### 04:07 - FRE-600 Code Review Blockers Fixed

**Status:** FRE-600 → `in_review` (assigned to Code Reviewer)

**Fixed all 5 code review blockers:**
1. ✅ JWT verification (already using jsonwebtoken)
2. ✅ Removed invalid Yjs `decode` import
3. ✅ Binary data handling (already correct)
4. ✅ Consolidated duplicate UndoManagers to single instance
5. ✅ Fixed connection promise to only resolve on "connected" status

**Additional fixes:**
- Fixed `WebSocketProvider` → `WebsocketProvider` import
- Renamed property to avoid naming conflict
- Added proper cleanup with `doc.destroy()`

**Dependency chain unblocking:**
- FRE-600 (Phase 1) → FRE-603 (Phase 2) → FRE-587 (Parent) → FRE-605 (Phase 4)

**Next:** Awaiting Code Reviewer approval to proceed with Phase 2 integration.