aufräumen

LehrerApp.Desktop/ViewModels/DashboardViewModel.cs

@@ -13,6 +13,7 @@ public partial class DashboardViewModel : ObservableObject
     private static readonly CultureInfo De = new("de-DE");
 
     private readonly IGroupRepository _groups;
+    private readonly ISubjectRepository _subjects;
     private readonly ILessonRepository _lessons;
     private readonly IExamRepository _exams;
     private readonly IWorkTaskRepository _tasks;
@@ -34,10 +35,10 @@ public partial class DashboardViewModel : ObservableObject
     // Navigation-Callback – wird von App.axaml.cs verdrahtet
     public Action<Guid>? OnNavigateToGroup { get; set; }
 
-    public DashboardViewModel(IGroupRepository groups, ILessonRepository lessons,
+    public DashboardViewModel(IGroupRepository groups, ISubjectRepository subjects, ILessonRepository lessons,
         IExamRepository exams, IWorkTaskRepository tasks, SchoolYearService sy)
     {
-        _groups = groups; _lessons = lessons; _exams = exams; _tasks = tasks; _sy = sy;
+        _groups = groups; _subjects = subjects; _lessons = lessons; _exams = exams; _tasks = tasks; _sy = sy;
         Load();
     }
 
@@ -70,7 +71,12 @@ public partial class DashboardViewModel : ObservableObject
 
         CurrentGroups.Clear();
         foreach (var g in groups.Values.OrderBy(g => g.Name))
-            CurrentGroups.Add(new() { GroupId = g.Id, Name = g.Name, Subject = g.Subject ?? "" });
+            CurrentGroups.Add(new()
+            {
+                GroupId = g.Id,
+                Name = g.Name,
+                Subject = g.SubjectId is Guid subjectId ? _subjects.GetById(subjectId)?.Name ?? "" : "",
+            });
 
         CalendarMonth = FirstOfMonth(now);
         LoadCalendar();