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/features/tbank-connection/ui/TbankConnectionSection/TbankConnectionSection.test.tsx

@@ -7,11 +7,13 @@ import {
 	waitFor,
 	within,
 } from "@testing-library/react";
-import { HttpResponse, http } from "msw";
+import { http, HttpResponse } from "msw";
 import { describe, expect, it, vi } from "vitest";
+
 import { apiQueryClient, configureAuthClient } from "@/shared/api";
 import { createTestQueryClient } from "@/test/query";
 import { server } from "@/test/server";
+
 import { tbankConnectionQueryOptions } from "../../model/connection-boundary";
 import { TbankConnectionSection } from "./TbankConnectionSection";
 
@@ -54,8 +56,8 @@ const unrelatedQueryKey = apiQueryClient.queryOptions(
 function renderSection(client: QueryClient) {
 	configureAuthClient({
 		accessToken: () => "test-token",
-		refresh: async () => true,
 		clear: vi.fn(),
+		refresh: () => Promise.resolve(true),
 	});
 	return render(
 		<MantineProvider>
@@ -69,12 +71,14 @@ function renderSection(client: QueryClient) {
 function seededClient() {
 	const client = createTestQueryClient();
 	client.setQueryData(brokerageAccountsQueryKey, [
-		{
-			id: "account-1",
-			name: "Основной счет",
-			type: "BROKERAGE",
-			openedOn: null,
-		},
+		(/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+			{
+				id: "account-1",
+				name: "Основной счет",
+				openedOn: null,
+				type: "BROKERAGE",
+			}
+		/* eslint-enable unicorn/no-null */),
 	]);
 	client.setQueryData(portfolioQueryKey, { source: "previous-connection" });
 	client.setQueryData(stockQueryKey, { source: "previous-connection" });
@@ -87,10 +91,8 @@ function seededClient() {
 describe("TbankConnectionSection", () => {
 	it("preserves cached status and a draft entered during a delayed failed refetch", async () => {
 		const status = { connected: true, connectedAt: "2026-08-14T00:00:00Z" };
-		let finishRefetch: (() => void) | undefined;
-		const response = new Promise<void>((resolve) => {
-			finishRefetch = resolve;
-		});
+
+		const { promise: response, resolve: finishRefetch } = Promise.withResolvers<void>();
 		let reads = 0;
 		server.use(
 			http.get("*/api/v1/tbank-connection", async () => {
@@ -141,7 +143,9 @@ describe("TbankConnectionSection", () => {
 				reads += 1;
 				return reads === 1
 					? HttpResponse.json({ code: "TBANK_UNAVAILABLE" }, { status: 503 })
-					: HttpResponse.json({ connected: false, connectedAt: null });
+					: HttpResponse.json((/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+							{ connected: false, connectedAt: null }
+							/* eslint-enable unicorn/no-null */));
 			}),
 		);
 		renderSection(createTestQueryClient());
@@ -238,22 +242,21 @@ describe("TbankConnectionSection", () => {
 
 	it("cancels an in-flight previous-boundary query and ignores its late response", async () => {
 		const client = seededClient();
-		let finishPrevious: ((value: { source: string }) => void) | undefined;
-		let aborted = false;
-		const previousResponse = new Promise<{ source: string }>((resolve) => {
-			finishPrevious = resolve;
-		});
+
+		let isAborted = false;
+		const { promise: previousResponse, resolve: finishPrevious } = Promise.withResolvers<{ source: string }>();
 		const previousRequest = client
-			.fetchQuery({
-				queryKey: operationsQueryKey,
+			.query({
 				queryFn: ({ signal }) => {
 					signal.addEventListener("abort", () => {
-						aborted = true;
+						isAborted = true;
 					});
 					return previousResponse;
 				},
+				queryKey: operationsQueryKey,
 			})
-			.catch(() => undefined);
+			// eslint-disable-next-line unicorn/prefer-await -- Attach the handler immediately and retain the pending promise for queue/race ordering.
+			.catch(() => {});
 		renderSection(client);
 
 		await screen.findByText("Не подключено");
@@ -262,7 +265,7 @@ describe("TbankConnectionSection", () => {
 		});
 		fireEvent.click(screen.getByRole("button", { name: "Подключить" }));
 
-		await waitFor(() => expect(aborted).toBe(true));
+		await waitFor(() => expect(isAborted).toBe(true));
 		await previousRequest;
 		finishPrevious?.({ source: "previous-connection" });
 		await Promise.resolve();
@@ -298,10 +301,8 @@ describe("TbankConnectionSection", () => {
 
 	it("keeps DELETE recovery inside the dialog and preserves cache until successful retry", async () => {
 		let deletes = 0;
-		let finishDelete: (() => void) | undefined;
-		const response = new Promise<void>((resolve) => {
-			finishDelete = resolve;
-		});
+
+		const { promise: response, resolve: finishDelete } = Promise.withResolvers<void>();
 		server.use(
 			http.get("*/api/v1/tbank-connection", () =>
 				HttpResponse.json({
@@ -327,6 +328,7 @@ describe("TbankConnectionSection", () => {
 			name: "Удалить подключение?",
 		});
 		await waitFor(() =>
+			// eslint-disable-next-line testing-library/no-node-access -- This assertion checks DOM structure, decoration or focus behavior that semantic queries cannot establish.
 			expect(dialog.contains(document.activeElement)).toBe(true),
 		);
 		const confirm = within(dialog).getByRole("button", { name: /^Удалить$/ });
@@ -340,7 +342,7 @@ describe("TbankConnectionSection", () => {
 		document.body.tabIndex = -1;
 		document.body.focus();
 		document.body.removeAttribute("tabindex");
-		expect(document.activeElement).toBe(document.body);
+		expect(document.body).toHaveFocus();
 		finishDelete?.();
 
 		expect(await within(dialog).findByRole("alert")).toHaveTextContent(