Brummel
8173ff2f26
Iterates the user's data dir and removes every case directory that carries a .closed marker. Requires form field confirm=yes as a server- side guard against accidental browser-history re-POSTs. Emits CasePurged per successfully removed case; per-case failures are logged but do not abort the sweep. UI button is deferred to the show-closed step so the endpoint is only reachable after an explicit navigation. Three integration tests cover the happy path, missing-confirm, and coexistence with open cases.