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

test/features/feed/models/comment_model_test.dart

@@ -0,0 +1,69 @@
+import 'package:eatvio_app/core/models/pagination_model.dart';
+import 'package:eatvio_app/features/feed/models/comment_model.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('CommentModel', () {
+    test('создает CommentModel с правильными значениями', () {
+      final comment = Comment(
+        id: 1,
+        authorName: 'Author Name',
+        authorSlug: 'author',
+        authorProfileIcon: 'https://example.com/icon.jpg',
+        body: 'Test comment',
+        childrenComments: [],
+        createdAt: DateTime(2024, 1, 1),
+      );
+
+      final model = CommentModel(
+        data: [comment],
+        links: const Links(
+          first: 'https://example.com?page=1',
+          last: 'https://example.com?page=1',
+          prev: null,
+          next: null,
+        ),
+        meta: const Meta(
+          currentPage: 1,
+          from: 1,
+          lastPage: 1,
+          links: [],
+          perPage: 10,
+          to: 1,
+          total: 1,
+        ),
+      );
+
+      expect(model.data.length, 1);
+      expect(model.data.first.id, 1);
+      expect(model.data.first.body, 'Test comment');
+    });
+  });
+
+  group('Comment', () {
+    test('создает Comment с вложенными комментариями', () {
+      final childComment = Comment(
+        id: 2,
+        authorName: 'Child Author',
+        authorSlug: 'child-author',
+        authorProfileIcon: 'https://example.com/icon2.jpg',
+        body: 'Child comment',
+        childrenComments: [],
+        createdAt: DateTime(2024, 1, 2),
+      );
+
+      final parentComment = Comment(
+        id: 1,
+        authorName: 'Author Name',
+        authorSlug: 'author',
+        authorProfileIcon: 'https://example.com/icon.jpg',
+        body: 'Parent comment',
+        childrenComments: [childComment],
+        createdAt: DateTime(2024, 1, 1),
+      );
+
+      expect(parentComment.childrenComments.length, 1);
+      expect(parentComment.childrenComments.first.id, 2);
+    });
+  });
+}