feat: 实时消息与管理端运营能力

新增群聊/私信与公共 WebSocket 总线，站长用户内容档案，并将通知与待审角标改为推送驱动；同步精简管理仪表盘并修复主题换肤 DOM 冲突。

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

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

@@ -4,9 +4,11 @@ import { cookies } from "next/headers";
 import { PenSquare, MessagesSquare, ChevronRight } from "lucide-react";
 import { fetchPosts, fetchBoards } from "@/lib/api";
 import { authCookieHeader } from "@/lib/cookies";
+import { getMeCached } from "@/lib/serverData";
 import Pagination from "@/components/Pagination";
 import PostRow from "@/components/PostRow";
 import PinnedPosts from "@/components/PinnedPosts";
+import FeedNewTip from "@/components/home/FeedNewTip";
 
 interface PageProps {
   params: Promise<{ id: string }>;
@@ -28,12 +30,14 @@ export default async function BoardPage({ params, searchParams }: PageProps) {
   const { page: pageStr } = await searchParams;
   const page = Math.max(1, parseInt(pageStr || "1", 10) || 1);
   const cookie = authCookieHeader(await cookies());
-  const [postsData, boardsData] = await Promise.all([
+  const [postsData, boardsData, me] = await Promise.all([
     fetchPosts(page, 20, Number(id), "latest", "", false, cookie),
     fetchBoards(),
+    getMeCached(cookie || undefined),
   ]);
   const boardIndex = boardsData.boards.findIndex((b) => b.id === Number(id));
   const board = boardIndex >= 0 ? boardsData.boards[boardIndex] : null;
+  const user = me.user;
 
   // 第一页：置顶帖独立成区，列表只保留非置顶
   const pinned = page === 1 ? postsData.posts.filter((p) => p.pinned > 0) : [];
@@ -88,6 +92,16 @@ export default async function BoardPage({ params, searchParams }: PageProps) {
                 <span className="font-bold text-[15px]" style={{ color: "var(--ink)" }}>全部讨论</span>
                 <span className="meta text-xs">第 {page} 页</span>
               </div>
+              {user && (
+                <div className="pt-2.5">
+                  <FeedNewTip
+                    sort="latest"
+                    boardId={Number(id)}
+                    page={page}
+                    userId={user.id}
+                  />
+                </div>
+              )}
               {rows.map((post, i) => (
                 <PostRow key={post.id} post={post} index={i} />
               ))}