Add comprehensive direct messaging and bookmarks system

- Add dedicated Messages timeline with conversation threading
- Implement bookmarks timeline for saved posts
- Support both standard ActivityPub conversations and Pleroma chats
- Auto-mark conversations as read when selected
- Full pagination support for messages and bookmarks
- Reorder timeline tabs for better UX (Messages now second tab)
- Remove verbose prefixes for cleaner accessibility
- Add conversation management API endpoints
- Maintain accessibility-first design with no text truncation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -355,12 +355,31 @@ verbose_announcements = true
 - **Challenge**: Users want different audio feedback
 - **Solution**: Comprehensive sound pack system with easy installation
 
+## Planned Feature Additions (TODO)
+
+### High Priority Missing Features
+- **Direct Message Interface**: Dedicated DM tab with conversation threading (separate from private posts)
+- **Bookmarks Tab**: Timeline tab for viewing saved/bookmarked posts  
+- **User Blocking**: Block/unblock users with management interface
+- **User Muting**: Mute/unmute users functionality
+- **Poll Support**: Create and vote on polls with accessible interface
+
+### Medium Priority Features  
+- **Blocked Users Management**: Tab/dialog to view and manage blocked users
+- **Poll Creation**: Add poll options to compose dialog
+- **Poll Voting**: Accessible poll interaction ("Poll: What's your favorite color? 3 options, press Enter to vote")
+
+### Implementation Notes
+- Models already have bookmark, muted, blocking fields - just need API integration
+- Timeline will need additional tabs: Home, Mentions, Local, Federated, DMs, Bookmarks
+- Poll accessibility: Announce poll in timeline, Enter to interact, arrow keys to navigate options
+- DM interface should show conversation threads rather than timeline format
+
 ## Future Enhancements
 
 ### Advanced Features
 - Custom timeline filters
-- Multiple column support
-- Direct message interface
+- Multiple column support  
 - List management
 - Advanced search