优化

internal/biz/email.go

@@ -32,9 +32,17 @@ func (uc *EmailUsecase) Alert(ctx context.Context, subject, body string) error {
 	if !uc.repo.Enabled() {
 		return nil
 	}
-	recipients := uc.repo.DefaultRecipients()
-	if len(recipients) == 0 {
-		return nil
+	// ErrorToEmail splits the configured comma-separated recipient
+	// string, while its explicit test endpoint deliberately sends the whole
+	// value as one recipient. Keep those two contracts separate.
+	configured := uc.repo.DefaultRecipients()
+	recipients := make([]string, 0, len(configured))
+	for _, value := range configured {
+		parts := strings.Split(value, ",")
+		if len(parts) > 1 && parts[len(parts)-1] == "" {
+			parts = parts[:len(parts)-1]
+		}
+		recipients = append(recipients, parts...)
 	}
 	return uc.repo.Send(ctx, recipients, subject, body)
 }