humanizeTimezoneFromCoordinates function
Formats timezone from coordinates (simplified).
Implementation
String humanizeTimezoneFromCoordinates(double longitude) {
// Simplified timezone calculation (not accounting for DST or political boundaries)
final offsetHours = (longitude / 15).round();
final sign = offsetHours >= 0 ? '+' : '-';
final absOffset = offsetHours.abs();
return 'UTC$sign${absOffset.toString().padLeft(2, '0')}:00';
}