feat: 帖子管理收进右上角菜单，手机端评论输入默认折叠

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

frontend/src/components/PostManageMenu.tsx

@@ -0,0 +1,189 @@
+import {
+  Ban,
+  CircleCheck,
+  CircleHelp,
+  EllipsisVertical,
+  History,
+  Lock,
+  LockOpen,
+  MessageSquareOff,
+  Pencil,
+  Pin,
+  Sparkles,
+  Trash2,
+} from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+import type { PostItem } from '../api/types';
+
+export interface PostManageMenuProps {
+  post: PostItem;
+  isAdmin: boolean;
+  isOwnerOrAdmin: boolean;
+  canEdit: boolean;
+  isEdited: boolean;
+  isMobile?: boolean;
+  editRemaining?: string;
+  editBlockReason?: string;
+  deleting?: boolean;
+  onEdit: () => void;
+  onShowRevisions: () => void;
+  onToggleResolved: () => void;
+  onApprove: () => void;
+  onReject: () => void;
+  onFeature: () => void;
+  onPin: () => void;
+  onBoardPin: () => void;
+  onLock: () => void;
+  onCommentsLock: () => void;
+  onDelete: () => void;
+}
+
+/** 帖子右上角管理菜单：编辑、审核、置顶、锁定、删除等 */
+export default function PostManageMenu({
+  post,
+  isAdmin,
+  isOwnerOrAdmin,
+  canEdit,
+  isEdited,
+  isMobile,
+  editRemaining,
+  editBlockReason,
+  deleting,
+  onEdit,
+  onShowRevisions,
+  onToggleResolved,
+  onApprove,
+  onReject,
+  onFeature,
+  onPin,
+  onBoardPin,
+  onLock,
+  onCommentsLock,
+  onDelete,
+}: PostManageMenuProps) {
+  const showContent =
+    canEdit
+    || (isOwnerOrAdmin && isEdited)
+    || (isOwnerOrAdmin && post.post_type === 'question');
+  const hint = editRemaining || (!canEdit && isOwnerOrAdmin ? editBlockReason : '') || '';
+
+  if (!showContent && !isAdmin && !hint) return null;
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button
+          variant="ghost"
+          size="sm"
+          className="post-manage-menu-trigger"
+          aria-label="管理帖子"
+        >
+          {!isMobile && <span>管理</span>}
+          <EllipsisVertical size={16} aria-hidden />
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="post-manage-menu">
+        {hint && (
+          <>
+            <DropdownMenuLabel className="post-manage-menu-hint">
+              {hint}
+            </DropdownMenuLabel>
+            <DropdownMenuSeparator />
+          </>
+        )}
+
+        {showContent && (
+          <>
+            <DropdownMenuLabel>内容</DropdownMenuLabel>
+            {canEdit && (
+              <DropdownMenuItem onSelect={onEdit}>
+                <Pencil size={14} aria-hidden />
+                编辑
+              </DropdownMenuItem>
+            )}
+            {isOwnerOrAdmin && isEdited && (
+              <DropdownMenuItem onSelect={onShowRevisions}>
+                <History size={14} aria-hidden />
+                编辑历史
+              </DropdownMenuItem>
+            )}
+            {isOwnerOrAdmin && post.post_type === 'question' && (
+              <DropdownMenuItem onSelect={onToggleResolved}>
+                {post.question_resolved
+                  ? <CircleHelp size={14} aria-hidden />
+                  : <CircleCheck size={14} aria-hidden />}
+                {post.question_resolved ? '标为未解决' : '标为已解决'}
+              </DropdownMenuItem>
+            )}
+            {isAdmin && <DropdownMenuSeparator />}
+          </>
+        )}
+
+        {isAdmin && (
+          <>
+            <DropdownMenuLabel>审核</DropdownMenuLabel>
+            {(post.status === 'pending' || post.status === 'rejected') && (
+              <DropdownMenuItem onSelect={onApprove}>
+                <CircleCheck size={14} aria-hidden />
+                通过审核
+              </DropdownMenuItem>
+            )}
+            {post.status !== 'rejected' && (
+              <DropdownMenuItem onSelect={onReject}>
+                <Ban size={14} aria-hidden />
+                拒绝并通知
+              </DropdownMenuItem>
+            )}
+            <DropdownMenuSeparator />
+
+            <DropdownMenuLabel>展示</DropdownMenuLabel>
+            <DropdownMenuItem onSelect={onFeature}>
+              <Sparkles size={14} aria-hidden />
+              {post.featured ? '取消精华' : '设为精华'}
+            </DropdownMenuItem>
+            <DropdownMenuItem onSelect={onPin}>
+              <Pin size={14} aria-hidden />
+              {post.pinned ? '取消全局置顶' : '全局置顶'}
+            </DropdownMenuItem>
+            <DropdownMenuItem onSelect={onBoardPin}>
+              <Pin size={14} aria-hidden />
+              {post.board_pinned ? '取消板块置顶' : '板块置顶'}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+
+            <DropdownMenuLabel>讨论</DropdownMenuLabel>
+            <DropdownMenuItem onSelect={onLock}>
+              <Lock size={14} aria-hidden />
+              {post.edit_locked ? '解锁编辑' : '锁定编辑'}
+            </DropdownMenuItem>
+            <DropdownMenuItem onSelect={onCommentsLock}>
+              {post.comments_locked
+                ? <LockOpen size={14} aria-hidden />
+                : <MessageSquareOff size={14} aria-hidden />}
+              {post.comments_locked ? '开放讨论' : '锁定讨论'}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+
+            <DropdownMenuLabel>危险</DropdownMenuLabel>
+            <DropdownMenuItem
+              className="text-destructive focus:text-destructive"
+              disabled={deleting}
+              onSelect={onDelete}
+            >
+              <Trash2 size={14} aria-hidden />
+              删除
+            </DropdownMenuItem>
+          </>
+        )}
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}