Enhance API structure and documentation: Added new tags for Account, Integration, Automation, Linker, Optimizer, and Publisher; updated billing endpoints for admin and customer; improved API reference documentation; fixed endpoint paths in frontend services.

backend/igny8_core/modules/billing/urls.py

@@ -20,6 +20,9 @@ urlpatterns = [
     path('', include(router.urls)),
     # User-facing billing overview
     path('account_balance/', BillingOverviewViewSet.as_view({'get': 'account_balance'}), name='account-balance'),
+    # Canonical credit balance endpoint
+    path('credits/balance/', CreditBalanceViewSet.as_view({'get': 'list'}), name='credit-balance-canonical'),
+    # Explicit list endpoints
     path('transactions/', CreditTransactionViewSet.as_view({'get': 'list'}), name='transactions'),
     path('usage/', CreditUsageViewSet.as_view({'get': 'list'}), name='usage'),
     # Admin billing endpoints