update for correct file loading

index.html

@@ -3641,7 +3641,7 @@ console.log('✅ Global timer management functions loaded');
 if ('serviceWorker' in navigator) {
     window.addEventListener('load', async () => {
         try {
-            const registration = await navigator.serviceWorker.register('/sw.js');
+            const registration = await navigator.serviceWorker.register('./sw.js');
             console.log('✅ PWA: Service Worker registered');
         } catch (error) {
             console.error('❌ PWA: Service Worker registration failed:', error);