LehrerApp/LehrerApp.Desktop/Views/Dashboard/DashboardView.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels"
             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>
    <Style Selector="Border.daycell.selected">
      <Setter Property="Background" Value="{DynamicResource SystemControlBackgroundAccentBrush}"/>
      <Setter Property="BorderThickness" Value="2"/>
      <Setter Property="BorderBrush" Value="{DynamicResource SystemAccentColor}"/>
    </Style>
  </UserControl.Styles>

  <ScrollViewer Padding="24">
    <StackPanel Spacing="20">

      <!-- Begrüßung -->
      <Grid RowDefinitions="Auto,Auto">
        <StackPanel>
          <TextBlock Text="{Binding Greeting}" FontSize="14" Opacity="0.6"/>
          <TextBlock Text="{Binding CurrentDate}" FontSize="24" FontWeight="SemiBold"/>
        </StackPanel>
        <WrapPanel Grid.Row="1" Orientation="Horizontal" ItemSpacing="8" LineSpacing="8" Margin="0,10,0,0">
          <Button Content="Klassenbuch abgleichen…" Click="OnCompareWebUntisDocumentationClick"
                  VerticalAlignment="Center"/>
          <Button Content="Bereiche anpassen" Command="{Binding ToggleDashboardSettingsCommand}"
                  VerticalAlignment="Center"/>
        </WrapPanel>
      </Grid>

      <!-- Der Tagesfokus beantwortet zuerst die vier Fragen, die beim Öffnen der App zählen:
           Was unterrichte ich, was ist zu tun, wo muss ich reagieren und was steht an? -->
      <Border Background="{DynamicResource AppCardBackgroundBrush}"
              BorderBrush="{DynamicResource AppCardBorderBrush}" BorderThickness="1"
              CornerRadius="10" Padding="16,14">
        <Grid ColumnDefinitions="*,*,*,*">
          <StackPanel Grid.Column="0" Spacing="3">
            <TextBlock Text="UNTERRICHT HEUTE" FontSize="10" FontWeight="Bold" Opacity="0.5"/>
            <TextBlock Text="{Binding TodayLessonSummary}" FontSize="18" FontWeight="SemiBold"/>
          </StackPanel>
          <StackPanel Grid.Column="1" Spacing="3" Margin="18,0,0,0">
            <TextBlock Text="AUFGABEN" FontSize="10" FontWeight="Bold" Opacity="0.5"/>
            <TextBlock Text="{Binding OpenTaskSummary}" FontSize="18" FontWeight="SemiBold"/>
          </StackPanel>
          <StackPanel Grid.Column="2" Spacing="3" Margin="18,0,0,0">
            <TextBlock Text="HANDLUNGSBEDARF" FontSize="10" FontWeight="Bold" Opacity="0.5"/>
            <TextBlock Text="{Binding AttentionSummary}" FontSize="18" FontWeight="SemiBold"
                       Foreground="{DynamicResource AppStatusWarningBrush}"/>
          </StackPanel>
          <StackPanel Grid.Column="3" Spacing="3" Margin="18,0,0,0">
            <TextBlock Text="NÄCHSTE 30 TAGE" FontSize="10" FontWeight="Bold" Opacity="0.5"/>
            <TextBlock Text="{Binding UpcomingSummary}" FontSize="18" FontWeight="SemiBold"/>
          </StackPanel>
        </Grid>
      </Border>

      <Border Background="{DynamicResource SystemControlBackgroundAltHighBrush}" CornerRadius="8"
              Padding="12" IsVisible="{Binding IsDashboardSettingsOpen}">
        <ItemsControl ItemsSource="{Binding DashboardCards}">
          <ItemsControl.ItemsPanel>
            <ItemsPanelTemplate><WrapPanel Orientation="Horizontal"/></ItemsPanelTemplate>
          </ItemsControl.ItemsPanel>
          <ItemsControl.ItemTemplate>
            <DataTemplate x:DataType="vm:DashboardCardOption">
              <Border BorderBrush="{DynamicResource SystemControlForegroundBaseLowBrush}"
                      BorderThickness="1" CornerRadius="6" Padding="8" Margin="4">
                <StackPanel Orientation="Horizontal" Spacing="6">
                  <CheckBox Content="{Binding Title}" IsChecked="{Binding IsVisible}" VerticalAlignment="Center"/>
                  <Button Content="↑" Padding="6,2"
                          ToolTip.Tip="Bereich nach oben verschieben"
                          AutomationProperties.Name="Dashboard-Bereich nach oben verschieben"
                          Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).MoveCardUpCommand}"
                          CommandParameter="{Binding}"/>
                  <Button Content="↓" Padding="6,2"
                          ToolTip.Tip="Bereich nach unten verschieben"
                          AutomationProperties.Name="Dashboard-Bereich nach unten verschieben"
                          Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).MoveCardDownCommand}"
                          CommandParameter="{Binding}"/>
                </StackPanel>
              </Border>
            </DataTemplate>
          </ItemsControl.ItemTemplate>
        </ItemsControl>
      </Border>

