Mitarbeit bewerten begonnen, Schülerdaten, Gruppen

2026-06-23 10:12:52 +02:00
parent fdbaa9ef4d
commit b2211270b4
32 changed files with 1968 additions and 49 deletions
@@ -0,0 +1,33 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Groups"
+        x:Class="LehrerApp.Desktop.Views.Groups.AddSessionDialog"
+        x:DataType="vm:AddSessionDialogViewModel"
+        Title="Bewertungszeitpunkt anlegen"
+        Width="380" SizeToContent="Height"
+        CanResize="False" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="*,Auto" Margin="24">
+    <StackPanel Grid.Row="0" Spacing="14">
+      <TextBlock Text="Neuer Bewertungszeitpunkt" FontSize="18" FontWeight="SemiBold"/>
+
+      <StackPanel Spacing="4">
+        <TextBlock Text="Datum *" FontSize="12" Opacity="0.7"/>
+        <TextBox Text="{Binding DateText}" PlaceholderText="TT.MM.JJJJ" x:Name="DateBox"/>
+      </StackPanel>
+
+      <StackPanel Spacing="4">
+        <TextBlock Text="Kommentar (optional)" FontSize="12" Opacity="0.7"/>
+        <TextBox Text="{Binding Comment}" PlaceholderText="z. B. Stunde 12 – Säure-Base-Reaktion"/>
+      </StackPanel>
+
+      <TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
+                 IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+    </StackPanel>
+
+    <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="Anlegen"    HorizontalAlignment="Stretch" Click="OnSave"/>
+    </Grid>
+  </Grid>
+</Window>
@@ -0,0 +1,27 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using LehrerApp.Desktop.ViewModels.Groups;
+
+namespace LehrerApp.Desktop.Views.Groups;
+
+public partial class AddSessionDialog : Window
+{
+    public AddSessionDialog() => InitializeComponent();
+
+    protected override void OnOpened(EventArgs e)
+    {
+        base.OnOpened(e);
+        this.FindControl<TextBox>("DateBox")?.Focus();
+    }
+
+    private void OnSave(object? s, RoutedEventArgs e)
+    {
+        if (DataContext is AddSessionDialogViewModel vm && vm.SaveCommand.CanExecute(null))
+        {
+            vm.SaveCommand.Execute(null);
+            if (vm.Result is not null) Close(true);
+        }
+    }
+
+    private void OnCancel(object? s, RoutedEventArgs e) => Close(false);
+}
@@ -0,0 +1,43 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Groups"
+        x:Class="LehrerApp.Desktop.Views.Groups.AddStudentToGroupDialog"
+        x:DataType="vm:AddStudentToGroupDialogViewModel"
+        Title="Schüler hinzufügen"
+        Width="420" Height="500"
+        CanResize="False" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="Auto,*,Auto" Margin="24">
+
+    <!-- Überschrift + Suche -->
+    <StackPanel Grid.Row="0" Spacing="12" Margin="0,0,0,12">
+      <TextBlock Text="Schüler zur Gruppe hinzufügen" FontSize="18" FontWeight="SemiBold"/>
+      <TextBox Text="{Binding SearchText}"
+               PlaceholderText="Schüler suchen …"
+               x:Name="SearchBox"/>
+    </StackPanel>
+
+    <!-- Schülerliste -->
+    <ListBox Grid.Row="1"
+             ItemsSource="{Binding AvailableStudents}"
+             SelectedItem="{Binding SelectedStudent}"
+             BorderThickness="1">
+      <ListBox.ItemTemplate>
+        <DataTemplate x:DataType="vm:StudentPickerItem">
+          <TextBlock Text="{Binding FullName}" Padding="4,2"/>
+        </DataTemplate>
+      </ListBox.ItemTemplate>
+    </ListBox>
+
+    <!-- Validation + Buttons -->
+    <StackPanel Grid.Row="2" Spacing="12" Margin="0,16,0,0">
+      <TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
+                 IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+      <Grid ColumnDefinitions="*,8,*">
+        <Button Grid.Column="0" Content="Abbrechen" HorizontalAlignment="Stretch" Click="OnCancel"/>
+        <Button Grid.Column="2" Content="Hinzufügen" HorizontalAlignment="Stretch" Click="OnSave"/>
+      </Grid>
+    </StackPanel>
+
+  </Grid>
+</Window>
@@ -0,0 +1,27 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using LehrerApp.Desktop.ViewModels.Groups;
+
+namespace LehrerApp.Desktop.Views.Groups;
+
+public partial class AddStudentToGroupDialog : Window
+{
+    public AddStudentToGroupDialog() => InitializeComponent();
+
+    protected override void OnOpened(EventArgs e)
+    {
+        base.OnOpened(e);
+        this.FindControl<TextBox>("SearchBox")?.Focus();
+    }
+
+    private void OnSave(object? s, RoutedEventArgs e)
+    {
+        if (DataContext is AddStudentToGroupDialogViewModel vm && vm.SaveCommand.CanExecute(null))
+        {
+            vm.SaveCommand.Execute(null);
+            if (vm.Result is not null) Close(true);
+        }
+    }
+
+    private void OnCancel(object? s, RoutedEventArgs e) => Close(false);
+}
@@ -1,6 +1,7 @@
 <UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Groups"
+             xmlns:views="clr-namespace:LehrerApp.Desktop.Views.Groups"
             x:Class="LehrerApp.Desktop.Views.Groups.GroupDetailView"
             x:DataType="vm:GroupDetailViewModel">

@@ -20,17 +21,14 @@
            <Run Text="{Binding StudentCount}"/>
            <Run Text=" Schüler"/>
          </TextBlock>
-          <Button Content="＋ Schüler" Command="{Binding AddStudentCommand}"/>
-          <Button Content="＋ Klausur" Command="{Binding AddExamCommand}"/>
+          <Button Content="＋ Schüler"   Command="{Binding AddStudentCommand}"/>
+          <Button Content="− Austragen"  Command="{Binding RemoveStudentCommand}"
+                  IsVisible="{Binding SelectedStudent, Converter={x:Static ObjectConverters.IsNotNull}}"/>
+          <Button Content="＋ Klausur"   Command="{Binding AddExamCommand}"/>
        </StackPanel>
      </Grid>
    </Border>

-    <!--
-      Avalonia 12: TabbedPage ersetzt manuelles Tab-System.
