feat: 用户徽章与等级体系，积分经济管理重构

- 新增徽章系统：badge 服务与 handler、管理端配置页、BadgeChip/LevelBadge 展示组件
- 新增等级模型：model/level 及前端 levels 元数据
- 管理端经济模块拆分为 points/badges/levels 独立页面，EconomySettings 迁入设置
- 积分、签到、评论等服务适配等级与徽章逻辑

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, AtSign, ClipboardList } from "lucide-react";
+import { Heart, MessageCircle, CheckCheck, Bell, CheckCircle2, XCircle, AtSign, ClipboardList, Award } from "lucide-react";
 import { apiMarkRead, apiMarkAllRead, type NotificationsResponse, type NotificationItem } from "@/lib/api";
 
 /**
@@ -20,11 +20,13 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
         list.map((item) => (item.id === n.id ? { ...item, is_read: true } : item))
       );
     }
-    // @提及通知跳到群聊房间；其余跳到帖子/评论
+    // @提及通知跳到群聊房间；徽章通知无关联帖子（仅标已读）；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/content?status=pending");
+    } else if (n.type === "badge") {
+      return;
     } else {
       router.push(`/post/${n.post_id}`);
     }
@@ -84,21 +86,27 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
                     ? <AtSign size={16} />
                     : n.type === "pending_review"
                       ? <ClipboardList size={16} />
-                      : <MessageCircle size={16} />;
+                      : n.type === "badge"
+                        ? <Award size={16} />
+                        : <MessageCircle size={16} />;
             const iconColor = n.type === "approved"
               ? "var(--ok)"
               : n.type === "rejected" || n.type === "deleted"
                 ? "var(--danger)"
                 : n.type === "like"
                   ? "var(--clay)"
-                  : "var(--accent)";
+                  : n.type === "badge"
+                    ? "var(--gold)"
+                    : "var(--accent)";
             const iconBg = n.type === "approved"
               ? "var(--ok-soft)"
               : n.type === "rejected" || n.type === "deleted"
                 ? "var(--danger-soft)"
                 : n.type === "like"
                   ? "var(--clay-soft)"
-                  : "var(--accent-soft)";
+                  : n.type === "badge"
+                    ? "var(--gold-soft)"
+                    : "var(--accent-soft)";
             return (
             <button
               key={n.id}
@@ -145,7 +153,9 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
                                 ? "有新内容待审核"
                                 : n.type === "deleted"
                                   ? "删除了你的帖子"
-                                  : "点赞了你的帖子"}
+                                  : n.type === "badge"
+                                    ? "向你颁布了徽章"
+                                    : "点赞了你的帖子"}
                       </span>
                     </>
                   )}