      <!-- Serverseitig gecachte DWD-Daten für den in den Einstellungen hinterlegten Schulstandort. -->
      <Expander Header="{Binding WeatherSummary}" IsExpanded="{Binding HasWeatherWarnings}"
                IsVisible="{Binding IsWeatherPanelVisible}"
                Background="{DynamicResource AppCardBackgroundBrush}"
                BorderBrush="{DynamicResource AppCardBorderBrush}" BorderThickness="1"
                CornerRadius="8" Padding="12,6">
        <StackPanel Spacing="10" Margin="6,8,6,6">
          <Grid ColumnDefinitions="*,Auto">
            <StackPanel>
              <TextBlock Text="WETTER AM SCHULSTANDORT" FontSize="11" FontWeight="Bold" Opacity="0.5"/>
              <TextBlock Text="{Binding WeatherDetails}" FontSize="11" Opacity="0.65" TextWrapping="Wrap"
                         IsVisible="{Binding WeatherDetails, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
            </StackPanel>
            <Button Grid.Column="1" Content="Aktualisieren" FontSize="11" Padding="8,3"
                    Command="{Binding RefreshCommand}" VerticalAlignment="Top"/>
          </Grid>
          <TextBlock Text="{Binding WeatherStatus}" FontSize="11" Opacity="0.65" TextWrapping="Wrap"
                     IsVisible="{Binding WeatherStatus, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
          <ItemsControl ItemsSource="{Binding WeatherWarnings}" IsVisible="{Binding HasWeatherWarnings}">
            <ItemsControl.ItemTemplate>
              <DataTemplate x:DataType="vm:DashboardWeatherWarningItem">
                <Border BorderBrush="{Binding SeverityColor}" BorderThickness="4,0,0,0"
                        Background="#14D32F2F" Padding="10" Margin="0,3" CornerRadius="4">
                  <StackPanel Spacing="3">
                    <Grid ColumnDefinitions="*,Auto">
                      <TextBlock Text="{Binding Headline}" FontSize="13" FontWeight="SemiBold" TextWrapping="Wrap"/>
                      <TextBlock Grid.Column="1" Text="{Binding PeriodDisplay}" FontSize="10" Opacity="0.65"
                                 Margin="10,0,0,0"/>
                    </Grid>
                    <TextBlock Text="{Binding Description}" FontSize="11" TextWrapping="Wrap"/>
                    <TextBlock Text="{Binding Instruction}" FontSize="11" Opacity="0.75" TextWrapping="Wrap"
                               IsVisible="{Binding Instruction, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
                  </StackPanel>
                </Border>
              </DataTemplate>
            </ItemsControl.ItemTemplate>
          </ItemsControl>
          <TextBlock Text="Wetterdaten © Deutscher Wetterdienst" FontSize="10" Opacity="0.5"/>
        </StackPanel>
      </Expander>

      <TextBlock Text="HEUTE UND HANDLUNGSBEDARF" FontSize="11" FontWeight="Bold" Opacity="0.5"
                 Margin="2,2,0,-8"/>

      <Grid ColumnDefinitions="3*,2*" RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto">

