feat: 新增帖子最后回复展示、文章目录与三栏布局，优化点赞按钮与导航栏

这是一次包含多个功能升级的提交：
1. 后端新增批量查询帖子最后回复的逻辑，在前端帖子列表项中展示最后回复信息
2. 重构点赞按钮，新增文章样式变体并统一样式逻辑
3. 重写工作台导航栏，精简默认展示的菜单选项
4. 新增文章目录组件，为帖子详情页添加文章目录导航
5. 重构帖子详情页，实现三栏响应式布局，新增板块卡片、作者信息栏与同板块热议推荐
6. 重构帖子列表行组件，优化排版与信息展示逻辑
7. 重构帖子管理操作组件，使用下拉菜单整合所有管理功能
8. 新增全局通用的滚动容器与点赞按钮样式

backend/service/post.go

@@ -43,6 +43,20 @@ func toPostListItems(posts []model.Post) []PostListItem {
 	return items
 }
 
+// LastReplyUser 最后回复人（仅列表展示所需字段）
+type LastReplyUser struct {
+	ID       uint   `json:"id"`
+	Username string `json:"username"`
+	Nickname string `json:"nickname"`
+	Avatar   string `json:"avatar"`
+}
+
+// LastReplyInfo 帖子最后一条已发布评论的摘要
+type LastReplyInfo struct {
+	User      LastReplyUser `json:"user"`
+	CreatedAt time.Time     `json:"created_at"`
+}
+
 // PostListItem 帖子列表项（不含正文）
 type PostListItem struct {
 	ID           uint           `json:"id"`
@@ -58,10 +72,73 @@ type PostListItem struct {
 	CommentCount int           `json:"comment_count"`
 	Liked        bool          `json:"liked"`
 	CreatedAt    time.Time     `json:"created_at"`
+	LastReply    *LastReplyInfo `json:"last_reply,omitempty"`
 	Board        model.Board   `json:"board"`
 	User         model.User    `json:"user"`
 }
 
+// fillLastReply 批量填充每帖最后一条已发布评论（发帖人+时间），
+// 单条 SQL 取每帖最新评论，再批量取用户，避免 N+1
+func (s *PostService) fillLastReply(items []PostListItem) {
+	if len(items) == 0 {
+		return
+	}
+	postIDs := make([]uint, 0, len(items))
+	for _, it := range items {
+		postIDs = append(postIDs, it.ID)
+	}
+
+	type latestRow struct {
+		PostID    uint
+		UserID    uint
+		CreatedAt time.Time
+	}
+	var rows []latestRow
+	if err := s.db.Raw(`
+		SELECT DISTINCT ON (post_id) post_id, user_id, created_at
+		FROM comments
+		WHERE post_id IN ? AND status = 'published' AND deleted_at IS NULL
+		ORDER BY post_id, created_at DESC`, postIDs).Scan(&rows).Error; err != nil || len(rows) == 0 {
+		return
+	}
+
+	userIDs := make([]uint, 0, len(rows))
+	seen := map[uint]bool{}
+	for _, r := range rows {
+		if !seen[r.UserID] {
+			seen[r.UserID] = true
+			userIDs = append(userIDs, r.UserID)
+		}
+	}
+	var users []model.User
+	if err := s.db.Select("id, username, nickname, avatar").Where("id IN ?", userIDs).Find(&users).Error; err != nil {
+		return
+	}
+	userMap := make(map[uint]model.User, len(users))
+	for _, u := range users {
+		userMap[u.ID] = u
+	}
+
+	replyMap := make(map[uint]latestRow, len(rows))
+	for _, r := range rows {
+		replyMap[r.PostID] = r
+	}
+	for i := range items {
+		r, ok := replyMap[items[i].ID]
+		if !ok {
+			continue
+		}
+		u, ok := userMap[r.UserID]
+		if !ok {
+			continue
+		}
+		items[i].LastReply = &LastReplyInfo{
+			User:      LastReplyUser{ID: u.ID, Username: u.Username, Nickname: u.Nickname, Avatar: u.Avatar},
+			CreatedAt: r.CreatedAt,
+		}
+	}
+}
+
 // List 获取帖子列表
 func (s *PostService) List(q PostListQuery) ([]PostListItem, int64, error) {
 	if q.Page < 1 {
@@ -104,7 +181,9 @@ func (s *PostService) List(q PostListQuery) ([]PostListItem, int64, error) {
 		return nil, 0, err
 	}
 
-	return toPostListItems(posts), total, nil
+	items := toPostListItems(posts)
+	s.fillLastReply(items)
+	return items, total, nil
 }
 
 // ListByUser 获取指定用户发布的帖子（公开已发布）
@@ -126,7 +205,9 @@ func (s *PostService) ListByUser(userID uint, page, size int) ([]PostListItem, i
 		Preload("Board").Preload("User").Find(&posts).Error; err != nil {
 		return nil, 0, err
 	}
-	return toPostListItems(posts), total, nil
+	items := toPostListItems(posts)
+	s.fillLastReply(items)
+	return items, total, nil
 }
 
 // GetAuthorID 获取帖子作者 ID（不增加浏览量）

frontend/app/globals.css

@@ -253,6 +253,54 @@ h1, h2, h3, h4 {
 
   .btn-sm { padding: 7px 14px; font-size: 13px; }
 
+  /* ----- 点赞按钮：未赞描边态，hover 同色系填充；已赞为浅底实心态 ----- */
+  .j13-like {
+    border-color: var(--line-2);
+    color: var(--ink-2);
+    background: var(--panel);
+    transition:
+      border-color 0.15s ease,
+      color 0.15s ease,
+      background-color 0.15s ease,
+      box-shadow 0.15s ease;
+  }
+  .j13-like svg {
+    transition: transform 0.15s ease;
+  }
+  .j13-like:hover:not(:disabled),
+  .j13-like.is-liked {
+    border-color: var(--accent);
+    color: var(--accent);
+    background: var(--accent-soft);
+  }
+  /* 已赞态 hover 再加深一档，并给同色系投影；心形轻微放大（不改变布局） */
+  .j13-like:hover:not(:disabled) {
+    box-shadow: 0 2px 10px color-mix(in srgb, var(--accent) 22%, transparent);
+  }
+  .j13-like.is-liked:hover:not(:disabled) {
+    background: color-mix(in srgb, var(--accent) 17%, transparent);
+  }
+  .j13-like:hover:not(:disabled) svg {
+    transform: scale(1.15);
+  }
+  .j13-like:active:not(:disabled) svg {
+    transform: scale(0.95);
+  }
+  .j13-like:focus-visible {
+    outline: 2px solid var(--accent);
+    outline-offset: 2px;
+  }
+  @media (prefers-reduced-motion: reduce) {
+    .j13-like,
+    .j13-like svg {
+      transition: none;
+    }
+    .j13-like:hover:not(:disabled) svg,
+    .j13-like:active:not(:disabled) svg {
+      transform: none;
+    }
+  }
+
   /* ----- 表单 ----- */
   .field-label {
     display: block;
@@ -570,6 +618,26 @@ h1, h2, h3, h4 {
     border-color: var(--nav-active-line);
     color: var(--nav-active-ink);
   }
+
+  /* 帖子详情侧栏内的滚动承载区（目录 / 作者帖子列表）：
+     配合栏容器的 max-height 独立滚动，细滚动条、不产生滚动链 */
+  .j13-rail-scroll {
+    min-height: 3.5rem;
+    overflow-y: auto;
+    overscroll-behavior: contain;
+    scrollbar-width: thin;
+  }
+  .j13-rail-scroll::-webkit-scrollbar {
+    width: 6px;
+  }
+  .j13-rail-scroll::-webkit-scrollbar-thumb {
+    background: var(--line-2);
+    border-radius: 99px;
+    border: none;
+  }
+  .j13-rail-scroll::-webkit-scrollbar-track {
+    background: transparent;
+  }
 }
 
