完善角色与消息权限：收紧板管内容处置，彻底删除仅站长，并统一管理删帖/评弹窗。

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

frontend/app/admin/content/page.tsx

@@ -10,7 +10,7 @@ import {
   type AdminContentStatus,
 } from "@/lib/api";
 import { getMeCached, getPublicSettingsCached } from "@/lib/serverData";
-import { canModerateAny, isSuperOrOwner } from "@/lib/roles";
+import { canModerateAny, isSuperOrOwner, isOwner } from "@/lib/roles";
 import Forbidden from "../Forbidden";
 import ContentAdmin, { type ContentKind } from "./ContentAdmin";
 
@@ -93,6 +93,8 @@ export default async function AdminContentPage({ searchParams }: ContentPageProp
       initialCounts={counts}
       initError={initError}
       canConfigureSettings={isSuperOrOwner(me.user.role)}
+      canPurge={isOwner(me.user.role)}
+      viewerRole={me.user.role}
       initialSettings={settings}
     />
   );