        <!-- Heutige Stunden -->
        <Border Grid.Column="{Binding TodayCard.Column}" Grid.Row="{Binding TodayCard.Row}"
                IsVisible="{Binding TodayCard.EffectiveIsVisible}" Margin="0,0,8,8"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="Heute" FontSize="14" FontWeight="SemiBold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding TodaysLessons}">
              <ItemsControl.ItemTemplate>
                <DataTemplate DataType="vm:LessonItem">
                  <Button Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenLessonCommand}"
                          CommandParameter="{Binding}"
                          Background="Transparent" BorderThickness="0" Padding="0" Margin="0,4"
                          HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch">
                    <Grid ColumnDefinitions="4,*,Auto">
                      <Border Grid.Column="0" Width="4" CornerRadius="2"
                              Background="{DynamicResource SystemAccentColor}"
                              Margin="0,0,10,0"/>
                      <StackPanel Grid.Column="1">
                        <TextBlock Text="{Binding GroupName}" FontWeight="SemiBold" FontSize="13"/>
                        <TextBlock Text="{Binding Topic}" FontSize="12" Opacity="0.7"
                                   TextTrimming="CharacterEllipsis"/>
                      </StackPanel>
                      <StackPanel Grid.Column="2" HorizontalAlignment="Right" Margin="8,0,0,0">
                        <TextBlock Text="{Binding TimeDisplay}" FontSize="12" Opacity="0.7"
                                   HorizontalAlignment="Right"
                                   IsVisible="{Binding TimeDisplay, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
                        <TextBlock Text="{Binding Room}" FontSize="11" Opacity="0.6"
                                   HorizontalAlignment="Right" IsVisible="{Binding HasRoom}"/>
                      </StackPanel>
                    </Grid>
                  </Button>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine Stunden heute" Classes="emptyhint"
                       IsVisible="{Binding !TodaysLessons.Count}"/>
          </StackPanel>
        </Border>

        <!-- Offene Aufgaben -->
        <Border Grid.Column="{Binding TasksCard.Column}" Grid.Row="{Binding TasksCard.Row}"
                IsVisible="{Binding TasksCard.EffectiveIsVisible}" Margin="8,0,0,8"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <Grid ColumnDefinitions="*,Auto,Auto" Margin="0,0,0,10">
              <TextBlock Grid.Column="0" Text="Offene Aufgaben" FontSize="14" FontWeight="SemiBold"
                         Opacity="0.5" VerticalAlignment="Center"/>
              <Button Grid.Column="1" Content="🔔＋" FontSize="12" Padding="7,2" Margin="0,0,4,0"
                      ToolTip.Tip="Erinnerung anlegen" Command="{Binding AddReminderCommand}"/>
              <Button Grid.Column="2" Content="＋" FontSize="12" Padding="8,2"
                      ToolTip.Tip="Aufgabe anlegen" Command="{Binding AddTaskCommand}"/>
            </Grid>
            <ItemsControl ItemsSource="{Binding OpenTasks}">
              <ItemsControl.ItemTemplate>
                <DataTemplate DataType="vm:TaskItem">
                  <Grid ColumnDefinitions="4,Auto,*,Auto" Margin="0,3">
                    <Border Grid.Column="0" Background="#D32F2F" CornerRadius="2" Margin="0,0,6,0"
                            IsVisible="{Binding IsHighPriority}" ToolTip.Tip="Hohe Priorität"/>
                    <TextBlock Grid.Column="1" Text="🔔" FontSize="12" Margin="0,0,4,0"
                               IsVisible="{Binding IsReminder}"
                               ToolTip.Tip="Erinnerung — kein Zeitbezug"/>
                    <TextBlock Grid.Column="2" Text="{Binding Title}"
                               FontSize="13" TextTrimming="CharacterEllipsis"/>
                    <TextBlock Grid.Column="3" Text="{Binding DueDate}"
                               FontSize="12" Opacity="0.6" Margin="8,0,0,0"/>
                  </Grid>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine offenen Aufgaben" Classes="emptyhint"
                       IsVisible="{Binding !OpenTasks.Count}"/>
          </StackPanel>
        </Border>

