fix: 优化 Windows 7 兼容性，调整 Excel 导出模板

- setup.iss: 改用 classic 向导样式，降低 MinVersion 要求
- setup.iss: 添加 x86/x64 架构支持声明
- Excel 导出: 移除"订单金额"列，新增"数量"列
- Order 模型: 添加 TotalQuantity 属性计算商品总数量

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

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

PackagingMallShipper/Models/Order.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Newtonsoft.Json;
 
 namespace PackagingMallShipper.Models
@@ -59,6 +60,23 @@ namespace PackagingMallShipper.Models
                 }
             }
         }
+
+        public int TotalQuantity
+        {
+            get
+            {
+                if (string.IsNullOrEmpty(GoodsJson)) return 0;
+                try
+                {
+                    var goods = JsonConvert.DeserializeObject<List<GoodsItem>>(GoodsJson);
+                    return goods.Sum(g => g.Number);
+                }
+                catch
+                {
+                    return 0;
+                }
+            }
+        }
     }
 
     public class GoodsItem

PackagingMallShipper/Services/ExcelService.cs

@@ -31,7 +31,7 @@ namespace PackagingMallShipper.Services
                 {
                     "订单号", "下单时间", "收件人", "联系电话",
                     "省份", "城市", "区县", "详细地址",
-                    "商品信息", "订单金额", "快递公司", "快递单号"
+                    "商品信息", "数量", "快递公司", "快递单号"
                 };
 
                 for (int i = 0; i < headers.Length; i++)
@@ -57,7 +57,7 @@ namespace PackagingMallShipper.Services
                     worksheet.Cell(row, 7).Value = order.LogisticsDistrict;
                     worksheet.Cell(row, 8).Value = order.LogisticsAddress;
                     worksheet.Cell(row, 9).Value = order.GoodsInfo;
-                    worksheet.Cell(row, 10).Value = order.AmountReal;
+                    worksheet.Cell(row, 10).Value = order.TotalQuantity;
                     worksheet.Cell(row, 11).Value = "";
                     worksheet.Cell(row, 12).Value = "";
                 }

setup.iss

@@ -23,10 +23,13 @@ Compression=lzma2/ultra64
 SolidCompression=yes
 ; 权限设置
 PrivilegesRequired=admin
-; 系统要求 - Windows 7 SP1 或更高版本
-MinVersion=6.1.7601
-; 安装向导设置
-WizardStyle=modern
+; 系统要求 - Windows 7 或更高版本
+; 注意：.NET Framework 4.6.2 需要 Windows 7 SP1，但安装程序本身可以在无SP1的Win7上运行并提示
+MinVersion=6.1
+; 架构支持 - 同时支持32位和64位系统
+ArchitecturesAllowed=x86compatible x64compatible
+; 安装向导设置 - 使用classic样式以获得最佳Windows 7兼容性
+WizardStyle=classic
 DisableProgramGroupPage=yes
 ; 卸载设置
 UninstallDisplayName={#MyAppName}