 /* ============================================================

frontend/app/post/[id]/page.tsx

@@ -2,15 +2,34 @@ import type { Metadata } from "next";
 import Link from "next/link";
 import { cookies } from "next/headers";
 import ReactMarkdown from "react-markdown";
-import { fetchPostDetail, fetchComments } from "@/lib/api";
+import {
+  Clock,
+  Heart,
+  MessageCircle,
+  Flame,
+  Layers,
+  User,
+  PenLine,
+  ArrowRight,
+  ChevronRight,
+} from "lucide-react";
+import {
+  fetchPostDetail,
+  fetchComments,
+  fetchPosts,
+  fetchUserProfile,
+  type UserProfile,
+  type PostListItem,
+  type Board,
+} from "@/lib/api";
 import { authCookieHeader } from "@/lib/cookies";
 import CommentSection from "@/components/CommentSection";
 import PostActions from "@/components/PostActions";
 import LikeButton from "@/components/LikeButton";
 import ReadingProgress from "@/components/ReadingProgress";
+import PostToc, { type TocItem } from "@/components/PostToc";
 import Avatar from "@/components/Avatar";
 import { IconComment, IconEye } from "@/components/Icons";
-import { ChevronRight } from "lucide-react";
 
 interface PageProps {
   params: Promise<{ id: string }>;
@@ -34,11 +53,285 @@ export async function generateMetadata({ params }: PageProps): Promise<Metadata>
   }
 }
 
