Prototype paused admin participant AI support

Enable an existing AI difficulty for a human seat through admin controls without granting private access or advancing paused play. Preserve custody, credentials, takeback and separate paced resume. Bind atomic writes and outgoing-grant revocation to live authority, room/pause versions and active seat access with durable exact receipts.

Validation: types/lint, 5408 offline tests, build and 52 HTTP tests passed on source fingerprint 2157de0f4bb0b74d9760d52102601c52344cf674dee8ccd1d559f0a246a1d4ff; 22 authenticated admin HTTP groups, independent SQL/privacy/UI review, desktop/mobile and refresh checks. All 2098 baseline rooms and 4455 seats preserved. Migration 0015 is additive. Positive production admin QA awaits authorized access; full admin/rules scope remains unfinished.

docs/CURRENT_STATUS.md

@@ -6,6 +6,18 @@ Expansion starts and full rules/publication acceptance remain gated.**
 
 ## Current checkpoint and work
 
+Current work adds [participant AI support](ADMIN_PARTICIPANT_AI.md): a live
+owner/operator can enable an existing AI difficulty for an eligible human in a
+paused, started game. Saved custody and seat access remain; the human can take
+back control, and resume is separate. Atomic audit, exact saved retries and
+commit-time room/seat/authority checks are connected. Participant restrictions,
+access revocation, assisted recovery, permanent deletion, bulk actions and
+backup/operations tools remain unfinished. This adds no strategic AI refinement.
+
+Readable-notice checkpoint `137f922` is pushed. Types/lint, 5,381 offline tests,
+52 HTTP tests, build and delayed-response desktop/mobile browser QA passed.
+Its new-revision deployment handoff is pending confirmation.
+
 The [readable-notice follow-up](READABLE_NOTICES.md) extends first-request progress
 to admin operations, AI permissions and seat handovers, preventing recovery
 instructions from flashing before a successful response. Seat recovery/handover
@@ -13,8 +25,8 @@ confirmations remain above the table until Continue. Existing retry proofs and
 rules/AI pacing are unchanged. New-revision deployed acceptance remains separate
 from local checks; positive production admin testing still needs authorized access.
 
-Current work adds [administrative archive/unarchive](ADMIN_ROOM_ARCHIVE.md):
-closed rooms can leave the default directory without changing saved games,
+The connected [administrative archive/unarchive](ADMIN_ROOM_ARCHIVE.md) prototype lets
+closed rooms leave the default directory without changing saved games,
 credentials, discussion or AI deadlines. Unarchiving leaves play closed;
 reopening requires unarchiving first. Exact saved retries and combined archive /
 removal filters preserve recovery. Permanent deletion, bulk actions and full