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/events/labels.dart

@@ -35,31 +35,47 @@ const eventStatusLabels = {
   'ignored': 'Игнорируется',
 };
 
-String eventStatusLabel(EventStatus status) => eventStatusLabels[status.value] ?? status.value;
+String eventStatusLabel(EventStatus status) =>
+    eventStatusLabels[status.value] ?? status.value;
 
 /// Icon and colour per kind, on the same principle as the transaction list: money coming
 /// in is green, money leaving is the error colour, everything structural is neutral.
-(IconData, Color) eventKindIcon(EventKind kind, ColorScheme scheme) => switch (kind) {
+(IconData, Color) eventKindIcon(EventKind kind, ColorScheme scheme) =>
+    switch (kind) {
       EventKind.buy => (Icons.add_shopping_cart, scheme.primary),
       EventKind.sell => (Icons.sell_outlined, Colors.deepPurple),
-      EventKind.dividend || EventKind.coupon || EventKind.interest => (
-          Icons.payments_outlined,
-          Colors.green,
-        ),
+      EventKind.dividend ||
+      EventKind.coupon ||
+      EventKind.interest => (Icons.payments_outlined, Colors.green),
       EventKind.taxRefund => (Icons.assignment_return_outlined, Colors.green),
-      EventKind.tax || EventKind.commission => (Icons.receipt_outlined, scheme.error),
+      EventKind.tax ||
+      EventKind.commission => (Icons.receipt_outlined, scheme.error),
       EventKind.deposit => (Icons.arrow_circle_down_outlined, Colors.green),
       EventKind.withdrawal => (Icons.arrow_circle_up_outlined, scheme.error),
-      EventKind.transferIn || EventKind.transferOut => (Icons.swap_horiz, scheme.primary),
+      EventKind.transferIn ||
+      EventKind.transferOut => (Icons.swap_horiz, scheme.primary),
       EventKind.fxExchange => (Icons.currency_exchange, Colors.amber),
-      EventKind.split || EventKind.amortization || EventKind.repayment => (
-          Icons.call_split,
-          scheme.outline,
-        ),
-      EventKind.other || EventKind.unknownDefaultOpenApi => (Icons.help_outline, scheme.outline),
+      EventKind.split ||
+      EventKind.amortization ||
+      EventKind.repayment => (Icons.call_split, scheme.outline),
+      EventKind.other ||
+      EventKind.unknownDefaultOpenApi => (Icons.help_outline, scheme.outline),
     };
 
 /// `'Покупка · SBER'`, the one-line identity of a row. Events with no instrument behind
 /// them (deposits, fees) keep just the kind.
 String eventTitle(EventKind kind, String? ticker) =>
-    ticker == null || ticker.isEmpty ? eventKindLabel(kind) : '${eventKindLabel(kind)} · $ticker';
+    ticker == null || ticker.isEmpty
+    ? eventKindLabel(kind)
+    : '${eventKindLabel(kind)} · $ticker';
+
+/// Where a ledger event came from, as a person reads it.
+const eventSourceLabels = {
+  'tinvest': 'T-Invest',
+  'report_sber': 'Отчёт Сбера',
+  'report_vtb': 'Отчёт ВТБ',
+  'csv': 'CSV',
+  'manual': 'Введено вручную',
+};
+
+String eventSourceLabel(String source) => eventSourceLabels[source] ?? source;