+/**
+ * 从 Markdown 提取二三级标题生成目录项，id 按出现顺序编号；
+ * 代码围栏内的 # 不计入
+ */
+function extractToc(content: string): TocItem[] {
+  const items: TocItem[] = [];
+  let inCode = false;
+  for (const raw of content.split(/\r?\n/)) {
+    const line = raw.trim();
+    if (line.startsWith("```")) {
+      inCode = !inCode;
+      continue;
+    }
+    if (inCode) continue;
+    const m = /^(#{2,3})\s+(.+?)\s*#*\s*$/.exec(line);
+    if (m) items.push({ level: m[1].length as 2 | 3, text: m[2], id: `h-${items.length}` });
+  }
+  return items;
+}
+
+function formatYearMonth(dateStr: string) {
+  const d = new Date(dateStr);
+  return `${d.getFullYear()}.${String(d.getMonth() + 1).padStart(2, "0")}`;
+}
+
+function formatYMD(dateStr: string) {
+  const d = new Date(dateStr);
+  return `${d.getFullYear()}.${String(d.getMonth() + 1).padStart(2, "0")}.${String(
+    d.getDate()
+  ).padStart(2, "0")}`;
+}
+
+function formatDateTime(dateStr: string) {
+  return new Date(dateStr).toLocaleString("zh-CN", {
+    year: "numeric",
+    month: "2-digit",
+    day: "2-digit",
+    hour: "2-digit",
+    minute: "2-digit",
+  });
+}
+
+/* ============================================================
+   左栏模块（仅 xl 三栏时展示）
+   ============================================================ */
+
+function BoardCard({ board }: { board: Board }) {
+  const colorIdx = Math.max(0, board.color_index ?? 0) % 8;
+  return (
+    <section className="j13-module shrink-0" aria-labelledby="board-card-title">
+      <p className="j13-module-title mb-3" id="board-card-title">
+        <Layers size={15} style={{ color: "var(--accent)" }} /> 所属板块
+      </p>
+      <Link href={`/board/${board.id}`} className="flex items-center gap-3 group">
+        <span
+          className={`av-${colorIdx} w-11 h-11 rounded-xl flex items-center justify-center text-lg font-extrabold shrink-0`}
+        >
+          {board.name.slice(0, 1)}
+        </span>
+        <span
+          className="font-bold text-[14.5px] truncate group-hover:text-[var(--accent)] transition-colors"
+          style={{ color: "var(--ink)" }}
+        >
+          {board.name}
+        </span>
+      </Link>
+      {board.description && (
+        <p className="mt-2.5 text-[12.5px] leading-relaxed" style={{ color: "var(--ink-3)" }}>
+          {board.description}
+        </p>
+      )}
+      <Link
+        href={`/board/${board.id}`}
+        className="btn btn-line btn-sm w-full justify-center mt-3.5"
+      >
+        进入板块 <ArrowRight size={13} />
+      </Link>
+    </section>
+  );
+}
+
+function AuthorRailCard({ profile }: { profile: UserProfile }) {
+  const u = profile.user;
+  return (
+    <section className="j13-module shrink-0" aria-labelledby="author-card-title">
+      <p className="j13-module-title mb-3" id="author-card-title">
+        <User size={15} style={{ color: "var(--accent)" }} /> 作者
+      </p>
+      <div className="flex items-center gap-3">
+        <Link href={`/u/${u.id}`} className="shrink-0" aria-label={u.nickname}>
+          <Avatar name={u.nickname || u.username} size={48} />
+        </Link>
+        <div className="min-w-0">
+          <Link
+            href={`/u/${u.id}`}
+            className="block font-bold text-[14.5px] truncate hover:text-[var(--accent)] transition-colors"
+            style={{ color: "var(--ink)" }}
+          >
+            {u.nickname}
+          </Link>
+          {u.role === "admin" && (
+            <span
+              className="chip mt-1.5"
+              style={{ background: "var(--accent-soft)", color: "var(--accent)" }}
+            >
+              管理员
+            </span>
+          )}
+        </div>
+      </div>
+      <p className="meta mt-3">{formatYearMonth(u.created_at)} 加入</p>
+      <div className="grid grid-cols-2 gap-2 mt-2.5">
+        <div className="j13-stat">
+          <span className="j13-stat-num">{profile.stats.post_count}</span>
+          <span className="j13-stat-lab">发帖</span>
+        </div>
+        <div className="j13-stat">
+          <span className="j13-stat-num">{profile.stats.comment_count}</span>
+          <span className="j13-stat-lab">评论</span>
+        </div>
+      </div>
+      <Link href={`/u/${u.id}`} className="btn btn-line btn-sm w-full justify-center mt-3.5">
+        访问主页
+      </Link>
+    </section>
+  );
+}
+
+function AuthorPosts({ posts }: { posts: PostListItem[] }) {
+  if (posts.length === 0) return null;
+  return (
+    <section className="j13-module flex min-h-0 flex-col" aria-labelledby="author-posts-title">
+      <p className="j13-module-title mb-1 shrink-0" id="author-posts-title">
+        <PenLine size={15} style={{ color: "var(--accent)" }} /> TA 的其他帖子
+      </p>
+      <ul className="j13-rail-scroll">
+        {posts.map((p) => (
+          <li key={p.id}>
+            <Link
+              href={`/post/${p.id}`}
+              title={p.title}
+              className="block rounded-[10px] px-2 py-2 transition-colors hover:bg-[var(--panel-2)]"
+            >
+              <span
+                className="block text-[13px] font-semibold leading-snug line-clamp-2"
+                style={{ color: "var(--ink)" }}
+              >
+                {p.title}
+              </span>
+              <span className="meta mt-1 block text-[11px]">{formatYMD(p.created_at)}</span>
+            </Link>
+          </li>
+        ))}
+      </ul>
+    </section>
+  );
+}
+
+/* ============================================================
+   右栏模块（lg 起展示；移动端下沉到评论之后）
+   ============================================================ */
+
+function RelatedPosts({
+  posts,
+  boardId,
+  uid = "related",
+}: {
+  posts: PostListItem[];
+  boardId: number;
+  // 右栏与移动端内联实例同时存在，id 必须区分以免 aria-labelledby 指向隐藏副本
+  uid?: string;
+}) {
+  if (posts.length === 0) return null;
+  const titleId = `${uid}-title`;
+  return (
+    <section className="j13-module shrink-0" aria-labelledby={titleId}>
+      <p className="j13-module-title mb-1.5" id={titleId}>
+        <Flame size={15} style={{ color: "var(--clay)" }} /> 同板块热议
+      </p>
+      <ol>
+        {posts.map((p, i) => (
+          <li key={p.id}>
+            <Link href={`/post/${p.id}`} className="j13-rank" title={p.title}>
+              <span className="j13-rank-no">{i + 1}</span>
+              <span className="min-w-0 flex-1">
+                <span
+                  className="block text-[13px] font-semibold leading-snug line-clamp-2"
+                  style={{ color: "var(--ink)" }}
+                >
+                  {p.title}
+                </span>
+                <span className="mt-1 flex items-center gap-2.5 meta text-[11.5px]">
+                  <span className="inline-flex items-center gap-1">
+                    <MessageCircle size={11.5} /> {p.comment_count}
+                  </span>
+                  <span className="inline-flex items-center gap-1">
+                    <Heart size={11.5} /> {p.like_count}
+                  </span>
+                </span>
+              </span>
+            </Link>
+          </li>
+        ))}
+      </ol>
+      <Link
+        href={`/board/${boardId}`}
+        className="j13-raillink justify-center mt-1.5 text-[12.5px] font-semibold"
+        style={{ color: "var(--accent)" }}
+      >
+        查看全部 <ChevronRight size={13} />
+      </Link>
+    </section>
+  );
+}
+
+/* 移动端 / 窄屏作者卡（xl 以下内联在正文与评论之间，替代左栏作者模块） */
+function AuthorCardStacked({ profile }: { profile: UserProfile }) {
+  return (
+    <div className="panel p-5 sm:p-6">
+      <p
+        className="text-[11.5px] font-bold tracking-[0.08em] uppercase mb-3.5"
+        style={{ color: "var(--ink-3)" }}
+      >
+        关于作者
+      </p>
+      <div className="flex items-center gap-4 flex-wrap">
+        <Link href={`/u/${profile.user.id}`} className="shrink-0" aria-label={profile.user.nickname}>
+          <Avatar name={profile.user.nickname || profile.user.username} size={52} />
+        </Link>
+        <div className="min-w-0 flex-1">
+          <div className="flex items-center gap-2 flex-wrap">
+            <Link
+              href={`/u/${profile.user.id}`}
+              className="font-bold text-[15px] hover:text-[var(--accent)] transition-colors"
+              style={{ color: "var(--ink)" }}
+            >
+              {profile.user.nickname}
+            </Link>
+            {profile.user.role === "admin" && (
+              <span
+                className="chip"
+                style={{ background: "var(--accent-soft)", color: "var(--accent)", borderColor: "transparent" }}
+              >
+                管理员
+              </span>
+            )}
+          </div>
+          <p className="meta mt-1">
+            {formatYearMonth(profile.user.created_at)} 加入 · 发帖 {profile.stats.post_count} · 评论{" "}
+            {profile.stats.comment_count}
+          </p>
+        </div>
+        <Link href={`/u/${profile.user.id}`} className="btn btn-line btn-sm shrink-0">
+          访问主页
+        </Link>
+      </div>
+    </div>
+  );
+}
+
 export default async function PostDetailPage({ params }: PageProps) {
   const { id } = await params;
   const cookie = authCookieHeader(await cookies());
   const { post } = await fetchPostDetail(id, cookie);
-  const { comments } = await fetchComments(id);
+
+  // 评论 / 作者资料 / 同板块热议并行拉取；侧栏数据失败一律静默降级，不阻塞正文
+  const [commentsData, profile, relatedData] = await Promise.all([
+    fetchComments(id),
+    fetchUserProfile(String(post.user.id), 1, cookie).catch(() => null),
+    fetchPosts(1, 8, post.board_id, "hot", "", false, cookie).catch(() => null),
+  ]);
+  const comments = commentsData.comments;
+  const related = (relatedData?.posts ?? []).filter((p) => p.id !== post.id).slice(0, 5);
+  const authorPosts = (profile?.posts ?? []).filter((p) => p.id !== post.id).slice(0, 5);
+
+  const toc = extractToc(post.content);
+  const readingMinutes = Math.max(1, Math.ceil(post.content.length / 400));
+  const edited =
+    new Date(post.updated_at).getTime() - new Date(post.created_at).getTime() > 60_000;
 
   const jsonLd = {
     "@context": "https://schema.org",
@@ -56,11 +349,44 @@ export default async function PostDetailPage({ params }: PageProps) {
     },
   };
 
