/// Definition of a single sensor — used for bar gauges, pickers, and graph panels.
class SensorDef {
  final String id;
  final String displayName;
  final String unit;
  final double min;
  final double max;

  const SensorDef({
    required this.id,
    required this.displayName,
    required this.unit,
    required this.min,
    required this.max,
  });
}