feat(rnotes): add real-time Yjs collaboration, comments, and suggestions
Replace whole-content Automerge sync with character-level Yjs CRDT for
NOTE-type notes. Adds cursor presence, inline comments with threaded
replies, and track-changes suggesting mode.
- Custom Yjs WebSocket provider bridging over existing rSpace WS
- Server-side yjs-sync/yjs-awareness message relay (pure broadcast)
- y-indexeddb for offline persistence, periodic plaintext sync to Automerge
- Comment mark + panel with resolve/reply/delete
- Suggestion insert/delete marks with accept/reject support
- Schema v3→v4 (collabEnabled, comments fields)
- Collab toolbar: comment button, suggesting toggle, peer indicators
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jeff Emmett
a736321189