Schülerdokumentation: Einträge, Fehlzeitenbilanz, Datenschutz (Kapitel 5)

Dokumentationseinträge mit Typwahl (Gespräch, Vorkommnis, Förderplan,
Fehlzeit, Elternanruf, Elternbrief), vertrauliche Einträge nur nach
Bestätigung sichtbar, weiche Löschung mit Nachvollziehbarkeit. Fehlzeiten
als Auswertung des bestehenden Anwesenheits-Trackings statt zweiter
Erfassung, mit Schwellenwert-Warnung im Schülerdetail und Dashboard.
Förderplan-Wiedervorlage als Dashboard-Karte. Datenschutz: Löschfristen
mit manueller Bereinigung und DSGVO-Art.-15-Datenauskunft als Export.

Auf Nutzer-Feedback hin ergänzt: Elternanruf mit begleitendem
Gesprächsprotokoll-Dialog (Punkte abhaken, Eindrücke festhalten),
Elternbrief mit Versand-/Rückmeldungs-Tracking, Datei-Anhänge über
LiteDBs Dateispeicher, frei vergebbare Labels zur Nachverfolgung mit
Dringlichkeits-Farbcodierung, sowie eine sichtbare Farblegende für das
bestehende Notenentwicklungs-Diagramm. Dabei einen Absturz behoben:
leere Textfelder lieferten über das Binding null statt "", was beim
Speichern eine NullReferenceException auslöste.

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

LehrerApp.Desktop/Views/Dashboard/DashboardView.axaml

@@ -4,6 +4,13 @@
              x:Class="LehrerApp.Desktop.Views.Dashboard.DashboardView"
              x:DataType="vm:DashboardViewModel">
 
+  <UserControl.Styles>
+    <Style Selector="TextBlock.overdue">
+      <Setter Property="Foreground" Value="Red"/>
+      <Setter Property="FontWeight" Value="SemiBold"/>
+    </Style>
+  </UserControl.Styles>
+
   <ScrollViewer Padding="24">
     <StackPanel Spacing="20">
 
@@ -13,7 +20,7 @@
         <TextBlock Text="{Binding CurrentDate}" FontSize="24" FontWeight="SemiBold"/>
       </StackPanel>
 
-      <Grid ColumnDefinitions="*,*" RowDefinitions="Auto,Auto,Auto">
+      <Grid ColumnDefinitions="*,*" RowDefinitions="Auto,Auto,Auto,Auto">
 
         <!-- Heutige Stunden -->
         <Border Grid.Column="0" Grid.Row="0" Margin="0,0,8,8"
@@ -200,8 +207,67 @@
           </StackPanel>
         </Border>
 
+        <!-- Fehlzeiten-Warnung (5.2.3) -->
+        <Border Grid.Column="0" Grid.Row="2" Margin="0,0,8,8" VerticalAlignment="Top"
+                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
+                CornerRadius="8" Padding="16">
+          <StackPanel>
+            <TextBlock Text="FEHLZEITEN-WARNUNG" FontSize="11" FontWeight="Bold"
+                       Opacity="0.5" Margin="0,0,0,10"/>
+            <ItemsControl ItemsSource="{Binding AttendanceWarnings}">
+              <ItemsControl.ItemTemplate>
+                <DataTemplate DataType="vm:AttendanceWarningItem">
+                  <Grid ColumnDefinitions="*,Auto" Margin="0,4">
+                    <Button Grid.Column="0" Content="{Binding StudentName}" FontSize="13"
+                            HorizontalAlignment="Left" HorizontalContentAlignment="Left"
+                            Background="Transparent" Padding="0"
+                            Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenStudentAttendanceCommand}"
+                            CommandParameter="{Binding}"/>
+                    <TextBlock Grid.Column="1" Foreground="Red" FontSize="12" VerticalAlignment="Center">
+                      <Run Text="{Binding AbsenceRatePercent}"/>
+                      <Run Text=" %"/>
+                    </TextBlock>
+                  </Grid>
+                </DataTemplate>
+              </ItemsControl.ItemTemplate>
+            </ItemsControl>
+            <TextBlock Text="Keine Fehlzeiten über dem Schwellenwert." Classes="emptyhint"
+                       IsVisible="{Binding !AttendanceWarnings.Count}"/>
+          </StackPanel>
+        </Border>
+
+        <!-- Förderplan-Wiedervorlage (5.3.2) -->
+        <Border Grid.Column="1" Grid.Row="2" Margin="8,0,0,8" VerticalAlignment="Top"
+                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
+                CornerRadius="8" Padding="16">
+          <StackPanel>
+            <TextBlock Text="FÖRDERPLAN-WIEDERVORLAGE" FontSize="11" FontWeight="Bold"
+                       Opacity="0.5" Margin="0,0,0,10"/>
+            <ItemsControl ItemsSource="{Binding SupportPlanReviews}">
+              <ItemsControl.ItemTemplate>
+                <DataTemplate DataType="vm:SupportPlanDueItem">
+                  <Grid ColumnDefinitions="*,Auto" Margin="0,4">
+                    <StackPanel Grid.Column="0">
+                      <Button Content="{Binding StudentName}" FontSize="13" FontWeight="SemiBold"
+                              HorizontalAlignment="Left" HorizontalContentAlignment="Left"
+                              Background="Transparent" Padding="0"
+                              Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenStudentSupportPlanCommand}"
+                              CommandParameter="{Binding}"/>
+                      <TextBlock Text="{Binding Title}" FontSize="11" Opacity="0.6"/>
+                    </StackPanel>
+                    <TextBlock Grid.Column="1" Text="{Binding ReviewDateDisplay}" FontSize="12"
+                               VerticalAlignment="Center" Classes.overdue="{Binding IsOverdue}"/>
+                  </Grid>
+                </DataTemplate>
+              </ItemsControl.ItemTemplate>
+            </ItemsControl>
+            <TextBlock Text="Keine fälligen Überprüfungen." Classes="emptyhint"
+                       IsVisible="{Binding !SupportPlanReviews.Count}"/>
+          </StackPanel>
+        </Border>
+
         <!-- Meine Lerngruppen: wächst mit der Zeit, deshalb ganz unten und volle Breite -->
-        <Border Grid.Column="0" Grid.Row="2" Grid.ColumnSpan="2"
+        <Border Grid.Column="0" Grid.Row="3" Grid.ColumnSpan="2"
                 Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                 CornerRadius="8" Padding="16">
           <StackPanel>

