fix: The message field in UnknownRemoteException is typed as String? and the condition will always be false.

lib/features/composer/domain/usecases/create_new_and_save_email_to_drafts_interactor.dart

@@ -69,7 +69,7 @@ class CreateNewAndSaveEmailToDraftsInteractor {
       }
     } catch (e) {
       logWarning('CreateNewAndSaveEmailToDraftsInteractor::execute: Exception: $e');
-      if (e is UnknownRemoteException && e.message is List<SavingEmailToDraftsCanceledException>) {
+      if (e is UnknownRemoteException && e.error is List<SavingEmailToDraftsCanceledException>) {
         if (createEmailRequest.draftsEmailId == null) {
           yield dartz.Left<Failure, Success>(SaveEmailAsDraftsFailure(SavingEmailToDraftsCanceledException()));
         } else {

lib/features/composer/domain/usecases/create_new_and_send_email_interactor.dart

@@ -66,7 +66,7 @@ class CreateNewAndSendEmailInteractor {
       }
     } catch (e) {
       logWarning('CreateNewAndSendEmailInteractor::execute: Exception: $e');
-      if (e is UnknownRemoteException && e.message is List<SendingEmailCanceledException>) {
+      if (e is UnknownRemoteException && e.error is List<SendingEmailCanceledException>) {
         yield dartz.Left<Failure, Success>(SendEmailFailure(
           exception: SendingEmailCanceledException(),
           session: sendingEmailArguments?.session,

lib/features/composer/presentation/widgets/saving_message_dialog_view.dart

@@ -82,7 +82,7 @@ class _SavingMessageDialogViewState extends State<SavingMessageDialogView> {
 
   void _handleErrorStream(Object error, StackTrace stackTrace) {
     logWarning('_SavingMessageDialogViewState::_handleErrorStream: Exception = $error');
-    if (error is UnknownRemoteException && error.message is List<SavingEmailToDraftsCanceledException>) {
+    if (error is UnknownRemoteException && error.error is List<SavingEmailToDraftsCanceledException>) {
       popBack(result: SaveEmailAsDraftsFailure(SavingEmailToDraftsCanceledException()));
     } else {
       popBack(result: SaveEmailAsDraftsFailure(error));

lib/features/composer/presentation/widgets/sending_message_dialog_view.dart

@@ -79,7 +79,7 @@ class _SendingMessageDialogViewState extends State<SendingMessageDialogView> {
 
   void _handleErrorStream(Object error, StackTrace stackTrace) {
     logWarning('_SendingMessageDialogViewState::_handleErrorStream: Exception = $error');
-    if (error is UnknownRemoteException && error.message is List<SendingEmailCanceledException>) {
+    if (error is UnknownRemoteException && error.error is List<SendingEmailCanceledException>) {
       popBack(result: SendEmailFailure(exception: SendingEmailCanceledException()));
     } else {
       popBack(result: SendEmailFailure(exception: error));

lib/main/exceptions/remote/unknown_remote_exception.dart

@@ -1,11 +1,18 @@
 import 'package:tmail_ui_user/main/exceptions/remote/remote_exception.dart';
 
 class UnknownRemoteException extends RemoteException {
+
+  final Object? error;
+
   const UnknownRemoteException({
     super.code,
     super.message,
+    this.error,
   });
 
   @override
   String get exceptionName => 'UnknownRemoteException';
+
+  @override
+  List<Object?> get props => [...super.props, error];
 }

lib/main/exceptions/thrower/remote_exception_thrower.dart

@@ -97,7 +97,7 @@ class RemoteExceptionThrower extends ExceptionThrower {
         } else if (underlyingError is OAuthAuthorizationError) {
           throw underlyingError;
         } else if (underlyingError != null) {
-          throw UnknownRemoteException(message: underlyingError.toString());
+          throw UnknownRemoteException(error: underlyingError);
         } else {
           throw const UnknownRemoteException();
         }