perf(web): форматтер чисел свода 1 и сводных проектов создаётся один раз

AURORA-1835: Cell в scaleColumns создавал Intl.NumberFormat на каждую ячейку.
Форматирование вынесено в formatSummaryAmount (summaryFormat.js) с модульным форматтером.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

web/src/pages/SvodPage/SummaryTable.jsx

@@ -5,6 +5,7 @@ import useDenomination from '../../components/common/useDenomination';
 import { blueColumn, greenColumn, orangeColumn } from '../../components/RealtimeTable/constants/columnColors';
 import { sectionCodeColor } from '../../components/RealtimeTable/constants/columnConfig';
 import { buildRowHierarchy } from '../../components/RealtimeTable/utils/rowUtils';
+import { formatSummaryAmount } from './summaryFormat';
 
 const tableSize = (rem) => rem * 16;
 const ROW_VIRTUALIZER_OPTIONS = {
@@ -68,11 +69,10 @@ const scaleColumns = (columns, divisor) => columns.map((column) => {
 		...(children ? { columns: children } : {}),
 		...(isAmount ? { Cell: ({ cell }) => {
 			const value = cell.getValue();
+			const formatted = formatSummaryAmount(value, divisor);
+			if (formatted !== null) return formatted;
 			if (value === null || value === undefined || value === '') return originalCell ? originalCell({ cell }) : '—';
-			const numeric = Number(value);
-			if (!Number.isFinite(numeric)) return originalCell ? originalCell({ cell }) : value;
-			if (numeric === 0) return '-';
-			return new Intl.NumberFormat('ru-RU', { maximumFractionDigits: 2 }).format(numeric / divisor);
+			return originalCell ? originalCell({ cell }) : value;
 		} } : {}),
 	};
 });

web/src/pages/SvodPage/summaryFormat.js

@@ -0,0 +1,10 @@
+const amountFormatter = new Intl.NumberFormat('ru-RU', { maximumFractionDigits: 2 });
+
+// Возвращает null, если значение не число: вызывающий отдаёт исходное значение.
+export const formatSummaryAmount = (value, divisor) => {
+	if (value === null || value === undefined || value === '') return null;
+	const numeric = Number(value);
+	if (!Number.isFinite(numeric)) return null;
+	if (numeric === 0) return '-';
+	return amountFormatter.format(numeric / divisor);
+};

web/src/pages/SvodPage/summaryFormat.test.js

@@ -0,0 +1,37 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+const NBSP = ' ';
+
+test('formatSummaryAmount: форматирование и делители', async () => {
+	const { formatSummaryAmount } = await import('./summaryFormat.js');
+	assert.equal(formatSummaryAmount(0, 1), '-');
+	assert.equal(formatSummaryAmount('0', 1000), '-');
+	assert.equal(formatSummaryAmount(1234.567, 1), `1${NBSP}234,57`);
+	assert.equal(formatSummaryAmount(5_000_000, 1000), `5${NBSP}000`);
+	assert.equal(formatSummaryAmount(5_000_000, 1e6), '5');
+	assert.equal(formatSummaryAmount('1500', 1), `1${NBSP}500`);
+});
+
+test('formatSummaryAmount: нечисловые значения возвращают null', async () => {
+	const { formatSummaryAmount } = await import('./summaryFormat.js');
+	for (const v of [null, undefined, '', 'abc', Number.NaN, Number.POSITIVE_INFINITY]) {
+		assert.equal(formatSummaryAmount(v, 1), null);
+	}
+});
+
+test('Intl.NumberFormat создаётся один раз на модуль', async () => {
+	const Original = Intl.NumberFormat;
+	let created = 0;
+	Intl.NumberFormat = function CountingNumberFormat(...args) {
+		created += 1;
+		return new Original(...args);
+	};
+	try {
+		const { formatSummaryAmount } = await import('./summaryFormat.js?fresh');
+		for (let i = 1; i <= 50; i += 1) formatSummaryAmount(i * 100, 1000);
+		assert.equal(created, 1);
+	} finally {
+		Intl.NumberFormat = Original;
+	}
+});