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/api/src/shared/common/app-error.ts

@@ -31,6 +31,10 @@ export function appForbidden(code: ApiErrorCode, params?: ApiErrorParams) {
   return new ForbiddenException(body(code, params));
 }
 
+export function appConflict(code: ApiErrorCode, data?: unknown, params?: ApiErrorParams) {
+  return new HttpException({ ...body(code, params), data: data ?? null }, HttpStatus.CONFLICT);
+}
+
 export function appUnauthorized(code: ApiErrorCode, params?: ApiErrorParams) {
   return new UnauthorizedException(body(code, params));
 }