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/emailLoginLogic.go

@@ -125,7 +125,8 @@ func (l *EmailLoginLogic) EmailLogin(req *types.EmailLoginRequest) (resp *types.
 			if err = db.Create(authInfo).Error; err != nil {
 				return err
 			}
-			if l.svcCtx.Config.Register.EnableTrial {
+			rc := l.svcCtx.Config.Register
+			if rc.EnableTrial && (!rc.EnableTrialEmailWhitelist || IsEmailDomainWhitelisted(req.Email, rc.TrialEmailDomainWhitelist)) {
 				if err = l.activeTrial(userInfo.Id); err != nil {
 					return err
 				}