Merge remote-tracking branch 'origin/main'

# Conflicts:
#	LehrerApp.TemplateDesigner.Tests/ProjectLifecycleTests.cs
#	LehrerApp.TemplateDesigner/DesignerViewModel.cs
#	LehrerApp.TemplateDesigner/MainWindow.axaml
#	LehrerApp.Templating/LayoutParser.cs
#	LehrerApp.Templating/QuestTemplateRenderer.cs

LehrerApp.TemplateDesigner/MainWindow.axaml.cs

@@ -107,6 +107,22 @@ public partial class MainWindow : Window
         catch (Exception ex) { _viewModel.SetStatus($"Bildimport fehlgeschlagen: {ex.Message}", true); }
     }
 
+    [SupportedOSPlatform("windows")]
+    [SupportedOSPlatform("linux")]
+    [SupportedOSPlatform("macos")]
+    private async void OnImportPdfTemplate(object? sender, RoutedEventArgs e)
+    {
+        var dialog = new PdfImportDialog();
+        var accepted = await dialog.ShowDialog<bool>(this);
+        if (!accepted || dialog.Result is null) return;
+        try
+        {
+            _viewModel.ApplyPdfImport(dialog.Result);
+            _currentPackagePath = null; UpdateDocumentTitle(); OnPreview(sender, e);
+        }
+        catch (Exception ex) { _viewModel.SetStatus($"PDF-Vorschlag konnte nicht übernommen werden: {ex.Message}", true); }
+    }
+
     private async void OnReplaceSelectedAsset(object? sender, RoutedEventArgs e)
     {
         if (_viewModel.SelectedAsset is null) { _viewModel.SetStatus("Bitte zuerst ein Asset auswählen.", true); return; }
@@ -143,8 +159,8 @@ public partial class MainWindow : Window
         { _viewModel.SetStatus("Bitte zuerst eine Ausgangsvorlage auswählen.", true); return; }
         try
         {
-            var (template, layout) = _starterTemplates.Load(selected);
-            _viewModel.Load(template, layout); _currentPackagePath = null; UpdateDocumentTitle(); OnPreview(sender, e);
+            var (template, layout, continuationLayout) = _starterTemplates.LoadWithContinuation(selected);
+            _viewModel.Load(template, layout, continuationLayout); _currentPackagePath = null; UpdateDocumentTitle(); OnPreview(sender, e);
         }
         catch (Exception ex) { _viewModel.SetStatus($"Öffnen fehlgeschlagen: {ex.Message}", true); }
     }
@@ -155,9 +171,9 @@ public partial class MainWindow : Window
         { _viewModel.SetStatus("Bitte zuerst eine Ausgangsvorlage auswählen.", true); return; }
         try
         {
-            var (template, layout) = _starterTemplates.Load(selected);
+            var (template, layout, continuationLayout) = _starterTemplates.LoadWithContinuation(selected);
             var projectId = _starterTemplates.CreateUniqueId(template.Manifest.Id + "-neu");
-            _viewModel.LoadAsNewProject(template, layout, projectId);
+            _viewModel.LoadAsNewProject(template, layout, continuationLayout, projectId);
             _currentPackagePath = null; UpdateDocumentTitle(); OnPreview(sender, e);
         }
         catch (Exception ex) { _viewModel.SetStatus($"Klonen fehlgeschlagen: {ex.Message}", true); }
@@ -168,7 +184,8 @@ public partial class MainWindow : Window
         try
         {
             _viewModel.BuildLoaded();
-            var saved = _starterTemplates.Save(_viewModel.BuildManifest(), _viewModel.LayoutSource, _viewModel.Assets);
+            var saved = _starterTemplates.Save(_viewModel.BuildManifest(), _viewModel.LayoutSource, _viewModel.Assets,
+                _viewModel.UseContinuationLayout ? _viewModel.ContinuationLayoutSource : null);
             RefreshStarterTemplates(saved.Id);
             _viewModel.SetStatus($"Ausgangsvorlage „{saved.Name}“ lokal gespeichert/aktualisiert.", false);
         }
@@ -238,8 +255,16 @@ public partial class MainWindow : Window
         try
         {
             var path = files[0].Path.LocalPath; var loaded = new TemplateLoader().LoadFromPackage(path);
-            using var archive = ZipFile.OpenRead(path); using var reader = new StreamReader(archive.GetEntry(loaded.Manifest.LayoutFile)!.Open());
-            _viewModel.Load(loaded, reader.ReadToEnd()); _currentPackagePath = Path.GetFullPath(path);
+            using var archive = ZipFile.OpenRead(path);
+            string layoutSource;
+            using (var reader = new StreamReader(archive.GetEntry(loaded.Manifest.LayoutFile)!.Open())) layoutSource = reader.ReadToEnd();
+            string? continuationLayoutSource = null;
+            if (loaded.Manifest.ContinuationLayoutFile is { } continuationPath)
+            {
+                using var reader = new StreamReader(archive.GetEntry(continuationPath)!.Open());
+                continuationLayoutSource = reader.ReadToEnd();
+            }
+            _viewModel.Load(loaded, layoutSource, continuationLayoutSource); _currentPackagePath = Path.GetFullPath(path);
             UpdateDocumentTitle(); OnPreview(sender, e);
         }
         catch (Exception ex) { _viewModel.SetStatus($"Öffnen fehlgeschlagen: {ex.Message}", true); }
@@ -253,6 +278,40 @@ public partial class MainWindow : Window
 
