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

lib/features/email/presentation/model/composer_arguments.dart

@@ -7,7 +7,8 @@ import 'package:model/model.dart';
 class ComposerArguments with EquatableMixin {
   final EmailActionType emailActionType;
   final PresentationEmail? presentationEmail;
-  final EmailContent? emailContent;
+  final List<EmailContent>? emailContents;
+  final List<Attachment>? attachments;
   final Session session;
   final UserProfile userProfile;
   final Map<Role, MailboxId> mapMailboxId;
@@ -16,7 +17,8 @@ class ComposerArguments with EquatableMixin {
   ComposerArguments({
     this.emailActionType = EmailActionType.compose,
     this.presentationEmail,
-    this.emailContent,
+    this.emailContents,
+    this.attachments,
     this.mailboxRole,
     required this.session,
     required this.userProfile,
@@ -27,7 +29,8 @@ class ComposerArguments with EquatableMixin {
   List<Object?> get props => [
     emailActionType,
     presentationEmail,
-    emailContent,
+    emailContents,
+    attachments,
     mailboxRole,
     session,
     userProfile,

lib/features/email/presentation/model/message_content.dart

@@ -1,29 +0,0 @@
-
-import 'package:equatable/equatable.dart';
-import 'package:jmap_dart_client/jmap/account_id.dart';
-import 'package:tmail_ui_user/features/email/presentation/model/text_format.dart';
-import 'package:model/model.dart';
-
-class MessageContent with EquatableMixin {
-
-  final TextFormat textFormat;
-  final String content;
-
-  MessageContent(this.textFormat, this.content);
-
-  bool hasImageInlineWithCid() => content.contains('cid:');
-
-  String getContentHasInlineAttachment(String baseDownloadUrl, AccountId accountId, List<Attachment> attachments) {
-    var contentValid = content;
-    attachments.forEach((attachment) {
-      if(attachment.cid != null) {
-        final urlDownloadImage = attachment.getDownloadUrl(baseDownloadUrl, accountId);
-        contentValid = content.replaceAll('cid:${attachment.cid}', '$urlDownloadImage');
-      }
-    });
-    return contentValid;
-  }
-
-  @override
-  List<Object?> get props => [textFormat, content];
-}

lib/features/email/presentation/model/text_format.dart

@@ -1,5 +0,0 @@
-
-enum TextFormat {
-  HTML,
-  PLAIN
-}

lib/features/email/presentation/model/web_view_state.dart

@@ -4,6 +4,13 @@ import 'package:core/core.dart';
 class WebViewLoadingState extends UIState {
   WebViewLoadingState();
 
+  @override
+  List<Object?> get props => [];
+}
+
+class WebViewLoadCompletedState extends UIState {
+  WebViewLoadCompletedState();
+
   @override
   List<Object?> get props => [];
 }