feat(daily-prep): add Prepare-day button to MyDay header

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

@@ -36,6 +36,14 @@ public sealed partial class TasksIslandViewModel : ViewModelBase
         NotesRequested?.Invoke();
     }
 
+    [RelayCommand]
+    private async Task PrepareDayAsync()
+    {
+        if (_worker is null) return;
+        try { await _worker.RunDailyPrepNowAsync(); }
+        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();
@@ -55,6 +63,7 @@ public sealed partial class TasksIslandViewModel : ViewModelBase
     [ObservableProperty] private bool _showOpenLabel;
     [ObservableProperty] private string _completedHeader = "";
     [ObservableProperty] private bool _showNotesRow;
+    [ObservableProperty] private bool _isMyDayList;
 
     public Func<UnfinishedPlanningModalViewModel, Task>? ShowUnfinishedPlanningModal { get; set; }
 
@@ -201,6 +210,7 @@ public sealed partial class TasksIslandViewModel : ViewModelBase
         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";
 
         _ = LoadForListAsync(list, ct);
     }