feat(notifications): implement notification system with CRUD operations and UI integration

src/contexts/BrandingContext.jsx

@@ -11,6 +11,8 @@ export function BrandingProvider({ children }) {
     hasLogo: false,
     logoUrl: null,
     defaultTheme: null,
+    imprintUrl: null,
+    privacyUrl: null,
   });
 
   const fetchBranding = useCallback(async () => {