evil.com')).toBe(false);
+    expect(isValidFrameOrigin('https://example.com;https://evil.com')).toBe(false);
+    expect(isValidFrameOrigin('https://exa,mple.com')).toBe(false);
+  });
+
+  it('rejects non-strings and obvious garbage', () => {
+    expect(isValidFrameOrigin(undefined)).toBe(false);
+    expect(isValidFrameOrigin(null)).toBe(false);
+    expect(isValidFrameOrigin(42)).toBe(false);
+    expect(isValidFrameOrigin('')).toBe(false);
+    expect(isValidFrameOrigin('not-a-url')).toBe(false);
+    expect(isValidFrameOrigin('a'.repeat(300))).toBe(false);
+  });
+});
+
+describe('sanitizeFrameOrigins', () => {
+  it('returns empty for non-array input', () => {
+    expect(sanitizeFrameOrigins(undefined)).toEqual([]);
+    expect(sanitizeFrameOrigins(null)).toEqual([]);
+    expect(sanitizeFrameOrigins('https://example.com')).toEqual([]);
+    expect(sanitizeFrameOrigins({})).toEqual([]);
+  });
+
+  it('keeps valid entries and drops invalid ones silently', () => {
+    expect(
+      sanitizeFrameOrigins([
+        'https://www.youtube-nocookie.com',
+        'http://insecure.com',
+        'https://meet.example.com:8443',
+        'https://example.com/path',
+        42,
+        'https://*.vimeo.com',
+      ]),
+    ).toEqual([
+      'https://www.youtube-nocookie.com',
+      'https://meet.example.com:8443',
+      'https://*.vimeo.com',
+    ]);
+  });
+
+  it('dedupes case-insensitively', () => {
+    expect(
+      sanitizeFrameOrigins([
+        'https://Example.com',
+        'https://example.com',
+        'https://EXAMPLE.com',
+      ]),
+    ).toEqual(['https://Example.com']);
+  });
+});

lib/__tests__/email-threading.test.ts

@@ -0,0 +1,86 @@
+import { describe, it, expect } from 'vitest';
+import {
+  computeReplyThreadingHeaders,
+  stripMessageIdBrackets,
+} from '../email-threading';
+
+describe('stripMessageIdBrackets', () => {
+  it('strips surrounding angle brackets', () => {
+    expect(stripMessageIdBrackets('<abc@example.com>')).toBe('abc@example.com');
+  });
+
+  it('handles whitespace and missing brackets', () => {
+    expect(stripMessageIdBrackets('  abc@example.com  ')).toBe('abc@example.com');
+    expect(stripMessageIdBrackets('<abc@example.com')).toBe('abc@example.com');
+    expect(stripMessageIdBrackets('abc@example.com>')).toBe('abc@example.com');
+  });
+});
+
+describe('computeReplyThreadingHeaders', () => {
+  it('returns null when the parent has no Message-ID', () => {
+    expect(computeReplyThreadingHeaders(undefined)).toBeNull();
+    expect(computeReplyThreadingHeaders({})).toBeNull();
+    expect(computeReplyThreadingHeaders({ messageId: '' })).toBeNull();
+    expect(computeReplyThreadingHeaders({ messageId: '   ' })).toBeNull();
+  });
+
+  it('sets In-Reply-To to the parent Message-ID and seeds References with it', () => {
+    const result = computeReplyThreadingHeaders({
+      messageId: '<root@example.com>',
+    });
+    expect(result).toEqual({
+      inReplyTo: ['root@example.com'],
+      references: ['root@example.com'],
+    });
+  });
+
+  it('appends the parent to existing References per RFC 5322', () => {
+    const result = computeReplyThreadingHeaders({
+      messageId: '<msg-2@example.com>',
+      references: ['<msg-0@example.com>', '<msg-1@example.com>'],
+    });
+    expect(result).toEqual({
+      inReplyTo: ['msg-2@example.com'],
+      references: ['msg-0@example.com', 'msg-1@example.com', 'msg-2@example.com'],
+    });
+  });
+
+  it('de-duplicates if the parent already appears in References', () => {
+    const result = computeReplyThreadingHeaders({
+      messageId: '<msg-1@example.com>',
+      references: ['<msg-0@example.com>', '<msg-1@example.com>'],
+    });
+    expect(result?.references).toEqual([
+      'msg-0@example.com',
+      'msg-1@example.com',
+    ]);
+  });
+
+  it('accepts bare Message-IDs without angle brackets', () => {
+    const result = computeReplyThreadingHeaders({
+      messageId: 'msg-2@example.com',
+      references: ['msg-1@example.com'],
+    });
+    expect(result).toEqual({
+      inReplyTo: ['msg-2@example.com'],
+      references: ['msg-1@example.com', 'msg-2@example.com'],
+    });
+  });
+
+  // JMAP RFC 8621 §4.1.2.3 returns messageId as String[]|null. Verify we
+  // don't crash on that shape even though most call sites pass a string.
+  it('accepts an array-shaped messageId per JMAP spec', () => {
+    const result = computeReplyThreadingHeaders({
+      messageId: ['<msg-2@example.com>'],
+      references: ['<msg-1@example.com>'],
+    });
+    expect(result).toEqual({
+      inReplyTo: ['msg-2@example.com'],
+      references: ['msg-1@example.com', 'msg-2@example.com'],
+    });
+  });
+
+  it('returns null for an empty messageId array', () => {
+    expect(computeReplyThreadingHeaders({ messageId: [] })).toBeNull();
+  });
+});

