TF-105 [BUG] Fix loading is blinking when reading email

lib/features/email/domain/state/get_email_content_state.dart

@@ -1,13 +1,14 @@
 import 'package:core/core.dart';
-import 'package:model/email/email_content.dart';
+import 'package:model/model.dart';
 
 class GetEmailContentSuccess extends UIState {
-  final EmailContent? emailContent;
+  final List<EmailContent> emailContents;
+  final List<Attachment> attachments;
 
-  GetEmailContentSuccess(this.emailContent);
+  GetEmailContentSuccess(this.emailContents, this.attachments);
 
   @override
-  List<Object?> get props => [emailContent];
+  List<Object?> get props => [emailContents, attachments];
 }
 
 class GetEmailContentFailure extends FeatureFailure {

lib/features/email/domain/usecases/get_email_content_interactor.dart

@@ -15,7 +15,9 @@ class GetEmailContentInteractor {
     try {
       yield Right<Failure, Success>(LoadingState());
       final email = await emailRepository.getEmailContent(accountId, emailId);
-      yield Right<Failure, Success>(GetEmailContentSuccess(email.toEmailContent()));
+      yield Right<Failure, Success>(GetEmailContentSuccess(
+        email.emailContentList,
+        email.allAttachments));
     } catch (e) {
       yield Left(GetEmailContentFailure(e));
     }