feat(app): группированный сайдбар навигации на широком breakpoint

NavSidebar (>=1200): пункты меню сгруппированы под капс-заголовками,
у активного пункта левая акцентная полоска, у «Здоровье» — счётчик
замечаний качества данных из dataQualityProvider, внизу закреплён
профиль (аватар-инициал + email из meProvider). Список направлений
вынесен в nav_destinations.dart — общий для app_shell.dart и
nav_sidebar.dart. На 600–1200 остаётся свёрнутый NavigationRail: в
иконку-без-подписи заголовки групп и профиль всё равно не помещаются.

NavSidebar смонтирован всё время сессии и держит dataQualityProvider
и meProvider живыми — раньше эти запросы уходили только при открытии
Обзора/Здоровья/Настроек.

app/test/app_shell_test.dart

@@ -1,20 +1,57 @@
+import 'package:fintracker_api/fintracker_api.dart';
+import 'package:fintracker_app/core/api/common_providers.dart';
+import 'package:fintracker_app/core/cache/cached.dart';
+import 'package:fintracker_app/features/home/providers.dart';
 import 'package:fintracker_app/features/shell/app_shell.dart';
+import 'package:fintracker_app/features/shell/nav_destinations.dart';
+import 'package:fintracker_app/features/shell/nav_sidebar.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_test/flutter_test.dart';
 
+DataQualityRow _dataQualityRow(int id) => DataQualityRow(
+      checkName: 'x',
+      computedAt: DateTime(2026, 9, 19),
+      count: 1,
+      detail: 'issue $id',
+      id: id,
+      ref: null,
+      severity: 'warning',
+    );
+
 void main() {
+  // The sidebar (>=1200) watches meProvider and dataQualityProvider for the profile
+  // footer and the Здоровье counter — every wide-breakpoint pump needs both overridden.
   Widget wrap(double width, {String location = '/'}) {
-    return MediaQuery(
-      data: MediaQueryData(size: Size(width, 800)),
-      child: MaterialApp(
-        home: AppShell(location: location, child: Container()),
+    return ProviderScope(
+      overrides: [
+        meProvider.overrideWith((ref) async => UserOut(email: 'ada@example.com', id: 1)),
+        dataQualityProvider.overrideWith((ref) async => const Cached(<DataQualityRow>[])),
+      ],
+      child: MediaQuery(
+        data: MediaQueryData(size: Size(width, 800)),
+        child: MaterialApp(
+          home: AppShell(location: location, child: Container()),
+        ),
       ),
     );
   }
 
-  testWidgets('shows a NavigationRail on a wide surface', (tester) async {
+  testWidgets('shows the grouped sidebar on a wide surface', (tester) async {
     await tester.pumpWidget(wrap(1280));
+    await tester.pump();
+    expect(find.byType(NavSidebar), findsOneWidget);
+    expect(find.byType(NavigationRail), findsNothing);
+    expect(find.byType(NavigationBar), findsNothing);
+    for (final label in navGroupLabels.values) {
+      expect(find.text(label), findsOneWidget);
+    }
+  });
+
+  testWidgets('shows a collapsed NavigationRail on a medium surface', (tester) async {
+    await tester.pumpWidget(wrap(900));
     expect(find.byType(NavigationRail), findsOneWidget);
+    expect(find.byType(NavSidebar), findsNothing);
     expect(find.byType(NavigationBar), findsNothing);
   });
 
@@ -22,10 +59,11 @@ void main() {
     await tester.pumpWidget(wrap(400));
     expect(find.byType(NavigationBar), findsOneWidget);
     expect(find.byType(NavigationRail), findsNothing);
+    expect(find.byType(NavSidebar), findsNothing);
   });
 
   testWidgets('the resolve screen keeps Импорт selected', (tester) async {
-    await tester.pumpWidget(wrap(1280, location: '/instruments/pending'));
+    await tester.pumpWidget(wrap(900, location: '/instruments/pending'));
     final rail = tester.widget<NavigationRail>(find.byType(NavigationRail));
     expect(
       (rail.destinations[rail.selectedIndex!].label as Text).data,
@@ -34,11 +72,40 @@ void main() {
   });
 
   testWidgets('a nested route keeps its own section selected', (tester) async {
-    await tester.pumpWidget(wrap(1280, location: '/portfolio/instrument/311'));
+    await tester.pumpWidget(wrap(900, location: '/portfolio/instrument/311'));
     final rail = tester.widget<NavigationRail>(find.byType(NavigationRail));
     expect(
       (rail.destinations[rail.selectedIndex!].label as Text).data,
       'Портфель',
     );
   });
+
+  testWidgets('the sidebar keeps Импорт selected on the resolve screen', (tester) async {
+    await tester.pumpWidget(wrap(1280, location: '/instruments/pending'));
+    await tester.pump();
+    final sidebar = tester.widget<NavSidebar>(find.byType(NavSidebar));
+    expect(navDestinations[sidebar.selectedIndex].label, 'Импорт');
+  });
+
+  testWidgets('the sidebar shows the Здоровье issue count', (tester) async {
+    await tester.pumpWidget(
+      ProviderScope(
+        overrides: [
+          meProvider.overrideWith((ref) async => UserOut(email: 'ada@example.com', id: 1)),
+          dataQualityProvider.overrideWith(
+            (ref) async => Cached([
+              _dataQualityRow(1),
+              _dataQualityRow(2),
+            ]),
+          ),
+        ],
+        child: MediaQuery(
+          data: const MediaQueryData(size: Size(1280, 800)),
+          child: MaterialApp(home: AppShell(location: '/', child: Container())),
+        ),
+      ),
+    );
+    await tester.pump();
+    expect(find.text('2'), findsOneWidget);
+  });
 }