feat(admin): 从已有玩家升级代理、修复 i18n 与过期 .js 冲突

- 新建一级代理改为选择已有玩家；新建用户可选一级代理

- 操作日志/注单等扁平 key 翻译；清理 src 内误生成 .js，Vite 优先解析 .ts

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

apps/admin/src/i18n/index.ts

@@ -0,0 +1,19 @@
+import { createI18n } from 'vue-i18n';
+import { adminMessages, type AdminLocale } from './admin-messages';
+
+export const ADMIN_LOCALE_STORAGE_KEY = 'admin_locale';
+
+const saved = (localStorage.getItem(ADMIN_LOCALE_STORAGE_KEY) as AdminLocale) || 'zh-CN';
+
+export const i18n = createI18n({
+  legacy: false,
+  locale: saved,
+  fallbackLocale: ['en-US', 'zh-CN'],
+  messages: adminMessages,
+});
+
+export function getAdminLocale(): AdminLocale {
+  return i18n.global.locale.value as AdminLocale;
+}
+
+export default i18n;