chore: 去掉未上线前的旧兼容垫片，板块流收口到首页

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

frontend/components/Header.tsx

@@ -20,7 +20,6 @@ import {
   ChevronDown,
   ShieldCheck,
   MessageSquare,
-  LayoutGrid,
 } from "lucide-react";
 import { apiLogout, apiMe, apiChatUnreadSummary, type User } from "@/lib/api";
 import { hasAuthCookieHint } from "@/lib/cookies";
@@ -87,8 +86,8 @@ export default function Header({
       });
   }), [router]);
 
-  // 挂载后静默校正一次（仅一次）：覆盖 SSR 期间后端不可用、旧 Path refresh
-  // 半登录等边缘情况。正常 F5 下结果与 SSR 一致，不产生可见闪动；
+  // 挂载后静默校正一次（仅一次）：覆盖 SSR 期间后端不可用等边缘情况。
+  // 正常 F5 下结果与 SSR 一致，不产生可见闪动；
   // 无可读 CSRF cookie 说明必然是游客，跳过请求
   useEffect(() => {
     if (!hasAuthCookieHint()) return;
@@ -238,13 +237,6 @@ export default function Header({
             <NavPill href="/" active={pathname === "/"} icon={<Home size={15} />}>
               首页
             </NavPill>
-            <NavPill
-              href="/boards"
-              active={pathname === "/boards" || pathname?.startsWith("/board/") === true}
-              icon={<LayoutGrid size={15} />}
-            >
-              板块
-            </NavPill>
           </nav>
         </div>
 
@@ -378,12 +370,6 @@ export default function Header({
           </form>
           <div className="flex flex-col">
             <MobileLink href="/" active={pathname === "/"}>首页</MobileLink>
-            <MobileLink
-              href="/boards"
-              active={pathname === "/boards" || pathname?.startsWith("/board/") === true}
-            >
-              板块
-            </MobileLink>
             {user && <MobileLink href="/compose">发帖</MobileLink>}
             {user && (
               <MobileLink href="/chat" active={pathname?.startsWith("/chat") ?? false}>

frontend/components/PostRow.tsx

@@ -91,7 +91,7 @@ export default function PostRow({
           }`}
         >
           {boardHref && (
-            <Link href={`/board/${post.board.id}`} className="j13-board-tag">
+            <Link href={`/?board=${post.board.id}`} className="j13-board-tag">
               {post.board.name}
             </Link>
           )}

frontend/components/ThemeSync.tsx

@@ -26,7 +26,7 @@ export default function ThemeSync({ initialAccent }: { initialAccent: string })
 
   useEffect(() => {
     // 外观设置页存在"未保存的本地实时预览"，该页面内暂停同步，
-    // 避免轮询结果覆盖管理员正在预览的颜色；离开页面后 effect 重跑立即对齐
+    // 避免 HTTP 校准覆盖管理员正在预览的颜色；离开页面后 effect 重跑立即对齐
     if (pathname?.startsWith("/admin/appearance")) return;
 
     let cancelled = false;