-      Kein ActiveTab-Property, kein IsVisible-Binding, keine eigenen Tab-Buttons.
-      TabPlacement="Top" → Tabs oben (wie Browser-Tabs).
-    -->
    <TabbedPage Grid.Row="1" TabPlacement="Top" SelectedIndex="{Binding ActiveTabIndex}">

      <!-- Tab: Übersicht -->
@@ -47,6 +45,7 @@
      <!-- Tab: Schüler -->
      <ContentPage Header="Schüler">
        <DataGrid ItemsSource="{Binding Students}"
+                  SelectedItem="{Binding SelectedStudent}"
                  AutoGenerateColumns="False"
                  IsReadOnly="True"
                  GridLinesVisibility="Horizontal"
@@ -61,6 +60,11 @@
        </DataGrid>
      </ContentPage>

+      <!-- Tab: Mitarbeit -->
+      <ContentPage Header="Mitarbeit">
+        <views:ParticipationTabView DataContext="{Binding ParticipationTab}"/>
+      </ContentPage>
+
      <!-- Tab: Klausuren -->
      <ContentPage Header="Klausuren">
        <DataGrid ItemsSource="{Binding Exams}"
@@ -1,3 +1,35 @@
 using Avalonia.Controls;
+using LehrerApp.Core.Interfaces;
+using LehrerApp.Desktop.ViewModels.Groups;
+using Microsoft.Extensions.DependencyInjection;
+
 namespace LehrerApp.Desktop.Views.Groups;
-public partial class GroupDetailView : UserControl { public GroupDetailView() => InitializeComponent(); }
+
+public partial class GroupDetailView : UserControl
+{
+    public GroupDetailView() => InitializeComponent();
+
+    protected override void OnDataContextChanged(EventArgs e)
+    {
+        base.OnDataContextChanged(e);
+        if (DataContext is GroupDetailViewModel vm)
+            vm.OnAddStudent = ShowAddStudentDialog;
+    }
+
+    private async Task<bool> ShowAddStudentDialog()
+    {
+        if (DataContext is not GroupDetailViewModel vm || vm.Group is null) return false;
+
+        var dialogVm = new AddStudentToGroupDialogViewModel(
+            App.Services.GetRequiredService<IStudentRepository>(),
+            App.Services.GetRequiredService<IEnrollmentRepository>(),
+            vm.Group.Id,
+            vm.Group.SchoolYear);
+
+        var dialog = new AddStudentToGroupDialog { DataContext = dialogVm };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is null) return false;
+
+        return await dialog.ShowDialog<bool>(owner);
+    }
+}
@@ -66,7 +66,7 @@
      <!-- Rechte Spalte: Platzhalter wenn keine Auswahl -->
      <StackPanel Grid.Column="1" HorizontalAlignment="Center"
                  VerticalAlignment="Center" Spacing="8"
-                  IsVisible="{Binding !SelectedGroup}">
+                  IsVisible="{Binding SelectedGroup, Converter={x:Static ObjectConverters.IsNull}}">
        <TextBlock Text="Gruppe auswählen" FontSize="16" Opacity="0.4"
                   HorizontalAlignment="Center"/>
        <TextBlock Text="oder ＋ Neue Gruppe anlegen" FontSize="12" Opacity="0.3"
@@ -74,14 +74,15 @@
      </StackPanel>

      <!-- Rechte Spalte: Gruppen-Übersicht wenn ausgewählt -->
-      <ScrollViewer Grid.Column="1" IsVisible="{Binding SelectedGroup}">
+      <ScrollViewer Grid.Column="1"
+                    IsVisible="{Binding SelectedGroup, Converter={x:Static ObjectConverters.IsNotNull}}">
        <StackPanel Margin="28,24" Spacing="20">

          <!-- Gruppenname und Kurzinfos -->
          <StackPanel Spacing="4">
-            <TextBlock Text="{Binding SelectedGroup.DisplayName}"
+            <TextBlock Text="{Binding SelectedGroupDisplayName}"
                       FontSize="24" FontWeight="SemiBold" TextWrapping="Wrap"/>
-            <TextBlock Text="{Binding SelectedGroup.Subtitle}"
+            <TextBlock Text="{Binding SelectedGroupSubtitle}"
                       FontSize="12" Opacity="0.55"/>
          </StackPanel>

@@ -0,0 +1,57 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Groups"
+        x:Class="LehrerApp.Desktop.Views.Groups.ParticipationQuickInputDialog"
+        x:DataType="vm:QuickInputViewModel"
+        Title="Schnelleingabe Mitarbeit"
+        Width="420" SizeToContent="Height"
+        CanResize="False" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="Auto,*,Auto" Margin="24">
+
+    <!-- Schülername + Fortschritt -->
+    <Grid Grid.Row="0" ColumnDefinitions="*,Auto" Margin="0,0,0,16">
+      <StackPanel Grid.Column="0">
+        <TextBlock Text="{Binding StudentName}" FontSize="22" FontWeight="SemiBold"/>
+        <TextBlock Text="{Binding CurrentAspectLabel}" FontSize="13" Opacity="0.5"/>
+      </StackPanel>
+      <TextBlock Grid.Column="1" Text="{Binding ProgressText}"
+                 VerticalAlignment="Top" FontSize="13" Opacity="0.4"/>
+    </Grid>
+
+    <!-- Aspektliste -->
+    <ItemsControl Grid.Row="1" ItemsSource="{Binding AspectRows}">
+      <ItemsControl.ItemTemplate>
+        <DataTemplate x:DataType="vm:QuickAspectRow">
+          <Grid ColumnDefinitions="4,8,*,44" Margin="0,3">
+            <!-- Aktiv-Balken links -->
+            <Border Grid.Column="0" CornerRadius="2"
+                    Background="{DynamicResource SystemAccentColor}"
+                    IsVisible="{Binding IsActive}"/>
+            <!-- Index-Badge -->
