feat(ui): Log Visualizer overlay reachable from a clickable footer log line

src/ClaudeDo.Ui/Views/MainWindow.axaml

@@ -215,15 +215,28 @@
           </StackPanel>
         </Button>
 
-        <!-- Right: worker log line -->
-        <TextBlock DockPanel.Dock="Right"
-                   Classes="meta"
-                   Text="{Binding WorkerLogText}"
-                   IsVisible="{Binding IsWorkerLogVisible}"
-                   Foreground="{Binding WorkerLogLevel, Converter={StaticResource WorkerLogLevelToBrush}}"
-                   LetterSpacing="1.4"
-                   TextTrimming="CharacterEllipsis"
-                   VerticalAlignment="Center"/>
+        <!-- Right: worker log line — click to open the Log Visualizer overlay -->
+        <Button DockPanel.Dock="Right"
+                Command="{Binding OpenLogVisualizerCommand}"
+                Background="Transparent" BorderThickness="0" Padding="6,0"
+                Cursor="Hand" VerticalAlignment="Center"
+                ToolTip.Tip="{loc:Tr modals.logVisualizer.openTooltip}">
+          <Panel>
+            <TextBlock Classes="meta"
+                       Text="{loc:Tr modals.logVisualizer.footerHint}"
+                       IsVisible="{Binding !IsWorkerLogVisible}"
+                       Foreground="{DynamicResource TextMuteBrush}"
+                       LetterSpacing="1.4"
+                       VerticalAlignment="Center"/>
+            <TextBlock Classes="meta"
+                       Text="{Binding WorkerLogText}"
+                       IsVisible="{Binding IsWorkerLogVisible}"
+                       Foreground="{Binding WorkerLogLevel, Converter={StaticResource WorkerLogLevelToBrush}}"
+                       LetterSpacing="1.4"
+                       TextTrimming="CharacterEllipsis"
+                       VerticalAlignment="Center"/>
+          </Panel>
+        </Button>
 
         <!-- Right: prime status notification -->
         <TextBlock DockPanel.Dock="Right"

src/ClaudeDo.Ui/Views/Modals/LogVisualizerView.axaml

@@ -0,0 +1,59 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="using:ClaudeDo.Ui.ViewModels.Modals"
+        xmlns:ctl="using:ClaudeDo.Ui.Views.Controls"
+        xmlns:converters="using:ClaudeDo.Ui.Converters"
+        xmlns:loc="using:ClaudeDo.Ui.Localization"
+        x:Class="ClaudeDo.Ui.Views.Modals.LogVisualizerView"
+        x:DataType="vm:LogVisualizerViewModel"
+        Title="{loc:Tr modals.logVisualizer.title}"
+        Width="760" Height="520"
+        WindowDecorations="None"
+        ExtendClientAreaToDecorationsHint="True"
+        WindowStartupLocation="CenterOwner"
+        Background="{DynamicResource SurfaceBrush}">
+  <Window.Resources>
+    <converters:WorkerLogLevelToBrushConverter x:Key="WorkerLogLevelToBrush"/>
+  </Window.Resources>
+  <Window.KeyBindings>
+    <KeyBinding Gesture="Escape" Command="{Binding CloseCommand}"/>
+  </Window.KeyBindings>
+
+  <ctl:ModalShell Title="{loc:Tr modals.logVisualizer.title}" CloseCommand="{Binding CloseCommand}">
+    <DockPanel LastChildFill="True">
+      <!-- Toolbar: filter · status · refresh -->
+      <Grid DockPanel.Dock="Top" ColumnDefinitions="Auto,*,Auto" Margin="14,10">
+        <CheckBox Grid.Column="0"
+                  Content="{loc:Tr modals.logVisualizer.warnErrorOnly}"
+                  IsChecked="{Binding WarnErrorOnly}"
+                  VerticalAlignment="Center"/>
+        <TextBlock Grid.Column="1" Classes="meta"
+                   Text="{Binding StatusText}"
+                   HorizontalAlignment="Center" VerticalAlignment="Center"
+                   Foreground="{DynamicResource TextMuteBrush}"/>
+        <Button Grid.Column="2" Classes="btn"
+                Content="{loc:Tr modals.logVisualizer.refresh}"
+                Command="{Binding RefreshCommand}"/>
+      </Grid>
+
+      <!-- Last 30 min, oldest-first -->
+      <Border Classes="terminal" Margin="14,0,14,14">
+        <ScrollViewer VerticalScrollBarVisibility="Visible" AllowAutoHide="False" Padding="10,8">
+          <ItemsControl ItemsSource="{Binding Rows}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate DataType="vm:LogVisualizerRow">
+                <Grid ColumnDefinitions="64,*" Margin="0,1">
+                  <TextBlock Grid.Column="0" Classes="log-ts" Text="{Binding Time}"/>
+                  <SelectableTextBlock Grid.Column="1"
+                                       Text="{Binding Message}"
+                                       Foreground="{Binding Level, Converter={StaticResource WorkerLogLevelToBrush}}"
+                                       TextWrapping="Wrap"/>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+        </ScrollViewer>
+      </Border>
+    </DockPanel>
+  </ctl:ModalShell>
+</Window>

src/ClaudeDo.Ui/Views/Modals/LogVisualizerView.axaml.cs

@@ -0,0 +1,10 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace ClaudeDo.Ui.Views.Modals;
+
+public partial class LogVisualizerView : Window
+{
+    public LogVisualizerView() => InitializeComponent();
+    private void InitializeComponent() => AvaloniaXamlLoader.Load(this);
+}

src/ClaudeDo.Ui/Views/WindowDialogService.cs

@@ -104,6 +104,13 @@ public sealed class WindowDialogService : IDialogService
         await dlg.ShowDialog(_owner);
     }
 
+    public async Task ShowLogVisualizerAsync(LogVisualizerViewModel vm)
+    {
+        var dlg = new LogVisualizerView { DataContext = vm };
+        vm.CloseAction = () => dlg.Close();
+        await dlg.ShowDialog(_owner);
+    }
+
     public Task<bool> ConfirmAsync(string message)
     {
         var tcs = new TaskCompletionSource<bool>();