        <!-- Kalender: feste Position direkt unter Heute/Aufgaben, damit die wachsende
             Lerngruppen-Liste darunter ihn nicht nach unten verdrängt. -->
        <Border Grid.Column="{Binding CalendarCard.Column}" Grid.Row="{Binding CalendarCard.Row}"
                IsVisible="{Binding CalendarCard.EffectiveIsVisible}" Margin="0,0,8,8"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16" HorizontalAlignment="Left" MaxWidth="320">
          <StackPanel Spacing="8">
            <StackPanel.Styles>
              <!-- Basiswerte als Style (nicht lokal), damit die spezifischeren Selektoren
                   (z.B. .daycell.ownclass) sie überschreiben können. -->
              <Style Selector="Border.daycell">
                <Setter Property="Background" Value="Transparent"/>
                <Setter Property="BorderThickness" Value="0"/>
                <Setter Property="BorderBrush" Value="Transparent"/>
                <Setter Property="Opacity" Value="1"/>
              </Style>
              <Style Selector="Border.daycell.haslesson">
                <Setter Property="Background" Value="#14808080"/>
              </Style>
              <Style Selector="Border.daycell.ownclass">
                <Setter Property="BorderThickness" Value="2"/>
                <Setter Property="BorderBrush" Value="{DynamicResource SystemControlBackgroundAccentBrush}"/>
              </Style>
              <Style Selector="Border.daycell.outside">
                <Setter Property="Opacity" Value="0.35"/>
              </Style>
              <Style Selector="TextBlock.daynum">
                <Setter Property="FontWeight" Value="Normal"/>
              </Style>
              <Style Selector="TextBlock.daynum.today">
                <Setter Property="FontWeight" Value="Bold"/>
                <Setter Property="Foreground" Value="{DynamicResource SystemControlForegroundAccentBrush}"/>
              </Style>
            </StackPanel.Styles>

            <Grid ColumnDefinitions="Auto,*,Auto,Auto,Auto">
              <TextBlock Grid.Column="0" Text="KALENDER" FontSize="11" FontWeight="Bold"
                         Opacity="0.5" VerticalAlignment="Center"/>
              <TextBlock Grid.Column="1" Text="{Binding CalendarMonthLabel}" FontSize="13"
                         FontWeight="SemiBold" TextAlignment="Center" VerticalAlignment="Center"
                         Width="130" Margin="12,0"/>
              <Button Grid.Column="2" Content="Heute" FontSize="11" Padding="8,2"
                      Command="{Binding CalendarTodayCommand}" Margin="0,0,4,0"/>
              <Button Grid.Column="3" Content="‹" Padding="8,2" Command="{Binding PrevMonthCommand}"
                      ToolTip.Tip="Vorheriger Monat" AutomationProperties.Name="Vorheriger Monat"/>
              <Button Grid.Column="4" Content="›" Padding="8,2" Command="{Binding NextMonthCommand}" Margin="4,0,0,0"
                      ToolTip.Tip="Nächster Monat" AutomationProperties.Name="Nächster Monat"/>
            </Grid>

            <ItemsControl ItemsSource="{Binding CalendarWeekdayHeaders}">
              <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate><UniformGrid Columns="7"/></ItemsPanelTemplate>
              </ItemsControl.ItemsPanel>
              <ItemsControl.ItemTemplate>
                <DataTemplate>
                  <TextBlock Text="{Binding}" FontSize="10" Opacity="0.5" FontWeight="Bold"
                             HorizontalAlignment="Center" Width="32"/>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>

            <ItemsControl ItemsSource="{Binding CalendarDays}">
              <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate><UniformGrid Columns="7"/></ItemsPanelTemplate>
              </ItemsControl.ItemsPanel>
              <ItemsControl.ItemTemplate>
                <DataTemplate x:DataType="vm:CalendarDayCell">
                  <Button Background="Transparent" BorderThickness="0" Padding="0" Margin="1"
                          HorizontalAlignment="Center"
                          Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).SelectCalendarDayCommand}"
                          CommandParameter="{Binding}" ToolTip.Tip="{Binding Tooltip}">
                    <Border Classes="daycell" Classes.ownclass="{Binding IsOwnClassDay}"
                            Classes.haslesson="{Binding HasLesson}"
                            Classes.outside="{Binding !IsCurrentMonth}"
                            Classes.selected="{Binding IsSelected}"
                            Width="32" Height="32" CornerRadius="6">
                      <Grid>
                        <TextBlock Classes="daynum" Classes.today="{Binding IsToday}"
                                   Text="{Binding DayNumber}" FontSize="12"
                                   HorizontalAlignment="Center" VerticalAlignment="Center"/>
                        <StackPanel Orientation="Horizontal" Spacing="2" Margin="0,0,0,3"
                                    HorizontalAlignment="Center" VerticalAlignment="Bottom">
                          <Ellipse Width="5" Height="5" Fill="#1E88E5" IsVisible="{Binding HasSession}"/>
                          <Ellipse Width="5" Height="5" Fill="#E53935" IsVisible="{Binding HasExam}"/>
                          <Ellipse Width="5" Height="5" Fill="#FF8A00" IsVisible="{Binding HasAnnualPlanEvent}"/>
                        </StackPanel>
                      </Grid>
                    </Border>
                  </Button>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>

