feat(ui): improve workflow elements scroll area

ui/package.json

@@ -15,6 +15,7 @@
     "ahooks": "^3.8.4",
     "antd": "^5.23.1",
     "antd-zod": "^6.0.1",
+    "clsx": "^2.1.1",
     "cron-parser": "^4.9.0",
     "file-saver": "^2.0.5",
     "i18next": "^24.2.1",
@@ -29,6 +30,7 @@
     "react-dom": "^18.3.1",
     "react-i18next": "^15.4.0",
     "react-router-dom": "^7.1.3",
+    "tailwind-merge": "^2.6.0",
     "zod": "^3.24.1",
     "zustand": "^5.0.3"
   },