Upgrade agent and CopilotKit dependencies

frontend/package.json

@@ -9,14 +9,16 @@
     "build": "vite build",
     "preview": "tsx server.ts",
     "typecheck": "tsc --noEmit",
+    "e2e": "playwright test",
+    "demo": "PW_DEMO=1 playwright test --grep @demo",
     "gen:api": "openapi-typescript openapi.json -o src/lib/api-types.gen.ts"
   },
   "dependencies": {
     "@ag-ui/client": "0.0.57",
     "@base-ui/react": "^1.4.1",
-    "@copilotkit/react-core": "1.62.2",
-    "@copilotkit/react-ui": "1.62.2",
-    "@copilotkit/runtime": "1.62.2",
+    "@copilotkit/react-core": "1.62.3",
+    "@copilotkit/react-ui": "1.62.3",
+    "@copilotkit/runtime": "1.62.3",
     "@fontsource-variable/ibm-plex-sans": "^5.2.8",
     "@fontsource-variable/noto-sans": "^5.2.10",
     "@hono/node-server": "^1.14.4",
@@ -41,6 +43,7 @@
     "tw-animate-css": "^1.4.0"
   },
   "devDependencies": {
+    "@playwright/test": "^1.61.1",
     "@tailwindcss/vite": "^4",
     "@types/node": "^20",
     "@types/react": "^19",