fix(web): 修复页面切换时 App 样式作用域失效 #31925 - #6042

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, fxy060608/size-check-action@v1.1.5, pnpm/action-setup@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/