feat(ui): maximize work console via green traffic-light dot

src/ClaudeDo.Localization/locales/de.json

@@ -186,6 +186,9 @@
     "chipDone": "FERTIG",
     "chipFailed": "FEHLGESCHLAGEN"
   },
+  "console": {
+    "maximizeTip": "Terminal maximieren / wiederherstellen"
+  },
   "modals": {
     "about": {
       "title": "ÜBER",

src/ClaudeDo.Localization/locales/en.json

@@ -186,6 +186,9 @@
     "chipDone": "DONE",
     "chipFailed": "FAILED"
   },
+  "console": {
+    "maximizeTip": "Maximize / restore the terminal"
+  },
   "modals": {
     "about": {
       "title": "ABOUT",

src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs

@@ -62,6 +62,14 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
     partial void OnIsNotesModeChanged(bool value) => OnPropertyChanged(nameof(IsTaskDetailVisible));
     partial void OnIsPrepModeChanged(bool value) => OnPropertyChanged(nameof(IsTaskDetailVisible));
 
+    // Console maximize: green dot shrinks the description row to its MinHeight so
+    // the WorkConsole fills the rest. The row stays draggable and never overlaps.
+    // Applied in DetailsIslandView code-behind (RowDefinitions can't bind).
+    [ObservableProperty] private bool _isConsoleMaximized;
+
+    [RelayCommand]
+    private void ToggleConsoleMaximized() => IsConsoleMaximized = !IsConsoleMaximized;
+
     public NotesEditorViewModel Notes { get; private set; } = null!;
 
     // Current task row (set by IslandsShellViewModel via Bind)

src/ClaudeDo.Ui/Views/Islands/Detail/WorkConsole.axaml

@@ -24,6 +24,18 @@
       <Setter Property="TextElement.Foreground" Value="{StaticResource AccentBrush}" />
     </Style>
 
+    <!-- Traffic-light dot button: no chrome, just the ellipse -->
+    <Style Selector="Button.dot-btn">
+      <Setter Property="Background"      Value="Transparent" />
+      <Setter Property="BorderThickness" Value="0" />
+      <Setter Property="Padding"         Value="0" />
+      <Setter Property="CornerRadius"    Value="0" />
+      <Setter Property="Cursor"          Value="Hand" />
+    </Style>
+    <Style Selector="Button.dot-btn /template/ ContentPresenter">
+      <Setter Property="Background" Value="Transparent" />
+    </Style>
+
     <!-- Terminal prompt action: bracketed text, no button chrome -->
     <Style Selector="Button.prompt-action">
       <Setter Property="Background"      Value="Transparent" />
@@ -60,12 +72,22 @@
       <Grid DockPanel.Dock="Top" ColumnDefinitions="Auto,*,Auto"
             Background="{DynamicResource Surface2Brush}" Height="28">
 
-        <!-- Traffic-light dots -->
+        <!-- Traffic-light dots; green toggles console maximize -->
         <StackPanel Grid.Column="0" Orientation="Horizontal" Spacing="6"
                     Margin="12,0" VerticalAlignment="Center">
           <Ellipse Classes="dot-red" />
           <Ellipse Classes="dot-yellow" />
+          <Button Classes="dot-btn"
+                  Command="{Binding ToggleConsoleMaximizedCommand}"
+                  ToolTip.Tip="{loc:Tr console.maximizeTip}">
+            <Panel>
               <Ellipse Classes="dot-green" />
+              <PathIcon Data="{StaticResource Icon.ArrowOut}"
+                        Width="6" Height="6"
+                        Foreground="{DynamicResource MossBrightBrush}"
+                        HorizontalAlignment="Center" VerticalAlignment="Center" />
+            </Panel>
+          </Button>
         </StackPanel>
 
         <!-- Right cluster: info header (model · turns · diff) + status chip -->

src/ClaudeDo.Ui/Views/Islands/DetailsIslandView.axaml

@@ -39,15 +39,22 @@
     <Grid>
 
       <!-- Task detail: description/steps card (upper) + pinned work console (lower) -->
-      <Grid IsVisible="{Binding IsTaskDetailVisible}"
-            Margin="14,12,14,12"
-            RowDefinitions="2*,*">
+      <Grid x:Name="DetailBodyGrid"
+            IsVisible="{Binding IsTaskDetailVisible}"
+            Margin="14,12,14,12">
+        <Grid.RowDefinitions>
+          <!-- MinHeight keeps the description visible: the console can never
+               overlap it, whether maximized (code-behind) or dragged. -->
+          <RowDefinition Height="2*" MinHeight="90"/>
+          <RowDefinition Height="*"/>
+        </Grid.RowDefinitions>
         <ScrollViewer Grid.Row="0" VerticalScrollBarVisibility="Auto">
           <detail:DescriptionStepsCard VerticalAlignment="Top"/>
         </ScrollViewer>
         <detail:WorkConsole Grid.Row="1" Margin="0,10,0,0"/>
         <!-- Resize by dragging the console's top edge — a transparent splitter
-             over the gap above the console; no standalone separator bar. -->
+             over the gap above the console; no standalone separator bar.
+             Stays draggable while maximized. -->
         <GridSplitter Grid.Row="1"
                       VerticalAlignment="Top"
                       Height="10"

src/ClaudeDo.Ui/Views/Islands/DetailsIslandView.axaml.cs

@@ -1,3 +1,4 @@
+using System.ComponentModel;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Layout;
@@ -10,6 +11,8 @@ namespace ClaudeDo.Ui.Views.Islands;
 
 public partial class DetailsIslandView : UserControl
 {
+    private DetailsIslandViewModel? _subscribedVm;
+
     public DetailsIslandView()
     {
         InitializeComponent();
@@ -18,6 +21,15 @@ public partial class DetailsIslandView : UserControl
 
     private void OnDataContextChanged(object? sender, EventArgs e)
     {
+        if (_subscribedVm is not null)
+            _subscribedVm.PropertyChanged -= OnVmPropertyChanged;
+        _subscribedVm = DataContext as DetailsIslandViewModel;
+        if (_subscribedVm is not null)
+        {
+            _subscribedVm.PropertyChanged += OnVmPropertyChanged;
+            ApplyConsoleMaximized(_subscribedVm.IsConsoleMaximized);
+        }
+
         if (DataContext is DetailsIslandViewModel vm)
         {
             vm.ShowDiffModal = async (diffVm) =>
@@ -49,6 +61,24 @@ public partial class DetailsIslandView : UserControl
         }
     }
 
+    private void OnVmPropertyChanged(object? sender, PropertyChangedEventArgs e)
+    {
+        if (e.PropertyName == nameof(DetailsIslandViewModel.IsConsoleMaximized)
+            && sender is DetailsIslandViewModel vm)
+            ApplyConsoleMaximized(vm.IsConsoleMaximized);
+    }
+
+    // Maximized: shrink the description row to its MinHeight (the console fills
+    // the rest). Restored: back to the 2:1 default. The GridSplitter keeps both
+    // states draggable; MinHeight stops the console from ever covering it.
+    private void ApplyConsoleMaximized(bool maximized)
+    {
+        var descRow = DetailBodyGrid.RowDefinitions[0];
+        descRow.Height = maximized
+            ? new GridLength(descRow.MinHeight, GridUnitType.Pixel)
+            : new GridLength(2, GridUnitType.Star);
+    }
+
     private async System.Threading.Tasks.Task ShowErrorDialogAsync(string message)
     {
         var owner = TopLevel.GetTopLevel(this) as Window;