feat: WC2026 赛事 seed、生产上线初始化脚本与目录归档

重构 seed 为 WC2026 72 场小组赛与 48 强优胜盘；新增 production 模式仅保留 admin 与赛事示例；提供 prod-init-db 全量重置脚本；管理端 i18n 分包与赛事归档能力。

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

apps/admin/src/composables/useAdminLocale.ts

@@ -5,6 +5,7 @@ import {
   type AdminLocale,
 } from '../i18n/admin-messages';
 import { ADMIN_LOCALE_STORAGE_KEY } from '../i18n';
+import { preloadAdminLocale } from '../i18n/locale-loader';
 import { resolveAdminMessage } from '../i18n/resolve-message';
 
 export type { AdminLocale };
@@ -24,7 +25,8 @@ export function useAdminLocale() {
     );
   }
 
-  function setLocale(code: AdminLocale) {
+  async function setLocale(code: AdminLocale) {
+    await preloadAdminLocale(code);
     locale.value = code;
     localStorage.setItem(ADMIN_LOCALE_STORAGE_KEY, code);
     document.cookie = `${ADMIN_LOCALE_STORAGE_KEY}=${encodeURIComponent(code)};path=/;max-age=31536000;SameSite=Lax`;