Fix JS syntax error: duplicate q.appendChild block

Bug: previous str_replace introduced duplicate '});' lines after
file queue rendering. Caused 'Unexpected token )' parse error,
which broke ALL JS — addFilesToQueue was undefined → upload didn't work.

User feedback: 'ne dela upload'

Verified with: node -c on extracted script — passes now.

templates/index.html

@@ -650,8 +650,6 @@
         }
         q.appendChild(div);
       });
-        q.appendChild(div);
-      });
       
       q.querySelectorAll(".remove").forEach(btn => {
         btn.addEventListener("click", () => removeFromQueue(parseInt(btn.dataset.idx)));