style(ui): polish list sidebar, kbd chips, and session terminal

- Introduce .list-count style for sidebar badges (brighter on active row).
- Bind list header More button to the correct OpenSettingsCommand.
- Give the per-list gear the standard icon-btn look.
- Center-align kbd chip content and title-bar/icon button content.
- Drop the kind-marker column in SessionTerminal and always show the
  scrollbar so the terminal feels like one.

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

@@ -66,7 +66,7 @@
         </StackPanel>
         <!-- More button -->
         <Button Grid.Column="2" Classes="icon-btn" VerticalAlignment="Center"
-                Command="{Binding OpenListSettingsCommand}"
+                Command="{Binding OpenSettingsCommand}"
                 ToolTip.Tip="Settings">
           <PathIcon Data="{StaticResource Icon.MoreHorizontal}"
                     Width="14" Height="14"
@@ -112,11 +112,8 @@
                              VerticalAlignment="Center" Margin="8,0"
                              Foreground="{DynamicResource TextDimBrush}" FontSize="13"/>
                   <!-- Count -->
-                  <TextBlock Grid.Column="2"
-                             Text="{Binding Count}"
-                             FontFamily="{DynamicResource MonoFamily}" FontSize="10"
-                             Foreground="{DynamicResource TextFaintBrush}"
-                             VerticalAlignment="Center"/>
+                  <TextBlock Grid.Column="2" Classes="list-count"
+                             Text="{Binding Count}"/>
                 </Grid>
               </Border>
             </DataTemplate>
@@ -160,20 +157,13 @@
                              VerticalAlignment="Center" Margin="8,0"
                              Foreground="{DynamicResource TextDimBrush}" FontSize="13"/>
                   <!-- Count -->
-                  <TextBlock Grid.Column="2"
-                             Text="{Binding Count}"
-                             FontFamily="{DynamicResource MonoFamily}" FontSize="10"
-                             Foreground="{DynamicResource TextFaintBrush}"
-                             VerticalAlignment="Center"/>
+                  <TextBlock Grid.Column="2" Classes="list-count"
+                             Text="{Binding Count}"/>
                   <!-- Gear button -->
-                  <Button Grid.Column="3"
+                  <Button Grid.Column="3" Classes="icon-btn"
                           Content="⚙"
+                          FontSize="12"
                           ToolTip.Tip="Settings..."
-                          Background="Transparent"
-                          BorderThickness="0"
-                          Padding="4,0"
-                          FontSize="11"
-                          Foreground="{DynamicResource TextFaintBrush}"
                           VerticalAlignment="Center"
                           Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenListSettingsCommand}"
                           CommandParameter="{Binding}"/>

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

@@ -50,23 +50,20 @@
       </Grid>
 
       <!-- ── Log output ── -->
-      <ScrollViewer Name="LogScroll" VerticalScrollBarVisibility="Auto"
+      <ScrollViewer Name="LogScroll"
+                    VerticalScrollBarVisibility="Visible"
+                    AllowAutoHide="False"
                     Padding="10,8,10,12">
         <ItemsControl ItemsSource="{Binding Log}">
           <ItemsControl.ItemTemplate>
             <DataTemplate DataType="vm:LogLineViewModel">
-              <Grid ColumnDefinitions="60,46,*" Margin="0,1">
+              <Grid ColumnDefinitions="60,*" Margin="0,1">
                 <!-- Timestamp -->
                 <TextBlock Grid.Column="0"
                            Classes="log-ts"
                            Text="{Binding TimestampFormatted}"/>
-                <!-- Kind marker -->
-                <TextBlock Grid.Column="1"
-                           Classes="log-kind"
-                           Tag="{Binding ClassName}"
-                           Text="{Binding KindMarker}"/>
                 <!-- Message text — selectable so the user can copy raw output -->
-                <SelectableTextBlock Grid.Column="2"
+                <SelectableTextBlock Grid.Column="1"
                                      Text="{Binding Text}" Tag="{Binding ClassName}"
                                      FontFamily="{DynamicResource MonoFont}" FontSize="11"
                                      Foreground="{DynamicResource TextDimBrush}"