fix: Oscilloscope Waveform Distortion on FFT Toggle (#3050)

Author: rahul31124

lib/providers/oscilloscope_state_provider.dart

@@ -1048,6 +1048,18 @@ class OscilloscopeStateProvider extends ChangeNotifier {
     notifyListeners();
   }
 
+  void setFourierTransform(bool enabled) {
+    isFourierTransformSelected = enabled;
+
+    if (!enabled) {
+      oscilloscopeAxesScale.setYAxisScaleMax(oscilloscopeAxesScale.yAxisScale);
+      oscilloscopeAxesScale.setYAxisScaleMin(-oscilloscopeAxesScale.yAxisScale);
+      oscilloscopeAxesScale.setXAxisScale(timebase);
+    }
+
+    notifyListeners();
+  }
+
   @override
   void dispose() {
     _monitor = false;

lib/view/widgets/data_analysis_widget.dart

@@ -50,7 +50,7 @@ class _DataAnalysisState extends State<DataAnalysisWidget> {
                               setState(
                                 () {
                                   oscilloscopeStateProvider
-                                      .isFourierTransformSelected = value!;
+                                      .setFourierTransform(value!);
                                 },
                               );
                             },