Polish and rewrite a blog article for clarity, engagement, and professional quality. Use when user asks to polish, improve, rewrite, edit, or 润色 an article. Triggers for "polish article", "improve writing", "润色文章", "优化文章".
Deep rewrite to make the article more engaging, structured, and professional while preserving the author's voice.
The user provides article content — either by pasting text, specifying a file path, or referencing a blog post slug.
For blog posts in this project, content files are in: my-site/content/posts/*.md
Return only the improved markdown content. No meta-commentary like "Here is the improved version".