chore: add typed ESLint checks #18

Refs WealthLedger/main#18. Keep Biome; add no Prettier dependencies.

src/app/routes/RouteErrorBoundary/RouteErrorBoundary.test.tsx

@@ -1,5 +1,5 @@
 import { MantineProvider } from "@mantine/core";
-import { fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { fireEvent, render, screen } from "@testing-library/react";
 import { type FC, lazy, Suspense } from "react";
 import { MemoryRouter, useLocation, useNavigate } from "react-router";
 import { describe, expect, it, vi } from "vitest";
@@ -135,8 +135,6 @@ describe("RouteErrorBoundary", () => {
 		authenticated = true;
 		renderBoundary("/accounts");
 		screen.getByRole("button", { name: "go healthy" }).click();
-		await waitFor(() =>
-			expect(screen.getByText("healthy route")).toBeInTheDocument(),
-		);
+		expect(await screen.findByText("healthy route")).toBeInTheDocument();
 	});
 });