feat(about): upgrade about page into dual-track work-with-me conversion hub

src/layouts/BaseLayout.astro

@@ -62,8 +62,8 @@ const switchLabel = isZh ? 'EN' : '中文';
 
 // Locale-aware nav labels
 const nav = isZh
-  ? { posts: '文章', categories: '分类', about: '关于', rss: 'RSS' }
-  : { posts: 'Posts', categories: 'Categories', about: 'About', rss: 'RSS' };
+  ? { posts: '文章', categories: '分类', about: '关于与合作', rss: 'RSS' }
+  : { posts: 'Posts', categories: 'Categories', about: 'About & Hire', rss: 'RSS' };
 ---
 
 <!doctype html>