TF-2717 Get identity when open app, if not get identity, get whenever open composer

lib/features/email/presentation/extensions/composer_arguments_extension.dart

@@ -0,0 +1,24 @@
+import 'package:jmap_dart_client/jmap/identities/identity.dart';
+import 'package:tmail_ui_user/features/email/presentation/model/composer_arguments.dart';
+
+extension ComposerArgumentsExtension on ComposerArguments {
+
+  ComposerArguments withIdentity({List<Identity>? identities}) {
+    return ComposerArguments(
+      emailActionType: emailActionType,
+      presentationEmail: presentationEmail,
+      emailContents: emailContents,
+      attachments: attachments,
+      mailboxRole: mailboxRole,
+      listEmailAddress: listEmailAddress,
+      listSharedMediaFile: listSharedMediaFile,
+      sendingEmail: sendingEmail,
+      subject: subject,
+      body: body,
+      messageId: messageId,
+      references: references,
+      previousEmailId: previousEmailId,
+      identities: identities,
+    );
+  }
+}

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

@@ -1,3 +1,4 @@
+import 'package:jmap_dart_client/jmap/identities/identity.dart';
 import 'package:jmap_dart_client/jmap/mail/email/email.dart';
 import 'package:jmap_dart_client/jmap/mail/email/email_address.dart';
 import 'package:jmap_dart_client/jmap/mail/mailbox/mailbox.dart';
@@ -22,6 +23,7 @@ class ComposerArguments extends RouterArguments {
   final MessageIdsHeaderValue? messageId;
   final MessageIdsHeaderValue? references;
   final EmailId? previousEmailId;
+  final List<Identity>? identities;
 
   ComposerArguments({
     this.emailActionType = EmailActionType.compose,
@@ -37,6 +39,7 @@ class ComposerArguments extends RouterArguments {
     this.messageId,
     this.references,
     this.previousEmailId,
+    this.identities,
   });
 
   factory ComposerArguments.fromSendingEmail(SendingEmail sendingEmail) =>
@@ -170,5 +173,6 @@ class ComposerArguments extends RouterArguments {
     body,
     messageId,
     references,
+    identities,
   ];
 }