feat: 新增微信公众号扫码注册功能及幂等处理

- 新增 `FuwuhaoConst` 常量类，统一缓存 Key 前缀管理
- `FuwuhaoOptions` 增加 FromUser、RedirectUri、PicUrl 配置项
- `FuwuhaoManager` 新增 `BuildRegisterMessage` 方法，构建注册引导图文消息
- `FuwuhaoService`
  - 增加 OpenId 与 Scene 绑定缓存，支持扫码注册有效期管理
  - 回调处理支持注册场景，返回图文消息引导用户注册
  - 新增注册接口 `RegisterByCodeAsync`，根据微信授权信息自动注册账号并更新场景状态
- `AccountManager` 注册方法增加分布式锁，防止重复注册，并校验用户名唯一性

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Managers/Fuwuhao/FuwuhaoManager.cs

@@ -19,7 +19,8 @@ public class FuwuhaoManager : DomainService
     private ISqlSugarRepository<AiUserExtraInfoEntity> _userRepository;
 
     public FuwuhaoManager(IOptions<FuwuhaoOptions> options, IHttpClientFactory httpClientFactory,
-        ISqlSugarRepository<AiUserExtraInfoEntity> userRepository, IDistributedCache<AccessTokenResponse> accessTokenCache)
+        ISqlSugarRepository<AiUserExtraInfoEntity> userRepository,
+        IDistributedCache<AccessTokenResponse> accessTokenCache)
     {
         _options = options.Value;
         _httpClientFactory = httpClientFactory;
@@ -97,7 +98,8 @@ public class FuwuhaoManager : DomainService
     /// <returns>用户基础信息响应对象</returns>
     private async Task<UserBaseInfoResponse> GetBaseUserInfoByCodeAsync(string code)
     {
-        var url = $"https://api.weixin.qq.com/sns/oauth2/access_token?appid={_options.AppId}&secret={_options.Secret}&code={code}&grant_type=authorization_code";
+        var url =
+            $"https://api.weixin.qq.com/sns/oauth2/access_token?appid={_options.AppId}&secret={_options.Secret}&code={code}&grant_type=authorization_code";
 
         var response = await _httpClientFactory.CreateClient().GetAsync(url);
         response.EnsureSuccessStatusCode();
@@ -116,10 +118,11 @@ public class FuwuhaoManager : DomainService
     /// </summary>
     /// <param name="code">授权码</param>
     /// <returns>用户信息响应对象</returns>
-    public async Task<UserInfoResponse> GetUserInfoByCodeAsync(string code)
+    public async Task<UserInfoResponse?> GetUserInfoByCodeAsync(string code)
     {
-       var baseUserInfo = await GetBaseUserInfoByCodeAsync(code);
-        var url = $"https://api.weixin.qq.com/sns/userinfo?access_token={baseUserInfo.AccessToken}&openid={baseUserInfo.OpenId}&lang=zh_CN";
+        var baseUserInfo = await GetBaseUserInfoByCodeAsync(code);
+        var url =
+            $"https://api.weixin.qq.com/sns/userinfo?access_token={baseUserInfo.AccessToken}&openid={baseUserInfo.OpenId}&lang=zh_CN";
 
         var response = await _httpClientFactory.CreateClient().GetAsync(url);
         response.EnsureSuccessStatusCode();
@@ -142,11 +145,11 @@ public class FuwuhaoManager : DomainService
     public void ValidateCallback(string signature, string timestamp, string nonce)
     {
         var token = _options.CallbackToken; // 您设置的token
-        
+
         // 将token、timestamp、nonce三个参数进行字典序排序
         var parameters = new[] { token, timestamp, nonce };
         Array.Sort(parameters);
-        
+
         // 将三个参数字符串拼接成一个字符串
         var concatenated = string.Join("", parameters);
 
@@ -164,8 +167,40 @@ public class FuwuhaoManager : DomainService
             }
         }
     }
-    
-    
+
+
+    /// <summary>
+    /// 构建引导注册图文消息体
+    /// </summary>
+    /// <param name="toUser">接收用户的OpenID</param>
+    /// <param name="title">图文消息标题</param>
+    /// <param name="description">图文消息描述</param>
+    /// <returns>XML格式的图文消息体</returns>
+    public string BuildRegisterMessage(string toUser, string title="意社区点击一键注册账号", string description="来自意社区SSO统一注册安全中心")
+    {
+        var createTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
+        var fromUser = _options.FromUser;
+        var url =
+            $"https://open.weixin.qq.com/connect/oauth2/authorize?appid={_options.AppId}&redirect_uri={_options.RedirectUri}&response_type=code&scope=snsapi_userinfo&state={createTime}#wechat_redirect";
+        var xml = $@"<xml>
+  <ToUserName><![CDATA[{toUser}]]></ToUserName>
+  <FromUserName><![CDATA[{fromUser}]]></FromUserName>
+  <CreateTime>{createTime}</CreateTime>
+  <MsgType><![CDATA[news]]></MsgType>
+  <ArticleCount>1</ArticleCount>
+  <Articles>
+    <item>
+      <Title><![CDATA[{title}]]></Title>
+      <Description><![CDATA[{description}]]></Description>
+      <PicUrl><![CDATA[{_options.PicUrl}]]></PicUrl>
+      <Url><![CDATA[{url}]]></Url>
+    </item>
+  </Articles>
+</xml>";
+        return xml;
+    }
+
+
     /// <summary>
     /// 处理回调逻辑
     /// </summary>

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Managers/Fuwuhao/FuwuhaoOptions.cs

@@ -6,7 +6,7 @@ public class FuwuhaoOptions
     /// 微信公众号AppId
     /// </summary>
     public string AppId { get; set; }
-    
+
     /// <summary>
     /// 微信公众号AppSecret
     /// </summary>
@@ -16,4 +16,19 @@ public class FuwuhaoOptions
     /// 回调token
     /// </summary>
     public string CallbackToken { get; set; }
+
+    /// <summary>
+    /// 微信公众号原始ID（用于FromUser）
+    /// </summary>
+    public string FromUser { get; set; }
+
+    /// <summary>
+    /// 微信网页授权跳转地址
+    /// </summary>
+    public string RedirectUri { get; set; }
+
+    /// <summary>
+    /// 图片地址
+    /// </summary>
+    public string PicUrl { get; set; }
 }