feat(albums): soft-delete albums (admin+owner, hidden & irreversible, both app entries)

契约 deleteAlbum（DELETE /albums/{albumId} → 204 幂等）+ status enum 'deleted'：
- 服务端：softDelete（canView 404→canManage 403 防枚举；乐观锁 claim +
  outbox album.updated priority=high + audit album.delete）；列表/详情/更新/
  成员/资产/分类/水印/照片/展示位绑定全部 deleted→404；公开端 cn
  （status!=='active'）与 ov（isAlbumVisibleOv）天然屏蔽；ov 副本经
  album.updated 载荷 status 直投自动下线
- Admin：列表表格操作「删除」+ 详情页头「删除相册」（确认含不可恢复说明）
- App：操作面板「删除相册」（红字、二次确认、成功退回列表并刷新）
- 验证：API 56/56、App 397/397（analyze 0）、admin typecheck/lint/test/build 绿

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

apps/mobile/lib/l10n/app_localizations.dart

@@ -1933,6 +1933,30 @@ abstract class AppLocalizations {
   /// In zh, this message translates to:
   /// **'观众将不再看到这张照片。相册管理者可重新发布。'**
   String get hidePhotoBody;
+
+  /// No description provided for @deleteAlbum.
+  ///
+  /// In zh, this message translates to:
+  /// **'删除相册'**
+  String get deleteAlbum;
+
+  /// No description provided for @deleteAlbumConfirmTitle.
+  ///
+  /// In zh, this message translates to:
+  /// **'删除这个相册？'**
+  String get deleteAlbumConfirmTitle;
+
+  /// No description provided for @deleteAlbumConfirmBody.
+  ///
+  /// In zh, this message translates to:
+  /// **'删除后立即不可见且不可恢复。数据保留，恢复需运维处理。'**
+  String get deleteAlbumConfirmBody;
+
+  /// No description provided for @albumDeleted.
+  ///
+  /// In zh, this message translates to:
+  /// **'相册已删除'**
+  String get albumDeleted;
 }
 
 class _AppLocalizationsDelegate