            <WrapPanel Orientation="Horizontal" Margin="0,4,0,0">
              <StackPanel Orientation="Horizontal" Spacing="4" Margin="0,0,14,4">
                <Border Width="10" Height="10" CornerRadius="3" Background="#14808080"/>
                <TextBlock Text="Unterricht" FontSize="10" Opacity="0.6"/>
              </StackPanel>
              <StackPanel Orientation="Horizontal" Spacing="4" Margin="0,0,14,4">
                <Ellipse Width="7" Height="7" Fill="#E53935"/>
                <TextBlock Text="Klausur" FontSize="10" Opacity="0.6"/>
              </StackPanel>
              <StackPanel Orientation="Horizontal" Spacing="4" Margin="0,0,14,4">
                <Ellipse Width="7" Height="7" Fill="#1E88E5"/>
                <TextBlock Text="Sitzung" FontSize="10" Opacity="0.6"/>
              </StackPanel>
              <StackPanel Orientation="Horizontal" Spacing="4" Margin="0,0,14,4">
                <Ellipse Width="7" Height="7" Fill="#FF8A00"/>
                <TextBlock Text="Jahresplan" FontSize="10" Opacity="0.6"/>
              </StackPanel>
              <StackPanel Orientation="Horizontal" Spacing="4" Margin="0,0,14,4">
                <Border Width="10" Height="10" CornerRadius="3" BorderThickness="2"
                        BorderBrush="{DynamicResource SystemControlBackgroundAccentBrush}"/>
                <TextBlock Text="Meine Klasse" FontSize="10" Opacity="0.6"/>
              </StackPanel>
            </WrapPanel>

            <Separator Margin="0,4"/>
            <TextBlock Text="{Binding SelectedDayLabel}" FontWeight="SemiBold" FontSize="12"/>
            <ItemsControl ItemsSource="{Binding SelectedDayEvents}">
              <ItemsControl.ItemTemplate>
                <DataTemplate x:DataType="vm:CalendarEventItem">
                  <Button Background="Transparent" BorderThickness="0" Padding="0" Margin="0,3"
                          HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
                          Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenCalendarEventCommand}"
                          CommandParameter="{Binding}">
                    <Grid ColumnDefinitions="Auto,*">
                      <TextBlock Text="{Binding KindLabel}" FontSize="10" Opacity="0.55" Width="58"/>
                      <StackPanel Grid.Column="1">
                        <TextBlock Text="{Binding Title}" FontSize="12" FontWeight="SemiBold"/>
                        <TextBlock Text="{Binding Subtitle}" FontSize="10" Opacity="0.6"/>
                        <TextBlock Text="{Binding Description}" FontSize="10" Opacity="0.6"
                                   TextWrapping="Wrap"
                                   IsVisible="{Binding Description, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
                      </StackPanel>
                    </Grid>
                  </Button>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine Termine an diesem Tag." Classes="emptyhint"
                       IsVisible="{Binding !SelectedDayEvents.Count}"/>
          </StackPanel>
        </Border>

