Klausuren-Hauptseite: gruppenübergreifende Liste mit Prioritäts-Score statt Datum

Sidebar-Klausuren war bisher ein Placeholder. Neue Seite zeigt alle Klausuren des
Schuljahres sortiert nach abgeleiteter Dringlichkeit (Korrekturfortschritt statt
manuellem Status), mit Detailbereich, Parallelkurs-Umschalter und Notenspiegel.

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

LehrerApp.Desktop.Tests/ExamGradingDialogViewModelTests.cs

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+using LehrerApp.Core.Models;
+using LehrerApp.Core.Services;
+using LehrerApp.Desktop.ViewModels.Groups;
+using Xunit;
+
+namespace LehrerApp.Desktop.Tests;
+
+/// Deckt 1.6.3 (Bulk-Aktion "Rest als abwesend markieren") ab — löst das Nutzer-Feedback, dass
+/// Schüler, die nie nachschreiben, sonst dauerhaft eine leere, unberührte Zeile hinterlassen.
+public sealed class ExamGradingDialogViewModelTests
+{
+    [Fact]
+    public void MarkRemainingAbsent_MarktNurUnberührteZeilenAbwesend()
+    {
+        var group = new LearningGroup { Name = "Q1 Chemie" };
+        var studentWithPoints = new Student { FirstName = "Anna", LastName = "Bauer" };
+        var untouchedStudent1 = new Student { FirstName = "Ben", LastName = "Cordes" };
+        var untouchedStudent2 = new Student { FirstName = "Cara", LastName = "Diehl" };
+        var students = new FakeStudents([studentWithPoints, untouchedStudent1, untouchedStudent2]);
+        var memberships = new FakeMemberships(
+        [
+            new GroupMembership { GroupId = group.Id, StudentId = studentWithPoints.Id },
+            new GroupMembership { GroupId = group.Id, StudentId = untouchedStudent1.Id },
+            new GroupMembership { GroupId = group.Id, StudentId = untouchedStudent2.Id },
+        ]);
+        var exam = new Exam
+        {
+            GroupId = group.Id,
+            Title = "Klausur 1",
+            Tasks = [new ExamTask { Nr = 1, MaxPoints = 10 }],
+            GradingKey = GradingService.DefaultKey1To6(),
+        };
+        var results = new FakeResults();
+
+        var vm = new ExamGradingDialogViewModel(results, students, memberships,
+            new GradingService(), exam, group.Id);
+
+        var rowWithPoints = vm.Rows.Single(r => r.StudentId == studentWithPoints.Id);
+        rowWithPoints.Cells[0].TrySetValue(7);
+
+        vm.MarkRemainingAbsentCommand.Execute(null);
+
+        Assert.False(rowWithPoints.Absent);
+        Assert.True(vm.Rows.Single(r => r.StudentId == untouchedStudent1.Id).Absent);
+        Assert.True(vm.Rows.Single(r => r.StudentId == untouchedStudent2.Id).Absent);
+    }
+
+    [Fact]
+    public void MarkRemainingAbsent_LässtBereitsAbwesendMarkierteUnverändert()
+    {
+        var group = new LearningGroup { Name = "Q1 Chemie" };
+        var student = new Student { FirstName = "Ben", LastName = "Cordes" };
+        var students = new FakeStudents([student]);
+        var memberships = new FakeMemberships(
+            [new GroupMembership { GroupId = group.Id, StudentId = student.Id }]);
+        var exam = new Exam { GroupId = group.Id, Title = "Klausur 1", Tasks = [new ExamTask { Nr = 1, MaxPoints = 10 }], GradingKey = GradingService.DefaultKey1To6() };
+        var vm = new ExamGradingDialogViewModel(new FakeResults(), students, memberships,
+            new GradingService(), exam, group.Id);
+
+        vm.Rows[0].Absent = true;
+        vm.MarkRemainingAbsentCommand.Execute(null);
+
+        Assert.True(vm.Rows[0].Absent);
+    }
+}

