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

src/ClaudeDo.Localization/locales/de.json

@@ -234,6 +234,15 @@
     "reviewResetTip": "Alle Änderungen verwerfen und die Aufgabe auf Leerlauf zurücksetzen"
   },
   "modals": {
+    "logVisualizer": {
+      "title": "WORKER-LOGS — LETZTE 30 MIN",
+      "warnErrorOnly": "Nur Warnungen & Fehler",
+      "refresh": "Aktualisieren",
+      "empty": "Keine Logs in den letzten 30 Minuten.",
+      "count": "{0} Einträge",
+      "footerHint": "logs",
+      "openTooltip": "Aktuelle Worker-Logs anzeigen"
+    },
     "about": {
       "title": "ÜBER",
       "version": "Version",

src/ClaudeDo.Localization/locales/en.json

@@ -234,6 +234,15 @@
     "reviewResetTip": "Discard all changes and reset the task to Idle"
   },
   "modals": {
+    "logVisualizer": {
+      "title": "WORKER LOGS — LAST 30 MIN",
+      "warnErrorOnly": "Warnings & errors only",
+      "refresh": "Refresh",
+      "empty": "No logs in the last 30 minutes.",
+      "count": "{0} entries",
+      "footerHint": "logs",
+      "openTooltip": "View recent worker logs"
+    },
     "about": {
       "title": "ABOUT",
       "version": "Version",

src/ClaudeDo.Ui/Services/IDialogService.cs

@@ -21,6 +21,7 @@ public interface IDialogService
     Task ShowWorktreesOverviewAsync(WorktreesOverviewModalViewModel vm);
     Task ShowWorkerConnectionAsync(WorkerConnectionModalViewModel vm);
     Task ShowConflictResolverAsync(ConflictResolverViewModel vm);
+    Task ShowLogVisualizerAsync(LogVisualizerViewModel vm);
 
     /// <summary>Modal yes/no confirmation. Returns true only when confirmed.</summary>
     Task<bool> ConfirmAsync(string message);

src/ClaudeDo.Ui/Services/Interfaces/IWorkerClient.cs

@@ -85,6 +85,7 @@ public interface IWorkerClient : INotifyPropertyChanged
     Task UpdateDailyNoteAsync(string id, string text);
     Task DeleteDailyNoteAsync(string id);
     Task<string> GetLastPrepLogAsync();
+    Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync();
 
     Task<List<PrimeScheduleDto>> GetPrimeSchedulesAsync();
     Task<PrimeScheduleDto?> UpsertPrimeScheduleAsync(PrimeScheduleDto dto);

src/ClaudeDo.Ui/Services/WorkerClient.cs

@@ -388,6 +388,9 @@ public partial class WorkerClient : ObservableObject, IAsyncDisposable, IWorkerC
     public async Task<string> GetLastPrepLogAsync()
         => await TryInvokeAsync<string>("GetLastPrepLog") ?? string.Empty;
 
+    public async Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync()
+        => await TryInvokeAsync<List<WorkerLogEntry>>("GetRecentLogs") ?? new List<WorkerLogEntry>();
+
     public async Task UpdateListAsync(UpdateListDto dto)
     {
         await _hub.InvokeAsync("UpdateList", dto);

src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs

@@ -290,6 +290,15 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
         if (Dialogs is not null) await Dialogs.ShowAboutAsync(vm);
     }
 
+    [RelayCommand]
+    private async Task OpenLogVisualizer()
+    {
+        if (Dialogs is null || Worker is null) return;
+        var vm = new LogVisualizerViewModel(Worker);
+        await vm.RefreshAsync();
+        await Dialogs.ShowLogVisualizerAsync(vm);
+    }
+
     private bool _connectionPromptShown;
 
     internal bool DecideShowConnectionPrompt(bool isOffline)

src/ClaudeDo.Ui/ViewModels/Modals/LogVisualizerViewModel.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Threading.Tasks;
+using ClaudeDo.Data.Models;
+using ClaudeDo.Ui.Localization;
+using ClaudeDo.Ui.Services;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+
+namespace ClaudeDo.Ui.ViewModels.Modals;
+
+/// <summary>
+/// Log Visualizer overlay — shows the worker's last 30 min of log records (all levels),
+/// fetched once on open via <see cref="IWorkerClient.GetRecentLogsAsync"/> with a manual
+/// Refresh and a "warnings &amp; errors only" filter.
+/// </summary>
+public sealed partial class LogVisualizerViewModel : ViewModelBase
+{
+    private readonly IWorkerClient _worker;
+    private IReadOnlyList<WorkerLogEntry> _all = Array.Empty<WorkerLogEntry>();
+
+    public ObservableCollection<LogVisualizerRow> Rows { get; } = new();
+
+    [ObservableProperty] private bool _warnErrorOnly;
+    [ObservableProperty] private string _statusText = "";
+
+    public Action? CloseAction { get; set; }
+
+    public LogVisualizerViewModel(IWorkerClient worker) => _worker = worker;
+
+    [RelayCommand]
+    public async Task RefreshAsync()
+    {
+        _all = await _worker.GetRecentLogsAsync();
+        Apply();
+    }
+
+    partial void OnWarnErrorOnlyChanged(bool value) => Apply();
+
+    private void Apply()
+    {
+        Rows.Clear();
+        IEnumerable<WorkerLogEntry> items = WarnErrorOnly
+            ? _all.Where(e => e.Level is WorkerLogLevel.Warn or WorkerLogLevel.Error)
+            : _all;
+        foreach (var e in items)
+            Rows.Add(new LogVisualizerRow(e.TimestampUtc.ToLocalTime().ToString("HH:mm:ss"), e.Message, e.Level));
+        StatusText = Rows.Count == 0
+            ? Loc.T("modals.logVisualizer.empty")
+            : Loc.T("modals.logVisualizer.count", Rows.Count);
+    }
+
+    [RelayCommand] private void Close() => CloseAction?.Invoke();
+}
+
+public sealed record LogVisualizerRow(string Time, string Message, WorkerLogLevel Level);

