Fix: keep localization state non-null

Author: Velord

data/appstate/src/commonMain/kotlin/com/velord/data/appstate/AppStateDataSource.kt

@@ -33,12 +33,11 @@ class AppStateDataSourceImpl : AppStateDataSource {
 
     override val themeConfigFlow = MutableStateFlow(ThemeConfig.DEFAULT)
 
-    private var mutableLocalizationStateFlow: MutableStateFlow<LocalizationState>? = null
+    private lateinit var mutableLocalizationStateFlow: MutableStateFlow<LocalizationState>
     override val localizationStateFlow: MutableStateFlow<LocalizationState>
-        get() = checkNotNull(mutableLocalizationStateFlow) {
-            "LocalizationState is not initialized"
-        }
-    override val isLocalizationInitialized: Boolean get() = mutableLocalizationStateFlow != null
+        get() = mutableLocalizationStateFlow
+    override val isLocalizationInitialized: Boolean
+        get() = ::mutableLocalizationStateFlow.isInitialized
 
     override val movieRosterFlow = MutableStateFlow<List<Movie>>(emptyList())
     override val movieFavoriteRosterFlow = MutableStateFlow<List<Movie>>(emptyList())
@@ -56,11 +55,10 @@ class AppStateDataSourceImpl : AppStateDataSource {
     override val lastCameraVideoAssetFlow = MutableStateFlow<CameraVideoAsset?>(null)
 
     override fun setLocalizationState(state: LocalizationState) {
-        val stateFlow = mutableLocalizationStateFlow
-        if (stateFlow == null) {
-            mutableLocalizationStateFlow = MutableStateFlow(state)
+        if (isLocalizationInitialized) {
+            mutableLocalizationStateFlow.value = state
         } else {
-            stateFlow.value = state
+            mutableLocalizationStateFlow = MutableStateFlow(state)
         }
     }
 }