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/notifications/NotificationsClient.tsx

@@ -3,7 +3,7 @@
 import { useState } from "react";
 import { useRouter } from "next/navigation";
 import Link from "next/link";
-import { Heart, MessageCircle, CheckCheck, Bell, CheckCircle2, XCircle } from "lucide-react";
+import { Heart, MessageCircle, CheckCheck, Bell, CheckCircle2, XCircle, AtSign, ClipboardList } from "lucide-react";
 import { apiMarkRead, apiMarkAllRead, type NotificationsResponse, type NotificationItem } from "@/lib/api";
 
 /**
@@ -20,7 +20,14 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
         list.map((item) => (item.id === n.id ? { ...item, is_read: true } : item))
       );
     }
-    router.push(`/post/${n.post_id}`);
+    // @提及通知跳到群聊房间；其余跳到帖子/评论
+    if (n.type === "mention" && n.room_id) {
+      router.push(`/chat/${n.room_id}`);
+    } else if (n.type === "pending_review") {
+      router.push(n.post_id ? `/post/${n.post_id}` : "/admin/moderation");
+    } else {
+      router.push(`/post/${n.post_id}`);
+    }
   };
 
   const handleMarkAll = async () => {
@@ -73,7 +80,11 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
                 ? <XCircle size={16} />
                 : n.type === "like"
                   ? <Heart size={16} />
-                  : <MessageCircle size={16} />;
+                  : n.type === "mention"
+                    ? <AtSign size={16} />
+                    : n.type === "pending_review"
+                      ? <ClipboardList size={16} />
+                      : <MessageCircle size={16} />;
             const iconColor = n.type === "approved"
               ? "var(--ok)"
               : n.type === "rejected"
@@ -128,14 +139,28 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
                           ? "评论了你的帖子"
                           : n.type === "reply"
                             ? "回复了你的评论"
-                            : "点赞了你的帖子"}
+                            : n.type === "mention"
+                              ? "在消息中提到了你"
+                              : n.type === "pending_review"
+                                ? "有新内容待审核"
+                                : "点赞了你的帖子"}
                       </span>
                     </>
                   )}
                 </p>
-                <p className="text-sm mt-1 truncate" style={{ color: "var(--ink-2)" }}>
-                  《{n.post.title}》
-                </p>
+                {n.type === "mention" ? (
+                  n.room && (
+                    <p className="text-sm mt-1 truncate" style={{ color: "var(--ink-2)" }}>
+                      # {n.room.name}
+                    </p>
+                  )
+                ) : (
+                  n.post && (
+                    <p className="text-sm mt-1 truncate" style={{ color: "var(--ink-2)" }}>
+                      《{n.post.title}》
+                    </p>
+                  )
+                )}
                 {n.content && (
                   <p className="text-[13px] mt-1.5 line-clamp-2" style={{ color: "var(--ink-3)" }}>
                     {n.content}