Palace Mail self-heal complete — all clear.

**Test summary:**
- Layout: header, owner tabs (Junwon/Ace), account pills, split pane, compose button all render correctly
- All 6 inbox accounts (junwon/ace × manglasabang/palace.fund/palacering) pass
- Sent folder, search, message detail, attachment download — all passing
- UI JS: no syntax errors, all DOM IDs present, compose/reply/swipe/thread logic all correct

No bugs found, no fixes needed.