Palace Code self-heal audit complete — **all clear**.

**Tested:**
- Page loads and renders correctly (title, layout, split-panel)
- All 9 API endpoints respond correctly (threads, session-tails, linear-issues, attach/update/delete-thread)
- 6 threads found in the 7d window
- 74 Linear issues loaded (21 active)
- All source components reviewed: Dashboard, DetailPanel, ThreadCard, StatusBadge, all lib files

No bugs found, no fixes needed.