Add refresh token functionality and improve login response handling

- Introduced RefreshTokenView to allow users to refresh their access tokens using a valid refresh token.
- Enhanced LoginView to ensure correct user/account loading and improved error handling during user serialization.
- Updated API response structure to include access and refresh token expiration times.
- Adjusted frontend API handling to support both new and legacy token response formats.

backend/igny8_core/modules/system/urls.py

@@ -16,8 +16,8 @@ router.register(r'strategies', StrategyViewSet, basename='strategy')
 router.register(r'settings/system', SystemSettingsViewSet, basename='system-settings')
 router.register(r'settings/account', AccountSettingsViewSet, basename='account-settings')
 router.register(r'settings/user', UserSettingsViewSet, basename='user-settings')
+# Register ModuleSettingsViewSet first
 router.register(r'settings/modules', ModuleSettingsViewSet, basename='module-settings')
-router.register(r'settings/modules/enable', ModuleEnableSettingsViewSet, basename='module-enable-settings')
 router.register(r'settings/ai', AISettingsViewSet, basename='ai-settings')
 
 # Custom URL patterns for integration settings - matching reference plugin structure
@@ -50,7 +50,20 @@ integration_image_gen_settings_viewset = IntegrationSettingsViewSet.as_view({
     'get': 'get_image_generation_settings',
 })
 
+# Custom view for module enable settings to avoid URL routing conflict with ModuleSettingsViewSet
+# This must be defined as a custom path BEFORE router.urls to ensure it matches first
+# The update method handles pk=None correctly, so we can use as_view
+module_enable_viewset = ModuleEnableSettingsViewSet.as_view({
+    'get': 'list',
+    'put': 'update',
+    'patch': 'partial_update',
+})
+
 urlpatterns = [
+    # Module enable settings endpoint - MUST come before router.urls to avoid conflict
+    # When /settings/modules/enable/ is called, it would match ModuleSettingsViewSet with pk='enable'
+    # So we define it as a custom path first
+    path('settings/modules/enable/', module_enable_viewset, name='module-enable-settings'),
     path('', include(router.urls)),
     # Public health check endpoint (API Standard v1.0 requirement)
     path('ping/', ping, name='system-ping'),