debug: Add extensive logging to find API response structure

## Issue:
Endless loading - React Query says query returns undefined

## Debug Logging Added:
- Log full API response
- Log response.data
- Log response type
- Check if response has template fields directly
- Check if response.data has template fields
- Return appropriate data structure

This will show us exactly what the API returns so we can fix it properly.

Refresh page and check console!

admin-spa/src/routes/Settings/Notifications/EditTemplate.tsx

@@ -43,7 +43,24 @@ export default function EditTemplate() {
       console.log('Fetching template for:', eventId, channelId);
       const response = await api.get(`/notifications/templates/${eventId}/${channelId}`);
       console.log('API Response:', response);
-      return response.data;
+      console.log('API Response.data:', response.data);
+      console.log('API Response type:', typeof response);
+      
+      // The api.get might already unwrap response.data
+      // Return the response directly if it has the template fields
+      if (response && (response.subject !== undefined || response.body !== undefined)) {
+        console.log('Returning response directly:', response);
+        return response;
+      }
+      
+      // Otherwise return response.data
+      if (response && response.data) {
+        console.log('Returning response.data:', response.data);
+        return response.data;
+      }
+      
+      console.error('No valid template data found in response');
+      return null;
     },
     enabled: !!eventId && !!channelId,
   });