formatTime static method
Implementation
static String formatTime(int? timestamp) {
if (timestamp == null) return '';
final time = DateTime.fromMillisecondsSinceEpoch(timestamp);
final hour = time.hour > 12 ? time.hour - 12 : (time.hour == 0 ? 12 : time.hour);
final period = time.hour >= 12 ? 'PM' : 'AM';
return '$hour:${time.minute.toString().padLeft(2, '0')} $period';
}