+            <TextBlock Grid.Column="1" Text="{Binding Index, StringFormat='[{0}]'}"
+                       FontFamily="Monospace" FontSize="11" Opacity="0.4"
+                       VerticalAlignment="Center" Margin="0,0,6,0"/>
+            <!-- Aspektname: bold wenn aktiv, gedimmt wenn nicht -->
+            <TextBlock Grid.Column="2" Text="{Binding Label}" FontWeight="SemiBold"
+                       IsVisible="{Binding IsActive}" VerticalAlignment="Center"/>
+            <TextBlock Grid.Column="2" Text="{Binding Label}" Opacity="0.55"
+                       IsVisible="{Binding IsActive, Converter={x:Static BoolConverters.Not}}"
+                       VerticalAlignment="Center"/>
+            <!-- Aktueller Wert -->
+            <TextBlock Grid.Column="3" Text="{Binding DisplayLabel}"
+                       FontFamily="Monospace" FontSize="16" FontWeight="Bold"
+                       TextAlignment="Right" VerticalAlignment="Center"/>
+          </Grid>
+        </DataTemplate>
+      </ItemsControl.ItemTemplate>
+    </ItemsControl>
+
+    <!-- Tastenkürzel-Legende + Schließen-Button -->
+    <StackPanel Grid.Row="2" Margin="0,16,0,0" Spacing="6">
+      <TextBlock Opacity="0.35" FontSize="11" TextWrapping="Wrap"
+                 Text="1–5 bewerten  ·  Q/W/E/R/T Aspekt wählen  ·  Leertaste nächster Aspekt  ·  Enter nächster Schüler  ·  Backspace vorheriger  ·  +/− anpassen  ·  Esc schließen"/>
+      <Button Content="Schließen" HorizontalAlignment="Stretch" Click="OnClose"/>
+    </StackPanel>
+  </Grid>
+</Window>
@@ -0,0 +1,54 @@
+using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+using LehrerApp.Desktop.ViewModels.Groups;
+
+namespace LehrerApp.Desktop.Views.Groups;
+
+public partial class ParticipationQuickInputDialog : Window
+{
+    public ParticipationQuickInputDialog() => InitializeComponent();
+
+    protected override void OnOpened(EventArgs e)
+    {
+        base.OnOpened(e);
+        Focus();
+    }
+
+    protected override void OnKeyDown(KeyEventArgs e)
+    {
+        if (DataContext is not QuickInputViewModel vm) { base.OnKeyDown(e); return; }
+
+        switch (e.Key)
+        {
+            case Key.D1 or Key.NumPad1: vm.SetRatingByNumber(1); e.Handled = true; break;
+            case Key.D2 or Key.NumPad2: vm.SetRatingByNumber(2); e.Handled = true; break;
+            case Key.D3 or Key.NumPad3: vm.SetRatingByNumber(3); e.Handled = true; break;
+            case Key.D4 or Key.NumPad4: vm.SetRatingByNumber(4); e.Handled = true; break;
+            case Key.D5 or Key.NumPad5: vm.SetRatingByNumber(5); e.Handled = true; break;
+
+            case Key.Q: vm.SelectAspect(0); e.Handled = true; break;
+            case Key.W: vm.SelectAspect(1); e.Handled = true; break;
+            case Key.E: vm.SelectAspect(2); e.Handled = true; break;
+            case Key.R: vm.SelectAspect(3); e.Handled = true; break;
+            case Key.T: vm.SelectAspect(4); e.Handled = true; break;
+
+            case Key.Space:   vm.NextAspect();     e.Handled = true; break;
+            case Key.Enter:
+                if (vm.IsLastStudent) Close();
+                else vm.NextStudent();
+                e.Handled = true;
+                break;
+            case Key.Back:    vm.PreviousStudent(); e.Handled = true; break;
+
+            case Key.OemPlus  or Key.Add:      vm.IncrementRating(); e.Handled = true; break;
+            case Key.OemMinus or Key.Subtract: vm.DecrementRating(); e.Handled = true; break;
+
+            case Key.Escape: Close(); e.Handled = true; break;
+
+            default: base.OnKeyDown(e); break;
+        }
+    }
+
+    private void OnClose(object? s, RoutedEventArgs e) => Close();
+}
@@ -0,0 +1,58 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Groups"
+             x:Class="LehrerApp.Desktop.Views.Groups.ParticipationTabView"
+             x:DataType="vm:ParticipationTabViewModel">
+
+  <Grid ColumnDefinitions="220,*">
+
+    <!-- Linke Seite: Sitzungsliste -->
+    <Border Grid.Column="0"
+            BorderBrush="{DynamicResource SystemControlForegroundBaseLowBrush}"
+            BorderThickness="0,0,1,0">
+    <Grid RowDefinitions="Auto,*">
+
+      <StackPanel Grid.Row="0" Orientation="Horizontal" Spacing="6" Margin="10,10,10,6">
+        <Button Content="＋ Sitzung" Command="{Binding AddSessionCommand}" HorizontalAlignment="Stretch"/>
+        <Button Content="Schnell" Command="{Binding QuickInputCommand}"/>
+      </StackPanel>
+
+      <ListBox Grid.Row="1"
+               ItemsSource="{Binding Sessions}"
+               SelectedItem="{Binding SelectedSession}"
+               BorderThickness="0">
+        <ListBox.ItemTemplate>
+          <DataTemplate x:DataType="vm:ParticipationSessionItem">
+            <TextBlock Text="{Binding Display}" TextWrapping="Wrap" Padding="4,3" FontSize="12"/>
+          </DataTemplate>
+        </ListBox.ItemTemplate>
+      </ListBox>
+    </Grid>
+    </Border>
+
+    <!-- Rechte Seite: Bewertungsraster (wird per Code-Behind aufgebaut) -->
+    <Grid Grid.Column="1" RowDefinitions="Auto,*">
