TF-105 [BUG] Fix no subject should show empty instead of null

lib/features/composer/presentation/composer_controller.dart

@@ -129,7 +129,7 @@ class ComposerController extends BaseController {
         && composerArguments.value?.presentationEmail != null
         && Get.context != null) {
       final subject = '${composerArguments.value!.emailActionType.prefixSubjectComposer(Get.context!)} '
-          '${composerArguments.value!.presentationEmail?.subject}';
+          '${composerArguments.value!.presentationEmail?.getEmailTitle()}';
       setSubjectEmail(subject);
       subjectEmailInputController.text = subject;
     }

lib/features/email/presentation/email_view.dart

@@ -117,7 +117,7 @@ class EmailView extends GetView {
     return Padding(
       padding: EdgeInsets.only(left: 8, top: 4, bottom: 16),
       child: Text(
-          '${emailController.mailboxDashBoardController.selectedEmail.value?.subject}',
+          '${emailController.mailboxDashBoardController.selectedEmail.value?.getEmailTitle()}',
           style: TextStyle(fontSize: 18, color: AppColor.mailboxTextColor, fontWeight: FontWeight.w500)
       ));
   }