        <!-- Offene Entschuldigungen: neben dem Kalender, ebenfalls feste Position -->
        <Border Grid.Column="{Binding ExcusesCard.Column}" Grid.Row="{Binding ExcusesCard.Row}"
                IsVisible="{Binding ExcusesCard.EffectiveIsVisible}" Margin="8,0,0,8" VerticalAlignment="Top"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="OFFENE ENTSCHULDIGUNGEN" FontSize="11" FontWeight="Bold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding OpenExcuses}">
              <ItemsControl.ItemTemplate>
                <DataTemplate DataType="vm:OpenExcuseItem">
                  <Grid ColumnDefinitions="*,Auto,Auto" Margin="0,4">
                    <StackPanel Grid.Column="0">
                      <TextBlock Text="{Binding StudentName}" FontSize="13" FontWeight="SemiBold"
                                 TextTrimming="CharacterEllipsis"/>
                      <TextBlock FontSize="11" Opacity="0.6">
                        <Run Text="{Binding GroupName}"/>
                        <Run Text=" · "/>
                        <Run Text="{Binding DateDisplay}"/>
                      </TextBlock>
                    </StackPanel>
                    <Button Grid.Column="1" Content="Entschuldigt" FontSize="11" Padding="7,3"
                            Command="{Binding MarkExcusedCommand}" Margin="0,0,4,0"/>
                    <Button Grid.Column="2" Content="Unentschuldigt" FontSize="11" Padding="7,3"
                            Command="{Binding MarkUnexcusedCommand}"/>
                  </Grid>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine offenen Entschuldigungen." Classes="emptyhint"
                       IsVisible="{Binding !OpenExcuses.Count}"/>
          </StackPanel>
        </Border>

        <!-- Fehlzeiten-Warnung (5.2.3) -->
        <Border Grid.Column="{Binding AttendanceCard.Column}" Grid.Row="{Binding AttendanceCard.Row}"
                IsVisible="{Binding AttendanceCard.EffectiveIsVisible}" 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>

        <!-- Klausurwochen (Nutzer-Feedback): eigene Klausurlast über alle Kurse hinweg -->
        <Border Grid.Column="{Binding ExamLoadCard.Column}" Grid.Row="{Binding ExamLoadCard.Row}"
                IsVisible="{Binding ExamLoadCard.EffectiveIsVisible}" Margin="0,0,8,8" VerticalAlignment="Top"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="KLAUSURWOCHEN" FontSize="11" FontWeight="Bold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding ExamWeekLoads}">
              <ItemsControl.ItemTemplate>
                <DataTemplate DataType="vm:ExamWeekLoadItem">
                  <Grid ColumnDefinitions="*,Auto" Margin="0,4">
                    <TextBlock Grid.Column="0" Text="{Binding Label}" FontSize="13"/>
                    <TextBlock Grid.Column="1" Text="{Binding CountDisplay}" Foreground="#F59E0B"
                               FontSize="12" VerticalAlignment="Center"/>
                  </Grid>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine Woche mit auffälliger Klausurhäufung." Classes="emptyhint"
                       IsVisible="{Binding !ExamWeekLoads.Count}"/>
          </StackPanel>
        </Border>

        <!-- Unterrichtszeit nacherfassen (Nutzer-Feedback) -->
        <Border Grid.Column="{Binding MissingTeachingTimeCard.Column}" Grid.Row="{Binding MissingTeachingTimeCard.Row}"
                IsVisible="{Binding MissingTeachingTimeCard.EffectiveIsVisible}" Margin="0,0,8,8" VerticalAlignment="Top"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="UNTERRICHTSZEIT NACHERFASSEN" FontSize="11" FontWeight="Bold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding MissingTeachingTimeEntries}">
              <ItemsControl.ItemTemplate>
                <DataTemplate DataType="vm:MissingTeachingTimeItem">
                  <Grid ColumnDefinitions="*,Auto" Margin="0,4">
                    <TextBlock Grid.Column="0" Text="{Binding DateDisplay}" FontSize="13"
                               VerticalAlignment="Center"/>
                    <Button Grid.Column="1" Content="Erfassen" FontSize="12" Padding="10,4"
                            Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).AddMissingTeachingTimeCommand}"
                            CommandParameter="{Binding}"/>
                  </Grid>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine fehlende Unterrichtszeit-Erfassung." Classes="emptyhint"
                       IsVisible="{Binding !MissingTeachingTimeEntries.Count}"/>
          </StackPanel>
        </Border>

        <!-- Förderplan-Wiedervorlage (5.3.2) -->
        <Border Grid.Column="{Binding SupportCard.Column}" Grid.Row="{Binding SupportCard.Row}"
                IsVisible="{Binding SupportCard.EffectiveIsVisible}" 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>

