Locked notes hardening. Locking a note now also removes its copy from your sync folder, and unlocking puts it back. Locked notes no longer appear in backlinks or tag counts, and a [[link]] pointing at one tells you where it lives instead of creating a duplicate note. Repeated wrong passcodes now have to wait: four free tries, then 30s doubling up to 5 minutes, and the wait survives a force stop. The Locked screen always blocks screenshots. Still a UI gate in the app, not encryption at rest.
