Fix displaying the external url of the link tag

lib/features/email/domain/repository/email_repository.dart

@@ -52,6 +52,8 @@ abstract class EmailRepository {
     AccountId accountId
   );
 
+  Future<List<EmailContent>> addTooltipWhenHoverOnLink(List<EmailContent> emailContents);
+
   Future<Email?> saveEmailAsDrafts(AccountId accountId, Email email);
 
   Future<bool> removeEmailDrafts(AccountId accountId, EmailId emailId);