feat(i18n): 管理端与玩家端三语支持（中/英/马来语）

- 管理后台 adminT 文案库、结算与代理端页面、表单校验
- 玩家端 vue-i18n 补全首页/公告/串关与 ms 文案
- Element Plus ms 语言包与共享 locale 工具

apps/player/src/stores/auth.ts

@@ -4,7 +4,9 @@ import api from '../api';
 
 export const useAuthStore = defineStore('auth', () => {
   const token = ref(localStorage.getItem('token') || '');
-  const user = ref(JSON.parse(localStorage.getItem('user') || 'null'));
+  const user = ref<{ id?: string; username?: string; locale?: string } | null>(
+    JSON.parse(localStorage.getItem('user') || 'null'),
+  );
 
   async function login(username: string, password: string) {
     const { data } = await api.post('/player/auth/login', { username, password });