Show view-only on the cloud sync button instead of an editor chip

DESIGN.md allows no status chips in the editor, so the merge dropped
cloud's "View only" chip. A cloud viewer's save slot is the sync
button, so its tooltip now leads with "View only".

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
f01534685eDara Adedeji committed on 9/24/2026, 8:38:36 PMparenta4131f6
2 files changedLine totals unavailable