feat: add icon for editor layout

BallanceTasEditor/BallanceTasEditor.csproj

@@ -17,8 +17,4 @@
     <PackageReference Include="DotNetZip" Version="1.9.1.8" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Resource Include="Assets\CloseFile.ico" />
-  </ItemGroup>
-
 </Project>

BallanceTasEditor/Converters/NullableIntStringConverter.cs

@@ -1,19 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Globalization;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Data;
-
-namespace BallanceTasEditor.Converters {
-    public class NullableIntStringConverter : IValueConverter {
-        public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
-            throw new NotImplementedException();
-        }
-
-        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {
-            throw new NotImplementedException();
-        }
-    }
-}

BallanceTasEditor/Views/AboutDialog.xaml

@@ -33,6 +33,6 @@ Version: 1.2 stable
 Build Date: October 21, 2025
"/>
 
         <!-- 确认按钮 -->
-        <Button Grid.Row="4" Content="OK" IsDefault="True" Margin="10" Padding="5" MinWidth="80" HorizontalAlignment="Center"/>
+        <Button Grid.Row="4" Content="OK" Margin="10" HorizontalAlignment="Center" Style="{StaticResource OkButtonStyle}" IsDefault="True"/>
     </Grid>
 </Window>

BallanceTasEditor/Views/PreferenceDialog.xaml

@@ -17,7 +17,7 @@
             <StackPanel Orientation="Vertical">
                 <!-- TODO: This icon is wrong. -->
                 <GroupBox Header="Editor Layout" Margin="10" Padding="10"
-                          Style="{StaticResource AccessoryIconGroupBox}" styles:AccessoryIcon.Icon="/Assets/PasteFrame.ico">
+                          Style="{StaticResource AccessoryIconGroupBox}" styles:AccessoryIcon.Icon="/Assets/EditorLayout.ico">
                     <Grid>
                         <Grid.ColumnDefinitions>
                             <ColumnDefinition Width="*"/>