fix(grok): 把 #867 落到 main —— 含 #883(P0) 点名的修复，并修掉它自带的一处能力边界回归 - #1010

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, actions/setup-node@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/