lib/__tests__/jmap-send-threading.test.ts

@@ -0,0 +1,151 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { JMAPClient } from '../jmap/client';
+
+function createClient(): JMAPClient {
+  const client = new JMAPClient('https://jmap.example.com', 'user@example.com', 'pass');
+  Object.assign(client, {
+    apiUrl: 'https://jmap.example.com/api',
+    accountId: 'account-1',
+    username: 'user@example.com',
+  });
+  return client;
+}
+
+interface JMAPMethodCall {
+  0: string;
+  1: Record<string, unknown>;
+  2: string;
+}
+
+interface CapturedRequest {
+  using?: string[];
+  methodCalls: JMAPMethodCall[];
+}
+
+/**
+ * Mock fetch to script three sequential JMAP requests sendEmail makes:
+ * Mailbox/get → Identity/get → Email/set + EmailSubmission/set.
+ * Returns the captured request bodies for assertions.
+ */
+function mockSendEmailFlow() {
+  const captured: CapturedRequest[] = [];
+  const fetchSpy = vi.spyOn(globalThis, 'fetch');
+
+  fetchSpy.mockImplementation(async (_url, init) => {
+    const body = JSON.parse((init as { body: string }).body) as CapturedRequest;
+    captured.push(body);
+    const callIdx = captured.length - 1;
+
+    let payload: unknown;
+    if (callIdx === 0) {
+      payload = {
+        methodResponses: [[
+          'Mailbox/get',
+          {
+            list: [
+              { id: 'mb-drafts', name: 'Drafts', role: 'drafts' },
+              { id: 'mb-sent', name: 'Sent', role: 'sent' },
+            ],
+          },
+          '0',
+        ]],
+      };
+    } else if (callIdx === 1) {
+      payload = {
+        methodResponses: [[
+          'Identity/get',
+          { list: [{ id: 'identity-1', email: 'user@example.com', mayDelete: false }] },
+          '0',
+        ]],
+      };
+    } else {
+      payload = {
+        methodResponses: [
+          ['Email/set', { created: { [Object.keys((captured[callIdx].methodCalls[0][1] as { create: Record<string, unknown> }).create)[0]]: { id: 'sent-id-1' } } }, '0'],
+          ['EmailSubmission/set', { created: { '1': { id: 'sub-1' } } }, '1'],
+        ],
+      };
+    }
+
+    return {
+      ok: true,
+      status: 200,
+      text: () => Promise.resolve(JSON.stringify(payload)),
+      json: () => Promise.resolve(payload),
+    } as Response;
+  });
+
+  return captured;
+}
+
+describe('JMAPClient.sendEmail threading headers', () => {
+  beforeEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it('writes inReplyTo and references on the Email/set create when supplied', async () => {
+    const client = createClient();
+    const captured = mockSendEmailFlow();
+
+    await client.sendEmail(
+      ['recipient@example.com'],
+      'Re: testmail',
+      'reply body',
+      undefined, undefined, 'identity-1', 'user@example.com',
+      undefined, undefined, undefined, undefined,
+      ['<parent@example.com>'],
+      ['<root@example.com>', '<parent@example.com>'],
+    );
+
+    // Third request is the Email/set + EmailSubmission/set batch.
+    const setCall = captured[2].methodCalls[0];
+    expect(setCall[0]).toBe('Email/set');
+    const create = setCall[1].create as Record<string, Record<string, unknown>>;
+    const draft = Object.values(create)[0];
+
+    // Bare msg-ids per RFC 8621 — angle brackets stripped.
+    expect(draft.inReplyTo).toEqual(['parent@example.com']);
+    expect(draft.references).toEqual(['root@example.com', 'parent@example.com']);
+  });
+
+  it('omits threading fields when no parent ids are supplied', async () => {
+    const client = createClient();
+    const captured = mockSendEmailFlow();
+
+    await client.sendEmail(
+      ['recipient@example.com'],
+      'Fresh thread',
+      'body',
+      undefined, undefined, 'identity-1', 'user@example.com',
+    );
+
+    const setCall = captured[2].methodCalls[0];
+    const create = setCall[1].create as Record<string, Record<string, unknown>>;
+    const draft = Object.values(create)[0];
+
+    expect(draft.inReplyTo).toBeUndefined();
+    expect(draft.references).toBeUndefined();
+  });
+
+  it('drops empty / whitespace-only ids rather than sending blank entries', async () => {
+    const client = createClient();
+    const captured = mockSendEmailFlow();
+
+    await client.sendEmail(
+      ['recipient@example.com'],
+      'Re: testmail',
+      'body',
+      undefined, undefined, 'identity-1', 'user@example.com',
+      undefined, undefined, undefined, undefined,
+      ['<>', '   ', '<real@example.com>'],
+      [],
+    );
+
+    const setCall = captured[2].methodCalls[0];
+    const create = setCall[1].create as Record<string, Record<string, unknown>>;
+    const draft = Object.values(create)[0];
+
+    expect(draft.inReplyTo).toEqual(['real@example.com']);
+    expect(draft.references).toBeUndefined();
+  });
+});

