Add comprehensive poll support with full accessibility

Features:
- Poll creation in compose dialog with up to 4 options, single/multiple choice, expiration times
- Accessible poll discovery with keyboard navigation (Enter to vote on polls in timeline)
- Poll voting dialog with radio buttons/checkboxes and proper focus management
- Poll results display using navigable list widget for accessibility
- Real-time poll validation and error handling
- Updated README with complete poll documentation

Technical improvements:
- Added poll endpoints to ActivityPub client (create_poll, vote_in_poll)
- Extended Post model with poll data fields and accessibility methods
- Enhanced timeline view with Enter key handling for poll interaction
- Simplified radio button implementation following doom launcher patterns
- Fixed undefined variable bug in poll info generation

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

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

README.md

@@ -24,6 +24,7 @@ This project was created through "vibe coding" - a collaborative development app
 - **Keyboard Navigation**: Complete keyboard control with intuitive shortcuts
 - **Direct Message Interface**: Dedicated conversation view with threading support
 - **Bookmarks**: Save and view bookmarked posts in a dedicated timeline
+- **Poll Support**: Create, vote in, and view results of fediverse polls with full accessibility
 
 ## Audio System
 
@@ -45,6 +46,7 @@ Bifrost includes a sophisticated sound system with:
 - **Real-time Character Count**: Visual feedback with limit warnings
 - **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
 
 ## Technology Stack
 
@@ -81,7 +83,7 @@ Bifrost includes a sophisticated sound system with:
 - **Arrow Keys**: Navigate through posts
 - **Page Up/Down**: Jump multiple posts
 - **Home/End**: Go to first/last post
-- **Enter**: Expand/collapse threads
+- **Enter**: Expand/collapse threads, or vote in polls
 - **Tab**: Move between interface elements
 
 ### Compose Dialog
@@ -113,6 +115,37 @@ sudo pacman -S python-pyside6 python-requests python-simpleaudio python-emoji
 yay -S python-plyer
 ```
 
+## Poll Features
+
+Bifrost includes comprehensive poll support with full accessibility:
+
+### Creating Polls
+- **In Compose Dialog**: Check "Add Poll" to create polls with your posts
+- **Up to 4 Options**: Add 2-4 poll options (minimum 2 required)
+- **Choice Types**: Single choice (radio buttons) or multiple choice (checkboxes)
+- **Expiration**: Set when the poll expires (1 hour to 30 days)
+- **Real-time Validation**: Get immediate feedback on poll requirements
+
+### Voting in Polls
+- **Accessible Discovery**: Polls announced as "Poll: X options, Y votes, press Enter to vote"
+- **Keyboard Voting**: Use Tab and arrow keys to navigate options, Space to select
+- **Radio Button Groups**: Single choice polls use accessible radio button navigation
+- **Checkbox Lists**: Multiple choice polls use standard checkbox interaction
+- **Vote Submission**: Submit votes with accessible button controls
+
+### Viewing Results
+- **Automatic Display**: Results shown immediately after voting or for expired polls
+- **Navigable List**: Vote counts and percentages in an accessible list widget
+- **Arrow Key Navigation**: Review each option's results individually
+- **Clear Information**: Format like "Option 1: 5 votes (41.7%)"
+
+### Poll Accessibility Features
+- **Screen Reader Support**: Full compatibility with Orca, NVDA, and other screen readers
+- **Keyboard Only**: Complete functionality without mouse interaction
+- **Clear Announcements**: Descriptive text for poll status and options
+- **Focus Management**: Proper tab order and focus placement
+- **Error Handling**: Accessible feedback for voting errors (duplicate votes, etc.)
+
 ## Accessibility Features
 
 - Complete keyboard navigation
@@ -120,6 +153,7 @@ yay -S python-plyer
 - Focus management and tab order
 - Accessible names and descriptions for all controls
 - Thread expansion/collapse with audio feedback
+- Poll creation and voting with full accessibility support
 
 ## Sound Pack Creation and Installation