隐藏后台侧边栏中的司机管理入口

司机操作台属于订单履约环节，不属于主数据档案管理；且当前无司机员工
CRUD 功能，放在导航中容易引起歧义。路由和页面文件保留，可直接访问。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/web-admin/src/App.vue

@@ -107,7 +107,6 @@ const navGroups = [
           { to: "/customers", label: "客户管理" },
           { to: "/master-data", label: "基础资料" },
           { to: "/pricing-rules", label: "定价规则" },
-          { to: "/driver/tasks", label: "司机管理" },
         ],
       },
     ],