     private async void OnSaveAs(object? sender, RoutedEventArgs e) => await SaveAsAsync();
 
+    private async void OnExportCurrentPdf(object? sender, RoutedEventArgs e)
+    {
+        byte[] pdf;
+        try
+        {
+            pdf = _viewModel.RenderCurrentPdf();
+        }
+        catch (Exception ex)
+        {
+            _viewModel.SetStatus($"PDF-Export fehlgeschlagen: {ex.Message}", true);
+            return;
+        }
+
+        var file = await StorageProvider.SaveFilePickerAsync(new()
+        {
+            Title = "Aktuelle Vorlagenansicht als PDF exportieren",
+            SuggestedFileName = _viewModel.TemplateId + "-vorschau.pdf",
+            DefaultExtension = "pdf",
+            FileTypeChoices = [new("PDF-Dateien") { Patterns = ["*.pdf"] }],
+        });
+        if (file is null) return;
+
+        try
+        {
+            var destination = EnsurePdfExtension(file.Path.LocalPath);
+            await File.WriteAllBytesAsync(destination, pdf);
+            _viewModel.SetStatus($"PDF-Vorschau exportiert: {Path.GetFileName(destination)}", false);
+        }
+        catch (Exception ex)
+        {
+            _viewModel.SetStatus($"PDF-Export fehlgeschlagen: {ex.Message}", true);
+        }
+    }
+
     private async Task SaveAsAsync()
     {
         try { _viewModel.BuildLoaded(); }
@@ -274,7 +333,8 @@ public partial class MainWindow : Window
         try
         {
             _viewModel.BuildLoaded();
-            TemplatePackage.Create(path, _viewModel.BuildManifest(), _viewModel.LayoutSource, _viewModel.Assets);
+            TemplatePackage.Create(path, _viewModel.BuildManifest(), _viewModel.LayoutSource, _viewModel.Assets,
+                _viewModel.UseContinuationLayout ? _viewModel.ContinuationLayoutSource : null);
             _viewModel.CanExport = true;
             _viewModel.SetStatus($"Gespeichert: {Path.GetFileName(path)}", false);
             return true;
@@ -317,6 +377,9 @@ public partial class MainWindow : Window
     private static string EnsurePackageExtension(string path) =>
         string.Equals(Path.GetExtension(path), TemplatePackage.Extension, StringComparison.OrdinalIgnoreCase)
             ? path : path + TemplatePackage.Extension;
+    private static string EnsurePdfExtension(string path) =>
+        string.Equals(Path.GetExtension(path), ".pdf", StringComparison.OrdinalIgnoreCase)
+            ? path : path + ".pdf";
     private void RefreshStarterTemplates(string? selectedId = null) =>
         _viewModel.SetStarterTemplates(_starterTemplates.GetAll(), selectedId);