Update comprehensive documentation and complete feature implementation

- Updated README.md with all new features: media uploads, post details, thread expansion, blocked/muted management, custom emoji support
- Added detailed keyboard shortcuts documentation for all timeline tabs (Ctrl+1-0)
- Documented poll creation/voting accessibility features and media upload functionality
- Updated CLAUDE.md with complete implementation status and recent feature additions
- Added sound pack creation guide with security measures and installation methods
- Documented accessibility patterns including fake headers for single-item navigation
- Updated technology stack to include numpy dependency for audio processing
- Marked all high and medium priority todo items as completed
- Project now feature-complete with excellent accessibility support

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

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

README.md

@@ -27,6 +27,11 @@ This project was created through "vibe coding" - a collaborative development app
 - **Poll Support**: Create, vote in, and view results of fediverse polls with full accessibility
 - **User Profile Viewer**: Comprehensive profile viewing with bio, fields, recent posts, and social actions
 - **Social Features**: Follow/unfollow, block/unblock, and mute/unmute users directly from profiles
+- **Media Uploads**: Attach images, videos, and audio files with accessibility-compliant alt text
+- **Post Details**: Press Enter on any post to see detailed interaction information
+- **Thread Expansion**: Full conversation context fetching for complete thread viewing
+- **Blocked/Muted Management**: Dedicated tabs for managing blocked and muted users
+- **Custom Emoji Support**: Instance-specific emoji support with caching
 
 ## Audio System
 
@@ -50,6 +55,9 @@ Bifrost includes a sophisticated sound system with:
 - **Content Warnings**: Optional spoiler text support
 - **Visibility Controls**: Public, Unlisted, Followers-only, or Direct messages
 - **Poll Creation**: Add polls with up to 4 options, single or multiple choice, with expiration times
+- **Media Attachments**: Upload images, videos, and audio with server limit validation
+- **Alt Text Support**: Mandatory accessibility descriptions for uploaded media
+- **File Validation**: MIME type and size checking with user-friendly error messages
 
 ## Technology Stack
 
@@ -58,6 +66,7 @@ Bifrost includes a sophisticated sound system with:
 - **simpleaudio**: Cross-platform audio with subprocess fallback
 - **Plyer**: Cross-platform desktop notifications
 - **emoji**: Comprehensive Unicode emoji library (5,000+ emojis)
+- **numpy**: Audio processing for volume control and sound manipulation
 - **XDG Base Directory**: Standards-compliant configuration storage
 
 ## Keyboard Shortcuts
@@ -71,6 +80,8 @@ Bifrost includes a sophisticated sound system with:
 - **Ctrl+6**: Switch to Bookmarks timeline
 - **Ctrl+7**: Switch to Followers timeline
 - **Ctrl+8**: Switch to Following timeline
+- **Ctrl+9**: Switch to Blocked Users timeline
+- **Ctrl+0**: Switch to Muted Users timeline
 - **Ctrl+Tab**: Switch between timeline tabs
 - **F5**: Refresh current timeline
 
@@ -81,6 +92,8 @@ Bifrost includes a sophisticated sound system with:
 - **Ctrl+F**: Favorite selected post
 - **Ctrl+C**: Copy selected post to clipboard
 - **Ctrl+U**: Open URLs from selected post in browser
+- **Ctrl+Shift+B**: Block user who authored selected post
+- **Ctrl+Shift+M**: Mute user who authored selected post
 
 ### Navigation
 - **Arrow Keys**: Navigate through posts
@@ -89,7 +102,7 @@ Bifrost includes a sophisticated sound system with:
 - **Shift+Left Arrow**: Navigate to thread root from any reply
 - **Page Up/Down**: Jump multiple posts
 - **Home/End**: Go to first/last post
-- **Enter**: Expand/collapse threads, or vote in polls
+- **Enter**: Expand/collapse threads, vote in polls, or view post details
 - **Tab**: Move between interface elements
 
 ### Compose Dialog