        <!-- Anstehende Termine (9.3) -->
        <Border Grid.Column="{Binding UpcomingCard.Column}" Grid.Row="{Binding UpcomingCard.Row}"
                IsVisible="{Binding UpcomingCard.EffectiveIsVisible}" Margin="0,0,8,8" VerticalAlignment="Top"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="ANSTEHENDE TERMINE" FontSize="11" FontWeight="Bold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding UpcomingDates}">
              <ItemsControl.ItemTemplate>
                <DataTemplate x:DataType="vm:UpcomingDateItem">
                  <Button Background="Transparent" BorderThickness="0" Padding="0" Margin="0,4"
                          HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
                          Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenUpcomingDateCommand}"
                          CommandParameter="{Binding}">
                    <Grid ColumnDefinitions="Auto,*,Auto">
                      <Border Background="{DynamicResource SystemAccentColorLight2}" CornerRadius="4"
                              Padding="5,2" VerticalAlignment="Center">
                        <TextBlock Text="{Binding KindLabel}" FontSize="10"/>
                      </Border>
                      <StackPanel Grid.Column="1" Margin="8,0">
                        <TextBlock Text="{Binding Title}" FontSize="13" FontWeight="SemiBold"
                                   TextTrimming="CharacterEllipsis"/>
                        <TextBlock Text="{Binding Subtitle}" FontSize="11" Opacity="0.6"/>
                      </StackPanel>
                      <TextBlock Grid.Column="2" Text="{Binding DateDisplay}" FontSize="12"
                                 VerticalAlignment="Center" Classes.overdue="{Binding IsOverdue}"/>
                    </Grid>
                  </Button>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine Termine in den nächsten 30 Tagen." Classes="emptyhint"
                       IsVisible="{Binding !UpcomingDates.Count}"/>
          </StackPanel>
        </Border>

        <!-- Offene Korrekturen (9.4) -->
        <Border Grid.Column="{Binding CorrectionsCard.Column}" Grid.Row="{Binding CorrectionsCard.Row}"
                IsVisible="{Binding CorrectionsCard.EffectiveIsVisible}" Margin="8,0,0,8" VerticalAlignment="Top"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="OFFENE KORREKTUREN" FontSize="11" FontWeight="Bold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding OpenCorrections}">
              <ItemsControl.ItemTemplate>
                <DataTemplate x:DataType="vm:CorrectionProgressItem">
                  <Button Background="Transparent" BorderThickness="0" Padding="0" Margin="0,5"
                          HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
                          Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenCorrectionCommand}"
                          CommandParameter="{Binding}">
                    <StackPanel Spacing="3">
                      <Grid ColumnDefinitions="*,Auto">
                        <TextBlock Text="{Binding Title}" FontSize="13" FontWeight="SemiBold"/>
                        <TextBlock Grid.Column="1" Text="{Binding DateDisplay}" FontSize="11" Opacity="0.6"/>
                      </Grid>
                      <TextBlock Text="{Binding GroupName}" FontSize="11" Opacity="0.6"/>
                      <ProgressBar Minimum="0" Maximum="100" Value="{Binding Percent}" Height="6"/>
                      <TextBlock Text="{Binding ProgressDisplay}" FontSize="10" Opacity="0.65"/>
                    </StackPanel>
                  </Button>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine offenen Korrekturen." Classes="emptyhint"
                       IsVisible="{Binding !OpenCorrections.Count}"/>
          </StackPanel>
        </Border>

        <!-- Ungeplante Stunden -->
        <Border Grid.Column="{Binding UnplannedCard.Column}" Grid.Row="{Binding UnplannedCard.Row}"
                IsVisible="{Binding UnplannedCard.EffectiveIsVisible}" Margin="0,0,8,8" VerticalAlignment="Top"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="UNGEPLANTE STUNDEN" FontSize="11" FontWeight="Bold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding UnplannedLessons}">
              <ItemsControl.ItemTemplate>
                <DataTemplate x:DataType="vm:UnplannedLessonItem">
                  <Button Background="Transparent" BorderThickness="0" Padding="0" Margin="0,5"
                          HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
                          Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenUnplannedLessonCommand}"
                          CommandParameter="{Binding}">
                    <Grid ColumnDefinitions="*,Auto">
                      <TextBlock Text="{Binding Display}" FontSize="13"
                                 TextTrimming="CharacterEllipsis"/>
                      <TextBlock Grid.Column="1" Text="{Binding DateDisplay}" FontSize="12"
                                 VerticalAlignment="Center" Opacity="0.6"/>
                    </Grid>
                  </Button>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine ungeplanten Stunden." Classes="emptyhint"
                       IsVisible="{Binding !UnplannedLessons.Count}"/>
          </StackPanel>
        </Border>

