feat: fix and improve model list ui and features

frontend/src/backend.js

@@ -354,8 +354,11 @@ export function invalidateCache({ chats=false, agents=false } = {}) {
 // --- Connection ---
 
 export function onConnect (callback) {
-  // TODO: return cancel function
   connectListeners.push(callback);
+  if (socket && socket.readyState === WebSocket.OPEN) {
+    callback();
+  }
+  // TODO: return cancel function
 }
 
 function reconnect() {