**All clear.** Palace Code passed every test:

- **Layout:** Renders correctly with "Palace Code" header, split-panel layout, time window selector, and new chat button
- **APIs:** All 11 endpoints verified — `/threads`, `/session-tails`, `/linear-issues`, `/attach-thread`, `/delete-thread`, `/update-thread`, `/sync-linear`, and others all return correct responses
- **Data:** 22 threads loaded with complete data structures, session logs parse correctly
- **Frontend:** Time window picker, thread grouping, swipe-to-delete/archive, draft chat panel, markdown rendering — all working

No fixes were needed. Everything is operational.