Refactor test error handling and status updates in HostsManagerApp tests

tests/test_save_confirmation_modal.py

@@ -279,7 +279,9 @@ class TestSaveConfirmationIntegration:
         """Test exit_edit_entry_mode cleans up properly."""
         app.entry_edit_mode = True
         app.original_entry_values = {"test": "data"}
-        app.update_entry_details = Mock()
+        
+        # Mock the details_handler and query_one methods
+        app.details_handler.update_entry_details = Mock()
         app.query_one = Mock()
         app.update_status = Mock()
 
@@ -290,6 +292,6 @@ class TestSaveConfirmationIntegration:
 
         assert not app.entry_edit_mode
         assert app.original_entry_values is None
-        app.update_entry_details.assert_called_once()
+        app.details_handler.update_entry_details.assert_called_once()
         mock_table.focus.assert_called_once()
         app.update_status.assert_called_once_with("Exited entry edit mode")