lib/__tests__/plugin-store.test.ts

@@ -47,6 +47,8 @@ function resetStore() {
       'email-banner': [],
       'email-footer': [],
       'composer-toolbar': [],
+      'composer-sidebar': [],
+      'composer-sidebar-right': [],
       'sidebar-widget': [],
       'email-detail-sidebar': [],
       'settings-section': [],

lib/__tests__/plugin-validator.test.ts

@@ -28,23 +28,11 @@ describe('extractTheme', () => {
   });
 
   it('rejects oversized theme', async () => {
-    const zip = new JSZip();
-    zip.file('manifest.json', JSON.stringify({
-      id: 'big-theme',
-      name: 'Big',
-      version: '1.0.0',
-      author: 'Test',
-      type: 'theme',
-      variants: ['light'],
-    }));
-    // Make a large file > 1MB
-    zip.file('theme.css', 'x'.repeat(1024 * 1024 + 1));
-
-    // Manually create oversized File
-    const oversizedFile = new File([new ArrayBuffer(1024 * 1024 + 1)], 'big.zip');
+    // Theme size limit is 2 MB; create a file just past it.
+    const oversizedFile = new File([new ArrayBuffer(2 * 1024 * 1024 + 1)], 'big.zip');
     const result = await extractTheme(oversizedFile);
     expect(result.valid).toBe(false);
-    expect(result.errors).toContain('Theme ZIP exceeds 1 MB size limit');
+    expect(result.errors).toContain('Theme ZIP exceeds 2 MB size limit');
   });
 
