feat: 订单列表添加商品信息和数量列

- 在"地址"列后、"金额"列前新增"商品信息"和"数量"两列
- 商品信息显示格式：商品名x数量; ...
- 数量列显示订单商品总数

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

PackagingMallShipper/Views/OrderListView.xaml

@@ -153,9 +153,13 @@
                 <DataGridTextColumn Header="电话" Binding="{Binding LogisticsMobile}" Width="110"/>
                 
                 <DataGridTextColumn Header="地址" Binding="{Binding FullAddress}" Width="*"/>
-                
-                <DataGridTextColumn Header="金额" 
-                                    Binding="{Binding AmountReal, StringFormat=¥{0:F2}}" 
+
+                <DataGridTextColumn Header="商品信息" Binding="{Binding GoodsInfo}" Width="150"/>
+
+                <DataGridTextColumn Header="数量" Binding="{Binding TotalQuantity}" Width="50"/>
+
+                <DataGridTextColumn Header="金额"
+                                    Binding="{Binding AmountReal, StringFormat=¥{0:F2}}"
                                     Width="70"/>
                 
                 <DataGridTextColumn Header="快递单号" Binding="{Binding TrackingNumber}" Width="150"/>