TF-4050 Preview and download uploaded file in composer on web

lib/features/base/base_controller.dart

@@ -16,6 +16,7 @@ import 'package:jmap_dart_client/jmap/core/session/session.dart';
 import 'package:model/model.dart';
 import 'package:rule_filter/rule_filter/capability_rule_filter.dart';
 import 'package:tmail_ui_user/features/base/before_reconnect_manager.dart';
+import 'package:tmail_ui_user/features/base/mixin/emit_state_mixin.dart';
 import 'package:tmail_ui_user/features/base/mixin/logout_mixin.dart';
 import 'package:tmail_ui_user/features/base/mixin/popup_context_menu_action_mixin.dart';
 import 'package:tmail_ui_user/features/caching/caching_manager.dart';
@@ -63,7 +64,7 @@ import 'package:tmail_ui_user/main/utils/twake_app_manager.dart';
 import 'package:uuid/uuid.dart';
 
 abstract class BaseController extends GetxController
-    with PopupContextMenuActionMixin, LogoutMixin {
+    with PopupContextMenuActionMixin, LogoutMixin, EmitStateMixin {
 
   final CachingManager cachingManager = Get.find<CachingManager>();
   final LanguageCacheManager languageCacheManager = Get.find<LanguageCacheManager>();

lib/features/base/mixin/emit_state_mixin.dart

@@ -0,0 +1,12 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:dartz/dartz.dart';
+import 'package:tmail_ui_user/features/base/base_controller.dart';
+
+mixin EmitStateMixin {
+  void emitFailure({
+    required BaseController controller,
+    required FeatureFailure failure,
+  }) {
+    controller.consumeState(Stream.value(Left(failure)));
+  }
+}