fix: regenerate index.html to ensure auto-generated timestamp

Author: myoshi2891

public/index.html

@@ -795,7 +795,7 @@ <h1 class="site-title">
 
     <footer>
         <span class="footer-icon">🧪</span>
-        Generated on 2026-02-27 05:04:42 UTC
+        Generated on 2026-02-27 05:13:44 UTC
     </footer>
 
     <script>