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.WebApi/Controllers/WeChat/WeChatAuthController.cs

@@ -0,0 +1,49 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using QYZH.InteractiveMagazine.IService;
+using QYZH.InteractiveMagazine.IService.Dto;
+using QYZH.InteractiveMagazine.Models.Common;
+using QYZH.InteractiveMagazine.Models.Dto;
+
+namespace QYZH.InteractiveMagazine.WebApi.Controllers.WeChat;
+
+/// <summary>
+/// 微信小程序认证控制器
+/// </summary>
+public class WeChatAuthController : WeChatBaseController
+{
+    private readonly IWeChatAuthService _weChatAuthService;
+    private readonly ILogger<WeChatAuthController> _logger;
+
+    public WeChatAuthController(IWeChatAuthService weChatAuthService, ILogger<WeChatAuthController> logger)
+    {
+        _weChatAuthService = weChatAuthService;
+        _logger = logger;
+    }
+
+    /// <summary>
+    /// 微信小程序一键登录
+    /// </summary>
+    /// <param name="input">登录输入（含微信 code）</param>
+    /// <returns>登录结果（含 Token 和用户信息）</returns>
+    [AllowAnonymous]
+    [HttpPost("login")]
+    public async Task<BaseResponse<WeChatLoginOutput>> LoginAsync([FromBody] WeChatLoginInput input)
+    {
+        try
+        {
+            var result = await _weChatAuthService.LoginAsync(input);
+            return Success(result);
+        }
+        catch (BusinessException ex)
+        {
+            _logger.LogWarning(ex, "微信登录业务异常: {Message}", ex.Message);
+            return BaseResponse<WeChatLoginOutput>.Fail(ex.Message);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "微信登录系统异常");
+            return BaseResponse<WeChatLoginOutput>.Fail("微信登录失败，请稍后重试");
+        }
+    }
+}