LehrerApp.Desktop.Tests/ExamsOverviewViewModelTests.cs

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+using LehrerApp.Core.Models;
+using LehrerApp.Core.Services;
+using LehrerApp.Desktop.ViewModels.Exams;
+using Xunit;
+
+namespace LehrerApp.Desktop.Tests;
+
+/// Deckt 1.6 (Klausuren-Hauptseite) ab: Priorisierung end-to-end über die ViewModel-Schicht,
+/// Parallelkurs-Umschalter (1.6.4) und Genehmigung/Ankündigung (1.6.5).
+public sealed class ExamsOverviewViewModelTests
+{
+    private static ExamsOverviewViewModel BuildVm(List<LearningGroup> groups, List<Exam> exams,
+        FakeMemberships? memberships = null, FakeResults? results = null) =>
+        new(new FakeExams(exams), results ?? new FakeResults(), new FakeGroups(groups),
+            memberships ?? new FakeMemberships([]), new GradingService(), new SchoolYearService());
+
+    [Fact]
+    public void Load_UnbearbeiteteKorrekturStehtVorGeplanterKlausur()
+    {
+        var group = new LearningGroup { Name = "Q1 Chemie", SchoolYear = new SchoolYearService().CurrentSchoolYear() };
+        var today = DateOnly.FromDateTime(DateTime.Today);
+        var overdue = new Exam { GroupId = group.Id, Title = "Alte Klausur", Status = ExamStatus.Conducted, Date = today.AddDays(-10) };
+        var planned = new Exam { GroupId = group.Id, Title = "Neue Klausur", Status = ExamStatus.Planned, Date = today.AddDays(3) };
+
+        var vm = BuildVm([group], [overdue, planned]);
+        vm.LoadCommand.Execute(null);
+
+        Assert.Equal("Alte Klausur", vm.Rows[0].Title);
+        Assert.Equal("Neue Klausur", vm.Rows[1].Title);
+    }
+
+    [Fact]
+    public void Load_ParallelkurseWerdenAlsGeschwisterErkannt()
+    {
+        var groupA = new LearningGroup { Name = "Chemie GK Q1", SchoolYear = new SchoolYearService().CurrentSchoolYear() };
+        var groupB = new LearningGroup { Name = "Chemie GK Q1b", SchoolYear = groupA.SchoolYear };
+        var original = new Exam { GroupId = groupA.Id, Title = "Redox", Status = ExamStatus.Planned, Date = DateOnly.FromDateTime(DateTime.Today).AddDays(5) };
+        var duplicate = new Exam
+        {
+            GroupId = groupB.Id, Title = "Redox", Status = ExamStatus.Planned,
+            Date = DateOnly.FromDateTime(DateTime.Today).AddDays(6), SharedExamGroupId = original.Id,
+        };
+
+        var vm = BuildVm([groupA, groupB], [original, duplicate]);
+        vm.LoadCommand.Execute(null);
+
+        vm.SelectedRow = vm.Rows.Single(r => r.Exam.Id == original.Id);
+        Assert.True(vm.SelectedRow.HasSibling);
+        Assert.Single(vm.Siblings);
+        Assert.Equal(duplicate.Id, vm.Siblings[0].Exam.Id);
+    }
+
+    [Fact]
+    public void ToggleApproval_SetztUndLöschtDatum()
+    {
+        var group = new LearningGroup { Name = "Q1 Chemie", SchoolYear = new SchoolYearService().CurrentSchoolYear() };
+        var exam = new Exam { GroupId = group.Id, Title = "Klausur", Status = ExamStatus.Planned, Date = DateOnly.FromDateTime(DateTime.Today).AddDays(2) };
+        var vm = BuildVm([group], [exam]);
+        vm.LoadCommand.Execute(null);
+        vm.SelectedRow = vm.Rows[0];
+
+        vm.ToggleApprovalCommand.Execute(null);
+        Assert.NotNull(exam.ApprovalGrantedAt);
+        Assert.StartsWith("Genehmigt am", vm.ApprovalLabel);
+
+        vm.ToggleApprovalCommand.Execute(null);
+        Assert.Null(exam.ApprovalGrantedAt);
+        Assert.Equal("Genehmigung noch ausstehend", vm.ApprovalLabel);
+    }
+
+    [Fact]
+    public void Selection_ZeigtKorrekturfortschrittOderNotenspiegelJeNachStatus()
+    {
+        var group = new LearningGroup { Name = "Q1 Chemie", SchoolYear = new SchoolYearService().CurrentSchoolYear() };
+        var today = DateOnly.FromDateTime(DateTime.Today);
+        var conducted = new Exam { GroupId = group.Id, Title = "Läuft", Status = ExamStatus.Conducted, Date = today.AddDays(-2) };
+        var returned = new Exam { GroupId = group.Id, Title = "Fertig", Status = ExamStatus.Returned, Date = today.AddDays(-20) };
+        var vm = BuildVm([group], [conducted, returned]);
+        vm.LoadCommand.Execute(null);
+
+        vm.SelectedRow = vm.Rows.Single(r => r.Exam.Id == conducted.Id);
+        Assert.True(vm.ShowCorrectionProgress);
+        Assert.False(vm.ShowGradeSummary);
+
+        vm.SelectedRow = vm.Rows.Single(r => r.Exam.Id == returned.Id);
+        Assert.False(vm.ShowCorrectionProgress);
+        Assert.True(vm.ShowGradeSummary);
+    }
+}