Palace Code self-heal complete. All systems are passing:

- **Layout**: Page renders correctly with Palace Code title, nav, split-panel layout
- **APIs**: All 9 endpoints tested and working (threads, session-tails, linear-issues, attach-thread, update-thread, delete-thread, chat-stream, sync-linear, transcribe)
- **Data**: 22 threads loaded, 74 Linear issues, session logs parsing correctly
- **Logic**: Thread grouping, time window selector, auto-attach all correct

No bugs found, no fixes needed.