frontend/components/home/BoardPanels.tsx

@@ -0,0 +1,307 @@
+import Link from "next/link";
+import {
+  Flame,
+  Users,
+  MessageCircle,
+  Heart,
+  Shield,
+  LayoutGrid,
+  PenLine,
+  PenSquare,
+  BarChart3,
+  TrendingUp,
+} from "lucide-react";
+import type {
+  PostListItem,
+  ActiveUser,
+  BoardWithCount,
+  BoardModerator,
+  BoardSidebarStats,
+  CheckinStatus,
+} from "@/lib/api";
+import Avatar from "@/components/Avatar";
+import { PulseCheckin } from "./CheckinCard";
+import { formatCompact } from "@/lib/format";
+
+/* ---------- 1. 板块管理员 ---------- */
+
+function Moderators({ items }: { items: BoardModerator[] }) {
+  return (
+    <section className="j13-module" aria-label="板块管理员">
+      <p className="j13-module-title mb-2">
+        <Shield size={15} style={{ color: "var(--accent)" }} /> 板块管理员
+      </p>
+      {items.length === 0 ? (
+        <p className="meta px-0.5 py-1.5">暂无板块管理员</p>
+      ) : (
+        <ul className="space-y-0.5">
+          {items.map((u) => {
+            const name = u.nickname || u.username;
+            return (
+              <li key={u.id}>
+                <Link href={`/u/${u.id}`} className="j13-raillink" data-tip={name}>
+                  <Avatar name={name} src={u.avatar || undefined} size={30} />
+                  <span className="min-w-0 flex-1 truncate text-[13px] font-medium" style={{ color: "var(--ink)" }}>
+                    {name}
+                  </span>
+                </Link>
+              </li>
+            );
+          })}
+        </ul>
+      )}
+    </section>
+  );
+}
+
+/* ---------- 2. 板块概况 ---------- */
+
+function BoardIntro({ board }: { board: BoardWithCount }) {
+  return (
+    <section className="j13-module" aria-label="板块概况">
+      <p className="j13-module-title mb-2">
+        <LayoutGrid size={15} style={{ color: "var(--accent)" }} /> 板块概况
+      </p>
+      <p className="text-[15px] font-medium leading-snug" style={{ color: "var(--ink)" }}>
+        {board.name}
+      </p>
+      {board.description ? (
+        <p className="meta mt-1.5 text-[12.5px] leading-relaxed line-clamp-3">{board.description}</p>
+      ) : (
+        <p className="meta mt-1.5">暂无板块介绍</p>
+      )}
+      <p className="meta mt-2 tabular-nums">讨论 {formatCompact(board.post_count)} 篇</p>
+      <div className="mt-3">
+        <Link href={`/compose?board=${board.id}`} className="btn btn-primary btn-sm w-full justify-center">
+          <PenSquare size={14} /> 在此发帖
+        </Link>
+      </div>
+    </section>
+  );
+}
+
+/* ---------- 3. 板块数据 + 签到 ---------- */
+
+function BoardPulse({
+  stats,
+  checkin,
+}: {
+  stats: BoardSidebarStats;
+  checkin?: CheckinStatus | null;
+}) {
+  const cells = [
+    {
+      icon: <PenLine size={12.5} />,
+      label: "话题总数",
+      value: formatCompact(stats.post_count),
+      foot: `+${formatCompact(stats.today_posts)} 今日`,
+      up: true,
+    },
+    {
+      icon: <TrendingUp size={12.5} />,
+      label: "今日新帖",
+      value: formatCompact(stats.today_posts),
+      foot: "本日新增",
+      up: stats.today_posts > 0,
+    },
+    {
+      icon: <MessageCircle size={12.5} />,
+      label: "回复总数",
+      value: formatCompact(stats.comment_count),
+      foot: `+${formatCompact(stats.today_comments)} 今日`,
+      up: true,
+    },
+    {
+      icon: <Heart size={12.5} />,
+      label: "今日回复",
+      value: formatCompact(stats.today_comments),
+      foot: "本日新增",
+      up: stats.today_comments > 0,
+    },
+  ];
+  return (
+    <section className="j13-module" aria-label="板块数据">
+      <p className="j13-module-title">
+        <BarChart3 size={15} style={{ color: "var(--accent)" }} /> 板块数据
+      </p>
+      <div className="j13-pulse">
+        {cells.map((c) => (
+          <div key={c.label} className="j13-pulse-cell">
+            <p className="j13-pulse-lab">
+              <span style={{ color: "var(--accent)" }} aria-hidden="true">
+                {c.icon}
+              </span>
+              {c.label}
+            </p>
+            <p className="j13-pulse-num">{c.value}</p>
+            <p className={`j13-pulse-foot${c.up ? " is-up" : ""}`}>
+              {c.up && <TrendingUp size={10.5} aria-hidden="true" />}
+              {c.foot}
+            </p>
+          </div>
+        ))}
+      </div>
+      <div className="j13-pulse-checkin">
+        <PulseCheckin initial={checkin} />
+      </div>
+    </section>
+  );
+}
+
+/* ---------- 4. 本板热门 ---------- */
+
+function BoardHot({ posts }: { posts: PostListItem[] }) {
+  return (
+    <section className="j13-module" aria-label="本板热门">
+      <p className="j13-module-title mb-1.5">
+        <Flame size={15} style={{ color: "var(--clay)" }} /> 本板热门
+      </p>
+      {posts.length === 0 ? (
+        <p className="meta px-1.5 py-3">本板还没有热门讨论</p>
+      ) : (
+        <ol className="j13-ranklist">
+          {posts.map((p, i) => (
+            <li key={p.id}>
+              <Link href={`/post/${p.id}`} className="j13-rank group" data-tip={p.title}>
+                <span className="j13-rank-no">{i + 1}</span>
+                <span className="min-w-0 flex-1">
+                  <span
+                    className="block truncate text-[13px] font-medium leading-snug transition-colors group-hover:text-[var(--accent)]"
+                    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>
+      )}
+    </section>
+  );
+}
+
+/* ---------- 5. 本板活跃 ---------- */
+
+function BoardActive({ users }: { users: ActiveUser[] }) {
+  return (
+    <section className="j13-module" aria-label="本板活跃成员">
+      <p className="j13-module-title mb-2">
+        <Users size={15} style={{ color: "var(--accent)" }} /> 本板活跃
+        <span
+          className="ml-auto font-normal normal-case tracking-normal text-[11px]"
+          style={{ color: "var(--ink-3)" }}
+        >
+          本周
+        </span>
+      </p>
+      {users.length === 0 ? (
+        <p className="meta px-1.5 py-2">本周本板还没有人互动</p>
+      ) : (
+        <ul className="space-y-0.5">
+          {users.map((u) => {
+            const name = u.nickname || u.username;
+            return (
+              <li key={u.id}>
+                <Link href={`/u/${u.id}`} className="j13-raillink" data-tip={name}>
+                  <Avatar name={name} src={u.avatar || undefined} size={30} />
+                  <span className="flex-1 min-w-0">
+                    <span
+                      className="block truncate text-[13px] font-medium leading-tight"
+                      style={{ color: "var(--ink)" }}
+                    >
+                      {name}
+                    </span>
+                    <span className="mt-px flex items-center gap-2.5 text-[11px] meta">
+                      <span className="inline-flex items-center gap-1">
+                        <PenLine size={10.5} /> 发帖 {u.post_count}
+                      </span>
+                      <span className="inline-flex items-center gap-1">
+                        <MessageCircle size={10.5} /> 回复 {u.comment_count}
+                      </span>
+                    </span>
+                  </span>
+                  <span
+                    className="shrink-0 text-[13px] tabular-nums"
+                    style={{ color: "var(--accent)" }}
+                    aria-label={`本周共 ${u.post_count + u.comment_count} 次互动`}
+                  >
+                    {u.post_count + u.comment_count}
+                  </span>
+                </Link>
+              </li>
+            );
+          })}
+        </ul>
+      )}
+    </section>
+  );
+}
+
+/* ---------- 装配 ---------- */
+
+type BoardPanelsProps = {
+  board: BoardWithCount;
+  moderators: BoardModerator[];
+  stats: BoardSidebarStats;
+  hot: PostListItem[];
+  activeUsers: ActiveUser[];
+  checkin?: CheckinStatus | null;
+};
+
+function BoardPanelsBody(props: BoardPanelsProps) {
+  return (
+    <>
+      <Moderators items={props.moderators} />
+      <BoardIntro board={props.board} />
+      <BoardPulse stats={props.stats} checkin={props.checkin} />
+      <BoardHot posts={props.hot} />
+      <BoardActive users={props.activeUsers} />
+    </>
+  );
+}
+
+export function BoardPanels(props: BoardPanelsProps) {
+  return (
+    <aside className="hidden w-[280px] shrink-0 lg:block xl:w-[300px]" aria-label="板块面板">
+      <div className="sticky top-24 space-y-4">
+        <BoardPanelsBody {...props} />
+      </div>
+    </aside>
+  );
+}
+
+export function BoardPanelsMobile(props: BoardPanelsProps) {
+  return (
+    <div className="space-y-4 lg:hidden" aria-label="板块面板">
+      <BoardPanelsBody {...props} />
+    </div>
+  );
+}
+
+/** 板块不存在时的简卡 */
+export function BoardMissingPanel() {
+  return (
+    <aside className="hidden w-[280px] shrink-0 lg:block xl:w-[300px]" aria-label="板块面板">
+      <div className="sticky top-24">
+        <section className="j13-module">
+          <p className="j13-module-title mb-2">
+            <LayoutGrid size={15} style={{ color: "var(--ink-3)" }} /> 板块
+          </p>
+          <p className="meta">板块不存在或已删除</p>
+          <Link href="/" className="btn btn-line btn-sm mt-3 w-full justify-center">
+            返回全部讨论
+          </Link>
+        </section>
+      </div>
+    </aside>
+  );
+}

