etm-powersync-app/lib/shared/widgets/hems_icon.dart

import 'package:flutter/material.dart';

/// Icône du cœur HEMS (« Héos ») : étincelle de marque au centre,
/// 4 nœuds pilotés alignés sur les pointes.
class HemsIcon extends StatelessWidget {
  final double size;
  final Color? color;

  const HemsIcon({super.key, this.size = 24, this.color});

  @override
  Widget build(BuildContext context) {
    final c = color ??
        IconTheme.of(context).color ??
        const Color(0xFF28A06A);
    return SizedBox(
      width: size,
      height: size,
      child: CustomPaint(painter: _HemsPainter(c)),
    );
  }
}

class _HemsPainter extends CustomPainter {
  final Color color;
  _HemsPainter(this.color);

  static const _nodes = <Offset>[
    Offset(12, 3.4),
    Offset(20.6, 12),
    Offset(12, 20.6),
    Offset(3.4, 12),
  ];
  static const _nodeR = 1.7;

  @override
  void paint(Canvas canvas, Size size) {
    final s = size.width / 24.0;
    final paint = Paint()
      ..color = color
      ..style = PaintingStyle.fill
      ..isAntiAlias = true;

    final spark = Path()
      ..moveTo(12 * s, 7.4 * s)
      ..lineTo(13.25 * s, 10.75 * s)
      ..lineTo(16.6 * s, 12 * s)
      ..lineTo(13.25 * s, 13.25 * s)
      ..lineTo(12 * s, 16.6 * s)
      ..lineTo(10.75 * s, 13.25 * s)
      ..lineTo(7.4 * s, 12 * s)
      ..lineTo(10.75 * s, 10.75 * s)
      ..close();
    canvas.drawPath(spark, paint);

    for (final n in _nodes) {
      canvas.drawCircle(Offset(n.dx * s, n.dy * s), _nodeR * s, paint);
    }
  }

  @override
  bool shouldRepaint(_HemsPainter old) => old.color != color;
}