feat: 管理端 RBAC 权限体系与员工管理

新增多角色权限控制（赛事/财务/客服管理员），支持员工 CRUD、路由菜单按权限显隐、审计日志范围过滤；登录返回角色与权限列表。玩家端赛事列表增加静默刷新避免图片闪烁。Seed 补充演示员工账号与充值相关权限。附带 RBAC/审计范围单元测试及 UAT 文档更新。

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

apps/player/src/layouts/MainLayout.vue

@@ -144,7 +144,7 @@ watch(
 
     <main ref="mainRef" :class="['main', { 'has-nav': showBottomNav }]">
       <RouterView v-slot="{ Component, route: viewRoute }">
-        <KeepAlive v-if="viewRoute.meta.keepAlive" :max="3">
+        <KeepAlive v-if="viewRoute.meta.keepAlive" :max="10">
           <component :is="Component" :key="viewRoute.path" />
         </KeepAlive>
         <component v-else :is="Component" :key="viewRoute.fullPath" />