feat(auth): add comprehensive logging to WechatPhoneLogin method

- Add ILogger<LoginService> dependency injection to LoginService
- Add logging at method entry point with OpenId and PhoneNumber parameters
- Add logging for phone number query results and user lookup
- Add logging for WeChat record queries by UserId
- Add logging for OpenId duplicate detection and reassignment logic
- Add logging for new WeChat record creation
- Add logging for new user registration flow
- Add logging for successful login completion
- Improve debugging and monitoring capabilities for WeChat phone login authentication flow

server/webapi/LiveForum/LiveForum.Service/Auth/LoginService.cs

@@ -12,6 +12,7 @@ using LiveForum.Model.Enum;
 using LiveForum.Model.Enum.Users;
 
 using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 
 using System.Security.Claims;
@@ -38,6 +39,7 @@ namespace LiveForum.Service.Auth
         private readonly IUserInfoService _userInfoService;
         private readonly IBaseRepository<T_IdentityGroups> _identityGroupsRepository;
         private readonly IBaseRepository<T_UserIdentityGroups> _userIdentityGroupsRepository;
+        private readonly ILogger<LoginService> _logger;
 
         /// <summary>
         /// 注意，要先创建私有对象，在构造函数中进行赋值
@@ -53,6 +55,7 @@ namespace LiveForum.Service.Auth
         /// <param name="userInfoService">用户信息服务</param>
         /// <param name="identityGroupsRepository">身份组仓储类</param>
         /// <param name="userIdentityGroupsRepository">用户身份组关联仓储类</param>
+        /// <param name="logger">日志记录器</param>
         public LoginService(IJwtAuthManager jwtAuthManager,
             IBaseRepository<T_Users> userRepository,
             IBaseRepository<T_UserTokens> userTokensRepository,
@@ -63,7 +66,8 @@ namespace LiveForum.Service.Auth
             IOptionsSnapshot<AppSettings> appSettingsSnapshot,
             IUserInfoService userInfoService,
             IBaseRepository<T_IdentityGroups> identityGroupsRepository,
-            IBaseRepository<T_UserIdentityGroups> userIdentityGroupsRepository)
+            IBaseRepository<T_UserIdentityGroups> userIdentityGroupsRepository,
+            ILogger<LoginService> logger)
         {
             _jwtAuthManager = jwtAuthManager;
             _userRepository = userRepository;
@@ -76,6 +80,7 @@ namespace LiveForum.Service.Auth
             _userInfoService = userInfoService;
             _identityGroupsRepository = identityGroupsRepository;
             _userIdentityGroupsRepository = userIdentityGroupsRepository;
+            _logger = logger;
         }
 
         /// <summary>
@@ -535,6 +540,8 @@ namespace LiveForum.Service.Auth
             if (string.IsNullOrEmpty(openId)) throw new ArgumentNullException(nameof(openId));
             if (string.IsNullOrEmpty(phoneNumber)) throw new ArgumentNullException(nameof(phoneNumber));
 
+            _logger.LogInformation("[WechatPhoneLogin] 开始处理，OpenId={OpenId}, PhoneNumber={PhoneNumber}", openId, phoneNumber);
+
             var now = DateTime.Now;
             var clientIp = _httpContextAccessor.GetClientIpAddress();
             T_Users user = null;
@@ -545,6 +552,8 @@ namespace LiveForum.Service.Auth
                 .Where(x => x.PhoneNumber == phoneNumber)
                 .FirstAsync();
 
+            _logger.LogInformation("[WechatPhoneLogin] 手机号查询结果: UserId={UserId}", user?.Id);
+
             if (user != null)
             {
                 // 找到手机号用户，确保绑定/更新 OpenID
@@ -553,6 +562,9 @@ namespace LiveForum.Service.Auth
                     .Where(x => x.UserId == user.Id)
                     .FirstAsync();
 
