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/app/p/[slug]/page.tsx

@@ -1,8 +1,11 @@
 import type { Metadata } from "next";
+import { cookies } from "next/headers";
 import { notFound } from "next/navigation";
 import { Megaphone } from "lucide-react";
 import { fetchSitePageBySlug, fetchOverview } from "@/lib/api";
-import { getPublicSettingsCached } from "@/lib/serverData";
+import { authCookieHeader } from "@/lib/cookies";
+import { getMeCached, getPublicSettingsCached } from "@/lib/serverData";
+import { isAdminOrAbove } from "@/lib/roles";
 import { extractToc, estimateReadingMinutes, markdownHeadingToc } from "@/lib/toc";
 import MarkdownBody from "@/components/MarkdownBody";
 import PostToc from "@/components/PostToc";
@@ -38,16 +41,19 @@ export async function generateMetadata({ params }: PageProps): Promise<Metadata>
 
 export default async function SitePagePublic({ params }: PageProps) {
   const { slug } = await params;
-  const [data, overview, settings] = await Promise.all([
+  const cookie = authCookieHeader(await cookies());
+  const [data, overview, settings, me] = await Promise.all([
     fetchSitePageBySlug(slug).catch(() => null),
     fetchOverview().catch(() => null),
     getPublicSettingsCached(),
+    getMeCached(cookie || undefined),
   ]);
   if (!data) notFound();
 
   const p = data.page;
   const sidebarPages = overview?.sidebar_pages ?? [];
   const announcements = overview?.announcements ?? [];
+  const canManagePages = !!me.user && isAdminOrAbove(me.user.role);
   const siteLead = settings.site_description?.trim() || undefined;
   const toc = extractToc(p.content);
   const headingToc = markdownHeadingToc(toc);
@@ -76,7 +82,11 @@ export default async function SitePagePublic({ params }: PageProps) {
   const left = (
     <>
       <SiteDocIdentity kind="about" lead={siteLead} />
-      <SiteDocPageNav pages={sidebarPages} currentSlug={slug} />
+      <SiteDocPageNav
+        pages={sidebarPages}
+        currentSlug={slug}
+        canManage={canManagePages}
+      />
     </>
   );
 
@@ -101,7 +111,7 @@ export default async function SitePagePublic({ params }: PageProps) {
           <SiteDocBreadcrumb
             items={[
               { href: "/", label: "首页" },
-              { label: "关于本站" },
+              { href: "/about", label: "关于本站" },
               { label: p.title },
             ]}
           />
@@ -109,7 +119,12 @@ export default async function SitePagePublic({ params }: PageProps) {
         mobileExtras={
           <>
             {toc.length > 0 ? <PostToc items={toc} /> : null}
-            <SiteDocPageNav pages={sidebarPages} currentSlug={slug} title="文档目录" />
+            <SiteDocPageNav
+              pages={sidebarPages}
+              currentSlug={slug}
+              title="文档目录"
+              canManage={canManagePages}
+            />
             {toc.length === 0 && announcements.length > 0 ? (
               <SiteDocAnnoNav items={announcements} />
             ) : null}