- Redact caseSettings for non-admins and never apply a shared map on a read-only page (CASE-SYNC-001)
- Send one case per save and merge it inside mutateSettingsFile, so devices cannot discard each other's cases; rapid saves keep their order (CASE-SYNC-002)
- Check HTTP status and the response body, keep the local choice, report an unsynced save and reuse the forbidden-write handling (CASE-SYNC-003)
- Let the server decide whether sync is on: refresh the cached switch, discard stale refreshes (CASE-SYNC-004)
- Carry shared options through case rename and drop them on delete or unlink
- Give the switch an accessible name; add server, client and two-browser tests
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>