LehrerApp.Desktop/Views/Settings/SettingsView.axaml

@@ -378,6 +378,58 @@
         </ScrollViewer>
       </ContentPage>
 
+      <!-- Tab: Datenschutz (5.4.2) -->
+      <ContentPage Header="Datenschutz">
+        <ScrollViewer>
+          <StackPanel Margin="32,20,32,28" Spacing="14" MaxWidth="640">
+
+            <TextBlock Text="Löschfristen für Dokumentationseinträge" FontSize="16" FontWeight="SemiBold"/>
+            <TextBlock Text="Einträge werden nie automatisch gelöscht — hier abgelaufene Einträge nur zur manuellen Prüfung anzeigen."
+                       FontSize="12" Opacity="0.6" TextWrapping="Wrap"/>
+
+            <Grid ColumnDefinitions="140,Auto">
+              <NumericUpDown Grid.Column="0" Value="{Binding RetentionYears}" Minimum="1" Maximum="20" FormatString="0"/>
+              <Button Grid.Column="1" Content="Speichern" Margin="8,0,0,0"
+                      Command="{Binding SaveRetentionYearsCommand}"/>
+            </Grid>
+            <TextBlock Text="{Binding RetentionStatus}" Foreground="Green" FontSize="12"
+                       IsVisible="{Binding RetentionStatus, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+
+            <Separator Margin="0,4"/>
+
+            <TextBlock Text="Abgelaufene Einträge" FontSize="14" FontWeight="SemiBold"/>
+            <ItemsControl ItemsSource="{Binding ExpiredDocuments}">
+              <ItemsControl.ItemTemplate>
+                <DataTemplate DataType="vm:ExpiredDocumentItem">
+                  <Border BorderBrush="{DynamicResource SystemControlForegroundBaseLowBrush}"
+                          BorderThickness="0,0,0,1" Padding="0,7">
+                    <Grid ColumnDefinitions="*,Auto">
+                      <StackPanel Grid.Column="0">
+                        <TextBlock FontSize="13">
+                          <Run Text="{Binding StudentName}"/>
+                          <Run Text=" — "/>
+                          <Run Text="{Binding Title}"/>
+                        </TextBlock>
+                        <TextBlock FontSize="11" Opacity="0.5">
+                          <Run Text="erfasst am "/>
+                          <Run Text="{Binding CreatedAtDisplay}"/>
+                        </TextBlock>
+                      </StackPanel>
+                      <Button Grid.Column="1" Content="Endgültig löschen" FontSize="12" Padding="10,4"
+                              Command="{Binding $parent[ItemsControl].((vm:SettingsViewModel)DataContext).HardDeleteDocumentCommand}"
+                              CommandParameter="{Binding}"/>
+                    </Grid>
+                  </Border>
+                </DataTemplate>
+              </ItemsControl.ItemTemplate>
+            </ItemsControl>
+            <TextBlock Text="Keine abgelaufenen Einträge." Classes="emptyhint"
+                       IsVisible="{Binding !ExpiredDocuments.Count}"/>
+
+          </StackPanel>
+        </ScrollViewer>
+      </ContentPage>
+
     </TabbedPage>
   </Grid>
 </UserControl>

LehrerApp.Desktop/Views/Settings/SettingsView.axaml.cs

@@ -19,6 +19,7 @@ public partial class SettingsView : UserControl
         {
             vm.OnConfirmRestore = ShowRestoreConfirmDialog;
             vm.OnAppLockChanged = () => App.Services.GetRequiredService<AppLockViewModel>().ApplyConfig();
+            vm.OnConfirmHardDelete = ShowHardDeleteConfirmDialog;
         }
     }
 
@@ -36,6 +37,19 @@ public partial class SettingsView : UserControl
         return owner is not null && await dialog.ShowDialog<bool>(owner);
     }
 