   it('rejects non-ZIP file', async () => {
@@ -139,6 +127,129 @@ describe('extractTheme', () => {
     expect(result.valid).toBe(true);
     expect(result.manifest!.id).toBe('nested-theme');
   });
+
+  // ── Theme API v2 (advanced manifest) ──────────────────────────────
+
+  it('compiles a v2 manifest with tokens and no theme.css', async () => {
+    const zip = new JSZip();
+    zip.file('manifest.json', JSON.stringify({
+      id: 'tokens-only',
+      name: 'Tokens Only',
+      version: '1.0.0',
+      author: 'Test',
+      type: 'theme',
+      variants: ['light', 'dark'],
+      apiVersion: 2,
+      tokens: {
+        light: { primary: '#1373d9', background: '#ffffff' },
+        dark: { primary: '#58c9ff', background: '#1a202c' },
+      },
+    }));
+    const file = await createZipFile(zip);
+    const result = await extractTheme(file);
+    expect(result.valid).toBe(true);
+    expect(result.css).toContain('--color-primary: #1373d9');
+    expect(result.css).toContain('--color-primary: #58c9ff');
+  });
+
+  it('concatenates compiled tokens with author-supplied theme.css', async () => {
+    const zip = new JSZip();
+    zip.file('manifest.json', JSON.stringify({
+      id: 'tokens-plus-css',
+      name: 'Tokens + CSS',
+      version: '1.0.0',
+      author: 'Test',
+      type: 'theme',
+      variants: ['light'],
+      apiVersion: 2,
+      tokens: { light: { primary: '#000' } },
+    }));
+    zip.file('theme.css', '@font-face { font-family: "X"; src: local("X"); }');
+    const file = await createZipFile(zip);
+    const result = await extractTheme(file);
+    expect(result.valid).toBe(true);
+    expect(result.css).toContain('--color-primary: #000');
+    expect(result.css).toContain('@font-face');
+  });
+
+  it('extracts a skin.css when shipped with a v2 manifest', async () => {
+    const zip = new JSZip();
+    zip.file('manifest.json', JSON.stringify({
+      id: 'with-skin',
+      name: 'With Skin',
+      version: '1.0.0',
+      author: 'Test',
+      type: 'theme',
+      variants: ['light'],
+      apiVersion: 2,
+      tokens: { light: { primary: '#000' } },
+    }));
+    zip.file('skin.css', '[data-tour="email-list"] { font-size: 13px; }');
+    const file = await createZipFile(zip);
+    const result = await extractTheme(file);
+    expect(result.valid).toBe(true);
+    expect(result.skin).not.toBeNull();
+    expect(result.skin!).toContain('[data-tour="email-list"]');
+  });
+
+  it('strips dangerous patterns from skin.css', async () => {
+    const zip = new JSZip();
+    zip.file('manifest.json', JSON.stringify({
+      id: 'evil-skin',
+      name: 'Evil',
+      version: '1.0.0',
+      author: 'Test',
+      type: 'theme',
+      variants: ['light'],
+      apiVersion: 2,
+      tokens: { light: { primary: '#000' } },
+    }));
+    zip.file('skin.css', '@import url("https://x.com/p.css"); button { background: javascript:alert(1); }');
+    const file = await createZipFile(zip);
+    const result = await extractTheme(file);
+    expect(result.valid).toBe(true);
+    expect(result.skin).not.toBeNull();
+    expect(result.skin!).not.toContain('javascript:');
+    expect(result.skin!).not.toContain('@import');
+    expect(result.warnings.some((w) => w.toLowerCase().includes('skin'))).toBe(true);
+  });
+
+  it('ignores skin.css when manifest is not v2', async () => {
+    const zip = new JSZip();
+    zip.file('manifest.json', JSON.stringify({
+      id: 'v1-with-skin',
+      name: 'V1',
+      version: '1.0.0',
+      author: 'Test',
+      type: 'theme',
+      variants: ['light'],
+    }));
+    zip.file('theme.css', ':root { --color-primary: #000; }');
+    zip.file('skin.css', 'body { display: none; }');
+    const file = await createZipFile(zip);
+    const result = await extractTheme(file);
+    expect(result.valid).toBe(true);
+    expect(result.skin).toBeNull();
+    expect(result.warnings.some((w) => w.includes('skin.css ignored'))).toBe(true);
+  });
+
+  it('rejects a v2 manifest with invalid density', async () => {
+    const zip = new JSZip();
+    zip.file('manifest.json', JSON.stringify({
+      id: 'bad-density',
+      name: 'Bad',
+      version: '1.0.0',
+      author: 'Test',
+      type: 'theme',
+      variants: ['light'],
+      density: 'gigantic',
+      tokens: { light: { primary: '#000' } },
+    }));
+    const file = await createZipFile(zip);
+    const result = await extractTheme(file);
+    expect(result.valid).toBe(false);
+    expect(result.errors.some((e) => e.includes('density'))).toBe(true);
+  });
 });
 
 describe('extractPlugin', () => {

lib/__tests__/sub-addressing.test.ts

@@ -6,6 +6,10 @@ import {
   suggestTagsForDomain,
   isValidTag,
   getTagValidationError,
+  isSupportedSubAddressDelimiter,
+  isValidSubAddressDelimiter,
+  SUPPORTED_SUB_ADDRESS_DELIMITERS,
+  DEFAULT_SUB_ADDRESS_DELIMITER,
   MAX_TAG_LENGTH,
 } from '../sub-addressing';
 
