fix: handle {data: [...]} API response format in server availability, bump cache buster to v3

index.html

@@ -1735,7 +1735,7 @@
         </footer>
 
         <!-- ── JavaScript ───────────────────────────────────────────────── -->
-        <script src="assets/js/script.js?v2" defer></script>
+        <script src="assets/js/script.js?v3" defer></script>
 
         <div class="pricing-toast" id="pricing-toast"></div>
     </body>