+    private async Task<bool> ShowHardDeleteConfirmDialog(ExpiredDocumentItem item)
+    {
+        var info = new ConfirmDialogInfo
+        {
+            Title       = "Eintrag endgültig löschen?",
+            Message     = $"\"{item.Title}\" ({item.StudentName}) wird unwiderruflich gelöscht, nicht nur ausgeblendet.",
+            ConfirmText = "Endgültig löschen",
+        };
+        var dialog = new ConfirmDialog { DataContext = info };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        return owner is not null && await dialog.ShowDialog<bool>(owner);
+    }
+
     private async void OnImportClick(object? sender, RoutedEventArgs e)
     {
         var topLevel = TopLevel.GetTopLevel(this);

LehrerApp.Desktop/Views/Students/DocumentationDialog.axaml

@@ -0,0 +1,235 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Students"
+        x:Class="LehrerApp.Desktop.Views.Students.DocumentationDialog"
+        x:DataType="vm:DocumentationDialogViewModel"
+        Title="{Binding DialogTitle}"
+        Width="480" SizeToContent="Height" MinHeight="360"
+        CanResize="True" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="*,Auto" Margin="24">
+    <ScrollViewer Grid.Row="0">
+      <StackPanel Spacing="12">
+        <TextBlock Text="{Binding DialogTitle}" Classes="dialogtitle"/>
+
+        <Grid ColumnDefinitions="*,12,140">
+          <StackPanel Grid.Column="0" Spacing="4">
+            <TextBlock Text="Titel *" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding Title}"/>
+            <TextBlock Text="{Binding TitleError}" Foreground="Red" FontSize="11"
+                       IsVisible="{Binding TitleError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+          </StackPanel>
+          <StackPanel Grid.Column="2" Spacing="4">
+            <TextBlock Text="Datum *" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding DateText}" PlaceholderText="TT.MM.JJJJ"/>
+            <TextBlock Text="{Binding DateTextError}" Foreground="Red" FontSize="11"
+                       IsVisible="{Binding DateTextError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+          </StackPanel>
+        </Grid>
+
+        <StackPanel Spacing="4">
+          <TextBlock Text="Typ *" FontSize="12" Opacity="0.7"/>
+          <ComboBox ItemsSource="{Binding TypeOptions}" SelectedItem="{Binding TypeName}"
+                    HorizontalAlignment="Stretch"/>
+        </StackPanel>
+
+        <StackPanel Spacing="4">
+          <TextBlock Text="Beschreibung" FontSize="12" Opacity="0.7"/>
+          <TextBox Text="{Binding Content}" AcceptsReturn="True" Height="80" TextWrapping="Wrap"/>
+        </StackPanel>
+
+        <!-- Gespräch: Teilnehmer (5.1.2) -->
+        <StackPanel Spacing="6" IsVisible="{Binding IsConversation}">
+          <TextBlock Text="Teilnehmer" FontSize="12" Opacity="0.7"/>
+          <ItemsControl ItemsSource="{Binding Participants}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate>
+                <Grid ColumnDefinitions="*,Auto" Margin="0,2">
+                  <TextBlock Grid.Column="0" Text="{Binding}" VerticalAlignment="Center" FontSize="13"/>
+                  <Button Grid.Column="1" Content="×" Padding="7,2" FontSize="13"
+                          Command="{Binding $parent[ItemsControl].((vm:DocumentationDialogViewModel)DataContext).RemoveParticipantCommand}"
+                          CommandParameter="{Binding}"/>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <Grid ColumnDefinitions="*,8,Auto">
+            <TextBox Grid.Column="0" Text="{Binding NewParticipant}" PlaceholderText="Name"/>
+            <Button Grid.Column="2" Content="＋" Command="{Binding AddParticipantCommand}"/>
+          </Grid>
+        </StackPanel>
+
+        <!-- Fehlzeit: Aktenvermerk (5.1.1) -->
+        <StackPanel Spacing="8" IsVisible="{Binding IsAbsence}">
+          <TextBlock Text="Freier Aktenvermerk zu einer Abwesenheit (z.B. Krankschreibung eingereicht). Ersetzt nicht die Anwesenheits-Erfassung in der Mitarbeit-Ansicht und fließt nicht in die Fehlzeitenbilanz ein."
+                     FontSize="11" Opacity="0.55" TextWrapping="Wrap"/>
+          <Grid ColumnDefinitions="120,12,*">
+            <StackPanel Grid.Column="0" Spacing="4">
+              <TextBlock Text="Stunden" FontSize="12" Opacity="0.7"/>
+              <NumericUpDown Value="{Binding LessonCount}" Minimum="0" FormatString="0"/>
+            </StackPanel>
+            <StackPanel Grid.Column="2" Spacing="4" VerticalAlignment="Bottom">
+              <CheckBox Content="Entschuldigt" IsChecked="{Binding AbsenceExcused}"/>
+            </StackPanel>
+          </Grid>
+          <StackPanel Spacing="4">
+            <TextBlock Text="Grund" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding AbsenceReason}"/>
+          </StackPanel>
+        </StackPanel>
+
+        <!-- Förderplan (5.3.1) -->
+        <StackPanel Spacing="8" IsVisible="{Binding IsSupportPlan}">
+          <TextBlock Text="Maßnahmen" FontSize="12" Opacity="0.7"/>
+          <ItemsControl ItemsSource="{Binding Measures}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate>
+                <Grid ColumnDefinitions="*,Auto" Margin="0,2">
+                  <TextBlock Grid.Column="0" Text="{Binding}" VerticalAlignment="Center" FontSize="13"/>
+                  <Button Grid.Column="1" Content="×" Padding="7,2" FontSize="13"
+                          Command="{Binding $parent[ItemsControl].((vm:DocumentationDialogViewModel)DataContext).RemoveMeasureCommand}"
+                          CommandParameter="{Binding}"/>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <Grid ColumnDefinitions="*,8,Auto">
+            <TextBox Grid.Column="0" Text="{Binding NewMeasure}" PlaceholderText="Maßnahme"/>
+            <Button Grid.Column="2" Content="＋" Command="{Binding AddMeasureCommand}"/>
+          </Grid>
+          <Grid ColumnDefinitions="*,12,*">
+            <StackPanel Grid.Column="0" Spacing="4">
+              <TextBlock Text="Überprüfung am" FontSize="12" Opacity="0.7"/>
+              <TextBox Text="{Binding ReviewDateText}" PlaceholderText="TT.MM.JJJJ"/>
+              <TextBlock Text="{Binding ReviewDateTextError}" Foreground="Red" FontSize="11"
+                         IsVisible="{Binding ReviewDateTextError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+            </StackPanel>
+            <StackPanel Grid.Column="2" Spacing="4">
+              <TextBlock Text="Status" FontSize="12" Opacity="0.7"/>
+              <ComboBox ItemsSource="{Binding SupportStatusOptions}" SelectedItem="{Binding SupportStatusName}"
+                        HorizontalAlignment="Stretch"/>
+            </StackPanel>
+          </Grid>
+        </StackPanel>
+
+        <!-- Elternanruf: Planung (Abhaken/Protokoll läuft separat über "Gespräch begleiten") -->
