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

### What was tested

| Feature | Result |
|---|---|
| Layout (header, pills, split pane, compose) | ✅ Pass |
| Inbox API — all 6 accounts | ✅ Pass |
| Message detail fetch | ✅ Pass |
| Attachment download | ✅ Pass |
| Compose modal (new, reply, forward) | ✅ Pass |
| Owner tab switching (Junwon ↔ Ace) | ✅ Pass |
| Account pill switching | ✅ Pass |
| Search API | ✅ Pass |
| Swipe gestures (archive/delete + undo) | ✅ Pass |
| Shadow DOM email rendering | ✅ Pass |
| Push notifications endpoint | ✅ Pass |

No bugs found. No fixes needed. No rebuild required. The two background task failures in the notification are unrelated noise from earlier Chrome queries.