feat: 交付官方 Docker 运行时，外观改背景图并下线自定义 CSS/JS

站点/后台分轨背景与用户列表排序一并落地；生产 CORS 改走 SITE_URL，健康检查带版本号。

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

frontend/components/StaffUserMenu.tsx

@@ -32,6 +32,9 @@ export interface StaffUserTarget {
   board_ids?: number[];
   /** 有权访客资料接口下发；未知时按未封禁处理 */
   banned?: boolean;
+  avatar?: string;
+  created_at?: string;
+  points?: number;
 }
 
 /**
@@ -127,6 +130,9 @@ export default function StaffUserMenu({
     role: target.role,
     board_ids: target.board_ids,
     banned,
+    avatar: target.avatar,
+    created_at: target.created_at,
+    points: target.points,
   };
 
   const itemCls =