TF-1899 Store session as string to hive

(cherry picked from commit 2f570681d32b5b234f60f9e4d7f13e69a5bb2b31)

lib/features/session/data/extensions/session_hive_obj_extension.dart

@@ -1,7 +1,9 @@
 
+import 'dart:convert';
+
 import 'package:jmap_dart_client/jmap/core/session/session.dart';
 import 'package:tmail_ui_user/features/session/data/model/session_hive_obj.dart';
 
 extension SessionHiveObjExtension on SessionHiveObj {
-  Session toSession() => Session.fromJson(values);
+  Session toSession() => Session.fromJson(jsonDecode(value));
 }

lib/features/session/data/model/session_hive_obj.dart

@@ -10,12 +10,12 @@ class SessionHiveObj extends HiveObject with EquatableMixin {
   static const String keyValue = 'session';
 
   @HiveField(0)
-  final Map<String, dynamic> values;
+  final String value;
 
   SessionHiveObj({
-    required this.values
+    required this.value
   });
 
   @override
-  List<Object?> get props => [values];
+  List<Object?> get props => [value];
 }

lib/features/session/domain/extensions/session_extensions.dart

@@ -1,4 +1,6 @@
 
+import 'dart:convert';
+
 import 'package:core/presentation/extensions/uri_extension.dart';
 import 'package:jmap_dart_client/http/converter/state_converter.dart';
 import 'package:jmap_dart_client/http/converter/user_name_converter.dart';
@@ -32,7 +34,7 @@ extension SessionExtensions on Session {
     return val;
   }
 
-  SessionHiveObj toHiveObj() => SessionHiveObj(values: toJson());
+  SessionHiveObj toHiveObj() => SessionHiveObj(value: jsonEncode(toJson()));
 
   String getQualifiedApiUrl({String? baseUrl}) {
     if (baseUrl != null) {