+        <StackPanel Spacing="6" IsVisible="{Binding IsParentCall}">
+          <TextBlock Text="Gesprächspunkte planen. Abgehakt und protokolliert wird während des Anrufs über den Button 'Gespräch begleiten' in der Übersicht."
+                     FontSize="11" Opacity="0.55" TextWrapping="Wrap"/>
+          <ItemsControl ItemsSource="{Binding CallPoints}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate>
+                <Grid ColumnDefinitions="*,Auto" Margin="0,2">
+                  <TextBlock Grid.Column="0" Text="{Binding}" VerticalAlignment="Center" FontSize="13"/>
+                  <Button Grid.Column="1" Content="×" Padding="7,2" FontSize="13"
+                          Command="{Binding $parent[ItemsControl].((vm:DocumentationDialogViewModel)DataContext).RemoveCallPointCommand}"
+                          CommandParameter="{Binding}"/>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <Grid ColumnDefinitions="*,8,Auto">
+            <TextBox Grid.Column="0" Text="{Binding NewCallPoint}" PlaceholderText="Gesprächspunkt"/>
+            <Button Grid.Column="2" Content="＋" Command="{Binding AddCallPointCommand}"/>
+          </Grid>
+        </StackPanel>
+
+        <!-- Elternbrief (5.1) -->
+        <StackPanel Spacing="8" IsVisible="{Binding IsParentLetter}">
+          <StackPanel Spacing="4">
+            <TextBlock Text="Entwurf / Inhalt" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding LetterDraftContent}" AcceptsReturn="True" Height="70" TextWrapping="Wrap"/>
+          </StackPanel>
+          <Grid ColumnDefinitions="*,12,*">
+            <StackPanel Grid.Column="0" Spacing="4">
+              <TextBlock Text="Versendet am" FontSize="12" Opacity="0.7"/>
+              <TextBox Text="{Binding LetterSentDateText}" PlaceholderText="TT.MM.JJJJ"/>
+              <TextBlock Text="{Binding LetterSentDateError}" Foreground="Red" FontSize="11"
+                         IsVisible="{Binding LetterSentDateError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+            </StackPanel>
+            <StackPanel Grid.Column="2" Spacing="4" VerticalAlignment="Bottom">
+              <CheckBox Content="Rückmeldung erhalten" IsChecked="{Binding LetterResponseReceived}"/>
+            </StackPanel>
+          </Grid>
+          <Grid ColumnDefinitions="*,12,*">
+            <StackPanel Grid.Column="0" Spacing="4">
+              <TextBlock Text="Rückmeldung am" FontSize="12" Opacity="0.7"/>
+              <TextBox Text="{Binding LetterResponseDateText}" PlaceholderText="TT.MM.JJJJ"/>
+              <TextBlock Text="{Binding LetterResponseDateError}" Foreground="Red" FontSize="11"
+                         IsVisible="{Binding LetterResponseDateError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+            </StackPanel>
+            <StackPanel Grid.Column="2" Spacing="4">
+              <TextBlock Text="Rückmeldung (Notiz)" FontSize="12" Opacity="0.7"/>
+              <TextBox Text="{Binding LetterResponseNote}"/>
+            </StackPanel>
+          </Grid>
+        </StackPanel>
+
+        <!-- Anhänge (alle Typen) -->
+        <StackPanel Spacing="6">
+          <Grid ColumnDefinitions="*,Auto">
+            <TextBlock Grid.Column="0" Text="Anhänge" FontSize="12" Opacity="0.7" VerticalAlignment="Center"/>
+            <Button Grid.Column="1" Content="＋ Datei" FontSize="12" Padding="8,4" Click="OnAddAttachment"/>
+          </Grid>
+          <ItemsControl ItemsSource="{Binding Attachments}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate x:DataType="vm:AttachmentItem">
+                <Grid ColumnDefinitions="*,Auto,Auto,Auto" Margin="0,2">
+                  <TextBlock Grid.Column="0" Text="{Binding FileName}" VerticalAlignment="Center" FontSize="13"
+                             TextTrimming="CharacterEllipsis"/>
+                  <TextBlock Grid.Column="1" Text="{Binding SizeDisplay}" VerticalAlignment="Center"
+                             FontSize="11" Opacity="0.5" Margin="6,0"/>
+                  <Button Grid.Column="2" Content="Speichern" FontSize="11" Padding="7,2" Margin="0,0,4,0"
+                          Click="OnOpenAttachment" Tag="{Binding}"/>
+                  <Button Grid.Column="3" Content="×" FontSize="13" Padding="7,2"
+                          Command="{Binding $parent[ItemsControl].((vm:DocumentationDialogViewModel)DataContext).RemoveAttachmentCommand}"
+                          CommandParameter="{Binding}"/>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <TextBlock Text="{Binding AttachmentError}" Foreground="Red" FontSize="11"
+                     IsVisible="{Binding AttachmentError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+        </StackPanel>
+
+        <!-- Labels zur Nachverfolgung (alle Typen) -->
+        <StackPanel Spacing="6">
+          <TextBlock Text="Labels" FontSize="12" Opacity="0.7"/>
+          <ItemsControl ItemsSource="{Binding Tags}">
+            <ItemsControl.ItemsPanel>
+              <ItemsPanelTemplate><WrapPanel ItemSpacing="6" LineSpacing="6"/></ItemsPanelTemplate>
+            </ItemsControl.ItemsPanel>
+            <ItemsControl.ItemTemplate>
+              <DataTemplate>
+                <Border Background="{DynamicResource SystemControlBackgroundBaseMediumBrush}"
+                        CornerRadius="10" Padding="8,3">
+                  <StackPanel Orientation="Horizontal" Spacing="5">
+                    <TextBlock Text="{Binding}" FontSize="11"/>
+                    <Button Content="×" FontSize="11" Padding="0" Background="Transparent"
+                            Command="{Binding $parent[ItemsControl].((vm:DocumentationDialogViewModel)DataContext).RemoveTagCommand}"
+                            CommandParameter="{Binding}"/>
+                  </StackPanel>
+                </Border>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <Grid ColumnDefinitions="*,8,Auto">
+            <AutoCompleteBox Grid.Column="0" Text="{Binding NewTag}"
+                              ItemsSource="{Binding TagSuggestions}"
+                              FilterMode="Contains" MinimumPrefixLength="0"
+                              PlaceholderText="Label (z.B. Kritisch, Nacharbeiten)"/>
+            <Button Grid.Column="2" Content="＋" Command="{Binding AddTagCommand}"/>
+          </Grid>
+        </StackPanel>
+
+        <CheckBox Content="Vertraulich" IsChecked="{Binding IsConfidential}"
+                  ToolTip.Tip="Blendet den Inhalt in der Übersicht standardmäßig aus; erst nach Klick auf 'Anzeigen' sichtbar."/>
+      </StackPanel>
+    </ScrollViewer>
+
+    <Grid Grid.Row="1" ColumnDefinitions="*,8,*" Margin="0,20,0,0">
+      <Button Grid.Column="0" Content="Abbrechen" HorizontalAlignment="Stretch" Click="OnCancel"/>
+      <Button Grid.Column="2" Content="Speichern" HorizontalAlignment="Stretch" Click="OnSave"/>
+    </Grid>
+  </Grid>
+</Window>

