TF-185 [BUG] Fix can not display all parts of email which have multiple html part

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

@@ -7,7 +7,7 @@ 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;
@@ -17,7 +17,7 @@ class ComposerArguments with EquatableMixin {
   ComposerArguments({
     this.emailActionType = EmailActionType.compose,
     this.presentationEmail,
-    this.emailContent,
+    this.emailContents,
     this.attachments,
     this.mailboxRole,
     required this.session,
@@ -28,8 +28,7 @@ class ComposerArguments with EquatableMixin {
   @override
   List<Object?> get props => [
     emailActionType,
-    presentationEmail,
-    emailContent,
+    emailContents,
     attachments,
     mailboxRole,
     session,

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

@@ -1,16 +0,0 @@
-
-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 => [];
-}