单位转换方法

const formatSizeUnits=(kb)=> {
    let units = ['KB', 'MB', 'GB', 'TB', 'PB'];
    let unitIndex = 0;

    while (kb >= 1024 && unitIndex < units.length - 1) {
        kb /= 1024;
        unitIndex++;
    }

    return `${kb.toFixed(2)} ${units[unitIndex]}`;
}