/**
 * Load translation files from the project `locales/` directory once.
 * Locale subdirectories (`locales/de.yml`, `locales/en.yml`, …) are detected
 * automatically by `loadFromDirectory`.
 */
export declare function ensureLocalesLoaded(): Promise<void>;
/**
 * Resolve the active locale for an HTTP request.
 * Order: STX locale prefix (`/en/...`), `?locale=`, `locale` cookie,
 * Accept-Language, then `config.app.locale`.
 */
export declare function resolveRequestLocale(request?: Request): string;
/** Load `locales/` and activate the global translator for this request. */
export declare function applyRequestLocale(request?: Request): Promise<string>;