refactor: Update exception handling parameters in context managers for consistency

tests/test_export_manager.py

@@ -152,7 +152,7 @@ class TestExportManager:
 
     @patch('matplotlib.pyplot.draw')
     @patch('matplotlib.pyplot.pause')
-    def test_save_graph_as_image_success(self, mock_pause, mock_draw, export_manager):
+    def test_save_graph_as_image_success(self, _mock_pause, _mock_draw, export_manager):
         """Test successful graph image saving."""
         with tempfile.TemporaryDirectory() as temp_dir:
             temp_path = Path(temp_dir)