feat: Formulare-Menü mit Elternbrief-Einstieg + Arbeitsblatt-Personalisierung (Nutzer-Feedback)

Neue Menü-Kategorie "Formulare" in der Menüleiste: "Elternbrief erzeugen..." öffnet
jetzt einen Schüler-Picker statt nur aus der Schülerdetailansicht erreichbar zu sein,
"Arbeitsblatt personalisieren..." ist aktiv, sobald eine einzelne Lerngruppe geöffnet
ist, und erzeugt aus einer in TemplateDesigner gebauten .lavorlage-Vorlage ein PDF je
aktivem Gruppenmitglied - über eine von den Elternbrief-Vorlagen getrennte
WorksheetTemplateStore-Bibliothek.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

LehrerApp.Desktop.Tests/PersonalizeWorksheetDialogViewModelTests.cs

@@ -0,0 +1,76 @@
+using LehrerApp.Core.Models;
+using LehrerApp.Desktop.ViewModels.Groups;
+using LehrerApp.Templating;
+using Xunit;
+
+namespace LehrerApp.Desktop.Tests;
+
+public sealed class PersonalizeWorksheetDialogViewModelTests : IDisposable
+{
+    private readonly string _directory = Path.Combine(Path.GetTempPath(), $"lehrerapp-worksheet-vm-tests-{Guid.NewGuid():N}");
+    public PersonalizeWorksheetDialogViewModelTests() => Directory.CreateDirectory(_directory);
+
+    [Fact]
+    public void Generate_ErzeugtEinePdfJeAusgewaehltemSchueler()
+    {
+        var group = new LearningGroup { Name = "8a", SchoolYear = "2025/26" };
+        var anna = new Student { FirstName = "Anna", LastName = "Adler" };
+        var ben = new Student { FirstName = "Ben", LastName = "Bauer" };
+        var vm = Build(group, [anna, ben], StoreWithTemplate());
+        var output = Path.Combine(_directory, "output");
+
+        vm.Generate(output);
+
+        Assert.Equal(2, vm.Results.Count);
+        Assert.All(vm.Results, r => Assert.True(r.Success));
+        Assert.Equal(2, Directory.GetFiles(output, "*.pdf").Length);
+    }
+
+    [Fact]
+    public void Generate_AbgewaehlterSchueler_WirdUebersprungen()
+    {
+        var group = new LearningGroup { Name = "8a", SchoolYear = "2025/26" };
+        var anna = new Student { FirstName = "Anna", LastName = "Adler" };
+        var ben = new Student { FirstName = "Ben", LastName = "Bauer" };
+        var vm = Build(group, [anna, ben], StoreWithTemplate());
+        vm.Students.Single(s => s.Model.Id == ben.Id).IsIncluded = false;
+        var output = Path.Combine(_directory, "output");
+
+        vm.Generate(output);
+
+        Assert.Single(vm.Results);
+        Assert.Equal(anna.FullName, vm.Results[0].StudentName);
+    }
+
+    [Fact]
+    public void OhneVorlage_GenerateTutNichts()
+    {
+        var group = new LearningGroup { Name = "8a", SchoolYear = "2025/26" };
+        var anna = new Student { FirstName = "Anna", LastName = "Adler" };
+        var vm = Build(group, [anna], new WorksheetTemplateStore(new TemplateStore(Path.Combine(_directory, "empty-store"))));
+        var output = Path.Combine(_directory, "output");
+
+        vm.Generate(output);
+
+        Assert.Empty(vm.Results);
+    }
+
+    private static PersonalizeWorksheetDialogViewModel Build(LearningGroup group, List<Student> students, WorksheetTemplateStore store) =>
+        new(group, [.. students.Select(s => s.Id)], new FakeStudents(students), store, new QuestTemplateRenderer());
+
+    private WorksheetTemplateStore StoreWithTemplate()
+    {
+        var source = Path.Combine(_directory, $"{Guid.NewGuid():N}.lavorlage");
+        var manifest = new TemplateManifest
+        {
+            Id = $"arbeitsblatt-{Guid.NewGuid():N}", Name = "Arbeitsblatt",
+            Placeholders = [new PlaceholderDefinition("Student.FirstName", PlaceholderType.Text)],
+        };
+        TemplatePackage.Create(source, manifest, "PAGE 210 297 mm\nTEXT 20 20 $Student.FirstName", new Dictionary<string, byte[]>());
+        var store = new WorksheetTemplateStore(new TemplateStore(Path.Combine(_directory, $"store-{Guid.NewGuid():N}")));
+        store.Store.Import(source);
+        return store;
+    }
+
+    public void Dispose() { if (Directory.Exists(_directory)) Directory.Delete(_directory, true); }
+}

