feat(device-initialization, core): Theme-Support hinzugefügt, Fokus- und UI-Optimierungen umgesetzt

Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>

frontend/shells/meldestelle-desktop/src/jvmMain/kotlin/at/mocode/frontend/shell/desktop/DesktopApp.kt

@@ -1,5 +1,6 @@
 package at.mocode.frontend.shell.desktop
 
+import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
@@ -25,7 +26,16 @@ import org.koin.compose.viewmodel.koinViewModel
  */
 @Composable
 fun DesktopApp() {
-  AppTheme {
+  val deviceInitViewModel: at.mocode.frontend.features.device.initialization.presentation.DeviceInitializationViewModel = koinViewModel()
+  val deviceSettings by deviceInitViewModel.uiState.collectAsState()
+
+  val isDark = when(deviceSettings.settings.appTheme) {
+    at.mocode.frontend.features.device.initialization.domain.model.AppThemeSetting.SYSTEM -> isSystemInDarkTheme()
+    at.mocode.frontend.features.device.initialization.domain.model.AppThemeSetting.LIGHT -> false
+    at.mocode.frontend.features.device.initialization.domain.model.AppThemeSetting.DARK -> true
+  }
+
+  AppTheme(darkTheme = isDark) {
     Surface(
       modifier = Modifier.fillMaxSize(),
       color = MaterialTheme.colorScheme.background,

frontend/shells/meldestelle-desktop/src/jvmMain/kotlin/at/mocode/frontend/shell/desktop/screens/layout/components/ContentArea.kt

@@ -66,17 +66,19 @@ fun DesktopContentArea(
     // DeviceInitialization (Geräte-Setup)
     is AppScreen.DeviceInitialization -> {
       println("[Screen] Rendering DeviceInitialization")
-      val viewModel = koinViewModel<DeviceInitializationViewModel> {
-        parametersOf({ finalSettings: DeviceInitializationSettings ->
+      val viewModel = koinViewModel<DeviceInitializationViewModel>()
+
+      LaunchedEffect(viewModel) {
+        viewModel.initializationCompleteEvent.collect { finalSettings ->
           DeviceInitializationSettingsManager.saveSettings(finalSettings)
           // Vision_04: Sicherheitsschlüssel als Token setzen, damit Cloud-Suche funktioniert
           val authTokenManager = org.koin.core.context.GlobalContext.get().get<AuthTokenManager>()
           authTokenManager.setToken(finalSettings.sharedKey)
           onSettingsChange(finalSettings)
-          // nav.navigateToScreen(...) wird hier nicht direkt gerufen, sondern onNavigate
           onNavigate(AppScreen.EventVerwaltung)
-        })
+        }
       }
+
       DeviceInitializationScreen(viewModel = viewModel)
     }