LehrerApp.Desktop/Views/Students/DocumentationDialog.axaml.cs

@@ -0,0 +1,58 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Platform.Storage;
+using LehrerApp.Desktop.ViewModels.Students;
+
+namespace LehrerApp.Desktop.Views.Students;
+
+public partial class DocumentationDialog : Window
+{
+    public DocumentationDialog() => InitializeComponent();
+
+    private void OnSave(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is DocumentationDialogViewModel vm)
+        {
+            vm.SaveCommand.Execute(null);
+            if (vm.Result is not null) Close(true);
+        }
+    }
+
+    private void OnCancel(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is DocumentationDialogViewModel vm) vm.DiscardUnsavedAttachments();
+        Close(false);
+    }
+
+    private async void OnAddAttachment(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is not DocumentationDialogViewModel vm) return;
+
+        var files = await StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
+        {
+            Title = "Anhang auswählen", AllowMultiple = false,
+        });
+        if (files.Count == 0) return;
+
+        await using var stream = await files[0].OpenReadAsync();
+        vm.AddAttachment(files[0].Name, stream);
+    }
+
+    private async void OnOpenAttachment(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is not DocumentationDialogViewModel vm) return;
+        if (sender is not Button { Tag: AttachmentItem item }) return;
+
+        using var source = vm.OpenAttachment(item);
+        if (source is null) return;
+
+        var file = await StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
+        {
+            Title = "Anhang speichern unter", SuggestedFileName = item.FileName,
+        });
+        if (file is null) return;
+
+        await using var target = await file.OpenWriteAsync();
+        await source.CopyToAsync(target);
+    }
+}