        <!-- Auffälligkeiten (9.5) -->
        <Border Grid.Column="{Binding AlertsCard.Column}" Grid.Row="{Binding AlertsCard.Row}"
                IsVisible="{Binding AlertsCard.EffectiveIsVisible}" Margin="0,0,8,8" VerticalAlignment="Top"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="AUFFÄLLIGKEITEN" FontSize="11" FontWeight="Bold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding Alerts}">
              <ItemsControl.ItemTemplate>
                <DataTemplate x:DataType="vm:DashboardAlertItem">
                  <Button Background="Transparent" BorderThickness="0" Padding="0" Margin="0,4"
                          HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
                          Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenAlertCommand}"
                          CommandParameter="{Binding}">
                    <Grid ColumnDefinitions="4,*">
                      <Border Background="{Binding SeverityColor}" CornerRadius="2" Margin="0,0,9,0"/>
                      <StackPanel Grid.Column="1">
                        <Grid ColumnDefinitions="*,Auto">
                          <TextBlock Text="{Binding StudentName}" FontSize="13" FontWeight="SemiBold"/>
                          <TextBlock Grid.Column="1" Text="{Binding KindLabel}" FontSize="10" Opacity="0.6"/>
                        </Grid>
                        <TextBlock Text="{Binding Detail}" FontSize="11" Opacity="0.65"/>
                      </StackPanel>
                    </Grid>
                  </Button>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Keine Auffälligkeiten erkannt." Classes="emptyhint"
                       IsVisible="{Binding !Alerts.Count}"/>
          </StackPanel>
        </Border>

        <!-- Meine Lerngruppen -->
        <Border Grid.Column="{Binding GroupsCard.Column}" Grid.Row="{Binding GroupsCard.Row}"
                IsVisible="{Binding GroupsCard.EffectiveIsVisible}"
                Background="{DynamicResource SystemControlBackgroundAltHighBrush}"
                CornerRadius="8" Padding="16">
          <StackPanel>
            <TextBlock Text="MEINE LERNGRUPPEN" FontSize="11" FontWeight="Bold"
                       Opacity="0.5" Margin="0,0,0,10"/>
            <ItemsControl ItemsSource="{Binding CurrentGroups}" HorizontalAlignment="Stretch">
              <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                  <WrapPanel Orientation="Horizontal" ItemSpacing="8" LineSpacing="8"/>
                </ItemsPanelTemplate>
              </ItemsControl.ItemsPanel>
              <ItemsControl.ItemTemplate>
                <DataTemplate DataType="vm:GroupChip">
                  <Button Command="{Binding $parent[ItemsControl].((vm:DashboardViewModel)DataContext).OpenGroupCommand}"
                          CommandParameter="{Binding}"
                          Background="{DynamicResource SystemAccentColorLight2}"
                          CornerRadius="6" Padding="12,6" MinWidth="150"
                          ToolTip.Tip="Kurs öffnen">
                    <StackPanel>
                      <StackPanel Orientation="Horizontal" Spacing="6">
                        <Border Width="6" Height="6" CornerRadius="3"
                                Background="{DynamicResource SystemAccentColor}"
                                IsVisible="{Binding IsOnSelectedDay}" VerticalAlignment="Center"/>
                        <TextBlock Text="{Binding Name}" FontWeight="SemiBold" FontSize="13"/>
                      </StackPanel>
                      <TextBlock Text="{Binding Subject}" FontSize="11" Opacity="0.7"
                                 IsVisible="{Binding Subject, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
                    </StackPanel>
                  </Button>
                </DataTemplate>
              </ItemsControl.ItemTemplate>
            </ItemsControl>
            <TextBlock Text="Noch keine Lerngruppen." Classes="emptyhint"
                       IsVisible="{Binding !CurrentGroups.Count}"/>
          </StackPanel>
        </Border>

      </Grid>
    </StackPanel>
  </ScrollViewer>
</UserControl>