fix(main.tsx): add type field to local UIMessage type

langgraph/src/main.tsx

@@ -4,7 +4,8 @@ import { LoadExternalComponent } from "@langchain/langgraph-sdk/react-ui";
 import type { Message } from "@langchain/langgraph-sdk";
 
 // UIMessage is not exported directly — use a local shape
-type UIMessage = { id: string; name: string; props: Record<string, unknown>; metadata?: { message_id?: string } };
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+type UIMessage = { id: string; type: string; name: string; props: Record<string, unknown>; metadata?: { message_id?: string } };
 import { useState, useRef, useEffect } from "react";
 import ComponentMap from "./agent-uis/index.tsx";
 import "./index.css";