Palace Code is fully healthy. Here's the summary:

**Tested:**
- Layout & rendering (page loads, split-panel structure, CSS variables)
- 9 API endpoints (`/threads`, `/session-tails`, `/linear-issues`, `/attach-thread`, `/update-thread`, `/delete-thread`, `/sync-linear`)
- Component logic: thread polling, window picker (1h–7d/Archived), swipe-to-delete/archive, status badge dropdown, new chat panel

**Result: All passing. No fixes required.**

The only observations were non-breaking dead code (`AttachDropdown`, `NewChatBar`, `StatusTabs` are imported nowhere) and an incomplete feature (Linear issue attachment UI exists in state but isn't rendered yet). No action needed on either.