+  // 目录项与 Markdown 标题按渲染顺序一一对应（extractToc 顺序 == 文档顺序）
+  let headingIndex = 0;
+  const headingRenderer = (Tag: "h2" | "h3") =>
+    function Heading({ children }: { children?: React.ReactNode }) {
+      const item = toc[headingIndex++];
       return (
-    <article className="max-w-3xl mx-auto">
+        <Tag id={item?.id} style={{ scrollMarginTop: 90 }}>
+          {children}
+        </Tag>
+      );
+    };
+
+  const tags = post.tags
+    ? [...new Set(post.tags.split(",").map((t) => t.trim()).filter(Boolean))]
+    : [];
+
+  return (
+    <>
       <ReadingProgress />
       <script type="application/ld+json" dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }} />
 
+      {/* 三栏阅读布局：xl = 左导航240 + 正文 + 右辅助280；lg = 正文 + 右辅助260；以下单栏 */}
+      <div className="grid grid-cols-1 items-start lg:grid-cols-[minmax(0,1fr)_260px] xl:grid-cols-[240px_minmax(0,1fr)_280px] gap-x-6 xl:gap-x-7">
+        {/* 左栏：板块 / 作者 / 作者其他帖 */}
+        {/* sticky 必须直接挂在 grid 子项上：aside 作为 grid item，其可粘行程
+            等于行高（正文高度）；内层包裹会被 items-start 缩成内容高而失去行程 */}
+        <aside
+          className="hidden xl:flex w-[240px] shrink-0 sticky top-24 flex-col gap-4 max-h-[calc(100vh_-_7rem)] overflow-hidden"
+          aria-label="帖子导航"
+        >
+          <BoardCard board={post.board} />
+          {profile && <AuthorRailCard profile={profile} />}
+          {profile && <AuthorPosts posts={authorPosts} />}
+        </aside>
+
+        {/* 中栏：正文主体 */}
+        <div className="min-w-0">
+          <article className="w-full max-w-[760px] mx-auto">
             <nav className="meta mb-5 flex items-center gap-1.5 flex-wrap text-[13px]">
               <Link href="/" className="hover:text-[var(--accent)] transition-colors">首页</Link>
               <ChevronRight size={13} />
@@ -69,7 +395,7 @@ export default async function PostDetailPage({ params }: PageProps) {
               </Link>
             </nav>
 
-      <div className="panel p-6 sm:p-9">
+            <div className="panel p-6 sm:p-8">
               <header className="mb-7">
                 <div className="flex items-center gap-2 mb-4 flex-wrap">
                   {post.pinned > 0 && <span className="badge-pin">置顶</span>}
@@ -82,45 +408,51 @@ export default async function PostDetailPage({ params }: PageProps) {
                   {post.title}
                 </h1>
 
+                {/* 作者行：头像 + 昵称居左，点赞/更多操作居右 */}
                 <div
-            className="flex items-center justify-between gap-4 flex-wrap pb-5"
+                  className="flex items-center justify-between gap-4 flex-wrap pb-4"
                   style={{ borderBottom: "1px solid var(--line)" }}
                 >
-            <div className="flex items-center gap-4 flex-wrap">
+                  <div className="flex items-center gap-3 min-w-0">
+                    <Link href={`/u/${post.user.id}`} className="shrink-0" aria-label={post.user.nickname}>
+                      <Avatar name={post.user.nickname || post.user.username} size={40} />
+                    </Link>
                     <Link
                       href={`/u/${post.user.id}`}
-                className="flex items-center gap-2.5 group"
+                      className="min-w-0 truncate text-[15px] font-bold hover:text-[var(--accent)] transition-colors"
+                      style={{ color: "var(--ink)" }}
                     >
-                <Avatar name={post.user.nickname || post.user.username} size={40} />
-                <span className="text-sm font-semibold group-hover:text-[var(--accent)] transition-colors" style={{ color: "var(--ink)" }}>
                       {post.user.nickname}
-                </span>
                     </Link>
-              <span className="meta">{new Date(post.created_at).toLocaleString("zh-CN")}</span>
-              <span className="inline-flex items-center gap-1.5 meta">
-                <IconEye size={14} /> {post.view_count}
-              </span>
-              <span className="inline-flex items-center gap-1.5 meta">
-                <IconComment size={14} /> {post.comment_count}
-              </span>
                   </div>
-            <div className="flex items-center gap-2">
+                  {/* 管理操作已收进单个下拉按钮；普通读者此处不渲染内容 */}
-              <LikeButton postId={id} liked={post.liked} likeCount={post.like_count} />
                   <PostActions postId={id} authorId={post.user.id} pinned={post.pinned} recommended={post.recommended} />
                 </div>
+
+                {/* 元信息条：阅读数据居左、发布/更新时间居右（窄屏自动折行）；
+                    原右栏“帖子数据”卡已移除，点赞数由点赞按钮承载，此处不重复 */}
+                <div className="mt-3.5 flex flex-wrap items-center gap-x-4 gap-y-2">
+                  <div className="flex items-center gap-4 meta">
+                    <span className="inline-flex items-center gap-1.5" aria-label={`浏览 ${post.view_count} 次`}>
+                      <IconEye size={14} /> {post.view_count} 浏览
+                    </span>
+                    <span className="inline-flex items-center gap-1.5" aria-label={`评论 ${post.comment_count} 条`}>
+                      <IconComment size={14} /> {post.comment_count} 评论
+                    </span>
+                    <span className="inline-flex items-center gap-1.5" aria-label={`阅读约需 ${readingMinutes} 分钟`}>
+                      <Clock size={14} /> 约 {readingMinutes} 分钟读完
+                    </span>
+                  </div>
+                  <p className="meta w-full text-[12px] sm:w-auto sm:ml-auto">
+                    发布于 {formatDateTime(post.created_at)}
+                    {edited && <> · 更新于 {formatDateTime(post.updated_at)}</>}
+                  </p>
                 </div>
               </header>
 
