feat: trial 赠送改为白名单邮箱域名控制

- 新增 EnableTrialEmailWhitelist + TrialEmailDomainWhitelist 配置
- 邮箱注册/登录：加白名单域名判断，域名匹配才赠送 trial
- 设备登录/手机注册：移除 activeTrial，不再自动赠送
- 绑定邮箱(bindEmailWithVerification)：绑定成功后检查白名单+防重复赠送
- 新增 IsEmailDomainWhitelisted 导出函数供跨包调用
- 清理 deviceLoginLogic/telephoneUserRegisterLogic 中的 activeTrial 死代码

Co-Authored-By: claude-flow <ruv@ruv.net>

internal/logic/auth/telephoneUserRegisterLogic.go

@@ -46,7 +46,6 @@ func NewTelephoneUserRegisterLogic(ctx context.Context, svcCtx *svc.ServiceConte
 
 func (l *TelephoneUserRegisterLogic) TelephoneUserRegister(req *types.TelephoneRegisterRequest) (resp *types.LoginResponse, err error) {
 	c := l.svcCtx.Config.Register
-	var trialSubscribe *user.Subscribe
 	// Check if the registration is stopped
 	if c.StopRegister {
 		return nil, errors.Wrapf(xerr.NewErrCode(xerr.StopRegister), "stop register")
@@ -141,39 +140,12 @@ func (l *TelephoneUserRegisterLogic) TelephoneUserRegister(req *types.TelephoneR
 		if err := db.Model(&user.User{}).Where("id = ?", userInfo.Id).Update("refer_code", userInfo.ReferCode).Error; err != nil {
 			return err
 		}
-		if l.svcCtx.Config.Register.EnableTrial {
-			// Active trial
-			var trialErr error
-			trialSubscribe, trialErr = l.activeTrial(userInfo.Id)
-			if trialErr != nil {
-				return trialErr
-			}
-		}
 		return nil
 	})
 	if err != nil {
 		return nil, err
 	}
 
-	// Clear cache after transaction success
-	if l.svcCtx.Config.Register.EnableTrial && trialSubscribe != nil {
-		// Clear user subscription cache
-		if err = l.svcCtx.UserModel.ClearSubscribeCache(l.ctx, trialSubscribe); err != nil {
-			l.Errorw("ClearSubscribeCache failed", logger.Field("error", err.Error()), logger.Field("userSubscribeId", trialSubscribe.Id))
-			// Don't return error, just log it
-		}
-		// Clear subscription cache
-		if err = l.svcCtx.SubscribeModel.ClearCache(l.ctx, trialSubscribe.SubscribeId); err != nil {
-			l.Errorw("ClearSubscribeCache failed", logger.Field("error", err.Error()), logger.Field("subscribeId", trialSubscribe.SubscribeId))
-			// Don't return error, just log it
-		}
-		// Clear all server cache
-		if err = l.svcCtx.NodeModel.ClearServerAllCache(l.ctx); err != nil {
-			l.Errorf("ClearServerAllCache error: %v", err.Error())
-			// Don't return error, just log it
-		}
-	}
-
 	// Bind device to user if identifier is provided
 	if req.Identifier != "" {
 		bindLogic := NewBindDeviceLogic(l.ctx, l.svcCtx)
@@ -261,32 +233,6 @@ func (l *TelephoneUserRegisterLogic) TelephoneUserRegister(req *types.TelephoneR
 	}, nil
 }
 
-func (l *TelephoneUserRegisterLogic) activeTrial(uid int64) (*user.Subscribe, error) {
-	sub, err := l.svcCtx.SubscribeModel.FindOne(l.ctx, l.svcCtx.Config.Register.TrialSubscribe)
-	if err != nil {
-		return nil, err
-	}
-	userSub := &user.Subscribe{
-		Id:          0,
-		UserId:      uid,
-		OrderId:     0,
-		SubscribeId: sub.Id,
-		StartTime:   time.Now(),
-		ExpireTime:  tool.AddTime(l.svcCtx.Config.Register.TrialTimeUnit, l.svcCtx.Config.Register.TrialTime, time.Now()),
-		Traffic:     sub.Traffic,
-		Download:    0,
-		Upload:      0,
-		Token:       uuidx.NewUUID().String(),
-		UUID:        uuidx.NewUUID().String(),
-		Status:      1,
-	}
-	err = l.svcCtx.UserModel.InsertSubscribe(l.ctx, userSub)
-	if err != nil {
-		return nil, err
-	}
-	return userSub, nil
-}
-
 func (l *TelephoneUserRegisterLogic) verifyCaptcha(req *types.TelephoneRegisterRequest) error {
 	verifyCfg, err := l.svcCtx.SystemModel.GetVerifyConfig(l.ctx)
 	if err != nil {