diff --git a/src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs b/src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs
index 14da506..2ed2ae9 100644
--- a/src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs
+++ b/src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs
@@ -1267,7 +1267,11 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
     private async System.Threading.Tasks.Task ApproveReviewAsync()
     {
         if (Task is null || !_worker.IsConnected) return;
-        await _worker.ApproveReviewAsync(Task.Id);
+        // The hub rejects (HubException) if the task is no longer WaitingForReview
+        // — e.g. after "Merge all" folded the parent. Swallow it; the TaskUpdated
+        // broadcast reconciles the UI. An unhandled command exception would crash.
+        try { await _worker.ApproveReviewAsync(Task.Id); }
+        catch { /* stale review action; broadcast reconciles */ }
     }
 
     [RelayCommand]
@@ -1276,7 +1280,8 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
         if (Task is null || !_worker.IsConnected) return;
         var feedback = ReviewFeedback;
         if (string.IsNullOrWhiteSpace(feedback)) return;
-        await _worker.RejectReviewToQueueAsync(Task.Id, feedback);
+        try { await _worker.RejectReviewToQueueAsync(Task.Id, feedback); }
+        catch { /* stale review action; broadcast reconciles */ return; }
         ReviewFeedback = "";
     }
 
@@ -1284,14 +1289,16 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
     private async System.Threading.Tasks.Task ParkReviewAsync()
     {
         if (Task is null || !_worker.IsConnected) return;
-        await _worker.RejectReviewToIdleAsync(Task.Id);
+        try { await _worker.RejectReviewToIdleAsync(Task.Id); }
+        catch { /* stale review action; broadcast reconciles */ }
     }
 
     [RelayCommand]
     private async System.Threading.Tasks.Task CancelReviewAsync()
     {
         if (Task is null || !_worker.IsConnected) return;
-        await _worker.CancelReviewAsync(Task.Id);
+        try { await _worker.CancelReviewAsync(Task.Id); }
+        catch { /* stale review action; broadcast reconciles */ }
     }
 
     // ── Diff meter parser ───────────────────────────────────────────────────────
diff --git a/tests/ClaudeDo.Ui.Tests/ViewModels/DetailsIslandPlanningTests.cs b/tests/ClaudeDo.Ui.Tests/ViewModels/DetailsIslandPlanningTests.cs
index ab68b3f..6f00e17 100644
--- a/tests/ClaudeDo.Ui.Tests/ViewModels/DetailsIslandPlanningTests.cs
+++ b/tests/ClaudeDo.Ui.Tests/ViewModels/DetailsIslandPlanningTests.cs
@@ -63,12 +63,21 @@ public class DetailsIslandPlanningTests : IDisposable
         public Task DeleteAsync(string id) => Task.CompletedTask;
     }
 
-    private DetailsIslandViewModel BuildVm(FakeWorkerClient worker)
+    private DetailsIslandViewModel BuildVm(StubWorkerClient worker)
     {
         var factory = new TestDbFactory(NewContext);
         return new DetailsIslandViewModel(factory, worker, new NullServiceProvider(), new StubNotesApi());
     }
 
+    // Connected worker whose review calls fail the way the hub does when the task
+    // is no longer WaitingForReview (e.g. after "Merge all" folded the parent).
+    private sealed class ThrowingReviewWorkerClient : StubWorkerClient
+    {
+        public override bool IsConnected => true;
+        public override Task ApproveReviewAsync(string taskId) =>
+            Task.FromException(new InvalidOperationException("Task is not waiting for review; cannot approve."));
+    }
+
     private static SubtaskRowViewModel MakeSubtask(TaskStatus status, WorktreeState wt = WorktreeState.Active) =>
         new() { Id = Guid.NewGuid().ToString(), Title = "t", Status = status, WorktreeState = wt };
 
@@ -135,6 +144,21 @@ public class DetailsIslandPlanningTests : IDisposable
             vm.MergeAllDisabledReason.Contains("discarded", StringComparison.OrdinalIgnoreCase));
     }
 
+    // ── Review-action resilience: a failing hub call must not crash the app ───
+
+    [Fact]
+    public async Task ApproveReview_WhenWorkerThrows_DoesNotPropagate()
+    {
+        var vm = BuildVm(new ThrowingReviewWorkerClient());
+        vm.Bind(new TaskRowViewModel { Id = "p", Status = TaskStatus.WaitingForReview });
+
+        // Before the fix this surfaced the HubException as an unobserved
+        // async-void exception from the command, crashing the process.
+        var ex = await Record.ExceptionAsync(() => vm.ApproveReviewCommand.ExecuteAsync(null));
+
+        Assert.Null(ex);
+    }
+
     // ── Branch-load test exercising the VM via Bind ──────────────────────────
 
     [Fact]