-        {post.tags && (
+              {tags.length > 0 && (
                 <div className="flex flex-wrap gap-2 mb-7">
-            {[
+                  {tags.map((t, i) => (
-              ...new Set(
-                post.tags
-                  .split(",")
-                  .map((t) => t.trim())
-                  .filter(Boolean)
-              ),
-            ].map((t, i) => (
                     <span key={`${t}-${i}`} className="chip">
                       # {t}
                     </span>
@@ -129,11 +461,50 @@ export default async function PostDetailPage({ params }: PageProps) {
               )}
 
               <div className="prose-content">
-          <ReactMarkdown>{post.content}</ReactMarkdown>
+                <ReactMarkdown components={{ h2: headingRenderer("h2"), h3: headingRenderer("h3") }}>
+                  {post.content}
+                </ReactMarkdown>
+              </div>
+
+              {/* 文末点赞：分隔线后居中，唯一的点赞入口（作者行不再放置） */}
+              <div
+                className="mt-9 pt-7 flex justify-center"
+                style={{ borderTop: "1px solid var(--line)" }}
+              >
+                <LikeButton
+                  postId={id}
+                  liked={post.liked}
+                  likeCount={post.like_count}
+                  variant="article"
+                />
               </div>
             </div>
 
+            {/* 窄屏作者卡（xl 起由左栏承载，避免重复展示） */}
+            {profile && (
+              <div className="xl:hidden mt-6">
+                <AuthorCardStacked profile={profile} />
+              </div>
+            )}
+
             <CommentSection postId={id} comments={comments} />
+
+            {/* 窄屏相关讨论（lg 起由右栏承载） */}
+            <div className="lg:hidden mt-6">
+              <RelatedPosts posts={related} boardId={post.board_id} uid="related-inline" />
+            </div>
           </article>
+        </div>
+
+        {/* 右栏：目录 / 同板块热议（阅读数据已并入标题下元信息条） */}
+        <aside
+          className="hidden lg:flex w-[260px] xl:w-[280px] shrink-0 sticky top-24 flex-col gap-4 max-h-[calc(100vh_-_7rem)] overflow-hidden"
+          aria-label="阅读辅助"
+        >
+          {toc.length > 0 && <PostToc items={toc} />}
+          <RelatedPosts posts={related} boardId={post.board_id} />
+        </aside>
+      </div>
+    </>
   );
 }

frontend/components/Header.tsx

@@ -142,9 +142,10 @@ export default function Header({
         WebkitBackdropFilter: "blur(14px)",
       }}
     >
-      <div className="max-w-[1440px] mx-auto px-4 sm:px-6 h-[68px] flex items-center justify-between gap-4">
+      <div className="max-w-[1440px] mx-auto px-4 sm:px-6 h-[68px] flex items-center gap-4 lg:gap-7">
-        {/* 品牌 */}
+        {/* 左组：品牌 + 主导航 */}
-        <Link href="/" className="flex items-center gap-2.5 shrink-0 group">
+        <div className="flex items-center gap-3 lg:gap-5 shrink-0">
+          <Link href="/" className="flex items-center gap-2.5 group">
             <span
               className="w-9 h-9 rounded-2xl flex items-center justify-center transition-transform duration-300 group-hover:rotate-[-6deg]"
               style={{ background: "var(--accent)", color: "var(--accent-on)" }}
@@ -162,13 +163,16 @@ export default function Header({
               </span>
             </span>
           </Link>
-
+          <nav className="hidden lg:flex items-center gap-1 pl-3" style={{ borderLeft: "1px solid var(--line)" }}>
-        {/* 桌面端 */}
-        <nav className="hidden lg:flex items-center gap-1">
             <NavPill href="/" active={pathname === "/"} icon={<Home size={14} />}>
               首页
             </NavPill>
-          <form onSubmit={handleSearch} className="relative ml-2">
+          </nav>
+        </div>
+
+        {/* 中组：搜索居中 */}
+        <form onSubmit={handleSearch} className="hidden lg:flex flex-1 justify-center">
+          <div className="relative w-full max-w-[380px] focus-within:max-w-[440px] transition-[max-width] duration-200">
             <Search
               size={15}
               className="absolute left-4 top-1/2 -translate-y-1/2"
@@ -182,7 +186,7 @@ export default function Header({
               onKeyDown={onSearchKeyDown}
               placeholder="搜索帖子..."
               aria-label="搜索帖子"
-              className="w-48 focus:w-64 transition-[width] duration-200 pl-10 pr-10 py-2.5 text-sm rounded-full"
+              className="w-full pl-10 pr-10 py-2.5 text-sm rounded-full"
               style={{
                 background: "var(--panel)",
                 color: "var(--ink)",
@@ -195,8 +199,8 @@ export default function Header({
             >
               /
             </kbd>
+          </div>
         </form>
-        </nav>
 
         {/* 右侧操作区：桌面/移动共用铃铛（仅挂载一次，避免重复轮询），
             桌面额外显示主题/发帖/用户菜单，移动端收进汉堡抽屉 */}

frontend/components/LikeButton.tsx

@@ -10,7 +10,7 @@ interface LikeButtonProps {
   postId: string;
   liked: boolean;
   likeCount: number;
-  variant?: "default" | "compact";
+  variant?: "default" | "compact" | "article";
 }
 
 export default function LikeButton({
@@ -60,10 +60,13 @@ export default function LikeButton({
     }
   };
 
-  const compact =
+  const sizeCls =
     variant === "compact"
       ? "px-2.5 py-1.5 gap-1 text-[12.5px]"
+      : variant === "article"
+        ? "px-7 py-3 gap-2 text-[15px] min-w-[148px]"
         : "px-4 py-2 gap-1.5 text-sm";
+  const iconSize = variant === "compact" ? 13 : variant === "article" ? 18 : 15;
 
   return (
     <button
@@ -71,17 +74,13 @@ export default function LikeButton({
       disabled={loading}
       title={liked ? "取消点赞" : "点赞"}
       aria-pressed={liked}
-      className={`inline-flex items-center font-semibold tabular-nums rounded-full border transition-colors duration-150 hover:border-[var(--accent)] disabled:opacity-50 ${compact}`}
+      className={`j13-like inline-flex items-center justify-center font-semibold tabular-nums rounded-full border disabled:opacity-50 ${liked ? "is-liked" : ""} ${sizeCls}`}
-      style={{
-        borderColor: liked ? "var(--accent)" : "var(--line-2)",
-        color: liked ? "var(--accent)" : "var(--ink-2)",
-        background: liked ? "var(--accent-soft)" : "var(--panel)",
-      }}
     >
       <span key={String(liked)} className={liked ? "j13-heart-pop inline-flex" : "inline-flex"}>
-        <IconHeart size={variant === "compact" ? 13 : 15} filled={liked} />
+        <IconHeart size={iconSize} filled={liked} />
       </span>
       <span>{count}</span>
+      {variant === "article" && <span>{liked ? "已赞" : "点赞"}</span>}
     </button>
   );
 }

frontend/components/PostActions.tsx

@@ -1,9 +1,9 @@
 "use client";
 
