- follow lastPickedCase (written by saveLastUsedCase while sync is on), not lastUsedCase, so a quick-start or an agent's spawned worker no longer moves other devices
- close the open case-options popover when the follow or an import changes what it shows; follow through selectQuickStartCase(save:false)
- failed save reuses _noteSettingsWriteResult and says the choice lasts until the next sync
- rename undo renames the shared entry back instead of restoring the whole map; lastPickedCase follows a rename
- caseSettings and lastPickedCase added to the redaction, rename and backup-volatile lists and the docs