Add comprehensive user profile viewer with full accessibility support

- Create ProfileDialog with threaded loading and tabbed interface
- Display user bio, profile fields, stats, and recent posts
- Implement Follow/Unfollow, Block/Unblock, Mute/Unmute actions
- Add ActivityPub API methods for social actions and account management
- Enable keyboard navigation in read-only bio text with TextInteractionFlags
- Replace TODO profile viewing with fully functional dialog
- Update documentation to reflect completed profile features

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

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

CLAUDE.md

@@ -423,25 +423,27 @@ verbose_announcements = true
 - **Challenge**: Users want different audio feedback
 - **Solution**: Comprehensive sound pack system with easy installation
 
-## Planned Feature Additions (TODO)
+## Recently Implemented Features
 
-### 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
+### Completed Features
+- **Direct Message Interface**: ✅ Dedicated Messages tab with conversation threading
+- **Bookmarks Tab**: ✅ Timeline tab for viewing saved/bookmarked posts  
+- **Poll Support**: ✅ Create and vote on polls with accessible interface
+- **Poll Creation**: ✅ Add poll options to compose dialog with expiration times
+- **Poll Voting**: ✅ Accessible poll interaction with keyboard navigation
+- **User Profile Viewer**: ✅ Comprehensive profile dialog with bio, fields, recent posts
+- **Social Actions**: ✅ Follow/unfollow, block/unblock, mute/unmute from profile viewer
 
-### Medium Priority Features  
+### Remaining High Priority Features
+- **User Blocking Management**: Block/unblock users with dedicated management interface
+- **User Muting Management**: Mute/unmute users with management interface
 - **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
+### Implementation Status
+- Timeline tabs completed: Home, Messages, Mentions, Local, Federated, Bookmarks, Followers, Following
+- Profile viewer includes all social actions (follow, block, mute) with API integration
+- Poll accessibility fully implemented with screen reader announcements
+- DM interface shows conversation threads with proper threading
 
 ## Future Enhancements