fix: Dialog not closing after successful page creation

- Fixed response handling in mutationFn
- api.post() returns JSON directly, not wrapped in { data: ... }
- Return response instead of response.data

admin-spa/src/routes/Appearance/Pages/components/CreatePageModal.tsx

@@ -52,8 +52,9 @@ export function CreatePageModal({ open, onOpenChange, onCreated }: CreatePageMod
             isSubmittingRef.current = true;
 
             try {
+                // api.post returns JSON directly (not wrapped in { data: ... })
                 const response = await api.post('/pages', { title: data.title, slug: data.slug });
-                return response.data;
+                return response; // Return response directly, not response.data
             } finally {
                 // Reset after a delay to prevent race conditions
                 setTimeout(() => {