-import { useState, useEffect } from "react";
+import { useState, useEffect, useRef } from "react";
 import { useRouter } from "next/navigation";
 import Link from "next/link";
-import { Pencil, Trash2, Pin, Star } from "lucide-react";
+import { Pencil, Trash2, Pin, Star, SlidersHorizontal, ChevronDown, Check } from "lucide-react";
 import { apiMe, apiDeletePost, apiTogglePin, apiToggleRecommend, type User } from "@/lib/api";
 import { toast } from "@/lib/toast";
 
@@ -17,10 +17,12 @@ interface PostActionsProps {
 export default function PostActions({ postId, authorId, pinned, recommended }: PostActionsProps) {
   const router = useRouter();
   const [user, setUser] = useState<User | null>(null);
+  const [open, setOpen] = useState(false);
   const [deleting, setDeleting] = useState(false);
   const [isPinned, setIsPinned] = useState(pinned > 0);
   const [isRecommended, setIsRecommended] = useState(recommended);
   const [acting, setActing] = useState(false);
+  const menuRef = useRef<HTMLDivElement>(null);
 
   useEffect(() => {
     apiMe()
@@ -28,11 +30,28 @@ export default function PostActions({ postId, authorId, pinned, recommended }: P
       .catch(() => setUser(null));
   }, []);
 
+  // 点击外部 / Esc 关闭菜单（与通知铃铛同一交互模式）
+  useEffect(() => {
+    if (!open) return;
+    const onDown = (e: MouseEvent) => {
+      if (menuRef.current && !menuRef.current.contains(e.target as Node)) setOpen(false);
+    };
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") setOpen(false);
+    };
+    document.addEventListener("mousedown", onDown);
+    document.addEventListener("keydown", onKey);
+    return () => {
+      document.removeEventListener("mousedown", onDown);
+      document.removeEventListener("keydown", onKey);
+    };
+  }, [open]);
+
   const canManage = user && (user.id === authorId || user.role === "admin");
   const isAdmin = user?.role === "admin";
-  if (!canManage) return null;
 
   const handleDelete = async () => {
+    setOpen(false);
     if (!confirm("确定要删除这篇帖子吗？此操作不可恢复。")) return;
     setDeleting(true);
     try {
@@ -52,6 +71,7 @@ export default function PostActions({ postId, authorId, pinned, recommended }: P
 
   const handlePin = async () => {
     setActing(true);
+    setOpen(false);
     try {
       const res = await apiTogglePin(postId);
       setIsPinned(res.pinned > 0);
@@ -66,6 +86,7 @@ export default function PostActions({ postId, authorId, pinned, recommended }: P
 
   const handleRecommend = async () => {
     setActing(true);
+    setOpen(false);
     try {
       const res = await apiToggleRecommend(postId);
       setIsRecommended(res.recommended);
@@ -78,38 +99,89 @@ export default function PostActions({ postId, authorId, pinned, recommended }: P
     }
   };
 
+  if (!canManage) return null;
+
+  const itemCls =
+    "w-full flex items-center gap-2.5 px-4 py-2.5 text-[13px] transition-colors hover:bg-[var(--panel-2)]";
+
   return (
-    <div className="flex items-center gap-1.5 flex-wrap">
+    <div className="relative" ref={menuRef}>
+      <button
+        type="button"
+        onClick={() => setOpen((v) => !v)}
+        disabled={acting || deleting}
+        aria-haspopup="menu"
+        aria-expanded={open}
+        className="btn btn-line btn-sm"
+        style={open ? { borderColor: "var(--accent)", color: "var(--accent)" } : undefined}
+      >
+        <SlidersHorizontal size={13} /> 管理
+        <ChevronDown
+          size={13}
+          style={{ transition: "transform .15s", transform: open ? "rotate(180deg)" : "none" }}
+        />
+      </button>
+
+      {open && (
+        <div
+          role="menu"
+          className="absolute right-0 mt-2 w-44 overflow-hidden z-50 j13-toast-in"
+          style={{
+            background: "var(--panel)",
+            border: "1px solid var(--line)",
+            borderRadius: "var(--r)",
+            boxShadow: "var(--shadow-lg)",
+          }}
+        >
           {isAdmin && (
             <>
               <button
+                type="button"
+                role="menuitem"
                 onClick={handlePin}
-            disabled={acting}
+                className={itemCls}
-            className="btn btn-line btn-sm"
+                style={isPinned ? { color: "var(--accent)" } : { color: "var(--ink)" }}
-            style={isPinned ? { borderColor: "var(--accent)", color: "var(--accent)" } : undefined}
               >
-            <Pin size={13} /> {isPinned ? "取消置顶" : "置顶"}
+                <Pin size={14} className="shrink-0" />
+                <span className="flex-1 text-left">{isPinned ? "取消置顶" : "置顶"}</span>
+                {isPinned && <Check size={14} className="shrink-0" />}
               </button>
               <button
+                type="button"
+                role="menuitem"
                 onClick={handleRecommend}
-            disabled={acting}
+                className={itemCls}
-            className="btn btn-line btn-sm"
+                style={isRecommended ? { color: "var(--gold)" } : { color: "var(--ink)" }}
-            style={
-              isRecommended
-                ? { borderColor: "var(--gold)", color: "var(--gold)", background: "var(--gold-soft)" }
-                : undefined
-            }
               >
-            <Star size={13} /> {isRecommended ? "取消推荐" : "推荐"}
+                <Star size={14} className="shrink-0" />
+                <span className="flex-1 text-left">{isRecommended ? "取消推荐" : "推荐"}</span>
+                {isRecommended && <Check size={14} className="shrink-0" />}
               </button>
+              <div style={{ height: 1, background: "var(--line)" }} />
             </>
           )}
-      <Link href={`/post/${postId}/edit`} className="btn btn-line btn-sm">
+          <Link
-        <Pencil size={13} /> 编辑
+            href={`/post/${postId}/edit`}
+            role="menuitem"
+            className={`${itemCls} items-center`}
+            style={{ color: "var(--ink)" }}
+          >
+            <Pencil size={14} className="shrink-0" />
+            <span className="flex-1 text-left">编辑帖子</span>
           </Link>
-      <button onClick={handleDelete} disabled={deleting} className="btn btn-danger btn-sm">
+          <button
-        <Trash2 size={13} /> {deleting ? "删除中..." : "删除"}
+            type="button"
+            role="menuitem"
+            onClick={handleDelete}
+            disabled={deleting}
+            className={`${itemCls} items-center`}
+            style={{ color: "var(--danger)" }}
+          >
+            <Trash2 size={14} className="shrink-0" />
+            <span className="flex-1 text-left">{deleting ? "删除中..." : "删除帖子"}</span>
           </button>
         </div>
+      )}
+    </div>
   );
 }

frontend/components/PostRow.tsx

@@ -1,19 +1,29 @@
 import Link from "next/link";
+import { ArrowLeft } from "lucide-react";
 import type { PostListItem } from "@/lib/api";
 import LikeButton from "./LikeButton";
 import Avatar from "./Avatar";
 import { IconComment, IconEye } from "./Icons";
 
