feat: 关于本站对齐站点公告，增加全部与管理入口

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/components/site-doc/index.ts

@@ -1,5 +1,6 @@
 export { default as SiteDocShell } from "./SiteDocShell";
 export { default as SiteDocIdentity } from "./SiteDocIdentity";
+export { default as AboutSiteHeader } from "./AboutSiteHeader";
 export { default as SiteDocPageNav } from "./SiteDocPageNav";
 export { default as SiteDocAnnoNav } from "./SiteDocAnnoNav";
 export { default as SiteDocMasthead } from "./SiteDocMasthead";