LehrerApp.Desktop.Tests/SettingsViewModelTests.cs

@@ -35,7 +35,7 @@ public sealed class SettingsViewModelTests
             new FakeDocumentation(), new FakeStudents([]), new FakeShorthandCodes([]),
             holidays ?? new FakeSchoolHolidays(), new SchoolCalendarSettingsService(tempPath),
             new PeriodScheduleService(tempPath), supervisionDuties ?? new FakeSupervisionDuties(),
-            new TemplateStore(tempPath), TestSupport.BuildAiSettingsService(), TestSupport.BuildAiPlanningService(),
+            new TemplateStore(tempPath), new WorksheetTemplateStore(new TemplateStore(tempPath, subfolder: "worksheet-template-packages")), TestSupport.BuildAiSettingsService(), TestSupport.BuildAiPlanningService(),
             TestSupport.BuildMcpSettingsService(),
             TestSupport.BuildMcpClientRegistrationService(),
             TestSupport.BuildWebUntisSettingsService(),
@@ -342,7 +342,7 @@ public sealed class SettingsViewModelTests
             new LiteDbContext(new MemoryStream()), new PrivacySettingsService(tempPath),
             new FakeDocumentation(), new FakeStudents([]), new FakeShorthandCodes([]),
             new FakeSchoolHolidays(), calendarSettings, new PeriodScheduleService(tempPath),
-            new FakeSupervisionDuties(), new TemplateStore(tempPath), TestSupport.BuildAiSettingsService(), TestSupport.BuildAiPlanningService(),
+            new FakeSupervisionDuties(), new TemplateStore(tempPath), new WorksheetTemplateStore(new TemplateStore(tempPath, subfolder: "worksheet-template-packages")), TestSupport.BuildAiSettingsService(), TestSupport.BuildAiPlanningService(),
             TestSupport.BuildMcpSettingsService(),
             TestSupport.BuildMcpClientRegistrationService(),
             TestSupport.BuildWebUntisSettingsService(),
@@ -372,7 +372,7 @@ public sealed class SettingsViewModelTests
             new LiteDbContext(new MemoryStream()), new PrivacySettingsService(tempPath),
             new FakeDocumentation(), new FakeStudents([]), new FakeShorthandCodes([]),
             new FakeSchoolHolidays(), new SchoolCalendarSettingsService(tempPath), periodSchedule,
-            new FakeSupervisionDuties(), new TemplateStore(tempPath), TestSupport.BuildAiSettingsService(), TestSupport.BuildAiPlanningService(),
+            new FakeSupervisionDuties(), new TemplateStore(tempPath), new WorksheetTemplateStore(new TemplateStore(tempPath, subfolder: "worksheet-template-packages")), TestSupport.BuildAiSettingsService(), TestSupport.BuildAiPlanningService(),
             TestSupport.BuildMcpSettingsService(),
             TestSupport.BuildMcpClientRegistrationService(),
             TestSupport.BuildWebUntisSettingsService(),
@@ -406,7 +406,7 @@ public sealed class SettingsViewModelTests
             new LiteDbContext(new MemoryStream()), new PrivacySettingsService(tempPath),
             new FakeDocumentation(), new FakeStudents([]), new FakeShorthandCodes([]),
             new FakeSchoolHolidays(), new SchoolCalendarSettingsService(tempPath), periodSchedule,
-            new FakeSupervisionDuties(), new TemplateStore(tempPath), TestSupport.BuildAiSettingsService(), TestSupport.BuildAiPlanningService(),
+            new FakeSupervisionDuties(), new TemplateStore(tempPath), new WorksheetTemplateStore(new TemplateStore(tempPath, subfolder: "worksheet-template-packages")), TestSupport.BuildAiSettingsService(), TestSupport.BuildAiPlanningService(),
             TestSupport.BuildMcpSettingsService(),
             TestSupport.BuildMcpClientRegistrationService(),
             TestSupport.BuildWebUntisSettingsService(),

LehrerApp.Desktop.Tests/StudentPickerDialogViewModelTests.cs

@@ -0,0 +1,49 @@
+using LehrerApp.Core.Models;
+using LehrerApp.Desktop.ViewModels.Students;
+using Xunit;
+
+namespace LehrerApp.Desktop.Tests;
+
+public sealed class StudentPickerDialogViewModelTests
+{
+    private static (StudentPickerDialogViewModel Vm, Student Anna, Student Ben) Build()
+    {
+        var anna = new Student { FirstName = "Anna", LastName = "Adler" };
+        var ben = new Student { FirstName = "Ben", LastName = "Bauer" };
+        var vm = new StudentPickerDialogViewModel(new FakeStudents([anna, ben]));
+        return (vm, anna, ben);
+    }
+
+    [Fact]
+    public void SearchText_FiltertNachTeilstring()
+    {
+        var (vm, anna, _) = Build();
+
+        vm.SearchText = "ann";
+
+        Assert.Single(vm.Students);
+        Assert.Equal(anna.FullName, vm.Students[0].FullName);
+    }
+
+    [Fact]
+    public void Select_OhneAuswahl_SetztValidationMessage()
+    {
+        var (vm, _, _) = Build();
+
+        vm.SelectCommand.Execute(null);
+
+        Assert.Null(vm.Result);
+        Assert.NotEqual("", vm.ValidationMessage);
+    }
+
+    [Fact]
+    public void Select_MitAuswahl_LiefertVollenSchueler()
+    {
+        var (vm, anna, _) = Build();
+        vm.SelectedStudent = vm.Students.Single(s => s.Id == anna.Id);
+
+        vm.SelectCommand.Execute(null);
+
+        Assert.Equal(anna.Id, vm.Result?.Id);
+    }
+}