Remove collapse expand signature button in Email View

Signed-off-by: dab246 <tdvu@linagora.com>
(cherry picked from commit 8b7f087a1dc1c31dcc5c41ca4a8f93a2fb741c62)

core/lib/presentation/utils/html_transformer/dom/remove_collapsed_signature_button_transformers.dart

@@ -0,0 +1,24 @@
+
+import 'package:core/data/network/dio_client.dart';
+import 'package:core/presentation/utils/html_transformer/base/dom_transformer.dart';
+import 'package:core/utils/app_logger.dart';
+import 'package:html/dom.dart';
+
+class RemoveCollapsedSignatureButtonTransformer extends DomTransformer {
+
+  const RemoveCollapsedSignatureButtonTransformer();
+
+  @override
+  Future<void> process({
+    required Document document,
+    required DioClient dioClient,
+    Map<String, String>? mapUrlDownloadCID,
+  }) async {
+    final elements = document.querySelectorAll('.tmail-signature-button');
+    log('RemoveCollapsedSignatureButtonTransformer::process:elements:: ${elements.length}');
+    await Future.wait(elements.map((element) async {
+      element.remove();
+    }));
+  }
+
+}

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

@@ -7,6 +7,7 @@ import 'package:core/presentation/utils/html_transformer/dom/add_tooltip_link_tr
 import 'package:core/presentation/utils/html_transformer/dom/blockcode_transformers.dart';
 import 'package:core/presentation/utils/html_transformer/dom/blockquoted_transformers.dart';
 import 'package:core/presentation/utils/html_transformer/dom/image_transformers.dart';
+import 'package:core/presentation/utils/html_transformer/dom/remove_collapsed_signature_button_transformers.dart';
 import 'package:core/presentation/utils/html_transformer/dom/remove_lazy_loading_for_background_image_transformers.dart';
 import 'package:core/presentation/utils/html_transformer/dom/remove_tooltip_link_transformers.dart';
 import 'package:core/presentation/utils/html_transformer/dom/script_transformers.dart';
@@ -40,6 +41,7 @@ class TransformConfiguration {
       const RemoveTooltipLinkTransformer(),
     const SignatureTransformer(),
     const RemoveLazyLoadingForBackgroundImageTransformer(),
+    const RemoveCollapsedSignatureButtonTransformer(),
   ]);
 
   factory TransformConfiguration.forDraftsEmail() => TransformConfiguration.empty();
@@ -53,6 +55,7 @@ class TransformConfiguration {
       const ImageTransformer(),
       const AddTooltipLinkTransformer(),
       const AddLazyLoadingForBackgroundImageTransformer(),
+      const RemoveCollapsedSignatureButtonTransformer(),
     ]
   );
 
@@ -92,6 +95,7 @@ class TransformConfiguration {
     AddTargetBlankInTagATransformer(),
     ImageTransformer(),
     AddLazyLoadingForBackgroundImageTransformer(),
+    RemoveCollapsedSignatureButtonTransformer(),
   ];
 
   static const List<TextTransformer> standardTextTransformers = [