GitHub Actions PRD Summary

The documentation deployment workflow must focus on static documentation build and GitHub Pages deployment.

Key requirements:

• Trigger on documentation-related changes.
• Include both docs-site/docs/en/** and docs-site/docs/zh/** in path filters.
• Support manual workflow_dispatch.
• Install dependencies from docs-site/requirements.txt.
• Build with MkDocs in strict mode.
• Upload and deploy the generated static site to GitHub Pages.

The full source PRD is maintained at docs-site/github_action_prd.md.