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/userRegisterLogic.go

@@ -147,7 +147,8 @@ func (l *UserRegisterLogic) UserRegister(req *types.UserRegisterRequest) (resp *
 	}
 
 	// Activate trial subscription after transaction success (moved outside transaction to reduce lock time)
-	if l.svcCtx.Config.Register.EnableTrial {
+	rc := l.svcCtx.Config.Register
+	if rc.EnableTrial && (!rc.EnableTrialEmailWhitelist || IsEmailDomainWhitelisted(req.Email, rc.TrialEmailDomainWhitelist)) {
 		trialSubscribe, err = l.activeTrial(userInfo.Id)
 		if err != nil {
 			l.Errorw("Failed to activate trial subscription", logger.Field("error", err.Error()))
@@ -156,7 +157,7 @@ func (l *UserRegisterLogic) UserRegister(req *types.UserRegisterRequest) (resp *
 	}
 
 	// Clear cache after transaction success
-	if l.svcCtx.Config.Register.EnableTrial && trialSubscribe != nil {
+	if trialSubscribe != nil {
 		// Trigger user group recalculation (runs in background)
 		go func() {
 			ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)