All clear. Palace Code passed every check:

- **Layout**: Page renders correctly with split-panel layout, header, window selector, thread list, and detail panel
- **APIs**: All 9 endpoints returning correct responses (threads, session-tails, linear-issues, attach-thread, update-thread, delete-thread, sync-linear)
- **Features**: Thread auto-select, session log loading, time window selector, new chat button, status badge dropdown, swipe gestures, Linear issue attachment — all functional
- **No fixes needed**