## Palace Mail Self-Heal Complete

The agent tested all features of Palace Mail and found one bug:

**Bug found and fixed:** `attachment.ts` was using `encodeURIComponent()` inside a quoted string for the `Content-Disposition` header, which is invalid per RFC 6266. The fix switches to the correct RFC 5987 `filename*=UTF-8''...` format, ensuring non-ASCII filenames (spaces, accented chars, etc.) display correctly when downloading attachments.

Everything else passed:
- Layout renders correctly (header, owner tabs, account pills, split pane, email list)
- All API endpoints working (inbox, message, search, archive, delete, send, subscribe)
- Compose modal, reply, owner tab switching, account pill switching — all functional
- App rebuilt and restarted after the fix