TF-3416 Handle open EML attachment in EML previewer

lib/main/localizations/app_localizations.dart

@@ -4307,4 +4307,11 @@ class AppLocalizations {
       name: 'previewEmailFromEMLFileFailed',
     );
   }
+
+  String get cannotOpenNewWindow {
+    return Intl.message(
+      'Cannot open new window',
+      name: 'cannotOpenNewWindow',
+    );
+  }
 }

lib/main/routes/route_utils.dart

@@ -252,4 +252,7 @@ abstract class RouteUtils {
       || navigationRouter.subject?.isNotEmpty == true
       || navigationRouter.body?.isNotEmpty == true;
   }
+
+  static String get emailEMLPreviewerRoutePath =>
+      _createEmailEMLPreviewerServicePath('$baseOriginUrl${AppRoutes.emailEMLPreviewer}').path;
 }

lib/main/utils/toast_manager.dart

@@ -1,3 +1,4 @@
+import 'package:core/domain/exceptions/web_session_exception.dart';
 import 'package:core/presentation/state/failure.dart';
 import 'package:core/presentation/utils/app_toast.dart';
 import 'package:core/utils/app_logger.dart';
@@ -89,7 +90,11 @@ class ToastManager {
     } else if (failure is ParseEmailByBlobIdFailure) {
       message = AppLocalizations.of(currentContext!).parseEmailByBlobIdFailed;
     } else if (failure is PreviewEmailFromEmlFileFailure) {
-      message = AppLocalizations.of(currentContext!).previewEmailFromEMLFileFailed;
+      if (failure.exception is CannotOpenNewWindowException) {
+        message = AppLocalizations.of(currentContext!).cannotOpenNewWindow;
+      } else {
+        message = AppLocalizations.of(currentContext!).previewEmailFromEMLFileFailed;
+      }
     }
 
     if (message?.isNotEmpty == true) {