**Self-heal complete — all clear.**

Summary of what was tested:
- Layout: page renders correctly with Palace Code title, split-panel layout, time window selector, and new chat button all present
- APIs: all 8 endpoints working (threads, session-tails, linear-issues, attach-thread, update-thread, delete-thread, sync-linear)
- Redis: running on port 6399, thread store operations functional
- 74 Linear issues loading correctly from tasks-index.json

No bugs found. No fixes needed. No rebuild required.