feat: 论坛贴吧风格大升级（L1版块索引+L2版块页+L3楼层帖+置顶/加精/多版主/admin超管+后台帖子管理+分享）

frontend/src/admin/main.jsx

@@ -20,6 +20,7 @@ import EmailSettings from './pages/EmailSettings.jsx';
 import BlogManage from './pages/BlogManage.jsx';
 import CommentManage from './pages/CommentManage.jsx';
 import ForumManage from './pages/ForumManage.jsx';
+import PostManage from './pages/PostManage.jsx';
 import Users from './pages/Users.jsx';
 import Announcements from './pages/Announcements.jsx';
 import Links from './pages/Links.jsx';
@@ -104,6 +105,7 @@ function AdminApp() {
             <Route path="/blog" element={<BlogManage />} />
             <Route path="/comments" element={<CommentManage />} />
             <Route path="/forum" element={<ForumManage />} />
+            <Route path="/posts" element={<PostManage />} />
             <Route path="/users" element={<Users />} />
             <Route path="/announcements" element={<Announcements />} />
             <Route path="/links" element={<Links />} />