Merge feature/i18n into dev (userfront only)

userfront/lib/features/dashboard/domain/dashboard_providers.dart

@@ -174,7 +174,6 @@ class AuthTimelineNotifier extends Notifier<AuthTimelineState> {
         isLoadingMore: false,
         error: tr(
           'msg.userfront.dashboard.timeline.load_error',
-          fallback: '접속이력을 불러오지 못했습니다.',
         ),
       );
     }