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.

drizzle/0013_admin_room_closure.sql

@@ -0,0 +1,28 @@
+CREATE TABLE `admin_room_closures` (
+	`operation_id` text PRIMARY KEY NOT NULL,
+	`actor_admin_id` text NOT NULL,
+	`room_code` text NOT NULL,
+	`request_hash` text NOT NULL,
+	`expected_version` integer NOT NULL,
+	`expected_revision` integer NOT NULL,
+	`applied_version` integer NOT NULL,
+	`applied_revision` integer NOT NULL,
+	`closed` integer NOT NULL,
+	`reason` text NOT NULL,
+	`before_metadata` text NOT NULL,
+	`after_metadata` text NOT NULL,
+	`created_at` integer NOT NULL
+);
+--> statement-breakpoint
+CREATE INDEX `admin_room_closures_room` ON `admin_room_closures` (`room_code`,`created_at`);--> statement-breakpoint
+CREATE TABLE `room_closures` (
+	`room_code` text PRIMARY KEY NOT NULL,
+	`closed` integer DEFAULT 0 NOT NULL,
+	`revision` integer DEFAULT 0 NOT NULL,
+	`closed_at` integer,
+	`updated_at` integer NOT NULL,
+	FOREIGN KEY (`room_code`) REFERENCES `rooms`(`code`) ON UPDATE no action ON DELETE cascade,
+	CONSTRAINT "room_closures_closed" CHECK("room_closures"."closed" IN (0, 1)),
+	CONSTRAINT "room_closures_revision" CHECK("room_closures"."revision" >= 0),
+	CONSTRAINT "room_closures_time" CHECK(("room_closures"."closed" = 1 AND "room_closures"."closed_at" IS NOT NULL) OR ("room_closures"."closed" = 0 AND "room_closures"."closed_at" IS NULL))
+);

drizzle/meta/_journal.json

@@ -92,6 +92,13 @@
       "when": 1790040786205,
       "tag": "0012_admin_room_removal",
       "breakpoints": true
+    },
+    {
+      "idx": 13,
+      "version": "6",
+      "when": 1790042692212,
+      "tag": "0013_admin_room_closure",
+      "breakpoints": true
     }
   ]
 }