Dokumentation: Eintrag von WebUntis-Klassenbuch-Abgleich ausschließen

Neues Feld Documentation.ExcludeFromWebUntisSync (Checkbox im Dialog) blendet
den Eintrag aus dem Zwischenablage-Vorschlag im Klassenbuch-Abgleich aus, für
Notizen, die nur für die eigene pädagogische Arbeit gedacht sind.

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

LehrerApp.Desktop/ViewModels/Students/DocumentationViewModels.cs

@@ -107,6 +107,7 @@ public partial class DocumentationDialogViewModel : ObservableObject
     [ObservableProperty] private string _title = "";
     [ObservableProperty] private string _content = "";
     [ObservableProperty] private bool _isConfidential;
+    [ObservableProperty] private bool _excludeFromWebUntisSync;
 
     [ObservableProperty] private string _newParticipant = "";
     public ObservableCollection<string> Participants { get; } = [];
@@ -176,6 +177,7 @@ public partial class DocumentationDialogViewModel : ObservableObject
         Title = editing.Title;
         Content = editing.Content;
         IsConfidential = editing.IsConfidential;
+        ExcludeFromWebUntisSync = editing.ExcludeFromWebUntisSync;
         foreach (var p in editing.Participants) Participants.Add(p);
         if (editing.AbsenceData is { } a)
         {
@@ -343,6 +345,7 @@ public partial class DocumentationDialogViewModel : ObservableObject
         // Schnellentwurf ab. Stunden- und Lesson-Bezug bleiben am bestehenden Objekt erhalten.
         Result.IsDraft = false;
         Result.IsConfidential = IsConfidential;
+        Result.ExcludeFromWebUntisSync = ExcludeFromWebUntisSync;
         Result.Participants = type == DocumentationType.Conversation ? Participants.ToList() : [];
         Result.AbsenceData = type == DocumentationType.Absence
             ? new AbsenceData

LehrerApp.Desktop/ViewModels/Students/WebUntisDocumentationComparisonViewModel.cs

@@ -128,6 +128,7 @@ public partial class WebUntisDocumentationComparisonViewModel : ObservableObject
 
             foreach (var doc in localDocs)
             {
+                if (doc.ExcludeFromWebUntisSync) continue;
                 var coveredByReport = Rows.Any(r => r.AssignedStudent?.Id == doc.StudentId && r.Date == doc.Date);
                 if (coveredByReport) continue;
                 var student = ownStudents.FirstOrDefault(s => s.Id == doc.StudentId);