后台单页和公告改为正文优先编辑，保存与发布分开。

列表按列对照真实路径和状态，避免把 /p/ 前缀和发布操作混在一起。

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

frontend/app/admin/announcements/page.tsx

@@ -1,4 +1,5 @@
 import type { Metadata } from "next";
+import { Suspense } from "react";
 import { cookies } from "next/headers";
 import AnnouncementAdmin from "./AnnouncementAdmin";
 import { authCookieHeader } from "@/lib/cookies";
@@ -28,5 +29,9 @@ export default async function AdminAnnouncementsPage() {
     initError = e instanceof Error ? e.message : "加载公告失败";
   }
 
-  return <AnnouncementAdmin initial={initial} initError={initError} />;
+  return (
+    <Suspense fallback={<p className="meta px-1 py-6">加载公告列表…</p>}>
+      <AnnouncementAdmin initial={initial} initError={initError} />
+    </Suspense>
+  );
 }