toHumanShort method
Formats the duration as a short human-readable string (e.g., "1h 3m 4s").
Implementation
String toHumanShort() {
final isNegative = this.isNegative;
final duration = abs();
final parts = <String>[];
final days = duration.inDays;
final hours = duration.inHours.remainder(24);
final minutes = duration.inMinutes.remainder(60);
final seconds = duration.inSeconds.remainder(60);
if (days > 0) parts.add('${days}d');
if (hours > 0) parts.add('${hours}h');
if (minutes > 0) parts.add('${minutes}m');
if (seconds > 0 || parts.isEmpty) parts.add('${seconds}s');
final value = parts.join(' ');
return isNegative ? '-$value' : value;
}