feat: 帖子全局/板块置顶支持权重排序，优化列表与详情渲染

frontend/src/pages/PostDetailPage.tsx

@@ -806,7 +806,8 @@ export default function PostDetailPage() {
   const handlePin = async () => {
     if (!post) return;
     try {
-      const r = await api.adminPinPost(postId, !post.pinned);
+      const next = post.pinned > 0 ? 0 : 1;
+      const r = await api.adminPinPost(postId, next);
       setPost(p => p ? { ...p, pinned: r.pinned } : p);
       clearAllFeedCache();
       window.dispatchEvent(new Event('posts-refresh'));
@@ -819,7 +820,8 @@ export default function PostDetailPage() {
   const handleBoardPin = async () => {
     if (!post) return;
     try {
-      const r = await api.adminBoardPinPost(postId, !post.board_pinned);
+      const next = (post.board_pinned ?? 0) > 0 ? 0 : 1;
+      const r = await api.adminBoardPinPost(postId, next);
       setPost(p => p ? { ...p, board_pinned: r.board_pinned } : p);
       clearAllFeedCache();
       window.dispatchEvent(new Event('posts-refresh'));
@@ -995,10 +997,10 @@ export default function PostDetailPage() {
 
         <div className="post-detail-head">
           <h1 className="post-detail-title">
-            {post.pinned && (
+            {post.pinned > 0 && (
               <span className="post-pin-badge post-pin-badge--detail" title="全局置顶">全局置顶</span>
             )}
-            {post.board_pinned && (
+            {(post.board_pinned ?? 0) > 0 && (
               <span className="post-pin-badge post-pin-badge--board post-pin-badge--detail" title="板块置顶">板块置顶</span>
             )}
             {post.featured && <FeaturedIcon className="mr-2" size={18} />}

frontend/src/pages/admin/AdminDashboardPage.tsx

@@ -246,9 +246,9 @@ export default function AdminDashboardPage() {
                 </td>
                 <td className="space-x-1">
                   {p.featured ? <Badge variant="orange">推荐</Badge> : null}
-                  {p.pinned ? <Badge variant="green">全局置顶</Badge> : null}
-                  {p.board_pinned ? <Badge variant="green">板块置顶</Badge> : null}
-                  {!p.featured && !p.pinned && !p.board_pinned ? '—' : null}
+                  {p.pinned > 0 ? <Badge variant="green">全局置顶</Badge> : null}
+                  {(p.board_pinned ?? 0) > 0 ? <Badge variant="green">板块置顶</Badge> : null}
+                  {!p.featured && p.pinned <= 0 && (p.board_pinned ?? 0) <= 0 ? '—' : null}
                 </td>
                 <td>{new Date(p.created_at).toLocaleString('zh-CN')}</td>
               </tr>

frontend/src/pages/admin/AdminPostsPage.tsx

@@ -141,9 +141,13 @@ export default function AdminPostsPage() {
     setSearch('');
   };
 
-  const togglePin = async (post: PostItem) => {
+  const togglePin = async (post: PostItem, nextValue?: number) => {
     try {
-      const r = await api.adminPinPost(post.id, !post.pinned);
+      let value = nextValue;
+      if (value === undefined) {
+        value = post.pinned > 0 ? 0 : 1;
+      }
+      const r = await api.adminPinPost(post.id, value);
       clearAllFeedCache();
       window.dispatchEvent(new Event('posts-refresh'));
       notify.success(r.message);
@@ -153,9 +157,13 @@ export default function AdminPostsPage() {
     }
   };
 
-  const toggleBoardPin = async (post: PostItem) => {
+  const toggleBoardPin = async (post: PostItem, nextValue?: number) => {
     try {
-      const r = await api.adminBoardPinPost(post.id, !post.board_pinned);
+      let value = nextValue;
+      if (value === undefined) {
+        value = (post.board_pinned ?? 0) > 0 ? 0 : 1;
+      }
+      const r = await api.adminBoardPinPost(post.id, value);
       clearAllFeedCache();
       window.dispatchEvent(new Event('posts-refresh'));
       notify.success(r.message);
@@ -417,8 +425,8 @@ export default function AdminPostsPage() {
                     <td className="max-w-[120px] truncate text-muted-foreground">{p.tags || '—'}</td>
                     <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.pinned > 0 ? <Badge variant="green">置顶 {p.pinned}</Badge> : '—'}</td>
+                    <td>{(p.board_pinned ?? 0) > 0 ? <Badge variant="green">置顶 {p.board_pinned}</Badge> : '—'}</td>
                     <td>{p.edit_locked ? <Badge variant="destructive">是</Badge> : '—'}</td>
                     <td>{p.comments_locked ? <Badge variant="destructive">是</Badge> : '—'}</td>
                     <td>{p.like_count}</td>
@@ -444,11 +452,55 @@ export default function AdminPostsPage() {
                         <Button size="sm" variant="outline" onClick={() => toggleFeature(p)}>
                           {p.featured ? '取消推荐' : '推荐'}
                         </Button>
-                        <Button size="sm" variant="outline" onClick={() => togglePin(p)}>
-                          {p.pinned ? '取消全局置顶' : '全局置顶'}
+                        <Button size="sm" variant="outline" onClick={() => {
+                          const cur = p.pinned;
+                          if (cur > 0) {
+                            // 已置顶：弹出输入框让管理员调整顺序值
+                            const input = window.prompt(`全局置顶顺序（当前: ${cur}，输入 0 取消置顶）`, String(cur));
+                            if (input == null) return;
+                            const n = parseInt(input, 10);
+                            if (Number.isNaN(n) || n < 0) {
+                              notify.warning('请输入有效的非负整数');
+                              return;
+                            }
+                            void togglePin(p, n);
+                          } else {
+                            // 未置顶：输入框让管理员设置初始值
+                            const input = window.prompt('设置全局置顶顺序（输入 1 即置顶，0 表示不置顶）', '1');
+                            if (input == null) return;
+                            const n = parseInt(input, 10);
+                            if (Number.isNaN(n) || n < 0) {
+                              notify.warning('请输入有效的非负整数');
+                              return;
+                            }
+                            void togglePin(p, n);
+                          }
+                        }}>
+                          {p.pinned > 0 ? `全局置顶(${p.pinned})` : '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 size="sm" variant="outline" onClick={() => {
+                          const cur = p.board_pinned ?? 0;
+                          if (cur > 0) {
+                            const input = window.prompt(`板块置顶顺序（当前: ${cur}，输入 0 取消置顶）`, String(cur));
+                            if (input == null) return;
+                            const n = parseInt(input, 10);
+                            if (Number.isNaN(n) || n < 0) {
+                              notify.warning('请输入有效的非负整数');
+                              return;
+                            }
+                            void toggleBoardPin(p, n);
+                          } else {
+                            const input = window.prompt('设置板块置顶顺序（输入 1 即置顶，0 表示不置顶）', '1');
+                            if (input == null) return;
+                            const n = parseInt(input, 10);
+                            if (Number.isNaN(n) || n < 0) {
+                              notify.warning('请输入有效的非负整数');
+                              return;
+                            }
+                            void toggleBoardPin(p, n);
+                          }
+                        }}>
+                          {(p.board_pinned ?? 0) > 0 ? `板块置顶(${p.board_pinned})` : '板块置顶'}
                         </Button>
                         <Button size="sm" variant="outline" onClick={() => toggleLock(p)}>
                           {p.edit_locked ? <><LockOpen size={14} /> 解锁编辑</> : <><Lock size={14} /> 锁定编辑</>}