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/app/ui/AppBreadcrumbs/BreadcrumbTrail.tsx

@@ -1,11 +1,13 @@
-import { Breadcrumbs } from "@mantine/core";
 import type { FC } from "react";
+
+import { Breadcrumbs } from "@mantine/core";
 import { useTranslation } from "react-i18next";
 import { Link } from "react-router";
+
 import classes from "./AppBreadcrumbs.module.css";
 
-type Crumb = { label: string; to?: string };
 type BreadcrumbTrailProps = { items: Crumb[] };
+type Crumb = { label: string; to?: string };
 
 const BreadcrumbTrail: FC<BreadcrumbTrailProps> = (props) => {
 	const { items } = props;
@@ -18,16 +20,18 @@ const BreadcrumbTrail: FC<BreadcrumbTrailProps> = (props) => {
 			data-depth={items.length}
 			separator={<span aria-hidden="true">→</span>}
 		>
-			{items.map((item) =>
-				item.to ? (
-					<Link className={classes.link} key={item.to} to={item.to}>
-						{item.label}
-					</Link>
-				) : (
-					<span aria-current="page" key={item.label}>
-						{item.label}
-					</span>
-				),
+			{items.map(item =>
+				item.to
+					? (
+							<Link className={classes.link} key={item.to} to={item.to}>
+								{item.label}
+							</Link>
+						)
+					: (
+							<span aria-current="page" key={item.label}>
+								{item.label}
+							</span>
+						),
 			)}
 		</Breadcrumbs>
 	);