Add administrative room close and reopen controls

Preserve readable private tables, discussion and pending games while closure blocks new play, joins, messages, AI and seat mutations. Add live-authorized atomic closure audits, room-version/revision fences, dedicated controls and exact saved retries. Reopen with the saved pause/join settings and current credentials; restoring a removed but closed room keeps its AI stopped.

Verified types, lint, 5356 offline tests, 52 HTTP tests and build. Seventeen dedicated authenticated HTTP groups and independent privacy/persistence review passed. Desktop/mobile browser QA confirmed one close after a lost response and refresh, persistent readable notices, retained private draft, mobile reopening and saved-seat refresh. All 2,001 baseline rooms, 4,243 seats and related records preserved. Positive production admin acceptance awaits authorized QA access; full admin and rules gates remain open.

docs/IMPLEMENTATION_STATUS.md

@@ -1,5 +1,23 @@
 # Dune implementation status
 
+## 22 September 2026 — Administrative close/reopen prototype
+
+[Close or reopen](ADMIN_ROOM_CLOSURE.md) now separates administrative availability
+from the saved game's rules status and winner. It retains readable private tables
+and discussion, blocks new player/AI/seat/message mutations, and preserves exact
+prior receipts. Atomic audit/version/revision fences and independent closure
+metadata compose with pause, lobby configuration and recoverable removal.
+Reopening preserves credentials and pending choices, with existing AI pacing.
+
+Independent review corrected recovery-claim scope, unnecessary closed-room worker
+scheduling and typed closure errors after write races. Focused runtime checks,
+dedicated HTTP acceptance and lost-response/mobile browser QA accompany the
+checkpoint. Source-bound broad checks and preservation evidence remain private;
+production acceptance must match the deployed checkpoint. Archive, permanent
+removal, bulk operations and the rest of the full administration panel remain
+unfinished; this does not certify complete rules or open publication gates.
+
+
 ## 22 September 2026 — Recoverable room removal and restoration
 
 Added [administrator removal/restoration](ADMIN_ROOM_REMOVAL.md) with a typed-room