@@ -354,3 +358,122 @@ describe('getTagValidationError', () => {
     expect(getTagValidationError('日本語')).toBe('INVALID_CHARS');
   });
 });
+
+describe('custom delimiter', () => {
+  describe('parseSubAddress with non-default delimiter', () => {
+    it('should parse with "-" delimiter', () => {
+      const result = parseSubAddress('user-shopping@example.com', '-');
+      expect(result.baseUser).toBe('user');
+      expect(result.tag).toBe('shopping');
+    });
+
+    it('should parse with "." delimiter', () => {
+      const result = parseSubAddress('user.shopping@example.com', '.');
+      expect(result.baseUser).toBe('user');
+      expect(result.tag).toBe('shopping');
+    });
+
+    it('should parse with "=" delimiter', () => {
+      const result = parseSubAddress('user=shopping@example.com', '=');
+      expect(result.baseUser).toBe('user');
+      expect(result.tag).toBe('shopping');
+    });
+
+    it('should ignore "+" when "-" is configured as the delimiter', () => {
+      const result = parseSubAddress('user+shopping@example.com', '-');
+      expect(result.baseUser).toBe('user+shopping');
+      expect(result.tag).toBeNull();
+    });
+
+    it('should split on first occurrence when delimiter appears multiple times', () => {
+      const result = parseSubAddress('alice-shop-orders@example.com', '-');
+      expect(result.baseUser).toBe('alice');
+      expect(result.tag).toBe('shop-orders');
+    });
+  });
+
+  describe('generateSubAddress with non-default delimiter', () => {
+    it('should generate using "-" delimiter', () => {
+      expect(generateSubAddress('user@example.com', 'shopping', '-')).toBe('user-shopping@example.com');
+    });
+
+    it('should generate using "." delimiter', () => {
+      expect(generateSubAddress('user@example.com', 'shopping', '.')).toBe('user.shopping@example.com');
+    });
+
+    it('should replace existing tag using the configured delimiter', () => {
+      expect(generateSubAddress('user-old@example.com', 'new', '-')).toBe('user-new@example.com');
+    });
+
+    it('should not strip a "+" sign in the local part when delimiter is "-"', () => {
+      // "+" is not the delimiter so it should remain part of the base user
+      expect(generateSubAddress('user+plus@example.com', 'tag', '-')).toBe('user+plus-tag@example.com');
+    });
+  });
+
+  describe('isSupportedSubAddressDelimiter', () => {
+    it('accepts every supported delimiter', () => {
+      for (const delim of SUPPORTED_SUB_ADDRESS_DELIMITERS) {
+        expect(isSupportedSubAddressDelimiter(delim)).toBe(true);
+      }
+    });
+
+    it('rejects unsupported characters', () => {
+      expect(isSupportedSubAddressDelimiter('_')).toBe(false);
+      expect(isSupportedSubAddressDelimiter('++')).toBe(false);
+      expect(isSupportedSubAddressDelimiter('')).toBe(false);
+    });
+
+    it('default delimiter is supported', () => {
+      expect(isSupportedSubAddressDelimiter(DEFAULT_SUB_ADDRESS_DELIMITER)).toBe(true);
+    });
+  });
+
+  describe('isValidSubAddressDelimiter', () => {
+    it('accepts every preset delimiter', () => {
+      for (const delim of SUPPORTED_SUB_ADDRESS_DELIMITERS) {
+        expect(isValidSubAddressDelimiter(delim)).toBe(true);
+      }
+    });
+
+    it('accepts atext special characters as custom delimiters', () => {
+      const customs = ['~', '!', '#', '$', '%', '&', "'", '*', '/', '?', '^', '_', '`', '{', '|', '}'];
+      for (const c of customs) {
+        expect(isValidSubAddressDelimiter(c)).toBe(true);
+      }
+    });
+
+    it('rejects alphanumeric characters', () => {
+      expect(isValidSubAddressDelimiter('a')).toBe(false);
+      expect(isValidSubAddressDelimiter('Z')).toBe(false);
+      expect(isValidSubAddressDelimiter('0')).toBe(false);
+    });
+
+    it('rejects "@", whitespace, and quotes', () => {
+      expect(isValidSubAddressDelimiter('@')).toBe(false);
+      expect(isValidSubAddressDelimiter(' ')).toBe(false);
+      expect(isValidSubAddressDelimiter('\t')).toBe(false);
+      expect(isValidSubAddressDelimiter('"')).toBe(false);
+    });
+
+    it('rejects multi-character strings', () => {
+      expect(isValidSubAddressDelimiter('++')).toBe(false);
+      expect(isValidSubAddressDelimiter('abc')).toBe(false);
+    });
+
+    it('rejects empty / non-string inputs', () => {
+      expect(isValidSubAddressDelimiter('')).toBe(false);
+      expect(isValidSubAddressDelimiter(null)).toBe(false);
+      expect(isValidSubAddressDelimiter(undefined)).toBe(false);
+      expect(isValidSubAddressDelimiter(1)).toBe(false);
+    });
+
+    it('round-trips through parse/generate with a custom "~" delimiter', () => {
+      const generated = generateSubAddress('user@example.com', 'shopping', '~');
+      expect(generated).toBe('user~shopping@example.com');
+      const parsed = parseSubAddress(generated, '~');
+      expect(parsed.baseUser).toBe('user');
+      expect(parsed.tag).toBe('shopping');
+    });
+  });
+});

