feat(wechat-auth): 实现微信同一OpenId下多用户切换功能

1. 新增用户实体字段IsLastOnline标记上次在线用户
2. 重构微信登录逻辑，返回同一OpenId下的所有用户列表而非单用户
3. 新增SwitchUserAsync服务方法与控制器接口，支持同OpenId下切换用户
4. 添加用户实体到输出DTO的映射工具方法
5. 实现切换用户时的身份校验、Token刷新与在线状态更新

QYZH.InteractiveMagazine.Models/Dto/WeChat/WeChatDto.cs

@@ -24,20 +24,15 @@ public class WeChatLoginOutput
     /// </summary>
     public string Token { get; set; } = string.Empty;
 
-    /// <summary>
-    /// 用户ID
-    /// </summary>
-    public long UserId { get; set; }
-
-    /// <summary>
-    /// 用户名
-    /// </summary>
-    public string UserName { get; set; } = string.Empty;
-
     /// <summary>
     /// 微信OpenId
     /// </summary>
     public string OpenId { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 该 OpenId 下的用户列表
+    /// </summary>
+    public List<WxUserOutput> Users { get; set; } = [];
 }
 
 /// <summary>
@@ -151,6 +146,11 @@ public class WxUserOutput
     /// </summary>
     public int GrowthPoints { get; set; }
 
+    /// <summary>
+    /// 是否上次在线用户
+    /// </summary>
+    public bool IsLastOnline { get; set; }
+
     /// <summary>
     /// 创建人
     /// </summary>
@@ -225,3 +225,30 @@ public class WxCode2SessionResponse
     public string? ErrMsg { get; set; }
 }
 
+/// <summary>
+/// 微信切换用户输入
+/// </summary>
+public class WeChatSwitchUserInput
+{
+    /// <summary>
+    /// 目标用户ID
+    /// </summary>
+    public long UserId { get; set; }
+}
+
+/// <summary>
+/// 微信切换用户输出
+/// </summary>
+public class WeChatSwitchUserOutput
+{
+    /// <summary>
+    /// 新的访问令牌
+    /// </summary>
+    public string Token { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 当前切换的用户详情
+    /// </summary>
+    public WxUserOutput User { get; set; } = new();
+}
+

QYZH.InteractiveMagazine.Models/Entity/Users.cs

@@ -67,5 +67,12 @@ namespace QYZH.InteractiveMagazine.Models.Entity
         /// </summary>           
         public string Phone { get; set; }
 
+        /// <summary>
+        /// Desc:是否上次在线用户
+        /// Default:0
+        /// Nullable:False
+        /// </summary>           
+        public bool IsLastOnline { get; set; }
+
     }
 }