Only show CDN info notes when relevant headers are present

- Fastly note (explaining X-Cache layers) only shows when x-cache header exists
- CloudFront note (explaining Origin Shield) only shows on MISS status

Previously, the Fastly note appeared for all Fastly-detected sites even
when they didn't have an x-cache header, which was confusing.

Author: bartTC

CF Cache Status/CF Cache Status Extension/Resources/popup.js

@@ -157,10 +157,10 @@ function updateUI(data) {
     document.getElementById('url-container').classList.remove('hidden');
   }
 
-  // Show CDN-specific info notes
-  if (data?.cdn === 'cloudfront') {
+  // Show CDN-specific info notes (only when relevant headers are present)
+  if (data?.cdn === 'cloudfront' && data.status === 'MISS') {
     document.getElementById('cloudfront-info').classList.remove('hidden');
-  } else if (data?.cdn === 'fastly') {
+  } else if (data?.cdn === 'fastly' && data.headers?.['x-cache']) {
     document.getElementById('fastly-info').classList.remove('hidden');
   }
 }