LehrerApp.Desktop/Views/Students/ParentCallSessionDialog.axaml

@@ -0,0 +1,41 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Students"
+        x:Class="LehrerApp.Desktop.Views.Students.ParentCallSessionDialog"
+        x:DataType="vm:ParentCallSessionViewModel"
+        Title="Elternanruf begleiten"
+        Width="440" SizeToContent="Height" MinHeight="300"
+        CanResize="True" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="*,Auto" Margin="24">
+    <ScrollViewer Grid.Row="0">
+      <StackPanel Spacing="14">
+        <TextBlock Text="Elternanruf begleiten" Classes="dialogtitle"/>
+        <TextBlock Text="{Binding StudentTitle}" FontSize="13" Opacity="0.6"/>
+
+        <StackPanel Spacing="6">
+          <TextBlock Text="Gesprächspunkte" FontSize="12" FontWeight="SemiBold" Opacity="0.7"/>
+          <ItemsControl ItemsSource="{Binding Points}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate x:DataType="vm:ParentCallPointItem">
+                <CheckBox Content="{Binding Text}" IsChecked="{Binding IsDone}" Margin="0,3"/>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <TextBlock Text="Keine Gesprächspunkte geplant." Classes="emptyhint"
+                     IsVisible="{Binding !Points.Count}"/>
+        </StackPanel>
+
+        <StackPanel Spacing="4">
+          <TextBlock Text="Eindrücke / Ergänzungen" FontSize="12" Opacity="0.7"/>
+          <TextBox Text="{Binding Impressions}" AcceptsReturn="True" Height="100" TextWrapping="Wrap"/>
+        </StackPanel>
+      </StackPanel>
+    </ScrollViewer>
+
+    <Grid Grid.Row="1" ColumnDefinitions="*,8,*" Margin="0,20,0,0">
+      <Button Grid.Column="0" Content="Abbrechen" HorizontalAlignment="Stretch" Click="OnCancel"/>
+      <Button Grid.Column="2" Content="Protokoll speichern" HorizontalAlignment="Stretch" Click="OnSave"/>
+    </Grid>
+  </Grid>
+</Window>

LehrerApp.Desktop/Views/Students/ParentCallSessionDialog.axaml.cs

@@ -0,0 +1,21 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using LehrerApp.Desktop.ViewModels.Students;
+
+namespace LehrerApp.Desktop.Views.Students;
+
+public partial class ParentCallSessionDialog : Window
+{
+    public ParentCallSessionDialog() => InitializeComponent();
+
+    private void OnSave(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is ParentCallSessionViewModel vm)
+        {
+            vm.SaveProtocol();
+            Close(true);
+        }
+    }
+
+    private void OnCancel(object? sender, RoutedEventArgs e) => Close(false);
+}

LehrerApp.Desktop/Views/Students/StudentDetailView.axaml

@@ -131,6 +131,18 @@
         <ScrollViewer Padding="20">
           <StackPanel Spacing="20">
             <TextBlock Text="Notenentwicklung" FontSize="15" FontWeight="SemiBold"/>
+            <StackPanel Orientation="Horizontal" Spacing="16">
+              <StackPanel Orientation="Horizontal" Spacing="5">
+                <Border Width="10" Height="10" CornerRadius="2"
+                        Background="{DynamicResource SystemControlBackgroundAccentBrush}"/>
+                <TextBlock Text="normal" FontSize="11" Opacity="0.6"/>
+              </StackPanel>
+              <StackPanel Orientation="Horizontal" Spacing="5">
+                <Border Width="10" Height="10" CornerRadius="2" Background="#E53935"/>
+                <TextBlock Text="Auffälligkeit (Notenabfall ≥ 1 Note oder mangelhaft/ungenügend)"
+                           FontSize="11" Opacity="0.6"/>
+              </StackPanel>
+            </StackPanel>
 
             <ItemsControl ItemsSource="{Binding GradeHistory}">
               <ItemsControl.ItemTemplate>
@@ -160,6 +172,8 @@
                                       Classes.warning="{Binding IsWarning}"/>
                               <TextBlock Text="{Binding Value}" FontSize="11" FontWeight="SemiBold"
                                          HorizontalAlignment="Center" Margin="0,3,0,0"/>
+                              <TextBlock Text="{Binding Label}" FontSize="9" Opacity="0.6"
+                                         HorizontalAlignment="Center" TextWrapping="Wrap" TextAlignment="Center"/>
                               <TextBlock Text="{Binding DateDisplay}" FontSize="9" Opacity="0.5"
                                          HorizontalAlignment="Center"/>
                             </StackPanel>
@@ -188,27 +202,101 @@
 
