TF-4141 Show AI action tag in list emails

model/lib/email/presentation_email.dart

@@ -138,6 +138,9 @@ class PresentationEmail with EquatableMixin, SearchSnippetMixin {
 
   bool get isSubscribed => keywords?.containsKey(KeyWordIdentifierExtension.unsubscribeMail) == true;
 
+  bool get hasNeedAction =>
+      keywords?.containsKey(KeyWordIdentifierExtension.needActionMail) == true;
+
   bool get isAnsweredAndForwarded => isAnswered && isForwarded;
 
   bool get withAttachments => hasAttachment == true;

model/lib/extensions/keyword_identifier_extension.dart

@@ -5,6 +5,7 @@ import 'package:model/email/read_actions.dart';
 
 extension KeyWordIdentifierExtension on KeyWordIdentifier {
   static final unsubscribeMail = KeyWordIdentifier('\$unsubscribe');
+  static final needActionMail = KeyWordIdentifier('\$need-action');
 
   String generatePath() {
     return '${PatchObject.keywordsProperty}/$value';