fix(ui): session terminal scrolls to end after layout so last line is fully visible

src/ClaudeDo.Ui/Views/Islands/SessionTerminalView.axaml

@@ -51,7 +51,7 @@
 
       <!-- ── Log output ── -->
       <ScrollViewer Name="LogScroll" VerticalScrollBarVisibility="Auto"
-                    Padding="10,8,10,4">
+                    Padding="10,8,10,12">
         <ItemsControl ItemsSource="{Binding Log}">
           <ItemsControl.ItemTemplate>
             <DataTemplate DataType="vm:LogLineViewModel">

src/ClaudeDo.Ui/Views/Islands/SessionTerminalView.axaml.cs

@@ -1,5 +1,6 @@
 using System.Collections.Specialized;
 using Avalonia.Controls;
+using Avalonia.Threading;
 using ClaudeDo.Ui.ViewModels.Islands;
 
 namespace ClaudeDo.Ui.Views.Islands;
@@ -17,7 +18,7 @@ public partial class SessionTerminalView : UserControl
 
     private void OnLogChanged(object? sender, NotifyCollectionChangedEventArgs e)
     {
-        if (e.Action == NotifyCollectionChangedAction.Add)
-            LogScroll.ScrollToEnd();
+        if (e.Action != NotifyCollectionChangedAction.Add) return;
+        Dispatcher.UIThread.Post(() => LogScroll.ScrollToEnd(), DispatcherPriority.Background);
     }
 }