Palace Mail is fully healthy. Here's the summary:

**All features passing** — no bugs found.

What was tested:
- **Layout**: All structural elements render correctly — owner tabs (Junwon/Ace), account domain pills, split pane layout, email rows, compose button
- **Inbox API**: All 6 accounts (junwon/ace across manglasabang, palace.fund, palacering) return emails correctly
- **Sent folder**: Paginated, works on all accounts
- **Search**: Returns filtered results, handles empty results gracefully
- **Message detail**: Subject, from, to, date, HTML body, attachments — all correct
- **Attachments**: Metadata and download endpoint both work
- **Compose modal**: Opens for new/reply/forward, pre-fills correctly (To, Re: prefix, Fwd: body), From dropdown syncs with selected account
- **Owner tab switching**: Resets state and reloads inbox correctly
- **Account pill switching**: Updates account, resets folder, reloads correctly
- **Thread mode**: State management and localStorage persistence working
- **Archive/Delete/Send APIs**: Validation and error handling correct

No fixes were needed.