refactor：用 AdminApiList 统一后台列表类接口的响应格式

app/Models/AdminUser.php

@@ -73,6 +73,38 @@ class AdminUser extends Authenticatable
         )->withPivot(['site_id', 'granted_at']);
     }
 
+    /**
+     * 将用户在默认站点上的角色设为指定 slug 集合（全量替换该站点 pivot）。
+     *
+     * @param  list<string>  $slugs
+     */
+    public function syncRoleSlugsForDefaultSite(array $slugs): void
+    {
+        $siteId = self::defaultAdminSiteId();
+        $slugs = array_values(array_unique($slugs));
+        $roleIds = DB::table('admin_roles')
+            ->whereIn('slug', $slugs)
+            ->pluck('id')
+            ->all();
+
+        DB::transaction(function () use ($siteId, $roleIds): void {
+            DB::table('admin_user_site_roles')
+                ->where('admin_user_id', $this->id)
+                ->where('site_id', $siteId)
+                ->delete();
+
+            $now = now();
+            foreach ($roleIds as $rid) {
+                DB::table('admin_user_site_roles')->insert([
+                    'admin_user_id' => $this->id,
+                    'site_id' => $siteId,
+                    'role_id' => (int) $rid,
+                    'granted_at' => $now,
+                ]);
+            }
+        });
+    }
+
     public function isSuperAdmin(): bool
     {
         if ($this->relationLoaded('roles')) {