fix: cache key v5 to force URL refresh

index.html

@@ -1159,7 +1159,7 @@
 // Auto-update Pinggy URLs from FINAL-Bench/service-urls dataset (1h TTL)
 (function() {
   var URLS_API = 'https://huggingface.co/datasets/FINAL-Bench/service-urls/resolve/main/urls.json';
-  var CACHE_KEY = 'vidraft_demo_urls_v4';
+  var CACHE_KEY = 'vidraft_demo_urls_v5';
   var CACHE_TTL = 3600000; // 1 hour
 
   function applyUrls(data) {