增加板块内置顶，与全局置顶分离：首页仅抬升全局置顶，板块列表优先全局再板块。

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

frontend/src/pages/admin/AdminPostsPage.tsx

@@ -111,6 +111,18 @@ export default function AdminPostsPage() {
     }
   };
 
+  const toggleBoardPin = async (post: PostItem) => {
+    try {
+      const r = await api.adminBoardPinPost(post.id, !post.board_pinned);
+      clearAllFeedCache();
+      window.dispatchEvent(new Event('posts-refresh'));
+      notify.success(r.message);
+      load(page);
+    } catch (e: unknown) {
+      notify.error(e instanceof Error ? e.message : '操作失败');
+    }
+  };
+
   const toggleFeature = async (post: PostItem) => {
     try {
       const r = await api.adminFeaturePost(post.id, !post.featured);
@@ -196,7 +208,7 @@ export default function AdminPostsPage() {
             ? '回收站中的帖子可恢复或永久删除；永久删除后不可撤销'
             : tab === 'pending'
               ? '审核普通用户提交的帖子；通过后公开，拒绝后仅作者可见并私信通知'
-              : '精华、置顶、锁定编辑、删除（移入回收站）；支持按标题、标签或正文搜索'}
+              : '精华、全局置顶、板块置顶、锁定编辑、删除（移入回收站）；支持按标题、标签或正文搜索'}
         </p>
       </div>
 
@@ -316,7 +328,8 @@ export default function AdminPostsPage() {
                   <th>标签</th>
                   <th>评论</th>
                   <th>精华</th>
-                  <th>置顶</th>
+                  <th>全局置顶</th>
+                  <th>板块置顶</th>
                   <th>锁定</th>
                   <th>点赞</th>
                   <th>浏览</th>
@@ -348,6 +361,7 @@ export default function AdminPostsPage() {
                     <td>{p.comment_count ?? 0}</td>
                     <td>{p.featured ? <Badge variant="orange">是</Badge> : '—'}</td>
                     <td>{p.pinned ? <Badge variant="green">是</Badge> : '—'}</td>
+                    <td>{p.board_pinned ? <Badge variant="green">是</Badge> : '—'}</td>
                     <td>{p.edit_locked ? <Badge variant="destructive">是</Badge> : '—'}</td>
                     <td>{p.like_count}</td>
                     <td>{p.view_count}</td>
@@ -373,7 +387,10 @@ export default function AdminPostsPage() {
                           {p.featured ? '取消精华' : '精华'}
                         </Button>
                         <Button size="sm" variant="outline" onClick={() => togglePin(p)}>
-                          {p.pinned ? '取消置顶' : '置顶'}
+                          {p.pinned ? '取消全局置顶' : '全局置顶'}
+                        </Button>
+                        <Button size="sm" variant="outline" onClick={() => toggleBoardPin(p)}>
+                          {p.board_pinned ? '取消板块置顶' : '板块置顶'}
                         </Button>
                         <Button size="sm" variant="outline" onClick={() => toggleLock(p)}>
                           {p.edit_locked ? <><LockOpen size={14} /> 解锁</> : <><Lock size={14} /> 锁定</>}