+      <TextBlock Grid.Row="0"
+                 Text="{Binding SelectedSessionDisplay}"
+                 FontSize="13" FontWeight="SemiBold" Margin="12,10,12,4"
+                 IsVisible="{Binding SelectedSession, Converter={x:Static ObjectConverters.IsNotNull}}"/>
+
+      <!-- DataGrid: Spalten werden in ParticipationTabView.axaml.cs dynamisch erzeugt -->
+      <DataGrid Grid.Row="1"
+                x:Name="RatingGrid"
+                ItemsSource="{Binding StudentRows}"
+                AutoGenerateColumns="False"
+                IsReadOnly="True"
+                GridLinesVisibility="All"
+                CanUserReorderColumns="False"
+                CanUserResizeColumns="True"
+                IsVisible="{Binding SelectedSession, Converter={x:Static ObjectConverters.IsNotNull}}"/>
+
+      <TextBlock Grid.Row="1"
+                 Text="{Binding NoDataText}"
+                 HorizontalAlignment="Center" VerticalAlignment="Center"
+                 Opacity="0.35" FontSize="14"
+                 IsVisible="{Binding SelectedSession, Converter={x:Static ObjectConverters.IsNull}}"/>
+    </Grid>
+  </Grid>
+</UserControl>
@@ -0,0 +1,121 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using Avalonia.Data;
+using LehrerApp.Desktop.ViewModels.Groups;
+
+namespace LehrerApp.Desktop.Views.Groups;
+
+public partial class ParticipationTabView : UserControl
+{
+    private ParticipationTabViewModel? _vm;
+
+    public ParticipationTabView() => InitializeComponent();
+
+    protected override void OnDataContextChanged(EventArgs e)
+    {
+        base.OnDataContextChanged(e);
+
+        if (DataContext is ParticipationTabViewModel vm)
+        {
+            _vm = vm;
+            vm.OnAddSession = ShowAddSessionDialog;
+            vm.OnQuickInput = ShowQuickInputDialog;
+            vm.Aspects.CollectionChanged += (_, _) => BuildColumns();
+            BuildColumns();
+        }
+    }
+
+    private void BuildColumns()
+    {
+        var grid = this.FindControl<DataGrid>("RatingGrid");
+        if (grid is null || _vm is null) return;
+
+        grid.Columns.Clear();
+
+        grid.Columns.Add(new DataGridTextColumn
+        {
+            Header  = "Schüler",
+            Binding = new Binding("Name"),
+            Width   = new DataGridLength(160, DataGridLengthUnitType.Pixel),
+        });
+
+        foreach (var (aspect, i) in _vm.Aspects.Select((a, i) => (a, i)))
+        {
+            var capturedIndex = i;
+            grid.Columns.Add(new DataGridTemplateColumn
+            {
+                Header = $"{aspect.Label}  [{AspectShortcut(i)}]",
+                Width  = new DataGridLength(1, DataGridLengthUnitType.Star),
+                CellTemplate = BuildCellTemplate(capturedIndex),
+            });
+        }
+    }
+
+    private static IDataTemplate BuildCellTemplate(int aspectIndex)
+    {
+        return new FuncDataTemplate<ParticipationStudentRow>((row, _) =>
+        {
+            if (row is null) return new TextBlock();
+
+            var cell = row.Cells.ElementAtOrDefault(aspectIndex);
+            if (cell is null) return new TextBlock();
+
+            var panel = new StackPanel
+            {
+                Orientation = Avalonia.Layout.Orientation.Horizontal,
+                HorizontalAlignment = Avalonia.Layout.HorizontalAlignment.Center,
+                VerticalAlignment   = Avalonia.Layout.VerticalAlignment.Center,
+                Spacing = 2,
+                Margin  = new Avalonia.Thickness(0, 2),
+            };
+
+            foreach (var (label, val) in new[] { ("−−", -2), ("−", -1), ("∼", 0), ("+", 1), ("++", 2) })
+            {
+                var btn = new Button
+                {
+                    Content = label,
+                    Padding = new Avalonia.Thickness(5, 1),
+                    FontSize = 11,
+                    Opacity = cell.Value == val ? 1.0 : 0.3,
+                };
+                var capturedVal = val;
+                btn.Click += (_, _) => cell.SetValue(capturedVal);
+                cell.PropertyChanged += (_, pe) =>
+                {
+                    if (pe.PropertyName == nameof(RatingCell.Value))
+                        btn.Opacity = cell.Value == capturedVal ? 1.0 : 0.3;
+                };
+                panel.Children.Add(btn);
+            }
+
+            return panel;
+        });
+    }
+
+    private static string AspectShortcut(int i) => i switch
+    {
+        0 => "Q", 1 => "W", 2 => "E", 3 => "R", 4 => "T", _ => ""
+    };
+
+    private async Task<LehrerApp.Core.Models.ParticipationSession?> ShowAddSessionDialog()
+    {
+        var vm = new AddSessionDialogViewModel();
+        var dialog = new AddSessionDialog { DataContext = vm };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is null) return null;
+        var ok = await dialog.ShowDialog<bool>(owner);
+        return ok ? vm.Result : null;
+    }
+
+    private async Task ShowQuickInputDialog(ParticipationTabViewModel tabVm)
+    {
+        if (tabVm.StudentRows.Count == 0) return;
