fix(ui): hide Submit for review on list-handler panes in Mission Control

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tests/ClaudeDo.Ui.Tests/ViewModels/MissionControlViewModelTests.cs

@@ -1143,6 +1143,19 @@ public class MissionControlViewModelTests : IDisposable
         }
     }
 
+    // The handler submits its own task, so only a non-handler task-based pane shows the button.
+    [Fact]
+    public async Task ShowSubmitForReview_FalseForListHandler_TrueForNormalTaskPane()
+    {
+        var worker = new RecordingAbandonWorker();
+        using var vm = BuildVm(worker);
+        await vm.OpenConPtySessionAsync("t1");
+        await vm.OpenMergeHelperConPtySessionAsync("L1", new[] { "t2" });
+
+        Assert.True(vm.ConPtySessions[0].ShowSubmitForReview);
+        Assert.False(vm.ConPtySessions[1].ShowSubmitForReview);
+    }
+
     // A plain OpenConPtySessionAsync pane (not a list handler) never shows/allows the action --
     // acceptance criterion 5 ("only at handler panes").
     [Fact]