msp over wifi implemented

app/lib/transport/flight_controller_link.dart

@@ -23,6 +23,7 @@ class TelemetryFrame {
     required this.lon,
     required this.altitudeM,
     required this.speedMs,
+    required this.headingDeg,
     required this.armed,
     this.activeWaypointIndex,
   });
@@ -31,6 +32,10 @@ class TelemetryFrame {
   final double lon;
   final double altitudeM;
   final double speedMs;
+
+  /// Kurs ueber Grund in Grad (0 = Norden, im Uhrzeigersinn) - dreht den
+  /// Drohnen-Marker (Doku 3.10, [DroneMarkerIcon]).
+  final double headingDeg;
   final bool armed;
   final int? activeWaypointIndex;
 }