+        var quickVm = new QuickInputViewModel(
+            tabVm.StudentRows.ToList(),
+            tabVm.Aspects.ToList());
+        var dialog = new ParticipationQuickInputDialog { DataContext = quickVm };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is not null)
+            await dialog.ShowDialog(owner);
+    }
+}
@@ -62,7 +62,7 @@
        <Border DockPanel.Dock="Bottom" Padding="12,8"
                BorderBrush="{DynamicResource SystemControlForegroundBaseLowBrush}"
                BorderThickness="0,1,0,0">
-          <views:SyncStatusBar/>
+          <views:SyncStatusBar DataContext="{Binding SyncStatus}"/>
        </Border>

        <ScrollViewer>
@@ -0,0 +1,115 @@
+<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.AddStudentDialog"
+        x:DataType="vm:AddStudentDialogViewModel"
+        Title="Neuer Schüler"
+        Width="500" Height="640"
+        CanResize="True" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="*,Auto" Margin="24,20,24,20">
+
+    <ScrollViewer Grid.Row="0" VerticalScrollBarVisibility="Auto">
+      <StackPanel Spacing="14">
+
+        <TextBlock Text="Neuen Schüler anlegen" FontSize="18" FontWeight="SemiBold"/>
+
+        <!-- Name -->
+        <Grid ColumnDefinitions="*,10,*">
+          <StackPanel Grid.Column="0" Spacing="4">
+            <TextBlock Text="Nachname *" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding LastName}" PlaceholderText="Mustermann" x:Name="LastNameBox"/>
+          </StackPanel>
+          <StackPanel Grid.Column="2" Spacing="4">
+            <TextBlock Text="Vorname *" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding FirstName}" PlaceholderText="Max"/>
+          </StackPanel>
+        </Grid>
+
+        <!-- Geburtsdatum + Geschlecht -->
+        <Grid ColumnDefinitions="*,10,*">
+          <StackPanel Grid.Column="0" Spacing="4">
+            <TextBlock Text="Geburtsdatum" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding DateOfBirthText}" PlaceholderText="TT.MM.JJJJ"/>
+          </StackPanel>
+          <StackPanel Grid.Column="2" Spacing="4">
+            <TextBlock Text="Geschlecht" FontSize="12" Opacity="0.7"/>
+            <ComboBox ItemsSource="{Binding GenderOptions}"
+                      SelectedItem="{Binding SelectedGender}"
+                      HorizontalAlignment="Stretch"/>
+          </StackPanel>
+        </Grid>
+
+        <!-- Kontakte -->
+        <StackPanel Spacing="6">
+          <Grid ColumnDefinitions="*,Auto">
+            <TextBlock Grid.Column="0" Text="Kontakte" FontSize="14" FontWeight="SemiBold"
+                       VerticalAlignment="Center"/>
+            <Button Grid.Column="1" Content="＋ Kontakt" Command="{Binding AddContactCommand}"
+                    FontSize="12" Padding="8,4"/>
+          </Grid>
+
+          <ItemsControl ItemsSource="{Binding Contacts}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate x:DataType="vm:ContactEntryViewModel">
+                <Border Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
+                        CornerRadius="6" Padding="10,8" Margin="0,0,0,6">
+                  <StackPanel Spacing="6">
+                    <!-- Zeile 1: Name + Beziehung + Löschen -->
+                    <Grid ColumnDefinitions="*,10,*,10,Auto">
+                      <TextBox Grid.Column="0" Text="{Binding Name}"
+                               PlaceholderText="Name" FontSize="12"/>
+                      <ComboBox Grid.Column="2"
+                                ItemsSource="{Binding $parent[Window].DataContext.RelationPresets}"
+                                SelectedItem="{Binding Relation}"
+                                HorizontalAlignment="Stretch" FontSize="12"/>
+                      <Button Grid.Column="4" Content="×" Padding="6,2"
+                              Command="{Binding RemoveCommand}" FontSize="14"/>
+                    </Grid>
+                    <!-- Zeile 2: Telefon + E-Mail -->
+                    <Grid ColumnDefinitions="*,10,*">
+                      <TextBox Grid.Column="0" Text="{Binding Phone}"
+                               PlaceholderText="Telefon / Handy" FontSize="12"/>
+                      <TextBox Grid.Column="2" Text="{Binding Email}"
+                               PlaceholderText="E-Mail" FontSize="12"/>
+                    </Grid>
+                    <!-- Zeile 3: Adresse -->
+                    <TextBox Text="{Binding Street}" PlaceholderText="Straße und Hausnummer" FontSize="12"/>
+                    <Grid ColumnDefinitions="100,10,*">
+                      <TextBox Grid.Column="0" Text="{Binding PostalCode}"
+                               PlaceholderText="PLZ" FontSize="12"/>
+                      <TextBox Grid.Column="2" Text="{Binding City}"
+                               PlaceholderText="Ort" FontSize="12"/>
+                    </Grid>
+                  </StackPanel>
+                </Border>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+
+          <TextBlock Text="Noch keine Kontakte. Über ＋ Kontakt hinzufügen."
