fix

app/web/src/nova/vi/vi.tsx

@@ -99,19 +99,22 @@ export const Vi: FC<{
     for (const url of urls) {
       vi.page.navs[page_id].add(url);
     }
+    return new Promise<void>((done) => {
       clearTimeout(nav.timeout);
       nav.timeout = setTimeout(() => {
         if (vi.on_preload) {
           vi.on_preload({
             urls: Array.from(vi.page.navs[page_id]),
             opt: {
-            on_load: opt?.on_load,
+              on_load: (...arg) => {
+                opt?.on_load?.(...arg);
+                done();
+              },
             },
           });
         }
       }, 100);
-
-    return "";
+    });
   };
 
   vi.layout = layout;