Update ui.py

ui.py

@@ -122,7 +122,7 @@ def _shell(page_index_0: int, html_table: str, *, search_query: str = "") -> str
   {_render_pagination(page_num)}
 <script>
   document.addEventListener("DOMContentLoaded", function() {{
-    fetch("/build_all", {{ method: "POST" }}).catch(()=>{});
+    fetch("/build_all", {{ method: "POST" }}).catch(()=>{{}});
     const poll = () => {{
       fetch("/status").then(r=>r.json()).then(s => {{
         if (s.complete) {{