Added several tweaks to Settings and RadioControl screens

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarState.kt

@@ -36,7 +36,7 @@ data class RadarState(
     val selectedFrequency: Long? = null
 )
 
-sealed class RadarAction {
-    data class AddToCalendar(val name: String, val aosTime: Long, val losTime: Long) : RadarAction()
-    data class SelectTransmitter(val uuid: String) : RadarAction()
+sealed interface RadarAction {
+    data class AddToCalendar(val name: String, val aosTime: Long, val losTime: Long) : RadarAction
+    data class SelectTransmitter(val uuid: String) : RadarAction
 }

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarViewModel.kt

@@ -174,6 +174,10 @@ class RadarViewModel(
             settingsRepo.rcSettings.value.frequencyState || settingsRepo.rcSettings.value.bluetoothFrequencyState
         _uiState.update { state ->
             if (!isFreqEnabled) {
+                // Skip update if nothing changed
+                if (state.transmitters == transmitters && state.selectedTransmitterUuid == null && state.selectedFrequency == null) {
+                    return@update state
+                }
                 return@update state.copy(
                     transmitters = transmitters,
                     selectedTransmitterUuid = null,
@@ -191,6 +195,10 @@ class RadarViewModel(
                     else -> null
                 }
             }
+            // Skip update if nothing changed
+            if (state.transmitters == transmitters && state.selectedTransmitterUuid == selectedUuid && state.selectedFrequency == freq) {
+                return@update state
+            }
             state.copy(transmitters = transmitters, selectedTransmitterUuid = selectedUuid, selectedFrequency = freq)
         }
     }