chore: finish frontend ESLint migration #18

Enable every plugin recommended preset and replace Biome with ESLint formatting.

Preserve API contracts and JSX whitespace; verify source, tests, builds and tooling.

src/pages/account/ui/AccountPage/position-groups.test.tsx

@@ -2,39 +2,45 @@ import { MantineProvider } from "@mantine/core";
 import { render, screen, within } from "@testing-library/react";
 import { MemoryRouter } from "react-router";
 import { describe, expect, it } from "vitest";
+
 import type { Portfolio } from "@/entities/portfolio";
+
 import { toAccountPagePositionSections } from "./AccountPage.vm";
 import { PositionSection } from "./components/PositionSection.view";
 
-const position: Portfolio["positions"][number] = {
-	account: { id: "a", name: "Основной" },
-	figi: "FIGI-SBER",
-	displayName: "Сбербанк",
-	type: "STOCK",
-	quantity: "1.25",
-	currentValue: { currency: "RUB", value: "375" },
-	averagePurchasePrice: { currency: "RUB", value: "280" },
-	absoluteReturn: { currency: "RUB", value: "25" },
-	isin: "RU0009029540",
-	ticker: "SBER",
-	logoName: null,
-};
-const second = {
-	...position,
-	account: { id: "b", name: "ИИС" },
-	quantity: "-2",
-	currentValue: null,
-	averagePurchasePrice: null,
-	absoluteReturn: null,
-};
+const position: Portfolio["positions"][number] = (/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+	{
+		absoluteReturn: { currency: "RUB", value: "25" },
+		account: { id: "a", name: "Основной" },
+		averagePurchasePrice: { currency: "RUB", value: "280" },
+		currentValue: { currency: "RUB", value: "375" },
+		displayName: "Сбербанк",
+		figi: "FIGI-SBER",
+		isin: "RU0009029540",
+		logoName: null,
+		quantity: "1.25",
+		ticker: "SBER",
+		type: "STOCK",
+	}
+/* eslint-enable unicorn/no-null */);
+const second = (/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+	{
+		...position,
+		absoluteReturn: null,
+		account: { id: "b", name: "ИИС" },
+		averagePurchasePrice: null,
+		currentValue: null,
+		quantity: "-2",
+	}
+/* eslint-enable unicorn/no-null */);
 function sections(positions: Portfolio["positions"]) {
 	return toAccountPagePositionSections({
-		lastSuccessfulAt: "2026-09-09T12:00:00Z",
-		isStale: false,
-		totalsByCurrency: [],
-		structure: { currencies: [], unvaluedCategories: [] },
 		cashBalances: [],
+		isStale: false,
+		lastSuccessfulAt: "2026-09-09T12:00:00Z",
 		positions,
+		structure: { currencies: [], unvaluedCategories: [] },
+		totalsByCurrency: [],
 	});
 }
 
@@ -72,8 +78,12 @@ describe("Positions grouped by security", () => {
 	it("uses ISIN only when FIGI is absent, never merging by name or ticker", () => {
 		expect(
 			sections([
-				{ ...position, figi: null },
-				{ ...second, figi: null },
+				(/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+					{ ...position, figi: null }
+				/* eslint-enable unicorn/no-null */),
+				(/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+					{ ...second, figi: null }
+				/* eslint-enable unicorn/no-null */),
 			])[0].groups,
 		).toHaveLength(1);
 		expect(
@@ -81,8 +91,12 @@ describe("Positions grouped by security", () => {
 		).toHaveLength(2);
 		expect(
 			sections([
-				{ ...position, figi: null, isin: null },
-				{ ...second, figi: null, isin: null },
+				(/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+					{ ...position, figi: null, isin: null }
+				/* eslint-enable unicorn/no-null */),
+				(/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+					{ ...second, figi: null, isin: null }
+				/* eslint-enable unicorn/no-null */),
 			])[0].groups,
 		).toHaveLength(2);
 	});
@@ -104,20 +118,20 @@ describe("Positions grouped by security", () => {
 			position,
 			{
 				...second,
-				currentValue: { currency: "USD", value: "1.01" },
 				averagePurchasePrice: { currency: "USD", value: "0.99" },
+				currentValue: { currency: "USD", value: "1.01" },
 			},
 		];
 		const before = structuredClone(source);
 		const [group] = sections(source)[0].groups;
 		expect(
-			group.positions.map((item) => [
+			group.positions.map(item => [
 				item.quantity,
 				item.currentValue,
 				item.averagePurchasePrice,
 			]),
 		).toEqual(
-			source.map((item) => [
+			source.map(item => [
 				item.quantity,
 				item.currentValue,
 				item.averagePurchasePrice,