chore: Ask for storage persistence

lib/utils/matrix_sdk_extensions/flutter_hive_collections_database.dart

@@ -8,6 +8,7 @@ import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:hive/hive.dart';
 import 'package:matrix/matrix.dart';
 import 'package:path_provider/path_provider.dart';
+import 'package:universal_html/html.dart' as html;
 
 class FlutterHiveCollectionsDatabase extends HiveCollectionsDatabase {
   FlutterHiveCollectionsDatabase(
@@ -29,7 +30,11 @@ class FlutterHiveCollectionsDatabase extends HiveCollectionsDatabase {
     HiveAesCipher? hiverCipher;
     try {
       // Workaround for secure storage is calling Platform.operatingSystem on web
-      if (kIsWeb) throw MissingPluginException();
+      if (kIsWeb) {
+        // ignore: unawaited_futures
+        html.window.navigator.storage?.persist();
+        throw MissingPluginException();
+      }
 
       const secureStorage = FlutterSecureStorage();
       final containsEncryptionKey =