fix(test): repair test infrastructure and mock fixtures (#281)

* fix(test): repair test infrastructure and mock fixtures

- Add test/__init__.py for proper test collection
- Fix ConfigManager instantiation to use config_path parameter
- Route schedule config through config_service mock
- Update mock to match get_raw_file_content endpoint change

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(test): correct get_main_config assertion per CodeRabbit review

The endpoint calls load_config(), not get_raw_file_content('main').
Also set up load_config mock return value in the fixture so the
test's data assertions pass correctly.

Co-Authored-By: 5ymb01 <noreply@github.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(test): correct plugin config test mock structure and schema returns

- Plugin configs live at top-level keys, not under 'plugins' subkey
- Mock schema_manager.generate_default_config to return a dict
- Mock schema_manager.merge_with_defaults to merge dicts (not MagicMock)
- Fixes test_get_plugin_config returning 500 due to non-serializable MagicMock

Co-Authored-By: 5ymb01 <noreply@github.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(test): use patch.object for config_service.get_config in schedule tests

config_service.get_config is a real method, not a mock — can't set
return_value on it directly. Use patch.object context manager instead.

Co-Authored-By: 5ymb01 <noreply@github.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: 5ymb01 <5ymb01@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: 5ymb01 <noreply@github.com>

test/test_web_api.py

@@ -29,7 +29,13 @@ def mock_config_manager():
     }
     mock.get_config_path.return_value = 'config/config.json'
     mock.get_secrets_path.return_value = 'config/config_secrets.json'
-    mock.get_raw_file_content.return_value = {'weather': {'api_key': 'test'}}
+    mock_config = {
+        'display': {'brightness': 50},
+        'plugins': {},
+        'timezone': 'UTC'
+    }
+    mock.load_config.return_value = mock_config
+    mock.get_raw_file_content.return_value = mock_config
     mock.save_config_atomic.return_value = MagicMock(
         status=MagicMock(value='success'),
         message=None
@@ -385,17 +391,21 @@ class TestPluginsAPI:
     
     def test_get_plugin_config(self, client, mock_config_manager):
         """Test getting plugin configuration."""
+        # Plugin configs live at top-level keys (not under 'plugins')
         mock_config_manager.load_config.return_value = {
-            'plugins': {
-                'weather': {
-                    'enabled': True,
-                    'api_key': 'test_key'
-                }
+            'weather': {
+                'enabled': True,
+                'api_key': 'test_key'
             }
         }
-        
+
+        # Ensure schema manager returns serializable values
+        from web_interface.blueprints.api_v3 import api_v3
+        api_v3.schema_manager.generate_default_config.return_value = {'enabled': False}
+        api_v3.schema_manager.merge_with_defaults.side_effect = lambda config, defaults: {**defaults, **config}
+
         response = client.get('/api/v3/plugins/config?plugin_id=weather')
-        
+
         assert response.status_code == 200
         data = json.loads(response.data)
         assert 'enabled' in data or 'config' in data or 'data' in data