src/ClaudeDo.Ui/Views/MainWindow.axaml

@@ -215,15 +215,28 @@
           </StackPanel>
         </Button>
 
-        <!-- Right: worker log line -->
+        <!-- Right: worker log line — click to open the Log Visualizer overlay -->
-        <TextBlock DockPanel.Dock="Right"
+        <Button DockPanel.Dock="Right"
-                   Classes="meta"
+                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>();

tests/ClaudeDo.Ui.Tests/StubWorkerClient.cs

@@ -77,6 +77,7 @@ public abstract class StubWorkerClient : IWorkerClient
     public virtual Task FinalizePlanningSessionAsync(string taskId, bool queueAgentTasks = true, CancellationToken ct = default) => Task.CompletedTask;
     public virtual Task<int> GetPendingDraftCountAsync(string taskId, CancellationToken ct = default) => Task.FromResult(0);
     public virtual Task<MergeTargetsDto?> GetMergeTargetsAsync(string taskId) => Task.FromResult<MergeTargetsDto?>(null);
+    public virtual Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync() => Task.FromResult<IReadOnlyList<WorkerLogEntry>>(Array.Empty<WorkerLogEntry>());
     public virtual Task<IReadOnlyList<SubtaskDiffDto>> GetPlanningAggregateAsync(string planningTaskId)
         => Task.FromResult<IReadOnlyList<SubtaskDiffDto>>(Array.Empty<SubtaskDiffDto>());
     public virtual Task<CombinedDiffResultDto?> BuildPlanningIntegrationBranchAsync(string planningTaskId, string targetBranch)

tests/ClaudeDo.Ui.Tests/ViewModels/LogVisualizerViewModelTests.cs

@@ -0,0 +1,51 @@
+using ClaudeDo.Data.Models;
+using ClaudeDo.Ui.Services;
+using ClaudeDo.Ui.ViewModels.Modals;
+
+namespace ClaudeDo.Ui.Tests.ViewModels;
+
+public class LogVisualizerViewModelTests
+{
+    private sealed class FakeClient : StubWorkerClient
+    {
+        private readonly IReadOnlyList<WorkerLogEntry> _logs;
+        public FakeClient(IReadOnlyList<WorkerLogEntry> logs) => _logs = logs;
+        public override Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync() => Task.FromResult(_logs);
+    }
+
+    private static WorkerLogEntry E(WorkerLogLevel lvl, string msg)
+        => new(msg, lvl, new DateTime(2026, 6, 23, 8, 0, 0, DateTimeKind.Utc));
+
+    [Fact]
+    public async Task Refresh_populates_rows_from_worker()
+    {
+        var vm = new LogVisualizerViewModel(new FakeClient(new[] { E(WorkerLogLevel.Info, "a"), E(WorkerLogLevel.Error, "b") }));
+
+        await vm.RefreshAsync();
+
+        Assert.Equal(new[] { "a", "b" }, vm.Rows.Select(r => r.Message));
+    }
+
+    [Fact]
+    public async Task WarnErrorOnly_filters_out_info()
+    {
+        var vm = new LogVisualizerViewModel(new FakeClient(new[]
+            { E(WorkerLogLevel.Info, "a"), E(WorkerLogLevel.Warn, "w"), E(WorkerLogLevel.Error, "e") }));
+        await vm.RefreshAsync();
+
+        vm.WarnErrorOnly = true;
+
+        Assert.Equal(new[] { "w", "e" }, vm.Rows.Select(r => r.Message));
+    }
+
+    [Fact]
+    public async Task Empty_logs_yield_no_rows_and_a_status()
+    {
+        var vm = new LogVisualizerViewModel(new FakeClient(Array.Empty<WorkerLogEntry>()));
+
+        await vm.RefreshAsync();
+
+        Assert.Empty(vm.Rows);
+        Assert.False(string.IsNullOrEmpty(vm.StatusText));
+    }
+}

tests/ClaudeDo.Worker.Tests/UiVm/TasksIslandViewModelPlanningTests.cs

@@ -71,6 +71,7 @@ sealed class FakeWorkerClient : IWorkerClient
     }
     public Task FinalizePlanningSessionAsync(string taskId, bool queueAgentTasks = true, CancellationToken ct = default) { FinalizePlanningCalls++; return Task.CompletedTask; }
     public Task<int> GetPendingDraftCountAsync(string taskId, CancellationToken ct = default) => Task.FromResult(0);
+    public Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync() => Task.FromResult<IReadOnlyList<WorkerLogEntry>>(System.Array.Empty<WorkerLogEntry>());
 
     public event Action? PrepStartedEvent;
     public event Action<string>? PrepLineEvent;