feat: 管理菜单增加「用户排行榜」入口

侧边栏综合管理与右上角工作区下拉菜单新增「用户排行榜」(admin only)，
指向 /page/strategy/admin/user-leaderboard，并默认展开综合管理分组。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/components/workspace/workspace-nav-menu.tsx

@@ -17,6 +17,7 @@ import {
   ShieldCheckIcon,
   SparklesIcon,
   TagsIcon,
+  TrophyIcon,
   UsersIcon,
 } from "lucide-react";
 import { useEffect, useState } from "react";
@@ -206,6 +207,16 @@ export function WorkspaceNavMenu() {
                       用户中心
                     </DropdownMenuItem>
                   )}
+                  {isAdmin && (
+                    <DropdownMenuItem
+                      onClick={() =>
+                        navigate("/page/strategy/admin/user-leaderboard")
+                      }
+                    >
+                      <TrophyIcon />
+                      用户排行榜
+                    </DropdownMenuItem>
+                  )}
                   {isAdmin && (
                     <DropdownMenuItem
                       onClick={() =>

frontend-web/src/core/page-layout/sidebar-menu.ts

@@ -35,6 +35,7 @@ import {
   ShieldCheck,
   Sparkles,
   Target,
+  Trophy,
   Users,
 } from "lucide-react";
 
@@ -250,6 +251,13 @@ export const sidebarMenuItems: MenuItem[] = [
         path: "/page/strategy/admin/users",
         adminOnly: true,
       },
+      {
+        id: "mgmt-user-leaderboard",
+        label: "用户排行榜",
+        icon: Trophy,
+        path: "/page/strategy/admin/user-leaderboard",
+        adminOnly: true,
+      },
       {
         id: "mgmt-admin-scheduled-tasks",
         label: "定时任务管理",
@@ -300,6 +308,7 @@ export const defaultExpandedIds: ReadonlySet<string> = new Set([
   "light-app-note-management",
   "task-management",
   "xk-center-task",
+  "comprehensive-management",
 ]);
 
 /** 按 admin 角色过滤菜单：非 admin 不展示 ``adminOnly: true`` 的项及其子项 */