feat: aktiviere neues EventWizardScreen-Scaffold hinter Feature-Flag

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

frontend/features/veranstaltung-feature/src/jvmMain/kotlin/at/mocode/veranstaltung/feature/presentation/EventWizardScreen.kt

@@ -17,6 +17,9 @@ import androidx.compose.ui.unit.dp
 import at.mocode.frontend.core.designsystem.components.MsFilePicker
 import at.mocode.frontend.core.designsystem.components.MsTextField
 import at.mocode.frontend.core.designsystem.theme.Dimens
+import at.mocode.frontend.core.domain.config.WizardFeatureFlags
+import at.mocode.frontend.core.wizard.ui.WizardScaffoldWithHotkeys
+import at.mocode.frontend.core.wizard.ui.WizardStepUi
 import at.mocode.frontend.features.turnier.presentation.TurnierWizard
 import at.mocode.frontend.features.zns.import.presentation.StammdatenImportScreen
 import kotlin.uuid.ExperimentalUuidApi
@@ -31,6 +34,31 @@ fun EventWizardScreen(
 ) {
   val state = viewModel.state
 
+  // Neuer Scaffold-Weg hinter Feature-Flag (Strangler-Pattern)
+  if (WizardFeatureFlags.WizardRuntimeEnabled) {
+    EventWizardScreenScaffolded(
+      state = state,
+      onBack = {
+        if (state.currentStep == WizardStep.ZNS_CHECK) onBack() else viewModel.previousStep()
+      },
+      onNext = { viewModel.nextStep() },
+      onSaveDraft = null, // Wird in einem Folge-Inkrement angebunden
+      onFinish = onFinish,
+      onNavigateToVeranstalterNeu = onNavigateToVeranstalterNeu,
+      renderStep = {
+        when (state.currentStep) {
+          WizardStep.ZNS_CHECK -> ZnsCheckStep(viewModel)
+          WizardStep.VERANSTALTER_SELECTION -> VeranstalterSelectionStep(viewModel, onNavigateToVeranstalterNeu)
+          WizardStep.ANSPRECHPERSON_MAPPING -> AnsprechpersonMappingStep(viewModel)
+          WizardStep.META_DATA -> MetaDataStep(viewModel)
+          WizardStep.TURNIER_ANLAGE -> TurnierAnlageStep(viewModel)
+          WizardStep.SUMMARY -> SummaryStep(viewModel, onFinish)
+        }
+      }
+    )
+    return
+  }
+
   Scaffold(
     topBar = {
       Column {
@@ -79,6 +107,62 @@ fun EventWizardScreen(
   }
 }
 
+@Composable
+private fun EventWizardScreenScaffolded(
+  state: VeranstaltungWizardState,
+  onBack: () -> Unit,
+  onNext: () -> Unit,
+  onSaveDraft: (() -> Unit)?,
+  onFinish: () -> Unit,
+  onNavigateToVeranstalterNeu: () -> Unit,
+  renderStep: @Composable () -> Unit
+) {
+  val steps = remember {
+    WizardStep.entries.map {
+      // Titel schlank aus Enum ableiten; echte Strings folgen in UI-Polishing
+      val title = when (it) {
+        WizardStep.ZNS_CHECK -> "ZNS"
+        WizardStep.VERANSTALTER_SELECTION -> "Veranstalter"
+        WizardStep.ANSPRECHPERSON_MAPPING -> "Kontakt"
+        WizardStep.META_DATA -> "Metadaten"
+        WizardStep.TURNIER_ANLAGE -> "Turniere"
+        WizardStep.SUMMARY -> "Zusammenfassung"
+      }
+      WizardStepUi(id = it.name, title = title)
+    }
+  }
+
+  val currentIndex = state.currentStep.ordinal
+  val canBack = currentIndex > 0
+  val canNext = true // Validierungslogik wird schrittweise ergänzt
+
+  WizardScaffoldWithHotkeys(
+    steps = steps,
+    currentIndex = currentIndex,
+    canBack = canBack,
+    canNext = canNext,
+    onBack = onBack,
+    onNext = if (state.currentStep == WizardStep.SUMMARY) onFinish else onNext,
+    onSaveDraft = onSaveDraft,
+    nextLabel = if (state.currentStep == WizardStep.SUMMARY) "Fertig" else "Weiter",
+    backLabel = "Zurück",
+    finishLabel = "Fertig"
+  ) {
+    // Sticky Preview oben wie gehabt
+    Column(modifier = Modifier.fillMaxSize()) {
+      VorschauCard(state = state)
+      Box(
+        modifier = Modifier
+          .weight(1f)
+          .fillMaxWidth()
+          .padding(Dimens.SpacingL)
+      ) {
+        renderStep()
+      }
+    }
+  }
+}
+
 @Composable
 private fun VorschauCard(state: VeranstaltungWizardState) {
   Card(