feat: Add WebMCP token polling for automatic browser connection

- Add token API endpoint to server for storing/retrieving pending tokens
- Add token polling in frontend to auto-detect and connect with tokens
- Add xterm dependencies for terminal functionality
- Add terminal page support in toolRegistry

server/package.json

@@ -1,9 +1,12 @@
 {
   "name": "agent-ui-server",
   "version": "1.0.0",
-  "type": "module",
   "scripts": {
     "start": "bun run index.ts",
     "dev": "bun --watch run index.ts"
+  },
+  "type": "module",
+  "dependencies": {
+    "@skitee3000/bun-pty": "^0.3.3"
   }
 }