feat(insights): first isights impemetation

test/features/profile/models/weight_model_test.dart

@@ -1,3 +1,4 @@
+import 'package:eatvio_app/features/profile/models/circumference_model.dart';
 import 'package:eatvio_app/features/profile/models/weight_model.dart';
 import 'package:flutter_test/flutter_test.dart';
 
@@ -42,6 +43,51 @@ void main() {
       expect(json['created_at'], isA<String>());
       expect(json['updated_at'], isA<String>());
     });
+
+    Map<String, dynamic> json({Object? weight = 72.3, Object? bmi = 22.4}) => {
+      'id': 1,
+      'user_id': 2,
+      'weight': weight,
+      'created_at': '2026-11-01T10:00:00.000000Z',
+      'updated_at': '2026-11-01T10:00:00.000000Z',
+      'bmi': bmi,
+    };
+
+    test('парсит дробный weight', () {
+      final model = WeightModel.fromJson(json());
+
+      expect(model.weight, 72.3);
+      expect(model.bmi, 22.4);
+    });
+
+    test('парсит целый weight как double', () {
+      final model = WeightModel.fromJson(json(weight: 72));
+
+      expect(model.weight, 72.0);
+    });
+
+    test('допускает bmi: null (рост не указан)', () {
+      final model = WeightModel.fromJson(json(bmi: null));
+
+      expect(model.bmi, isNull);
+    });
+  });
+
+  group('CircumferenceModel', () {
+    test('парсит целые и дробные значения (прореженные средние)', () {
+      final model = CircumferenceModel.fromJson({
+        'id': 1,
+        'user_id': 2,
+        'chest_circumference': 95,
+        'waist_circumference': 80.5,
+        'hip_circumference': 100,
+        'created_at': '2026-11-01T10:00:00.000000Z',
+        'updated_at': '2026-11-01T10:00:00.000000Z',
+      });
+
+      expect(model.chestCircumference, 95.0);
+      expect(model.waistCircumference, 80.5);
+      expect(model.hipCircumference, 100.0);
+    });
   });
 }
-