lib/__tests__/theme-compiler.test.ts

@@ -0,0 +1,181 @@
+import { describe, it, expect } from 'vitest';
+import { compileAdvancedTheme, isAdvancedManifest } from '../theme-compiler';
+import type { ThemeManifest } from '../plugin-types';
+
+const baseManifest = (overrides: Partial<ThemeManifest> = {}): ThemeManifest => ({
+  id: 't',
+  name: 'T',
+  version: '1.0.0',
+  author: 'tester',
+  description: '',
+  type: 'theme',
+  variants: ['light', 'dark'],
+  ...overrides,
+});
+
+describe('isAdvancedManifest', () => {
+  it('returns false for plain v1 manifests', () => {
+    expect(isAdvancedManifest(baseManifest())).toBe(false);
+  });
+
+  it.each([
+    { apiVersion: 2 as const },
+    { tokens: { light: { primary: '#000' } } },
+    { extends: 'builtin-nord' },
+    { derive: true },
+    { density: 'compact' as const },
+    { radii: { md: '6px' } },
+    { typography: { fontSans: 'Inter' } },
+  ])('returns true when manifest has %p', (extra) => {
+    expect(isAdvancedManifest(baseManifest(extra))).toBe(true);
+  });
+});
+
+describe('compileAdvancedTheme', () => {
+  it('emits :root and .dark blocks from token sets', () => {
+    const { css, errors } = compileAdvancedTheme(
+      baseManifest({
+        tokens: {
+          light: { primary: '#1373d9', background: '#ffffff' },
+          dark: { primary: '#58c9ff', background: '#1a202c' },
+        },
+      }),
+    );
+    expect(errors).toHaveLength(0);
+    expect(css).toMatch(/:root\s*\{[\s\S]*--color-primary:\s*#1373d9/);
+    expect(css).toMatch(/\.dark\s*\{[\s\S]*--color-primary:\s*#58c9ff/);
+  });
+
+  it('omits .dark block for light-only themes', () => {
+    const { css } = compileAdvancedTheme(
+      baseManifest({
+        variants: ['light'],
+        tokens: { light: { primary: '#000' }, dark: { primary: '#fff' } },
+      }),
+    );
+    expect(css).toContain(':root');
+    expect(css).not.toContain('.dark');
+  });
+
+  it('emits common tokens into both :root and .dark', () => {
+    const { css } = compileAdvancedTheme(
+      baseManifest({
+        tokens: {
+          common: { ring: '#abc' },
+          light: { background: '#fff' },
+          dark: { background: '#000' },
+        },
+      }),
+    );
+    const rootMatch = css.match(/:root\s*\{([\s\S]*?)\}/)?.[1] ?? '';
+    const darkMatch = css.match(/\.dark\s*\{([\s\S]*?)\}/)?.[1] ?? '';
+    expect(rootMatch).toContain('--color-ring: #abc');
+    expect(darkMatch).toContain('--color-ring: #abc');
+  });
+
+  it('derives a contrasting *-foreground when derive: true', () => {
+    const { css } = compileAdvancedTheme(
+      baseManifest({
+        derive: true,
+        tokens: { light: { primary: '#000000' }, dark: { primary: '#ffffff' } },
+      }),
+    );
+    expect(css).toMatch(/:root\s*\{[\s\S]*--color-primary-foreground:\s*#ffffff/);
+    expect(css).toMatch(/\.dark\s*\{[\s\S]*--color-primary-foreground:\s*#0f172a/);
+  });
+
+  it('respects an author-provided *-foreground over derive', () => {
+    const { css } = compileAdvancedTheme(
+      baseManifest({
+        derive: true,
+        tokens: {
+          light: { primary: '#000000', 'primary-foreground': '#ff00ff' },
