chore(agents): place Polish before Bug Fixes in changelog sections

[wbxl2000]

Related Issue

N/A — agent workflow tweak.

Problem

The sync-changelog skill ordered changelog sections as Features → Bug Fixes → Polish → Refactors → Other. We want Polish (优化) to appear before Bug Fixes (修复) so user-visible improvements are listed ahead of fixes in the docs changelog and the pre-release preview.

What changed

Reorder the section order in .agents/skills/sync-changelog/SKILL.md to Features → Polish → Bug Fixes → Refactors → Other, and update the section-definition table to match. pre-changelog inherits this order automatically since it delegates ordering to sync-changelog.

Checklist

• I have read the CONTRIBUTING document.
• I have linked a related issue, or explained the problem above.
• I have added tests that prove my feature works. (N/A — skill doc change)
• Ran gen-changesets skill, or this PR needs no changeset. (No changeset — skill doc, not bundled)
• Ran gen-docs skill, or this PR needs no doc update. (N/A — skill doc change)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 732f94b

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[chatgpt-codex-connector]

Keep pre-changelog ordering instructions in sync

Changing this canonical order leaves the preview workflow with contradictory hard-coded ordering: .agents/skills/pre-changelog/SKILL.md still says to bucket/render Features / Bug Fixes / Polish / Refactors / Other and lists the Chinese headings as 新功能 / 修复 / 优化 / 重构 / 其他 (lines 42-43, with the sample output showing 修复 before any polish section). For release PRs that contain both fixes and polish, running pre-changelog can therefore produce the old preview order while the post-release docs sync uses the new order, defeating the intended pre-release review of the final changelog layout.

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