refactor: 重构用户与商品模块，统一业务模型与服务

1.  新增用户状态枚举UserStatusEnum，统一用户状态定义
2.  重构用户体系：合并WxUser与User实体为Users实体，统一用户管理
3.  新增微信小程序认证相关服务与控制器，实现一键登录功能
4.  新增商品管理完整服务与控制器，修复商品表字段映射问题
5.  删除冗余的WxUser相关服务与控制器代码
6.  新增Newtonsoft.Json依赖用于微信接口响应解析
7.  清理无用的文件夹引用配置

QYZH.InteractiveMagazine.Models/Dto/Mall/ProductDto.cs

@@ -0,0 +1,156 @@
+using QYZH.InteractiveMagazine.Models.Dto;
+
+namespace QYZH.InteractiveMagazine.Models.Dto;
+
+/// <summary>
+/// 商品创建/更新输入
+/// </summary>
+public class ProductInput
+{
+    /// <summary>
+    /// 商品名称
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 描述
+    /// </summary>
+    public string? Description { get; set; }
+
+    /// <summary>
+    /// 商品图片
+    /// </summary>
+    public string? ImageUrl { get; set; }
+
+    /// <summary>
+    /// 所需积分
+    /// </summary>
+    public int Price { get; set; }
+
+    /// <summary>
+    /// 商品类型: MakeUpCard, PetBg
+    /// </summary>
+    public string Type { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 售卖状态: OnSale, OffSale
+    /// </summary>
+    public string SaleStatus { get; set; } = "OnSale";
+
+    /// <summary>
+    /// 扩展数据
+    /// </summary>
+    public string? MetaData { get; set; }
+
+    /// <summary>
+    /// 是否上架
+    /// </summary>
+    public bool IsActive { get; set; } = true;
+
+    /// <summary>
+    /// 库存(-1无限)
+    /// </summary>
+    public int Stock { get; set; } = -1;
+}
+
+/// <summary>
+/// 商品输出
+/// </summary>
+public class ProductOutput
+{
+    /// <summary>
+    /// 主键ID
+    /// </summary>
+    public long Id { get; set; }
+
+    /// <summary>
+    /// 商品名称
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 描述
+    /// </summary>
+    public string? Description { get; set; }
+
+    /// <summary>
+    /// 商品图片
+    /// </summary>
+    public string? ImageUrl { get; set; }
+
+    /// <summary>
+    /// 所需积分
+    /// </summary>
+    public int Price { get; set; }
+
+    /// <summary>
+    /// 商品类型
+    /// </summary>
+    public string Type { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 售卖状态
+    /// </summary>
+    public string SaleStatus { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 扩展数据
+    /// </summary>
+    public string? MetaData { get; set; }
+
+    /// <summary>
+    /// 是否上架
+    /// </summary>
+    public bool IsActive { get; set; }
+
+    /// <summary>
+    /// 库存(-1无限)
+    /// </summary>
+    public int Stock { get; set; }
+
+    /// <summary>
+    /// 创建人
+    /// </summary>
+    public string? CreatedBy { get; set; }
+
+    /// <summary>
+    /// 创建时间
+    /// </summary>
+    public DateTime CreatedAt { get; set; }
+
+    /// <summary>
+    /// 更新人
+    /// </summary>
+    public string? UpdatedBy { get; set; }
+
+    /// <summary>
+    /// 更新时间
+    /// </summary>
+    public DateTime? UpdatedAt { get; set; }
+}
+
+/// <summary>
+/// 商品分页查询输入
+/// </summary>
+public class ProductQueryInput : PageQueryModel
+{
+    /// <summary>
+    /// 商品名称（模糊查询）
+    /// </summary>
+    public string? Name { get; set; }
+
+    /// <summary>
+    /// 商品类型
+    /// </summary>
+    public string? Type { get; set; }
+
+    /// <summary>
+    /// 售卖状态: OnSale, OffSale
+    /// </summary>
+    public string? SaleStatus { get; set; }
+
+    /// <summary>
+    /// 是否上架
+    /// </summary>
+    public bool? IsActive { get; set; }
+}