feat: Add sort by location and refine export options UI

- Add 'Sort by Location' option to export settings
- Redesign Export Options dialog layout for better organization
- Group output settings into a dedicated section
- Improve alignment of separator input and options

Author: claude

Dialogs/Models/ExportOptionsModel.cs

@@ -19,6 +19,7 @@ public partial class ExportOptionsModel : ObservableObject, IDialogContext
     [ObservableProperty] private bool _includeResponseTime = false;
     [ObservableProperty] private bool _includeOriginalLine = false;
     [ObservableProperty] private string _separator = ",";
+    [ObservableProperty] private bool _sortByLocation = false;
     [ObservableProperty] private bool _onlySuccess = true;
 
     public void Close()

Dialogs/Views/ExportOptionsDialog.axaml

@@ -23,7 +23,7 @@
             </Grid>
 
             <!-- Options Groups -->
-            <Grid RowDefinitions="Auto,Auto" ColumnDefinitions="*,8,*" Margin="0,8">
+            <Grid RowDefinitions="Auto,Auto,Auto" ColumnDefinitions="*,8,*" Margin="0,8">
                 <!-- Proxy Info Group -->
                 <Border Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3" 
                         Background="{DynamicResource SemiColorFill0}" 
@@ -54,19 +54,24 @@
                         </UniformGrid>
                     </StackPanel>
                 </Border>
-            </Grid>
-            
-            <u:Divider Margin="0,4"/>
 
-            <Grid ColumnDefinitions="Auto,*,Auto" Margin="0,4">
-                 <CheckBox Grid.Column="0" Content="仅导出成功的代理" IsChecked="{Binding OnlySuccess}" 
-                           FontWeight="Bold"
-                           VerticalAlignment="Center"/>
-                
-                <StackPanel Grid.Column="2" Orientation="Horizontal" Spacing="8">
-                    <TextBlock Text="分隔符" VerticalAlignment="Center"/>
-                    <TextBox Text="{Binding Separator}" Width="60" TextAlignment="Center"/>
-                </StackPanel>
+                <!-- Output Settings Group -->
+                <Border Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="3" 
+                       Background="{DynamicResource SemiColorFill0}" 
+                       CornerRadius="6" Padding="12" Margin="0,8,0,0">
+                   <StackPanel Spacing="8">
+                       <TextBlock Text="输出设置" Foreground="{DynamicResource SemiColorText2}" FontWeight="Bold"/>
+                       <Grid ColumnDefinitions="*,16,Auto" RowDefinitions="Auto,Auto">
+                            <CheckBox Grid.Row="0" Grid.Column="0" Content="仅导出成功的代理" IsChecked="{Binding OnlySuccess}" VerticalAlignment="Center"/>
+                            <CheckBox Grid.Row="1" Grid.Column="0" Content="按归属地排序" IsChecked="{Binding SortByLocation}" Margin="0,12,0,0" VerticalAlignment="Center"/>
+                           
+                           <StackPanel Grid.Row="0" Grid.Column="2" Orientation="Horizontal" Spacing="8" VerticalAlignment="Center">
+                               <TextBlock Text="分隔符" VerticalAlignment="Center"/>
+                               <TextBox Text="{Binding Separator}" Width="60" TextAlignment="Center"/>
+                           </StackPanel>
+                       </Grid>
+                   </StackPanel>
+               </Border>
             </Grid>
 
             <StackPanel Orientation="Horizontal" Spacing="12" HorizontalAlignment="Right" Margin="0,8,0,0">

ViewModels/MainViewModel.cs

@@ -568,7 +568,12 @@ private async Task ExportAllAsync()
             return;
 
         // 过滤数据
-        var query = optionsModel.OnlySuccess ? Results.Where(r => r.Success) : Results;
+        var query = optionsModel.OnlySuccess ? Results.Where(r => r.Success) : Results.AsEnumerable();
+
+        if (optionsModel.SortByLocation)
+        {
+            query = query.OrderBy(r => r.Location ?? string.Empty);
+        }
 
         // 生成导出内容
         var lines = query.Select(r =>