Palace Mail is clean. Full test summary:

**All features verified working:**
- Layout: header, owner tabs (Junwon/Ace), account pills, split pane, compose button
- API endpoints: inbox (all 6 accounts), sent folder, message detail, search, archive, delete, attachment download
- No JavaScript errors, no rendering issues

One non-critical Astro warning about `sharp` support — harmless, doesn't affect anything.

No fixes needed.