export declare const getCookieByName: (name: string) => string | null;
/**
 * 将毫秒耗时格式化为紧凑字符串（数字与单位之间不留空格）
 * @param duration 耗时，单位：毫秒
 * @returns 如 1m30s500ms；与 formatElapsedTime 风格一致
 */
export declare const formatDuration: (duration: number) => string;
export declare const generateUUID: () => string;
export declare const formatElapsedTime: (seconds: number) => string;