TF-806 open new tab when click link or tags a

core/lib/presentation/utils/html_transformer/message_content_transformer.dart

@@ -16,6 +16,7 @@ class MessageContentTransformer {
         DioClient? dioClient
       }
   ) async {
+    await _addTargetBlankInTagA(document);
     await Future.wait([
       if (configuration.domTransformers.isNotEmpty)
         ...configuration.domTransformers.map((domTransformer) async =>
@@ -26,6 +27,13 @@ class MessageContentTransformer {
     ]);
   }
 
+  Future _addTargetBlankInTagA(Document document) async {
+    final elements = document.querySelectorAll('a');
+    await Future.wait(elements.map((element) async {
+      element.attributes['target'] = '_blank';
+    }));
+  }
+
   Future<Document> toDocument(
       String message,
       {