frontend/components/home/WorkspaceNav.tsx

@@ -2,7 +2,7 @@
 
 import Link from "next/link";
 import { useSearchParams } from "next/navigation";
-import { PenSquare, Home, ChevronRight } 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
@@ -34,26 +34,14 @@ export function WorkspaceNav({ boards }: { boards: BoardWithCount[]; user?: User
           </Link>
         </div>
 
-        {/* 板块目录：标题可点击进入板块汇总列表页（/boards）；
-            下方板块卡片点击不离开工作台，仅在中栏筛选该板块帖子流 */}
+        {/* 板块目录：纯分区标题；下方卡片仅在中栏筛选该板帖子流 */}
         <div>
-          <Link
-            href="/boards"
-            className="group px-1 mb-2 flex items-center justify-between text-[11.5px] font-medium tracking-[0.08em] uppercase text-[var(--ink-3)] hover:text-[var(--accent)] transition-colors"
-            aria-label="进入板块目录列表页"
-          >
-            <span className="flex items-center">
-              <span>板块目录</span>
-              <ChevronRight
-                size={12}
-                className="ml-0.5 opacity-0 -translate-x-0.5 group-hover:opacity-100 group-hover:translate-x-0 transition-all"
-                aria-hidden="true"
-              />
-            </span>
+          <div className="px-1 mb-2 flex items-center justify-between text-[11.5px] font-medium tracking-[0.08em] uppercase text-[var(--ink-3)]">
+            <span>板块目录</span>
             {boards.length > 0 && (
               <span className="tracking-normal tabular-nums">{boards.length} 个</span>
             )}
-          </Link>
+          </div>
           <div className="space-y-2">
             {boards.map((b, i) => (
               <Link