feat(claude-do): Quick-Claude-Button in der Kopfleiste der Tasks-Insel: oeffn

## Ziel

Ein kleines Icon in der Kopfleiste der Tasks-Insel, das fuer die gerade ausgewaehlte Liste **sofort** eine interaktive ConPTY-Claude-Session im Arbeitsverzeichnis dieser Liste oeffnet — ohne Task, ohne Dialog, ohne Ordnerauswahl.

## Ausgangslage (verifiziert 2026-08-05)

Der komplette Unterbau existiert schon; das ist im Kern Verdrahtung:

- `MissionControlViewModel.OpenAdHocConPtySessio

ClaudeDo-Task: 5d8e6246af9444afa500fbb4546873e7

src/ClaudeDo.Localization/locales/de.json

@@ -130,6 +130,7 @@
   "tasks": {
     "showCompletedTip": "Abgeschlossene anzeigen",
     "letClaudeTip": "Claude machen lassen",
+    "quickClaudeTip": "Schnelle Claude-Sitzung",
     "listSettingsTip": "Listeneinstellungen",
     "addPlaceholder": "Aufgabe hinzufügen…",
     "enterKey": "ENTER",

src/ClaudeDo.Localization/locales/en.json

@@ -130,6 +130,7 @@
   "tasks": {
     "showCompletedTip": "Show completed",
     "letClaudeTip": "Let Claude handle it",
+    "quickClaudeTip": "Quick Claude session",
     "listSettingsTip": "List settings",
     "addPlaceholder": "Add a task…",
     "enterKey": "ENTER",

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

@@ -73,12 +73,25 @@ public sealed partial class TasksIslandViewModel : ViewModelBase, IDisposable
     [ObservableProperty] private bool _showNotesRow;
     [ObservableProperty] private bool _isMyDayList;
     [ObservableProperty] private bool _isLetClaudeVisible;
+    [ObservableProperty] private bool _isQuickClaudeVisible;
 
     public event EventHandler? LetClaudeHandleRequested;
 
     [RelayCommand]
     private void LetClaudeHandle() => LetClaudeHandleRequested?.Invoke(this, EventArgs.Empty);
 
+    // Opens a task-less ConPTY session directly in the current list's working dir. The shell owns
+    // Mission Control, so this just raises an event for it to act on (mirrors OpenConPtySessionRequested).
+    public event Action<string>? OpenQuickClaudeSessionRequested;
+
+    [RelayCommand]
+    private void OpenQuickClaudeSession()
+    {
+        var dir = _currentList?.WorkingDir;
+        if (string.IsNullOrWhiteSpace(dir) || !System.IO.Directory.Exists(dir)) return;
+        OpenQuickClaudeSessionRequested?.Invoke(dir);
+    }
+
     internal Task? LoadTask { get; private set; }
 
     public Func<UnfinishedPlanningModalViewModel, Task>? ShowUnfinishedPlanningModal { get; set; }
@@ -221,7 +234,10 @@ public sealed partial class TasksIslandViewModel : ViewModelBase, IDisposable
         if (e.PropertyName == nameof(ListNavItemViewModel.Name))
             HeaderTitle = vm.Name;
         else if (e.PropertyName == nameof(ListNavItemViewModel.WorkingDir))
+        {
             IsLetClaudeVisible = vm.Kind == ListKind.User && !string.IsNullOrWhiteSpace(vm.WorkingDir);
+            IsQuickClaudeVisible = IsLetClaudeVisible;
+        }
     }
 
     public void LoadForList(ListNavItemViewModel? list)
@@ -259,13 +275,14 @@ public sealed partial class TasksIslandViewModel : ViewModelBase, IDisposable
         ShowOpenLabel = false;
         ShowNotesRow  = false;
         if (listChanged) SelectedTask = null;
-        if (list is null) { IsLetClaudeVisible = false; LoadTask = Task.CompletedTask; return; }
+        if (list is null) { IsLetClaudeVisible = false; IsQuickClaudeVisible = false; LoadTask = Task.CompletedTask; return; }
 
         HeaderTitle = list.Name;
         HeaderEyebrow = DateTime.Now.ToString("dddd · MMM dd", CultureInfo.InvariantCulture).ToUpperInvariant();
         ShowNotesRow = list.Id == "smart:my-day";
         IsMyDayList  = list.Id == "smart:my-day";
         IsLetClaudeVisible = list.Kind == ListKind.User && !string.IsNullOrWhiteSpace(list.WorkingDir);
+        IsQuickClaudeVisible = IsLetClaudeVisible;
 
         LoadTask = LoadForListAsync(list, ct, reusable);
     }

src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs

@@ -242,6 +242,11 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
             OpenMissionControl();
             _ = MissionControl.OpenConPtySessionAsync(taskId);
         };
+        Tasks.OpenQuickClaudeSessionRequested += dir =>
+        {
+            OpenMissionControl();
+            _ = MissionControl.OpenAdHocConPtySessionAsync(dir);
+        };
         Tasks.OpenPlanningConPtyRequested += (taskId, resume) =>
         {
             OpenMissionControl();

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

@@ -37,6 +37,10 @@
                   Command="{Binding LetClaudeHandleCommand}" ToolTip.Tip="{loc:Tr tasks.letClaudeTip}">
             <PathIcon Width="15" Height="15" Data="{StaticResource Icon.Broom}"/>
           </Button>
+          <Button Classes="icon-btn" IsVisible="{Binding IsQuickClaudeVisible}"
+                  Command="{Binding OpenQuickClaudeSessionCommand}" ToolTip.Tip="{loc:Tr tasks.quickClaudeTip}">
+            <PathIcon Width="15" Height="15" Data="{StaticResource Icon.Plus}"/>
+          </Button>
           <Button Classes="icon-btn" IsVisible="{Binding IsMyDayList}"
                   Command="{Binding ClearDayCommand}" ToolTip.Tip="{loc:Tr tasks.clearDayTip}">
             <PathIcon Width="15" Height="15" Data="{StaticResource Icon.Broom}"/>