TF-3691 Support HTML escaping in search snippets

Signed-off-by: dab246 <tdvu@linagora.com>

model/lib/extensions/presentation_email_extension.dart

@@ -4,6 +4,7 @@ import 'package:core/data/constants/constant.dart';
 import 'package:core/domain/extensions/datetime_extension.dart';
 import 'package:core/presentation/extensions/color_extension.dart';
 import 'package:core/utils/app_logger.dart';
+import 'package:core/utils/html/html_utils.dart';
 import 'package:http_parser/http_parser.dart';
 import 'package:jmap_dart_client/jmap/mail/email/email.dart';
 import 'package:jmap_dart_client/jmap/mail/email/email_address.dart';
@@ -185,10 +186,11 @@ extension PresentationEmailExtension on PresentationEmail {
     );
   }
 
-  String? _sanitizeSearchSnippet(String? searchSnippet) => searchSnippet
-    ?.replaceAll('\r', '')
-    .replaceAll('\n', '')
-    .replaceAll('\t', '');
+  String? _sanitizeSearchSnippet(String? searchSnippet) {
+    if (searchSnippet == null) return null;
+    return HtmlUtils.unescapeHtml(HtmlUtils.removeWhitespace(searchSnippet));
+  }
+
   String? get sanitizedSearchSnippetSubject => _sanitizeSearchSnippet(searchSnippetSubject);
   String? get sanitizedSearchSnippetPreview => _sanitizeSearchSnippet(searchSnippetPreview);
 }

model/pubspec.lock

@@ -592,6 +592,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.15.3"
+  html_unescape:
+    dependency: transitive
+    description:
+      name: html_unescape
+      sha256: "15362d7a18f19d7b742ef8dcb811f5fd2a2df98db9f80ea393c075189e0b61e3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
   http:
     dependency: transitive
     description: