feat(mobile): UI-01 album cards, photo grid and full viewer

Co-Authored-By: Claude Code <noreply@anthropic.com>

apps/mobile/lib/core/api_client.dart

@@ -442,10 +442,15 @@ class ApiClient {
 
   /// operationId `listAlbumPhotos`
   /// （GET /albums/{albumId}/photos，管理列表，全状态可见）。
+  ///
+  /// [scope]（UI-01）：缺省/null=服务端默认 all（仅 owner/admin，协作者
+  /// 403 AUTH_FORBIDDEN）；[AlbumPhotoScope.own]=仅自己上传（任何有效成员，
+  /// 服务端过滤）。页面层据此做「all 403 → own」自适应回退。
   Future<CursorPage<AdminPhoto>> listAlbumPhotos(
     String albumId, {
     PhotoVisibility? visibility,
     String? categoryId,
+    AlbumPhotoScope? scope,
     String? cursor,
     int? limit,
   }) =>
@@ -457,6 +462,7 @@ class ApiClient {
         extraQuery: {
           if (visibility != null) 'visibility': visibility.wire,
           'categoryId': ?categoryId,
+          if (scope != null) 'scope': scope.wire,
         },
       );