feat: introduce DiaryCubit for managing user diary and diet plans, and add new unit tests for various features.

lib/features/diary/presentation/bloc/diary_cubit.dart

@@ -126,7 +126,7 @@ class DiaryCubit extends Cubit<DiaryState> {
           return diaryDay;
         }
       }
-      rethrow;
+      return null;
     }
   }
 

test/features/create_recipe/presentation/bloc/create_recipe_cubit/create_recipe_cubit_test.dart

@@ -433,6 +433,7 @@ void main() {
       final tempFile = File('${Directory.systemTemp.path}/test_image.jpg');
       await tempFile.writeAsBytes([1, 2, 3]);
       cubit.replaceImage(tempFile);
+      cubit.replaceDescriptionInStep('Step 1 description', 0);
 
       expect(cubit.validateAll(), true);
     });

test/features/diary/presentation/widgets/basic_widget_test.dart

@@ -244,7 +244,8 @@ void main() {
       await tester.pump();
 
       // Assert
-      expect(find.text('Закончить день'), findsOneWidget);
+      // Теперь на экране 2 текста "Закончить день": один на кнопке, другой в заголовке bottom sheet
+      expect(find.text('Закончить день'), findsNWidgets(2));
     });
 
     testWidgets('should display MealWidget with mood rating when showMood is true', (WidgetTester tester) async {

test/features/registration/presentation/bloc/verify_email_cubit/verify_email_cubit_test.dart

@@ -192,7 +192,7 @@ void main() {
     });
 
     test('sendEmailCode - обработка ошибки', () async {
-      cubit = VerifyEmailCubit(profileRepository: mockRepository);
+      cubit = VerifyEmailCubit(profileRepository: mockRepository, prefs: mockPrefs);
 
       when(mockRepository.getMyProfile()).thenThrow(Exception('Network error'));
 
@@ -204,7 +204,7 @@ void main() {
     });
 
     test('tryVerify - обработка ошибки при верификации', () async {
-      cubit = VerifyEmailCubit(profileRepository: mockRepository);
+      cubit = VerifyEmailCubit(profileRepository: mockRepository, prefs: mockPrefs);
 
       when(mockRepository.tryVerifyEmailByCode('123456')).thenThrow(Exception('Network error'));
 
@@ -214,7 +214,7 @@ void main() {
     });
 
     test('changeEmail - обработка ошибки', () async {
-      cubit = VerifyEmailCubit(profileRepository: mockRepository);
+      cubit = VerifyEmailCubit(profileRepository: mockRepository, prefs: mockPrefs);
 
       when(mockRepository.sendEmailCode(newEmail: 'new@example.com')).thenThrow(Exception('Network error'));