feat(ui): unfinished planning session dialog

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

src/ClaudeDo.Ui/Views/Modals/UnfinishedPlanningModalView.axaml.cs

@@ -0,0 +1,23 @@
+using Avalonia.Controls;
+using Avalonia.Input;
+
+namespace ClaudeDo.Ui.Views.Modals;
+
+public partial class UnfinishedPlanningModalView : Window
+{
+    public UnfinishedPlanningModalView()
+    {
+        InitializeComponent();
+        DataContextChanged += (_, _) =>
+        {
+            if (DataContext is ViewModels.Modals.UnfinishedPlanningModalViewModel vm)
+                vm.CloseAction = () => Close();
+        };
+    }
+
+    private void TitleBar_PointerPressed(object? sender, PointerPressedEventArgs e)
+    {
+        if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
+            BeginMoveDrag(e);
+    }
+}