fix

internal/biz/email.go

@@ -16,23 +16,8 @@ type EmailUsecase struct{ repo EmailRepo }
 
 func NewEmailUsecase(repo EmailRepo) *EmailUsecase { return &EmailUsecase{repo: repo} }
 
-func splitRecipients(value string) []string {
-	parts := strings.Split(value, ",")
-	result := make([]string, 0, len(parts))
-	for _, part := range parts {
-		if recipient := strings.TrimSpace(part); recipient != "" {
-			result = append(result, recipient)
-		}
-	}
-	return result
-}
-
 func (uc *EmailUsecase) Send(ctx context.Context, to, subject, body string) error {
-	recipients := splitRecipients(to)
-	if len(recipients) == 0 || subject == "" {
-		return errors.New("收件人和邮件标题不能为空")
-	}
-	return uc.repo.Send(ctx, recipients, subject, body)
+	return uc.repo.Send(ctx, strings.Split(to, ","), subject, body)
 }
 
 func (uc *EmailUsecase) Test(ctx context.Context) error {