Keep guest rooms moderated and restore owner moderation

database/migrations/2026_09_24_125529_reconcile_guest_rooms_after_player_cleanup.php

@@ -0,0 +1,48 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        DB::table('rooms')
+            ->whereNull('owner_id')
+            ->whereNull('deleted_at')
+            ->whereNotIn('id', DB::table('players')->select('room_id'))
+            ->update(['deleted_at' => now()]);
+
+        DB::table('rooms')
+            ->whereNull('owner_id')
+            ->whereNull('deleted_at')
+            ->whereNotIn('id', DB::table('players')->where('is_moderator', true)->select('room_id'))
+            ->select('id')
+            ->chunkById(100, function ($rooms): void {
+                foreach ($rooms as $room) {
+                    $playerId = DB::table('players')
+                        ->where('room_id', $room->id)
+                        ->orderBy('created_at')
+                        ->orderBy('id')
+                        ->value('id');
+
+                    if ($playerId !== null) {
+                        DB::table('players')
+                            ->where('id', $playerId)
+                            ->update(['is_moderator' => true]);
+                    }
+                }
+            });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // Deleted rooms and former moderator assignments cannot be reconstructed.
+    }
+};