+                     Opacity="0.35" FontSize="12"
+                     IsVisible="{Binding !Contacts.Count}"/>
+        </StackPanel>
+
+        <!-- Notizen -->
+        <StackPanel Spacing="4">
+          <TextBlock Text="Notizen" FontSize="12" Opacity="0.7"/>
+          <TextBox Text="{Binding Notes}" PlaceholderText="Interne Anmerkungen …"
+                   AcceptsReturn="True" Height="70" TextWrapping="Wrap"/>
+        </StackPanel>
+
+        <!-- Validierungsfehler -->
+        <TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
+                   IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+      </StackPanel>
+    </ScrollViewer>
+
+    <!-- Buttons -->
+    <Grid Grid.Row="1" ColumnDefinitions="*,10,*" Margin="0,16,0,0">
+      <Button Grid.Column="0" Content="Abbrechen" HorizontalAlignment="Stretch" Click="OnCancel"/>
+      <Button Grid.Column="2" Content="Anlegen"   HorizontalAlignment="Stretch" Click="OnSave"/>
+    </Grid>
+
+  </Grid>
+</Window>
@@ -0,0 +1,27 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using LehrerApp.Desktop.ViewModels.Students;
+
+namespace LehrerApp.Desktop.Views.Students;
+
+public partial class AddStudentDialog : Window
+{
+    public AddStudentDialog() => InitializeComponent();
+
+    protected override void OnOpened(EventArgs e)
+    {
+        base.OnOpened(e);
+        this.FindControl<TextBox>("LastNameBox")?.Focus();
+    }
+
+    private void OnSave(object? s, RoutedEventArgs e)
+    {
+        if (DataContext is AddStudentDialogViewModel vm && vm.SaveCommand.CanExecute(null))
+        {
+            vm.SaveCommand.Execute(null);
+            if (vm.Result is not null) Close(true);
+        }
+    }
+
+    private void OnCancel(object? s, RoutedEventArgs e) => Close(false);
+}
@@ -0,0 +1,32 @@
+<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.AddressViewerWindow"
+        x:DataType="vm:ContactItem"
+        Title="Adresse"
+        Width="340" Height="230"
+        MinWidth="280" MinHeight="180"
+        CanResize="True"
+        ShowInTaskbar="False"
+        WindowStartupLocation="Manual">
+
+  <Grid RowDefinitions="Auto,*,Auto" Margin="18">
+    <StackPanel Grid.Row="0" Spacing="3">
+      <TextBlock Text="{Binding Name}" FontSize="16" FontWeight="SemiBold"/>
+      <TextBlock Text="{Binding Relation}" FontSize="12" Opacity="0.55"/>
+    </StackPanel>
+
+    <Border Grid.Row="1" Margin="0,14" Padding="12"
+            Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
+            CornerRadius="7">
+      <TextBox Text="{Binding Address}" IsReadOnly="True"
+               AcceptsReturn="True" TextWrapping="Wrap"
+               BorderThickness="0" Background="Transparent"
+               VerticalContentAlignment="Center"/>
+    </Border>
+
+    <TextBlock Grid.Row="2"
+               Text="Das Fenster kann verschoben und parallel weiter geöffnet bleiben."
