i18n: zh-TW full audit — 全面繁體化術語、消除簡體殘留（零殘留） - #1075

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