feat(daily-prep): add Prep-log and Clear-day buttons to MyDay header

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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

@@ -27,6 +27,7 @@ public sealed partial class TasksIslandViewModel : ViewModelBase
     public event EventHandler? FocusAddTaskRequested;
     public event EventHandler? TasksChanged;
     public event Action? NotesRequested;
+    public event Action? PrepRequested;
     public void RequestFocusAddTask() => FocusAddTaskRequested?.Invoke(this, EventArgs.Empty);
 
     [RelayCommand]
@@ -40,10 +41,22 @@ public sealed partial class TasksIslandViewModel : ViewModelBase
     private async Task PrepareDayAsync()
     {
         if (_worker is null) return;
+        PrepRequested?.Invoke();
         try { await _worker.RunDailyPrepNowAsync(); }
         catch { /* worker offline; broadcast will reconcile on return */ }
     }
 
+    [RelayCommand]
+    private void ShowPrepLog() => PrepRequested?.Invoke();
+
+    [RelayCommand]
+    private async Task ClearDayAsync()
+    {
+        if (_worker is null) return;
+        try { await _worker.ClearMyDayAsync(); }
+        catch { /* worker offline; broadcast will reconcile on return */ }
+    }
+
     public ObservableCollection<TaskRowViewModel> Items { get; } = new();
     public ObservableCollection<TaskRowViewModel> OverdueItems { get; } = new();
     public ObservableCollection<TaskRowViewModel> OpenItems { get; } = new();

src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs

@@ -199,6 +199,7 @@ public sealed partial class IslandsShellViewModel : ViewModelBase
         Lists.SelectionChanged += (_, _) => Tasks.LoadForList(Lists.SelectedList);
         Tasks.SelectionChanged += (_, _) => Details.Bind(Tasks.SelectedTask);
         Tasks.NotesRequested += () => Details.ShowNotes();
+        Tasks.PrepRequested += () => Details.ShowPrep();
         Tasks.TasksChanged     += (_, _) => _ = Lists.RefreshCountsAsync();
         Tasks.OpenListSettingsRequested += (_, _) =>
         {