feat(app): новый визуальный язык, верхняя навигация, портфели, создание счетов и ручные события

Тема и общие виджеты (AssetIcon, ServiceMark, HelpTip, глоссарий), верхняя панель TopNav и вкладки Аналитики вместо NavSidebar, иконки PWA. Экраны: портфели, создание брокерского счёта, ручное событие, правка инструмента, Обзор карточками по скоупам и таблица активов, пересчёт метрик с опросом /metrics/status. design-system.md обновлён.

app/lib/features/shell/nav_destinations.dart

@@ -1,18 +1,19 @@
 import 'package:flutter/material.dart';
 
-/// The three groups the sidebar buckets destinations under (Grimmory-style caps headers).
-/// Order here is display order, top to bottom.
+/// The groups destinations belong to: the main tabs, the ledger screens behind «Операции», and
+/// the system ones (Здоровье, Настройки) that sit as icons on the right of the top bar.
 enum NavGroup { overview, ledger, system }
 
-const navGroupLabels = {
-  NavGroup.overview: 'ОБЗОР',
-  NavGroup.ledger: 'ОПЕРАЦИИ',
-  NavGroup.system: 'СИСТЕМА',
-};
-
 class NavDestination {
-  const NavDestination(this.path, this.icon, this.selectedIcon, this.label, this.group,
-      {this.alsoMatches = const [], this.primary = false});
+  const NavDestination(
+    this.path,
+    this.icon,
+    this.selectedIcon,
+    this.label,
+    this.group, {
+    this.alsoMatches = const [],
+    this.primary = false,
+  });
   final String path;
   final IconData icon;
   final IconData selectedIcon;
@@ -39,28 +40,97 @@ class NavDestination {
 }
 
 const navDestinations = [
-  NavDestination('/', Icons.dashboard_outlined, Icons.dashboard, 'Обзор', NavGroup.overview,
-      primary: true),
   NavDestination(
-      '/accounts', Icons.account_balance_outlined, Icons.account_balance, 'Счета', NavGroup.overview,
-      primary: true),
+    '/',
+    Icons.dashboard_outlined,
+    Icons.dashboard,
+    'Обзор',
+    NavGroup.overview,
+    primary: true,
+  ),
+  // One entry for the phase-4 screens. They keep their own top-level routes from the
+  // contract and stay deep-linkable; `/analytics` is what the bars point at, and
+  // `alsoMatches` keeps it highlighted while you are inside any of them.
   NavDestination(
-      '/portfolio', Icons.pie_chart_outline, Icons.pie_chart, 'Портфель', NavGroup.overview,
-      primary: true),
-  // One entry for the four phase-4 screens. They keep their own top-level routes from the
-  // contract and stay deep-linkable; the hub at `/analytics` is what the bottom bar and the
-  // rail point at, and `alsoMatches` keeps it highlighted while you are inside any of them.
-  NavDestination('/analytics', Icons.insights_outlined, Icons.insights, 'Аналитика', NavGroup.overview,
-      alsoMatches: ['/income', '/rebalance', '/goals', '/tax'], primary: true),
-  NavDestination('/events', Icons.event_note_outlined, Icons.event_note, 'События', NavGroup.ledger),
-  NavDestination('/imports', Icons.upload_file_outlined, Icons.upload_file, 'Импорт', NavGroup.ledger,
-      alsoMatches: ['/instruments/pending']),
-  NavDestination('/cashflow', Icons.swap_horiz_outlined, Icons.swap_horiz, 'Потоки', NavGroup.ledger),
-  NavDestination('/categories', Icons.category_outlined, Icons.category, 'Категории', NavGroup.ledger),
+    '/analytics',
+    Icons.insights_outlined,
+    Icons.insights,
+    'Аналитика',
+    NavGroup.overview,
+    alsoMatches: ['/income', '/rebalance', '/goals', '/tax', '/portfolios'],
+    primary: true,
+  ),
   NavDestination(
-      '/transactions', Icons.receipt_long_outlined, Icons.receipt_long, 'Операции', NavGroup.ledger),
-  NavDestination('/rules', Icons.rule_folder_outlined, Icons.rule_folder, 'Правила', NavGroup.ledger),
+    '/portfolio',
+    Icons.pie_chart_outline,
+    Icons.pie_chart,
+    'Портфель',
+    NavGroup.overview,
+    primary: true,
+  ),
   NavDestination(
-      '/health', Icons.monitor_heart_outlined, Icons.monitor_heart, 'Здоровье', NavGroup.system),
-  NavDestination('/settings', Icons.settings_outlined, Icons.settings, 'Настройки', NavGroup.system),
+    '/accounts',
+    Icons.account_balance_outlined,
+    Icons.account_balance,
+    'Счета',
+    NavGroup.overview,
+    primary: true,
+  ),
+  NavDestination(
+    '/events',
+    Icons.event_note_outlined,
+    Icons.event_note,
+    'События',
+    NavGroup.ledger,
+  ),
+  NavDestination(
+    '/imports',
+    Icons.upload_file_outlined,
+    Icons.upload_file,
+    'Импорт',
+    NavGroup.ledger,
+    alsoMatches: ['/instruments/pending'],
+  ),
+  NavDestination(
+    '/cashflow',
+    Icons.swap_horiz_outlined,
+    Icons.swap_horiz,
+    'Потоки',
+    NavGroup.ledger,
+  ),
+  NavDestination(
+    '/categories',
+    Icons.category_outlined,
+    Icons.category,
+    'Категории',
+    NavGroup.ledger,
+  ),
+  NavDestination(
+    '/transactions',
+    Icons.receipt_long_outlined,
+    Icons.receipt_long,
+    'Операции',
+    NavGroup.ledger,
+  ),
+  NavDestination(
+    '/rules',
+    Icons.rule_folder_outlined,
+    Icons.rule_folder,
+    'Правила',
+    NavGroup.ledger,
+  ),
+  NavDestination(
+    '/health',
+    Icons.monitor_heart_outlined,
+    Icons.monitor_heart,
+    'Здоровье',
+    NavGroup.system,
+  ),
+  NavDestination(
+    '/settings',
+    Icons.settings_outlined,
+    Icons.settings,
+    'Настройки',
+    NavGroup.system,
+  ),
 ];