- Add Vite plugin implementing y-protocols sync server for dev mode
- Fix useYjs hook: move provider creation into useEffect to survive
React StrictMode remounts
- Fix WebSocket URL: use /sync as base (y-websocket appends room name)
- Verified in browser: Connected status, Host badge, awareness working
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
