improved agent

package.json

@@ -8,13 +8,14 @@
     "dev": "vite",
     "build": "tsc -b && vite build",
     "lint": "eslint .",
+    "format": "prettier --write .",
     "preview": "vite preview"
   },
   "dependencies": {
     "@assistant-ui/react": "^0.8.0",
     "@assistant-ui/react-markdown": "^0.8.0",
-    "@langchain/core": "^0.3.40",
-    "@langchain/langgraph": "^0.2.46",
+    "@langchain/core": "^0.3.41",
+    "@langchain/langgraph": "^0.2.49",
     "@langchain/langgraph-api": "*",
     "@langchain/langgraph-cli": "*",
     "@langchain/langgraph-sdk": "*",
@@ -29,6 +30,7 @@
     "esbuild": "^0.25.0",
     "esbuild-plugin-tailwindcss": "^2.0.1",
     "lucide-react": "^0.476.0",
+    "prettier": "^3.5.2",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "remark-gfm": "^4.0.1",