feat: 新增用车需求服务及线索管理全功能

- 新增后台用车服务配置模块，支持维护服务简介、优势与使用流程
- 新增需求线索管理页面，支持筛选、查看与更新用车线索状态
- 新增小程序用车需求页面，优化登录路径与回跳逻辑
- 优化车型卡片跳转与用车需求提交功能
- 新增服务端API与数据处理逻辑，完善权限校验
- 更新全站配置与API文档，新增相关测试用例

WonderQ-Admin-UI/src/components/admin/AdminShell.tsx

@@ -1,5 +1,5 @@
 import { useMemo, useState } from "react";
-import { Headset, Home, List, LogOut } from "lucide-react";
+import { ClipboardList, Headset, Home, List, LogOut } from "lucide-react";
 
 import { clearToken } from "@/api";
 import { ToastStack } from "@/components/admin/ToastStack";
@@ -7,6 +7,7 @@ import { Button } from "@/components/ui/button";
 import { ConciergePage } from "@/pages/structure/ConciergePage";
 import { HomePage } from "@/pages/structure/HomePage";
 import { WanfaPage } from "@/pages/structure/WanfaPage";
+import { LeadsPage } from "@/pages/leads/LeadsPage";
 import type { Tab, Toast } from "@/types/admin";
 
 const sidebarGroups: {
@@ -21,6 +22,7 @@ const sidebarGroups: {
       { id: "home", label: "首页", icon: Home, description: "" },
       { id: "play", label: "玩法", icon: List, description: "" },
       { id: "butler", label: "管家", icon: Headset, description: "" },
+      { id: "leads", label: "需求线索", icon: ClipboardList, description: "" },
     ],
   },
 ];
@@ -118,6 +120,8 @@ export function AdminShell({ onLogout }: { onLogout: () => void }) {
           <WanfaPage key="wanfa-page" notify={notify} />
         ) : activeTab === "butler" ? (
           <ConciergePage key="concierge-page" notify={notify} />
+        ) : activeTab === "leads" ? (
+          <LeadsPage key="leads-page" notify={notify} />
         ) : null}
       </section>
       <ToastStack