Task 2: guard SeriesApp NFOService init on NFOServiceFactory fallback and document config-only TMDB API key support

tests/unit/test_series_app.py

@@ -49,6 +49,33 @@ class TestSeriesAppInitialization:
         with pytest.raises(RuntimeError):
             SeriesApp(test_dir)
 
+    @patch('src.core.SeriesApp.Loaders')
+    @patch('src.core.SeriesApp.SerieScanner')
+    @patch('src.core.SeriesApp.SerieList')
+    @patch('src.core.services.nfo_factory.get_nfo_factory')
+    @patch('src.core.SeriesApp.settings')
+    def test_init_uses_config_fallback_for_nfo_service(
+        self,
+        mock_settings,
+        mock_get_factory,
+        mock_serie_list,
+        mock_scanner,
+        mock_loaders,
+    ):
+        """SeriesApp should initialize NFO via config.json even when TMDB_API_KEY is unset."""
+        test_dir = "/test/anime"
+        mock_settings.tmdb_api_key = None
+
+        mock_factory = Mock()
+        mock_service = Mock()
+        mock_factory.create.return_value = mock_service
+        mock_get_factory.return_value = mock_factory
+
+        app = SeriesApp(test_dir)
+
+        assert app.nfo_service is mock_service
+        mock_get_factory.assert_called_once()
+
 
 class TestSeriesAppSearch:
     """Test search functionality."""