+               FontSize="10" Opacity="0.45" TextWrapping="Wrap"/>
+  </Grid>
+</Window>
@@ -0,0 +1,18 @@
+using Avalonia;
+using Avalonia.Controls;
+
+namespace LehrerApp.Desktop.Views.Students;
+
+public partial class AddressViewerWindow : Window
+{
+    public AddressViewerWindow() => InitializeComponent();
+
+    protected override void OnOpened(EventArgs e)
+    {
+        base.OnOpened(e);
+        if (Owner is not Window owner) return;
+        Position = new PixelPoint(
+            owner.Position.X + Math.Max(20, (int)owner.Bounds.Width - (int)Width - 24),
+            owner.Position.Y + Math.Max(20, (int)owner.Bounds.Height - (int)Height - 48));
+    }
+}
@@ -0,0 +1,87 @@
+<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.ContactEditDialog"
+        x:DataType="vm:ContactEditDialogViewModel"
+        Title="{Binding DialogTitle}"
+        Width="520" Height="650"
+        MinWidth="460" MinHeight="560"
+        CanResize="True" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="*,Auto" Margin="24,20">
+    <ScrollViewer Grid.Row="0" VerticalScrollBarVisibility="Auto">
+      <StackPanel Spacing="16">
+        <TextBlock Text="{Binding DialogTitle}" FontSize="18" FontWeight="SemiBold"/>
+
+        <Grid ColumnDefinitions="*,10,*">
+          <StackPanel Grid.Column="0" Spacing="4">
+            <TextBlock Text="Name *" FontSize="12" Opacity="0.7"/>
+            <TextBox x:Name="NameBox" Text="{Binding Name}" PlaceholderText="Name"/>
+          </StackPanel>
+          <StackPanel Grid.Column="2" Spacing="4">
+            <TextBlock Text="Beziehung" FontSize="12" Opacity="0.7"/>
+            <ComboBox ItemsSource="{Binding RelationPresets}"
+                      SelectedItem="{Binding Relation}"
+                      HorizontalAlignment="Stretch"/>
+          </StackPanel>
+        </Grid>
+
+        <Grid ColumnDefinitions="*,10,*">
+          <StackPanel Grid.Column="0" Spacing="4">
+            <TextBlock Text="Telefon" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding Phone}" PlaceholderText="Telefon / Handy"/>
+          </StackPanel>
+          <StackPanel Grid.Column="2" Spacing="4">
+            <TextBlock Text="E-Mail" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding Email}" PlaceholderText="E-Mail"/>
+          </StackPanel>
+        </Grid>
+
+        <StackPanel Spacing="8">
+          <TextBlock Text="Adresse" FontSize="14" FontWeight="SemiBold"/>
+          <TextBox Text="{Binding Street}" PlaceholderText="Straße und Hausnummer"/>
+          <Grid ColumnDefinitions="110,10,*">
+            <TextBox Grid.Column="0" Text="{Binding PostalCode}" PlaceholderText="PLZ"/>
+            <TextBox Grid.Column="2" Text="{Binding City}" PlaceholderText="Ort"/>
+          </Grid>
+        </StackPanel>
+
+        <Separator/>
+
+        <CheckBox Content="Dieser Kontakt gilt nicht mehr"
+                  IsChecked="{Binding IsInvalid}"/>
+
+        <StackPanel Spacing="10" IsVisible="{Binding IsInvalid}">
+          <Grid ColumnDefinitions="*,10,*">
+            <StackPanel Grid.Column="0" Spacing="4">
+              <TextBlock Text="Ungültig seit *" FontSize="12" Opacity="0.7"/>
+              <TextBox Text="{Binding InvalidSinceText}" PlaceholderText="TT.MM.JJJJ"/>
+            </StackPanel>
+            <StackPanel Grid.Column="2" Spacing="4">
+              <TextBlock Text="Grund" FontSize="12" Opacity="0.7"/>
+              <ComboBox ItemsSource="{Binding InvalidReasonOptions}"
+                        SelectedItem="{Binding SelectedInvalidReason}"
+                        HorizontalAlignment="Stretch"/>
+            </StackPanel>
+          </Grid>
+          <StackPanel Spacing="4">
+            <TextBlock Text="Ergänzung zum Grund" FontSize="12" Opacity="0.7"/>
+            <TextBox Text="{Binding InvalidReasonDetails}"
+                     PlaceholderText="Optionaler Hinweis"
+                     AcceptsReturn="True" Height="60" TextWrapping="Wrap"/>
+          </StackPanel>
+        </StackPanel>
+
+        <TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
+                   IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+      </StackPanel>
+    </ScrollViewer>
+
+    <Grid Grid.Row="1" ColumnDefinitions="*,10,*" Margin="0,18,0,0">
+      <Button Grid.Column="0" Content="Abbrechen" HorizontalAlignment="Stretch"
+              Click="OnCancel"/>
+      <Button Grid.Column="2" Content="Speichern" HorizontalAlignment="Stretch"
+              Click="OnSave"/>
+    </Grid>
+  </Grid>
+</Window>
@@ -0,0 +1,25 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using LehrerApp.Desktop.ViewModels.Students;
+
+namespace LehrerApp.Desktop.Views.Students;
+
+public partial class ContactEditDialog : Window
+{
+    public ContactEditDialog() => InitializeComponent();
+
+    protected override void OnOpened(EventArgs e)
+    {
+        base.OnOpened(e);
+        this.FindControl<TextBox>("NameBox")?.Focus();
+    }
+
+    private void OnSave(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is not ContactEditDialogViewModel vm) return;
+        vm.SaveCommand.Execute(null);
+        if (vm.Result is not null) Close(true);
+    }
+
+    private void OnCancel(object? sender, RoutedEventArgs e) => Close(false);
+}
@@ -60,6 +60,74 @@
        </ScrollViewer>
      </ContentPage>

+      <ContentPage Header="Kontakte">
+        <Grid RowDefinitions="Auto,*" Margin="20">
+          <Grid Grid.Row="0" ColumnDefinitions="*,Auto,Auto,Auto" Margin="0,0,0,10">
+            <TextBlock Grid.Column="0" Text="Kontaktdaten" FontSize="15"
+                       FontWeight="SemiBold" VerticalAlignment="Center"/>
+            <Button Grid.Column="1" Content="＋ Neu" Command="{Binding AddContactCommand}"
+                    Margin="0,0,8,0"/>
+            <Button Grid.Column="2" Content="Bearbeiten" Command="{Binding EditContactCommand}"
