fix: align diary diet row and hide terminal cancel

- show only the personal diet name in the diary and keep the plan day chip
- hide consultation cancellation for terminal and non-cancellable states
- enable the refund form only for paid, started and in-progress plans
- cover diary rows and order info cancel visibility with tests

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

@@ -27,9 +27,7 @@ void main() {
       await tester.pumpWidget(
         createTestWidget(
           const ChosenDietWidgetContent(
-            currentDietDay: 5,
             dietName: 'Test Diet',
-            dietDuration: 14,
             dietId: 1,
           ),
         ),
@@ -38,15 +36,14 @@ void main() {
 
       expect(find.byType(ChosenDietWidgetContent), findsOneWidget);
       expect(find.text('Test Diet'), findsOneWidget);
+      expect(find.textContaining('из 14'), findsNothing);
     });
 
-    testWidgets('displays current day and duration', (tester) async {
+    testWidgets('does not display current day and duration', (tester) async {
       await tester.pumpWidget(
         createTestWidget(
           const ChosenDietWidgetContent(
-            currentDietDay: 7,
             dietName: 'Test Diet',
-            dietDuration: 21,
             dietId: 1,
           ),
         ),
@@ -54,15 +51,14 @@ void main() {
       await tester.pumpAndSettle();
 
       expect(find.byType(ChosenDietWidgetContent), findsOneWidget);
+      expect(find.textContaining('из 21'), findsNothing);
     });
 
     testWidgets('displays diet name with underline', (tester) async {
       await tester.pumpWidget(
         createTestWidget(
           const ChosenDietWidgetContent(
-            currentDietDay: 1,
             dietName: 'My Diet',
-            dietDuration: 7,
             dietId: 1,
           ),
         ),
@@ -70,6 +66,7 @@ void main() {
       await tester.pumpAndSettle();
 
       expect(find.text('My Diet'), findsOneWidget);
+      expect(find.textContaining('из 7'), findsNothing);
     });
   });
 }

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

@@ -100,6 +100,17 @@ void main() {
       await tester.pumpWidget(wrap(const ChosenDietWidget(), cubit));
       await tester.pump();
       expect(find.text('Diet'), findsOneWidget);
+      expect(find.textContaining('из 7'), findsNothing);
+    });
+
+    testWidgets('ChosenDietWidget hides diet day while plan keeps its day', (tester) async {
+      final cubit = FakeDiaryCubit(loadedState(hasDiet: true, hasPlan: true));
+      await tester.pumpWidget(wrap(const Column(children: [ChosenPlanWidget(), ChosenDietWidget()]), cubit));
+      await tester.pump();
+      expect(find.text('Plan'), findsOneWidget);
+      expect(find.textContaining('из 30'), findsOneWidget);
+      expect(find.text('Diet'), findsOneWidget);
+      expect(find.textContaining('из 7'), findsNothing);
     });
 
     testWidgets('AddProductButtonWidget renders for loaded state', (tester) async {