fix(browser): host agent browser in workbench

scripts/verify-ui.mjs

@@ -109,7 +109,7 @@ const STUB = `<script>
     browser: {
       create: async()=>({id:'offline-browser',title:'离线浏览器',url:'about:blank'}),
       get: async(id)=>({id:id,title:'',url:'about:blank',canGoBack:false,canGoForward:false,loading:false}),
-      navigate: async()=>({}), back: async()=>({}), forward: async()=>({}), reload: async()=>({}), bounds: async()=>{}, close: async()=>{}, rebind: async()=>{}
+      navigate: async()=>({}), back: async()=>({}), forward: async()=>({}), reload: async()=>({}), bounds: async()=>{}, close: async()=>{}, rebind: async()=>{}, onEvent:()=>()=>{}
     },
     terminal: {
       create: async()=>({id:'offline-terminal',title:'终端'}),