+                    Margin="0,0,8,0"/>
+            <Button Grid.Column="3" Content="Adresse anzeigen"
+                    Command="{Binding ViewSelectedAddressCommand}"/>
+          </Grid>
+
+          <ListBox Grid.Row="1" x:Name="ContactList"
+                   ItemsSource="{Binding Contacts}"
+                   SelectedItem="{Binding SelectedContact}"
+                   DoubleTapped="OnContactDoubleTapped">
+            <ListBox.ItemTemplate>
+                <DataTemplate x:DataType="vm:ContactItem">
+                  <Border Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
+                          CornerRadius="8" Padding="14,10" Margin="2,3">
+                    <Grid ColumnDefinitions="220,*,Auto" RowDefinitions="Auto,Auto">
+                      <StackPanel Grid.Column="0" Grid.RowSpan="2" Spacing="4">
+                        <TextBlock Text="{Binding Name}" FontWeight="SemiBold" FontSize="14"
+                                   TextWrapping="Wrap"/>
+                        <Border Background="{DynamicResource SystemControlForegroundBaseLowBrush}"
+                                CornerRadius="4" Padding="6,2" HorizontalAlignment="Left">
+                          <TextBlock Text="{Binding Relation}" FontSize="11" Opacity="0.7"/>
+                        </Border>
+                      </StackPanel>
+
+                      <StackPanel Grid.Column="1" Grid.Row="0" Orientation="Horizontal" Spacing="8">
+                        <Button Content="{Binding PhoneDisplay}"
+                                Command="{Binding CallCommand}"
+                                IsVisible="{Binding HasPhone}"
+                                FontSize="12" Padding="8,4"/>
+                        <Button Content="{Binding EmailDisplay}"
+                                Command="{Binding MailCommand}"
+                                IsVisible="{Binding HasEmail}"
+                                FontSize="12" Padding="8,4"/>
+                      </StackPanel>
+
+                      <TextBlock Grid.Column="1" Grid.Row="1" Text="{Binding Address}"
+                                 IsVisible="{Binding HasAddress}" FontSize="12" Opacity="0.65"
+                                 TextWrapping="Wrap" Margin="4,4,12,0"/>
+
+                      <Border Grid.Column="2" Grid.RowSpan="2" CornerRadius="4" Padding="7,3"
+                              VerticalAlignment="Top"
+                              Background="{DynamicResource SystemControlBackgroundAltHighBrush}">
+                        <StackPanel>
+                          <TextBlock Text="{Binding StatusText}" FontSize="11"
+                                     IsVisible="{Binding IsInvalid}" Foreground="IndianRed"/>
+                          <TextBlock Text="Aktuell" FontSize="11" Opacity="0.5"
+                                     IsVisible="{Binding IsValid}"/>
+                        </StackPanel>
+                      </Border>
+                    </Grid>
+                  </Border>
+                </DataTemplate>
+            </ListBox.ItemTemplate>
+          </ListBox>
+
+            <TextBlock Text="Keine Kontakte erfasst." Opacity="0.4"
+                       HorizontalAlignment="Center" VerticalAlignment="Center"
+                       IsVisible="{Binding HasNoContacts}"/>
+        </Grid>
+      </ContentPage>
+
      <ContentPage Header="Noten">
        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
          <TextBlock Text="Notenübersicht" FontSize="16" Opacity="0.4" HorizontalAlignment="Center"/>
@@ -1,3 +1,48 @@
 using Avalonia.Controls;
+using Avalonia.Input;
+using LehrerApp.Core.Models;
+using LehrerApp.Desktop.ViewModels.Students;
+
 namespace LehrerApp.Desktop.Views.Students;
-public partial class StudentDetailView : UserControl { public StudentDetailView() => InitializeComponent(); }
+
+public partial class StudentDetailView : UserControl
+{
+    public StudentDetailView() => InitializeComponent();
+
+    protected override void OnDataContextChanged(EventArgs e)
+    {
+        base.OnDataContextChanged(e);
+        if (DataContext is not StudentDetailViewModel vm) return;
+        vm.OnEditContact = ShowContactDialog;
+        vm.OnViewAddress = ShowAddressViewer;
+    }
+
+    private async Task<Contact?> ShowContactDialog(Contact? contact)
+    {
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is null) return null;
+
+        var vm = new ContactEditDialogViewModel(contact);
+        var dialog = new ContactEditDialog { DataContext = vm };
+        var saved = await dialog.ShowDialog<bool>(owner);
+        return saved ? vm.Result : null;
+    }
+
+    private void ShowAddressViewer(ContactItem contact)
+    {
+        if (!contact.HasAddress) return;
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        var viewer = new AddressViewerWindow { DataContext = contact };
+        if (owner is not null)
+            viewer.Show(owner);
+        else
+            viewer.Show();
+    }
+
+    private void OnContactDoubleTapped(object? sender, TappedEventArgs e)
+    {
+        if (DataContext is StudentDetailViewModel vm &&
+            vm.ViewSelectedAddressCommand.CanExecute(null))
+            vm.ViewSelectedAddressCommand.Execute(null);
+    }
+}
@@ -1,16 +1,8 @@
 using Avalonia.Controls;
-using LehrerApp.Desktop.ViewModels;
-using Microsoft.Extensions.DependencyInjection;
+
 namespace LehrerApp.Desktop.Views;
+
 public partial class SyncStatusBar : UserControl
 {
-    public SyncStatusBar()
-    {
-        InitializeComponent();
-        Loaded += (_, _) =>
-        {
-            if (DataContext is null)
-                DataContext = App.Services.GetRequiredService<SyncStatusViewModel>();
-        };
-    }
+    public SyncStatusBar() => InitializeComponent();
 }