feat(ui): reveal a task by id from anywhere

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

@@ -70,6 +70,8 @@ public sealed partial class TasksIslandViewModel : ViewModelBase, IDisposable
     [ObservableProperty] private bool _showNotesRow;
     [ObservableProperty] private bool _isMyDayList;
 
+    internal Task? LoadTask { get; private set; }
+
     public Func<UnfinishedPlanningModalViewModel, Task>? ShowUnfinishedPlanningModal { get; set; }
 
     private readonly EventHandler _langChangedHandler;
@@ -220,14 +222,14 @@ public sealed partial class TasksIslandViewModel : ViewModelBase, IDisposable
         HasCompleted  = false;
         ShowOpenLabel = false;
         ShowNotesRow  = false;
-        if (list is null) return;
+        if (list is null) { 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";
 
-        _ = LoadForListAsync(list, ct);
+        LoadTask = LoadForListAsync(list, ct);
     }
 
     private async Task LoadForListAsync(ListNavItemViewModel list, CancellationToken ct)
@@ -778,6 +780,18 @@ public sealed partial class TasksIslandViewModel : ViewModelBase, IDisposable
     [RelayCommand]
     private void Select(TaskRowViewModel row) => SelectedTask = row;
 
+    public async System.Threading.Tasks.Task<bool> SelectByIdAsync(string taskId)
+    {
+        if (LoadTask is { } lt)
+        {
+            try { await lt; } catch { /* load cancelled/failed — fall through */ }
+        }
+        var row = Items.FirstOrDefault(r => r.Id == taskId);
+        if (row is null) return false;
+        SelectedTask = row;
+        return true;
+    }
+
     [RelayCommand]
     private void ToggleShowCompleted() => IsShowingCompleted = !IsShowingCompleted;