       <ContentPage Header="Dokumentation">
         <ScrollViewer Padding="20">
-          <StackPanel>
+          <StackPanel Spacing="16">
+
+            <!-- Fehlzeitenbilanz (5.2.2/5.2.3) — Auswertung der Anwesenheitsdaten aus der
+                 Mitarbeit-Erfassung, keine eigene Erfassung. -->
+            <Border Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
+                    CornerRadius="6" Padding="14,12" IsVisible="{Binding Attendance, Converter={x:Static ObjectConverters.IsNotNull}}">
+              <StackPanel Spacing="6">
+                <TextBlock Text="Fehlzeitenbilanz (laufendes Schuljahr)" FontSize="13" FontWeight="SemiBold"/>
+                <TextBlock FontSize="12" Opacity="0.75">
+                  <Run Text="{Binding Attendance.TotalChecked}"/>
+                  <Run Text=" kontrollierte Stunden · "/>
+                  <Run Text="{Binding Attendance.Excused}"/>
+                  <Run Text=" entschuldigt · "/>
+                  <Run Text="{Binding Attendance.Unexcused}"/>
+                  <Run Text=" unentschuldigt · "/>
+                  <Run Text="{Binding Attendance.ExcusePending}"/>
+                  <Run Text=" Entschuldigung offen"/>
+                </TextBlock>
+                <TextBlock FontSize="12" Foreground="Red" FontWeight="SemiBold"
+                           IsVisible="{Binding Attendance.ExceedsThreshold}">
+                  <Run Text="Fehlquote "/>
+                  <Run Text="{Binding Attendance.AbsenceRatePercent}"/>
+                  <Run Text=" % — über dem Schwellenwert von 20 %."/>
+                </TextBlock>
+              </StackPanel>
+            </Border>
+
+            <Grid ColumnDefinitions="*,Auto,Auto">
+              <TextBlock Grid.Column="0" Text="Einträge" FontSize="14" FontWeight="SemiBold" VerticalAlignment="Center"/>
+              <Button Grid.Column="1" Content="Datenauskunft exportieren" FontSize="12" Padding="10,4"
+                      Margin="0,0,8,0" Command="{Binding ExportPersonalDataCommand}"
+                      ToolTip.Tip="Alle gespeicherten Daten dieses Schülers als JSON-Datei exportieren (Art. 15 DSGVO)"/>
+              <Button Grid.Column="2" Content="＋ Eintrag" Command="{Binding AddDocumentationCommand}"/>
+            </Grid>
+            <TextBlock Text="{Binding ExportStatus}" Foreground="Green" FontSize="12"
+                       IsVisible="{Binding ExportStatus, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+
             <ItemsControl ItemsSource="{Binding Documentation}">
               <ItemsControl.ItemTemplate>
-                <DataTemplate DataType="vm:DocEntry">
+                <DataTemplate DataType="vm:DocumentationItem">
                   <Border Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                           CornerRadius="6" Padding="12,10" Margin="0,0,0,8">
-                    <Grid ColumnDefinitions="80,*,Auto">
-                      <TextBlock Grid.Column="0" Text="{Binding Date}" Opacity="0.5" FontSize="12"/>
-                      <StackPanel Grid.Column="1" Margin="8,0">
-                        <TextBlock Text="{Binding Title}" FontWeight="SemiBold" FontSize="13"/>
-                        <TextBlock Text="{Binding TypeLabel}" FontSize="11" Opacity="0.5"/>
+                    <StackPanel Spacing="4">
+                      <Grid ColumnDefinitions="80,*,Auto,Auto,Auto">
+                        <TextBlock Grid.Column="0" Text="{Binding DateDisplay}" Opacity="0.5" FontSize="12"/>
+                        <StackPanel Grid.Column="1" Margin="8,0">
+                          <TextBlock Text="{Binding Model.Title}" FontWeight="SemiBold" FontSize="13"
+                                     IsVisible="{Binding IsRevealed}"/>
+                          <TextBlock Text="Vertraulich" FontWeight="SemiBold" FontSize="13" Opacity="0.6"
+                                     IsVisible="{Binding !IsRevealed}"/>
+                          <TextBlock Text="{Binding TypeLabel}" FontSize="11" Opacity="0.5"/>
+                        </StackPanel>
+                        <TextBlock Grid.Column="2" Text="🔒" FontSize="14" VerticalAlignment="Center"
+                                   IsVisible="{Binding IsConfidential}" ToolTip.Tip="Vertraulich"/>
+                        <Button Grid.Column="3" Content="Anzeigen" FontSize="11" Padding="8,3" Margin="6,0,0,0"
+                                Command="{Binding RevealCommand}" IsVisible="{Binding !IsRevealed}"/>
+                        <StackPanel Grid.Column="4" Orientation="Horizontal" Spacing="4" Margin="6,0,0,0"
+                                    IsVisible="{Binding IsRevealed}">
+                          <Button Content="Gespräch begleiten" FontSize="11" Padding="8,3"
+                                  IsVisible="{Binding IsParentCall}"
+                                  Command="{Binding $parent[ItemsControl].((vm:StudentDetailViewModel)DataContext).ConductParentCallCommand}"
+                                  CommandParameter="{Binding}"/>
+                          <Button Content="Bearbeiten" FontSize="11" Padding="8,3"
+                                  Command="{Binding $parent[ItemsControl].((vm:StudentDetailViewModel)DataContext).EditDocumentationCommand}"
+                                  CommandParameter="{Binding}"/>
+                          <Button Content="Löschen" FontSize="11" Padding="8,3"
+                                  Command="{Binding $parent[ItemsControl].((vm:StudentDetailViewModel)DataContext).DeleteDocumentationCommand}"
+                                  CommandParameter="{Binding}"/>
+                        </StackPanel>
+                      </Grid>
+                      <TextBlock Text="{Binding Model.Content}" FontSize="12" TextWrapping="Wrap" Opacity="0.8"
+                                 IsVisible="{Binding IsRevealed}"/>
+                      <StackPanel Orientation="Horizontal" Spacing="8" IsVisible="{Binding IsRevealed}">
+                        <TextBlock Text="{Binding StatusLabel}" FontSize="11" Opacity="0.55"
+                                   IsVisible="{Binding StatusLabel, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+                        <TextBlock Text="📎 Anhang" FontSize="11" Opacity="0.55" IsVisible="{Binding HasAttachments}"/>
                       </StackPanel>
-                      <TextBlock Grid.Column="2" Text="🔒" FontSize="14"
-                                 IsVisible="{Binding IsConfidential}"
-                                 ToolTip.Tip="Vertraulich"/>
-                    </Grid>
+                      <ItemsControl ItemsSource="{Binding TagChips}" IsVisible="{Binding IsRevealed}">
+                        <ItemsControl.ItemsPanel>
+                          <ItemsPanelTemplate><WrapPanel ItemSpacing="6" LineSpacing="4"/></ItemsPanelTemplate>
+                        </ItemsControl.ItemsPanel>
+                        <ItemsControl.ItemTemplate>
+                          <DataTemplate DataType="vm:TagChip">
+                            <Border Background="{Binding ColorHex}" CornerRadius="10" Padding="8,2">
+                              <TextBlock Text="{Binding Text}" FontSize="10" Foreground="White"/>
+                            </Border>
+                          </DataTemplate>
+                        </ItemsControl.ItemTemplate>
+                      </ItemsControl>
+                    </StackPanel>
                   </Border>
                 </DataTemplate>
               </ItemsControl.ItemTemplate>
             </ItemsControl>
-            <TextBlock Text="Keine Dokumentation vorhanden." Opacity="0.4"
+            <TextBlock Text="Keine Dokumentation vorhanden." Classes="emptyhint"
                        IsVisible="{Binding !Documentation.Count}"/>
           </StackPanel>
         </ScrollViewer>

