feat(dependencies): add rxdart package and improve string extension methods for better handling of empty strings and gender parsing

test/features/chat/models/websocket_info_model_test.dart

@@ -0,0 +1,38 @@
+import 'package:eatvio_app/features/chat/models/websocket_info_model.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('WebsocketInfoModel', () {
+    test('создает WebsocketInfoModel с правильными значениями', () {
+      const model = WebsocketInfoModel(
+        key: 'test-key',
+        host: 'localhost',
+        port: '6001',
+        cluster: 'mt1',
+        userId: 123,
+      );
+
+      expect(model.key, 'test-key');
+      expect(model.host, 'localhost');
+      expect(model.port, '6001');
+      expect(model.cluster, 'mt1');
+      expect(model.userId, 123);
+    });
+
+    test('fromJson создает WebsocketInfoModel из JSON', () {
+      final json = {
+        'key': 'test-key',
+        'host': 'localhost',
+        'port': '6001',
+        'cluster': 'mt1',
+        'user_id': 123,
+      };
+
+      final model = WebsocketInfoModel.fromJson(json);
+
+      expect(model.key, 'test-key');
+      expect(model.userId, 123);
+    });
+  });
+}
+