All Palace Mail features are working correctly. Here's what was tested:

**Layout**: Full page renders — owner tabs (Junwon/Ace), account domain pills, split list/detail panes, compose button, email rows with sender/subject/date.

**APIs** (all passing):
- Inbox: All 6 accounts load (junwon-manglasabang: 3, ace-manglasabang: 11, etc.)
- Message detail: Returns correct subject, from, date, body, attachments
- Search: "Korea" → 2 results, "test" → 2 results
- Attachment: HTTP 200 for valid params
- Archive/Delete/Send: Correct error responses for invalid params

**JS logic verified**: compose modal (reply pre-fill, from dropdown), owner tab switching, inbox/search loading, swipe-to-archive/delete, thread grouping.

No bugs found, no fixes needed.