-function formatTime(dateStr: string) {
+/** 发帖/回复时间统一为相对时间：刚刚 / N分钟前 / N小时前 / N天前 / N个月前 / N年前 */
-  const d = new Date(dateStr);
+function formatRelative(dateStr: string) {
-  return `${d.getFullYear()}.${String(d.getMonth() + 1).padStart(2, "0")}.${String(
+  const t = new Date(dateStr).getTime();
-    d.getDate()
+  const diff = Date.now() - t;
-  ).padStart(2, "0")}`;
+  const min = 60_000,
+    hour = 60 * min,
+    day = 24 * hour;
+  if (diff < min) return "刚刚";
+  if (diff < hour) return `${Math.floor(diff / min)}分钟前`;
+  if (diff < day) return `${Math.floor(diff / hour)}小时前`;
+  if (diff < 30 * day) return `${Math.floor(diff / day)}天前`;
+  if (diff < 365 * day) return `${Math.floor(diff / (30 * day))}个月前`;
+  return `${Math.floor(diff / (365 * day))}年前`;
 }
 
 /**
- * 帖子列表行：头像 + 标题 + 作者元信息 + 统计 + 点赞
+ * 帖子列表行（参考社区信息流样式）：
- * 用于首页/板块页，以细线串联，悬浮浅色反馈
+ * 大头像 + 加粗标题（徽章内联）+ 第二行「板块 · 作者 · 发布时间 ← 最后回复」+
+ * 右侧评论数等统计垂直居中。用于首页/板块页/搜索结果。
  */
 export default function PostRow({
   post,
@@ -30,13 +40,16 @@ export default function PostRow({
   showViews?: boolean;
   showLike?: boolean;
 }) {
+  const lastReply = post.last_reply;
+  const replied = lastReply && new Date(lastReply.created_at).getTime() > new Date(post.created_at).getTime() + 60_000;
+
   return (
     <div
-      className="group relative flex items-center gap-3 sm:gap-4 px-4 sm:px-5 border-t transition-colors hover:bg-[var(--panel-2)] j13-fade-up"
+      className="group relative flex items-center gap-3.5 sm:gap-4 px-4 sm:px-5 border-t transition-colors hover:bg-[var(--panel-2)] j13-fade-up"
       style={{
         borderColor: "var(--line)",
-        paddingTop: compact ? 13 : 16,
+        paddingTop: compact ? 15 : 18,
-        paddingBottom: compact ? 13 : 16,
+        paddingBottom: compact ? 15 : 18,
         animationDelay: `${Math.min(index, 9) * 35}ms`,
       }}
     >
@@ -46,57 +59,74 @@ export default function PostRow({
         aria-label={post.user.nickname}
         tabIndex={-1}
       >
-        <Avatar name={post.user.nickname || post.user.username} size={compact ? 38 : 42} />
+        <Avatar name={post.user.nickname || post.user.username} size={compact ? 44 : 46} />
       </Link>
 
       <div className="flex-1 min-w-0">
-        {(post.pinned > 0 || post.recommended) && (
+        <div className="flex items-center gap-2 min-w-0">
-          <div className="flex items-center gap-1.5 mb-1.5 flex-wrap">
+          {post.pinned > 0 && <span className="badge-pin shrink-0">置顶</span>}
-            {post.pinned > 0 && <span className="badge-pin">置顶</span>}
+          {post.recommended && <span className="badge-rec shrink-0">推荐</span>}
-            {post.recommended && <span className="badge-rec">推荐</span>}
+          <Link
-          </div>
+            href={`/post/${post.id}`}
-        )}
+            className="stretch-link min-w-0 flex-1"
-        <Link href={`/post/${post.id}`} className="stretch-link" aria-label={post.title}>
+            aria-label={post.title}
+          >
             <h3
-            className="font-semibold text-[15px] sm:text-[16px] leading-snug truncate transition-colors group-hover:text-[var(--accent)]"
+              className="font-bold text-[16px] sm:text-[17px] leading-snug truncate transition-colors group-hover:text-[var(--accent)]"
               style={{ color: "var(--ink)" }}
             >
               {post.title}
             </h3>
           </Link>
-        <div className="meta relative z-[2] flex items-center gap-2.5 mt-1.5 flex-wrap">
+        </div>
-          <Link
+        <div className="meta relative z-[2] flex items-center gap-x-2 gap-y-1 mt-1.5 flex-wrap text-[13px]">
-            href={`/u/${post.user.id}`}
-            className="hover:text-[var(--accent)] transition-colors"
-          >
-            {post.user.nickname}
-          </Link>
           {boardHref && (
-            <>
-              <span aria-hidden>·</span>
             <Link
               href={`/board/${post.board.id}`}
-                className="hover:text-[var(--accent)] transition-colors"
+              className={`av-${post.board.id % 8} rounded-md px-1.5 py-px text-[11px] font-bold leading-[1.5] transition-opacity hover:opacity-85`}
             >
               {post.board.name}
             </Link>
-            </>
           )}
+          <Link
+            href={`/u/${post.user.id}`}
+            className="font-semibold hover:text-[var(--accent)] transition-colors"
+            style={{ color: "var(--ink-2)" }}
+          >
+            {post.user.nickname}
+          </Link>
           <span aria-hidden>·</span>
-          <span>{formatTime(post.created_at)}</span>
+          <span className="tabular-nums">{formatRelative(post.created_at)}</span>
+          {replied && (
+            <span className="inline-flex items-center gap-1 min-w-0">
+              <ArrowLeft size={13} className="shrink-0" aria-hidden />
+              <Link
+                href={`/u/${lastReply!.user.id}`}
+                className="font-medium hover:text-[var(--accent)] transition-colors truncate max-w-[8em]"
+              >
+                {lastReply!.user.nickname || lastReply!.user.username}
+              </Link>
+              <span className="tabular-nums shrink-0">{formatRelative(lastReply!.created_at)}</span>
+            </span>
+          )}
         </div>
       </div>
 