LehrerApp.Desktop/Views/Students/StudentDetailView.axaml.cs

@@ -1,7 +1,11 @@
 using Avalonia.Controls;
 using Avalonia.Input;
+using Avalonia.Platform.Storage;
+using LehrerApp.Core.Interfaces;
 using LehrerApp.Core.Models;
 using LehrerApp.Desktop.ViewModels.Students;
+using LehrerApp.Desktop.Views.Shared;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace LehrerApp.Desktop.Views.Students;
 
@@ -15,6 +19,10 @@ public partial class StudentDetailView : UserControl
         if (DataContext is not StudentDetailViewModel vm) return;
         vm.OnEditContact = ShowContactDialog;
         vm.OnViewAddress = ShowAddressViewer;
+        vm.OnEditDocumentation = ShowDocumentationDialog;
+        vm.OnConfirmDeleteDocumentation = ShowDeleteDocumentationDialog;
+        vm.OnSaveExportFile = SaveExportFile;
+        vm.OnConductParentCall = ShowParentCallSessionDialog;
     }
 
     private async Task<Contact?> ShowContactDialog(Contact? contact)
@@ -45,4 +53,57 @@ public partial class StudentDetailView : UserControl
             vm.ViewSelectedAddressCommand.CanExecute(null))
             vm.ViewSelectedAddressCommand.Execute(null);
     }
+
+    private async Task<Documentation?> ShowDocumentationDialog(Guid studentId, Documentation? editing)
+    {
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is null) return null;
+
+        var vm = new DocumentationDialogViewModel(studentId, editing,
+            App.Services.GetRequiredService<IAttachmentStorage>());
+        var dialog = new DocumentationDialog { DataContext = vm };
+        var saved = await dialog.ShowDialog<bool>(owner);
+        if (!saved) vm.DiscardUnsavedAttachments();
+        return saved ? vm.Result : null;
+    }
+
+    private async Task<Documentation?> ShowParentCallSessionDialog(Documentation documentation, string studentTitle)
+    {
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is null) return null;
+
+        var vm = new ParentCallSessionViewModel(documentation, studentTitle);
+        var dialog = new ParentCallSessionDialog { DataContext = vm };
+        var saved = await dialog.ShowDialog<bool>(owner);
+        return saved ? vm.Result : null;
+    }
+
+    private async Task<bool> ShowDeleteDocumentationDialog(DocumentationItem item)
+    {
+        var info = new ConfirmDialogInfo
+        {
+            Title       = "Eintrag löschen?",
+            Message     = $"\"{item.Model.Title}\" wird als gelöscht markiert und nicht mehr angezeigt.",
+            ConfirmText = "Löschen",
+        };
+        var dialog = new ConfirmDialog { DataContext = info };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        return owner is not null && await dialog.ShowDialog<bool>(owner);
+    }
+
+    private async Task SaveExportFile(string json)
+    {
+        var topLevel = TopLevel.GetTopLevel(this);
+        if (topLevel is null || DataContext is not StudentDetailViewModel vm || vm.Student is null) return;
+
+        var file = await topLevel.StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
+        {
+            Title             = "Datenauskunft exportieren",
+            SuggestedFileName = $"Datenauskunft_{vm.Student.LastName}_{vm.Student.FirstName}.json",
+            FileTypeChoices   = [new FilePickerFileType("JSON-Dateien") { Patterns = ["*.json"] }],
+        });
+
+        if (file is null) return;
+        await File.WriteAllTextAsync(file.Path.LocalPath, json);
+    }
 }