fix(ui): Aktions- und Bestätigungs-Konsistenz (UX-Audit #3)

Sechs Konsistenz-Fixes: Delete-Task ins Zeilen-Kontextmenü (routet über den
Worker wie DetailsIslandViewModel.DeleteTaskAsync, damit ein gelöschtes Child
den WaitingForChildren-Parent korrekt weiterschaltet); EnqueueCommand als
"Send to queue"-Button im Detail-Pane verdrahtet; Settings-Eintrag im
Listen-Kontextmenü ergänzt; Worktree-Discard und Reset-All laufen jetzt über
das jeweils vorhandene Confirm-Hook (ConfirmAction / neuer ConfirmAsync-Hook
auf WorktreesSettingsTabViewModel) statt ohne Rückfrage bzw. über ein
Inline-Reveal-Banner; killSessionTip/closeSession und die deutschen
Queue-Strings im usageMonitor vereinheitlicht.

Kein zweiter Dialog-Mechanismus eingeführt — überall die vorhandenen Hooks
wiederverwendet.

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

@@ -1146,6 +1146,42 @@ public sealed partial class TasksIslandViewModel : ViewModelBase, IDisposable
             "vm.queue.baseDirtyWarning", warning.ModifiedCount, warning.UntrackedCount));
     }
 
+    // Row-level delete for the task context menu. Routed through the worker (mirrors
+    // DetailsIslandViewModel.DeleteTaskAsync) so a deleted child correctly advances a
+    // WaitingForChildren parent instead of bypassing TaskStateService.
+    [RelayCommand]
+    private async Task DeleteTaskAsync(TaskRowViewModel? row)
+    {
+        if (row is null || _worker is null) return;
+        if (ConfirmAsync is not null)
+        {
+            var ok = await ConfirmAsync(Loc.T("vm.tasksIsland.deleteTaskConfirm", row.Title));
+            if (!ok) return;
+        }
+
+        bool deleted;
+        string? error;
+        try
+        {
+            (deleted, error) = await _worker.DeleteTaskAsync(row.Id);
+        }
+        catch (Exception ex)
+        {
+            ErrorReported?.Invoke(Loc.T("vm.tasksIsland.deleteTaskFailed", ex.Message));
+            return;
+        }
+        if (!deleted)
+        {
+            ErrorReported?.Invoke(error ?? Loc.T("vm.tasksIsland.deleteTaskFailed", "unknown error"));
+            return;
+        }
+
+        Items.Remove(row);
+        Regroup();
+        UpdateSubtitle();
+        TasksChanged?.Invoke(this, EventArgs.Empty);
+    }
+
     [RelayCommand]
     private async Task SendToQueueAsync(TaskRowViewModel? row)
     {

src/ClaudeDo.Ui/ViewModels/Modals/Settings/WorktreesSettingsTabViewModel.cs

@@ -15,12 +15,15 @@ public sealed partial class WorktreesSettingsTabViewModel : ViewModelBase
     [ObservableProperty] private bool _worktreeAutoCleanupEnabled;
     [ObservableProperty] private int _worktreeAutoCleanupDays = 7;
 
-    [ObservableProperty] private bool _showResetConfirm;
     [ObservableProperty] private string _statusMessage = "";
     [ObservableProperty] private bool _isBusy;
 
     public OperationStatus ResetStatus { get; } = new();
 
+    /// <summary>Wired by <c>WindowDialogService.ShowSettingsAsync</c>. A missing hook (null)
+    /// must not reset silently — <see cref="ConfirmResetAll"/> aborts instead.</summary>
+    public Func<string, Task<bool>>? ConfirmAsync { get; set; }
+
     public IReadOnlyList<string> WorktreeStrategies { get; } = new[] { "sibling", "central" };
 
     public WorktreesSettingsTabViewModel(IWorkerClient worker) => _worker = worker;
@@ -52,13 +55,13 @@ public sealed partial class WorktreesSettingsTabViewModel : ViewModelBase
         finally { IsBusy = false; }
     }
 
-    [RelayCommand] private void RequestResetConfirm() => ShowResetConfirm = true;
-    [RelayCommand] private void CancelResetConfirm() => ShowResetConfirm = false;
-
     [RelayCommand]
     private async Task ConfirmResetAll()
     {
-        ShowResetConfirm = false; StatusMessage = "";
+        if (ConfirmAsync is null) return;
+        if (!await ConfirmAsync(Loc.T("settings.worktrees.confirmRemoveAll"))) return;
+
+        StatusMessage = "";
         using var op = ResetStatus.Begin(Loc.T("ops.worktrees.resetting"));
         try
         {

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

@@ -290,6 +290,8 @@ public sealed partial class WorktreesOverviewModalViewModel : ViewModelBase
     private async Task Discard(WorktreeOverviewRowViewModel? row)
     {
         if (row is null || row.State != WorktreeState.Active) return;
+        if (ConfirmAction is not null && !await ConfirmAction(Loc.T("vm.worktreesOverview.discardConfirm", row.TaskTitle))) return;
+
         var (ok, err) = await _worker.SetWorktreeStateAsync(row.TaskId, WorktreeState.Discarded);
         if (ok) row.State = WorktreeState.Discarded;
         else StatusMessage = err ?? Loc.T("vm.worktreesOverview.discardFailed");