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Apr 18 18:09 chore: completely remove base64 payloads to fix buffer explosion and silent socket crashes, rely strictly on lightweight xethub urls 17:45 fix: store session json in url/base64 modes, scan disk for missing sessions, support url mode late joining, and display available sessions on select screen Apr 2 07:06 Add complete SSE backend with all API endpoints and detailed documentation - Add /api/events - SSE real-time streaming
- Add /api/session - Create, join, end sessions
- Add /api/slide - Slide control (next, prev, goto, upload)
- Add /api/chat - Chat messaging
- Add /api/poll - Create, vote, end polls
- Add /api/doubt - Submit and resolve doubts with images
- Add /api/whiteboard - Real-time drawing
- Add /api/react - Emoji reactions
- Add session-manager.ts - In-memory state management
- Add types.ts - TypeScript type definitions
- Update API docs with complete examples for all endpoints 
