refactor: Update exception handling parameters in context managers for consistency

tests/test_ui_manager.py

@@ -282,7 +282,7 @@ class TestUIManager:
             assert medicine_data[0].get() == 0  # IntVar should be 0
 
     @patch('tkinter.messagebox.showerror')
-    def test_error_handling_in_setup_application_icon(self, mock_showerror, ui_manager):
+    def test_error_handling_in_setup_application_icon(self, _mock_showerror, ui_manager):
         """Test error handling in setup_application_icon method."""
         with patch('PIL.Image.open') as mock_open:
             mock_open.side_effect = Exception("Image error")