+        },
+      }),
+    );
+    expect(css).toContain('--color-primary-foreground: #ff00ff');
+  });
+
+  it('emits radii, typography, and density vars', () => {
+    const { css } = compileAdvancedTheme(
+      baseManifest({
+        tokens: { light: { primary: '#000' } },
+        radii: { sm: '2px', md: '6px', full: '9999px' },
+        typography: { fontSans: 'Inter, sans-serif', baseFontSize: '15px' },
+        density: 'compact',
+      }),
+    );
+    expect(css).toContain('--radius-sm: 2px');
+    expect(css).toContain('--radius-full: 9999px');
+    expect(css).toContain('--font-sans: Inter, sans-serif');
+    expect(css).toContain('--font-size-base: 15px');
+    expect(css).toContain('--density-row-height: 28px');
+  });
+
+  it('drops tokens with unsafe values and warns', () => {
+    const { css, warnings } = compileAdvancedTheme(
+      baseManifest({
+        tokens: {
+          light: {
+            primary: '#000',
+            evil: 'red; background: url("https://x.com/track.png")',
+          },
+        },
+      }),
+    );
+    expect(css).toContain('--color-primary: #000');
+    expect(css).not.toContain('https://x.com');
+    expect(warnings.some((w) => w.includes('evil'))).toBe(true);
+  });
+
+  it('drops tokens with unsafe keys and warns', () => {
+    const { css, warnings } = compileAdvancedTheme(
+      baseManifest({
+        tokens: { light: { 'primary }; body { background: red': '#fff', primary: '#000' } },
+      }),
+    );
+    expect(css).toContain('--color-primary: #000');
+    expect(css).not.toContain('body { background');
+    expect(warnings.some((w) => w.includes('invalid key'))).toBe(true);
+  });
+
+  it('errors when no structured fields are present', () => {
+    const { errors } = compileAdvancedTheme(baseManifest());
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('inlines parent CSS when extends + resolver supplied', () => {
+    const { css, warnings } = compileAdvancedTheme(
+      baseManifest({
+        extends: 'parent-theme',
+        tokens: { light: { primary: '#fff' } },
+      }),
+      { resolveExtends: (id) => (id === 'parent-theme' ? ':root { --x: 1; }' : null) },
+    );
+    expect(css).toContain('--x: 1');
+    expect(css).toContain('--color-primary: #fff');
+    expect(warnings).toHaveLength(0);
+  });
+
+  it('warns when extends parent cannot be resolved', () => {
+    const { warnings } = compileAdvancedTheme(
+      baseManifest({
+        extends: 'missing',
+        tokens: { light: { primary: '#fff' } },
+      }),
+      { resolveExtends: () => null },
+    );
+    expect(warnings.some((w) => w.includes('missing'))).toBe(true);
+  });
+
+  it('appends user-supplied CSS after compiled output', () => {
+    const { css } = compileAdvancedTheme(
+      baseManifest({ tokens: { light: { primary: '#fff' } } }),
+      { userCSS: '@font-face { font-family: "X"; src: local("X"); }' },
+    );
+    const compiledIdx = css.indexOf('--color-primary');
+    const userIdx = css.indexOf('@font-face');
+    expect(compiledIdx).toBeGreaterThanOrEqual(0);
+    expect(userIdx).toBeGreaterThan(compiledIdx);
+  });
+});