-      <div className="above-link flex items-center gap-2.5 sm:gap-3.5 shrink-0">
+      <div className="above-link flex items-center gap-3 sm:gap-4 shrink-0">
-        <span
+        <Link
-          className={`${showViews ? "hidden sm:inline-flex" : "inline-flex"} items-center gap-1.5 meta`}
+          href={`/post/${post.id}`}
+          tabIndex={-1}
           aria-label={`${post.comment_count} 条评论`}
+          className={`${showViews ? "hidden sm:inline-flex" : "inline-flex"} items-center gap-1.5 meta tabular-nums text-[13.5px] hover:text-[var(--accent)] transition-colors`}
         >
-          <IconComment size={15} />
+          <IconComment size={17} />
           {post.comment_count}
-        </span>
+        </Link>
         {showViews && (
-          <span className="hidden md:inline-flex items-center gap-1.5 meta" aria-label={`${post.view_count} 次浏览`}>
+          <span
+            className="hidden md:inline-flex items-center gap-1.5 meta tabular-nums"
+            aria-label={`${post.view_count} 次浏览`}
+          >
             <IconEye size={15} />
             {post.view_count}
           </span>

frontend/components/PostToc.tsx

@@ -0,0 +1,93 @@
+"use client";
+
+import { useEffect, useRef, useState } from "react";
+
+export interface TocItem {
+  level: 2 | 3;
+  text: string;
+  id: string;
+}
+
+/**
+ * 文章目录树：右栏 flex 限高列中的可收缩模块。
+ * - 标题常驻，目录列表在超高时于面板内部滚动（细滚动条，不顶出侧栏）；
+ * - IntersectionObserver 高亮当前小节；
+ * - 当前项被滚动到目录可视区外时，列表自动最小化跟随（首屏不滚动、尊重 reduced-motion）。
+ */
+export default function PostToc({ items }: { items: TocItem[] }) {
+  const [active, setActive] = useState<string>(items[0]?.id ?? "");
+  const navRef = useRef<HTMLElement>(null);
+  // 首次挂载时 active 取首项，不触发跟随滚动，避免进页跳动
+  const skipFollow = useRef(true);
+
+  useEffect(() => {
+    const heads = items
+      .map((i) => document.getElementById(i.id))
+      .filter((el): el is HTMLElement => Boolean(el));
+    if (heads.length === 0) return;
+    const obs = new IntersectionObserver(
+      (entries) => {
+        for (const e of entries) if (e.isIntersecting) setActive(e.target.id);
+      },
+      // 顶部让出固定头部高度，底部提前切换到下一节
+      { rootMargin: "-80px 0px -70% 0px", threshold: 0 }
+    );
+    heads.forEach((h) => obs.observe(h));
+    return () => obs.disconnect();
+  }, [items]);
+
+  // active 变化时把当前目录项滚入列表可视区（block: nearest 仅在贴边时最小移动）
+  useEffect(() => {
+    if (skipFollow.current) {
+      skipFollow.current = false;
+      return;
+    }
+    const el = navRef.current?.querySelector<HTMLElement>(`[data-toc-id="${active}"]`);
+    if (!el) return;
+    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
+    el.scrollIntoView({ block: "nearest", behavior: reduce ? "auto" : "smooth" });
+  }, [active]);
+
+  const jump = (id: string) => (e: React.MouseEvent) => {
+    e.preventDefault();
+    document.getElementById(id)?.scrollIntoView({ behavior: "smooth", block: "start" });
+  };
+
+  return (
+    <nav ref={navRef} aria-label="文章目录" className="panel p-4 flex min-h-0 flex-col">
+      <p
+        className="text-[11.5px] font-bold tracking-[0.08em] uppercase mb-2.5 px-1 shrink-0"
+        style={{ color: "var(--ink-3)" }}
+      >
+        目录
+      </p>
+      <ul
+        className="j13-rail-scroll space-y-0.5 pr-0.5"
+        style={{ borderLeft: "1px solid var(--line)" }}
+      >
+        {items.map((it) => {
+          const isActive = it.id === active;
+          return (
+            <li key={it.id}>
+              <a
+                data-toc-id={it.id}
+                href={`#${it.id}`}
+                onClick={jump(it.id)}
+                className="block py-1.5 pr-1 text-[12.5px] leading-snug transition-colors"
+                style={{
+                  paddingLeft: it.level === 3 ? 20 : 12,
+                  marginLeft: -1,
+                  borderLeft: `2px solid ${isActive ? "var(--accent)" : "transparent"}`,
+                  color: isActive ? "var(--accent)" : "var(--ink-2)",
+                  fontWeight: isActive ? 600 : 400,
+                }}
+              >
+                {it.text}
+              </a>
+            </li>
+          );
+        })}
+      </ul>
+    </nav>
+  );
+}

frontend/components/home/WorkspaceNav.tsx

@@ -2,7 +2,7 @@
 
 import Link from "next/link";
 import { useSearchParams } from "next/navigation";
-import { PenSquare, Home, Bell, Settings, LogIn, UserPlus } from "lucide-react";
+import { PenSquare, Home } from "lucide-react";
 import type { BoardWithCount, User } from "@/lib/api";
 
 // 首页壳内板块切换：仅替换中栏帖子流，不离开工作台
@@ -54,28 +54,6 @@ export function WorkspaceNav({ boards, user }: { boards: BoardWithCount[]; user:
             ))}
           </div>
         </div>
-
-        <div style={{ borderTop: "1px solid var(--line)" }} className="pt-3 space-y-0.5">
-          {user ? (
-            <>
-              <Link href="/notifications" className="j13-raillink">
-                <Bell size={16} className="shrink-0" /> 通知中心
-              </Link>
-              <Link href="/settings" className="j13-raillink">
-                <Settings size={16} className="shrink-0" /> 账号设置
-              </Link>
-            </>
-          ) : (
-            <>
-              <Link href="/login" className="j13-raillink">
-                <LogIn size={16} className="shrink-0" /> 登录
-              </Link>
-              <Link href="/register" className="j13-raillink">
-                <UserPlus size={16} className="shrink-0" /> 注册账号
-              </Link>
-            </>
-          )}
-        </div>
       </div>
     </nav>
   );

frontend/lib/api.ts

@@ -84,6 +84,10 @@ export interface PostListItem {
   comment_count: number;
   liked: boolean;
   created_at: string;
+  last_reply?: {
+    user: Pick<User, "id" | "username" | "nickname" | "avatar">;
+    created_at: string;
+  } | null;
   board: Board;
   user: User;
 }