style(ui): keep child row highlight clear of the folder guide line

src/ClaudeDo.Ui/Design/IslandStyles.axaml

@@ -868,7 +868,7 @@
   </Style>
   <!-- Folder tree rows sit tighter than the smart lists — a deep tree gets long fast. -->
   <Style Selector="Border.list-item.tree-row">
-    <Setter Property="Padding" Value="10,4" />
+    <Setter Property="Padding" Value="4,4,10,4" />
   </Style>
   <Style Selector="Border.list-item:pointerover">
     <Setter Property="Background" Value="{StaticResource Surface2Brush}" />

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

@@ -69,7 +69,7 @@
                       Background="{DynamicResource AccentBrush}"
                       CornerRadius="1"
                       HorizontalAlignment="Left" VerticalAlignment="Center"
-                      Margin="-8,0,0,0"/>
+                      Margin="-2,0,0,0"/>
             </Border>
             <!-- Icon (list-settings → Icon tab; "Folder" when unset) -->
             <PathIcon Grid.Column="1" Classes="list-icon"
@@ -144,11 +144,12 @@
             </Grid>
           </Border>
 
-          <!-- Guide line drops from under the chevron's centre (padding 10 + half the 9px glyph). -->
+          <!-- Guide line drops from under the chevron's centre (tree-row padding 4 + half the 9px
+               glyph); children start past it so their highlight never touches the line. -->
           <Panel IsVisible="{Binding !IsCollapsed}">
-            <Border Width="1" HorizontalAlignment="Left" Margin="14,0,0,4"
+            <Border Width="1" HorizontalAlignment="Left" Margin="8,0,0,4"
                     Background="{DynamicResource LineBrush}" IsHitTestVisible="False"/>
-            <ItemsControl ItemsSource="{Binding Children}" Margin="12,0,0,0"/>
+            <ItemsControl ItemsSource="{Binding Children}" Margin="14,0,0,0"/>
           </Panel>
         </StackPanel>