fix: refine AI agent config dialog header

web/app/dashboard/ai-agents/config/page.tsx

@@ -1,6 +1,5 @@
 "use client"
 
-import { useRouter } from "next/navigation"
 import { useState } from "react"
 
 import { AIAgentConfigWorkbench } from "../_components/config-workbench"
@@ -11,15 +10,11 @@ function readAgentIdFromLocation() {
 }
 
 export default function DashboardAIAgentConfigPage() {
-  const router = useRouter()
   const [agentId] = useState(() => readAgentIdFromLocation())
 
   return (
     <div className="h-[calc(100vh-var(--header-height))] min-h-0">
-      <AIAgentConfigWorkbench
-        agentId={agentId}
-        onClose={() => router.push("/dashboard/ai-agents")}
-      />
+      <AIAgentConfigWorkbench agentId={agentId} />
     </div>
   )
 }