All clear. Palace Mail passed all checks:

- **Layout**: Header with owner tabs, account pills, split list/detail pane, compose button — all present and correct
- **APIs**: All 6 IMAP accounts returning emails (28 total across accounts), search working, message detail working, archive/delete handling correctly
- **Functionality**: Compose modal opens with correct From dropdown, reply pre-fills To/subject/body, forward pre-fills subject/body, thread mode persists, owner switching reloads correct accounts
- **Code integrity**: JavaScript balanced and all event listeners properly bound

No fixes needed.