refactor(ui): unify text and close button in DiffModalView

src/ClaudeDo.Ui/Views/Modals/DiffModalView.axaml

@@ -72,22 +72,15 @@
             <DataTemplate x:DataType="vm:DiffFileViewModel">
               <Border Padding="10,8" Background="Transparent">
                 <StackPanel Spacing="4">
-                  <TextBlock Text="{Binding Path}"
-                             FontFamily="{DynamicResource MonoFont}"
-                             FontSize="{StaticResource FontSizeMono}"
-                             Foreground="{DynamicResource TextDimBrush}"
+                  <TextBlock Classes="path-mono" Text="{Binding Path}"
                              TextTrimming="PrefixCharacterEllipsis"/>
                   <StackPanel Orientation="Horizontal" Spacing="6">
                     <Border Classes="chip" Padding="5,2">
                       <TextBlock Foreground="{DynamicResource MossBrightBrush}"
-                                 FontFamily="{DynamicResource MonoFont}"
-                                 FontSize="{StaticResource FontSizeEyebrow}"
                                  Text="{Binding Additions, StringFormat='+{0}'}"/>
                     </Border>
                     <Border Classes="chip" Padding="5,2">
                       <TextBlock Foreground="{DynamicResource BloodBrush}"
-                                 FontFamily="{DynamicResource MonoFont}"
-                                 FontSize="{StaticResource FontSizeEyebrow}"
                                  Text="{Binding Deletions, StringFormat='−{0}'}"/>
                     </Border>
                   </StackPanel>
@@ -100,13 +93,10 @@
 
       <!-- Diff content -->
       <Grid Grid.Column="1" Background="{DynamicResource VoidBrush}">
-        <TextBlock Text="{Binding StatusMessage}"
+        <TextBlock Classes="body" Text="{Binding StatusMessage}"
                    IsVisible="{Binding StatusMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"
                    HorizontalAlignment="Center"
-                   VerticalAlignment="Center"
-                   Foreground="{DynamicResource TextDimBrush}"
-                   FontFamily="{DynamicResource MonoFont}"
-                   FontSize="{StaticResource FontSizeBody}"/>
+                   VerticalAlignment="Center"/>
         <ScrollViewer HorizontalScrollBarVisibility="Auto"
                     VerticalScrollBarVisibility="Auto">
         <ItemsControl ItemsSource="{Binding SelectedFile.Lines}">