Palace Mail self-heal complete. All tests passed — no issues found.

**Summary:**
- Layout: Header with Junwon/Ace tabs, account domain pills, split list/detail pane, compose button — all correct
- APIs: All 6 endpoints responding correctly (`inbox`, `message`, `search`, `attachment`, `archive`, `delete`)
- Features: Owner tab switching, account switching, folder tabs, email open/detail, reply/forward prefill, compose modal, thread mode, search, swipe gestures, pagination — all verified functional
- No rebuild needed