+                _logger.LogInformation("[WechatPhoneLogin] 按UserId={UserId}查微信记录: WechatLoginId={WechatLoginId}, ExistingOpenId={ExistingOpenId}",
+                    user.Id, wechatLogin?.Id, wechatLogin?.OpenId);
+
                 if (wechatLogin == null)
                 {
                     // 当前用户没有微信记录，检查该 OpenId 是否已被其他用户占用
@@ -560,9 +572,14 @@ namespace LiveForum.Service.Auth
                         .Where(x => x.OpenId == openId)
                         .FirstAsync();
 
+                    _logger.LogInformation("[WechatPhoneLogin] 当前用户无微信记录，按OpenId查重: ExistingId={ExistingId}, ExistingUserId={ExistingUserId}",
+                        existingByOpenId?.Id, existingByOpenId?.UserId);
+
                     if (existingByOpenId != null)
                     {
                         // OpenId 已存在，将其重新关联到当前手机号用户
+                        _logger.LogInformation("[WechatPhoneLogin] OpenId已被UserId={OldUserId}占用，重新关联到UserId={NewUserId}",
+                            existingByOpenId.UserId, user.Id);
                         existingByOpenId.UserId = user.Id;
                         existingByOpenId.SessionKey = sessionKey;
                         existingByOpenId.LastLoginTime = now;
@@ -573,6 +590,7 @@ namespace LiveForum.Service.Auth
                     }
                     else
                     {
+                        _logger.LogInformation("[WechatPhoneLogin] OpenId不存在，新建微信记录，UserId={UserId}, OpenId={OpenId}", user.Id, openId);
                         wechatLogin = new T_WechatMiniProgramLogins
                         {
                             OpenId = openId,
@@ -604,6 +622,9 @@ namespace LiveForum.Service.Auth
                     .Where(x => x.OpenId == openId)
                     .FirstAsync();
 
+                _logger.LogInformation("[WechatPhoneLogin] 手机号未匹配用户，按OpenId查询: WechatLoginId={WechatLoginId}, UserId={UserId}",
+                    wechatLogin?.Id, wechatLogin?.UserId);
+
                 if (wechatLogin != null)
                 {
                     user = await _userRepository.Select
@@ -627,6 +648,8 @@ namespace LiveForum.Service.Auth
             // 3. 新用户注册
             if (user == null)
             {
+                _logger.LogInformation("[WechatPhoneLogin] 手机号和OpenId均未匹配，创建新用户。OpenId={OpenId}, PhoneNumber={PhoneNumber}", openId, phoneNumber);
+
                 var appSettings = _appSettingsSnapshot.Value;
                 var defaultNickName = string.IsNullOrEmpty(appSettings.UserDefaultName) ? "用户" : appSettings.UserDefaultName;
                 var defaultAvatar = string.IsNullOrEmpty(appSettings.UserDefaultIcon) ? "" : appSettings.UserDefaultIcon;
@@ -651,6 +674,7 @@ namespace LiveForum.Service.Auth
                     LastLoginTime = now
                 };
                 await _userRepository.InsertAsync(user);
+                _logger.LogInformation("[WechatPhoneLogin] 新用户创建成功，UserId={UserId}", user.Id);
 
                 // 新用户自动关联默认身份组
                 await AssignDefaultIdentityGroupAsync(user.Id);
@@ -667,6 +691,7 @@ namespace LiveForum.Service.Auth
                     UpdatedAt = now,
                 };
                 await _wechatMiniProgramLoginsRepository.InsertAsync(wechatLogin);
+                _logger.LogInformation("[WechatPhoneLogin] 新用户微信记录创建成功，WechatLoginId={WechatLoginId}", wechatLogin.Id);
             }
 
             // 更新用户最后登录信息
@@ -674,6 +699,8 @@ namespace LiveForum.Service.Auth
             user.LastLoginIp = clientIp;
             await _userRepository.UpdateAsync(user);
 
+            _logger.LogInformation("[WechatPhoneLogin] 登录成功，UserId={UserId}, WechatLoginId={WechatLoginId}", user.Id, wechatLogin?.Id);
+
             // 生成JWT Token
             var claims = new List<Claim>
             {