chore: add typed ESLint checks #18

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

src/shared/api/client.test.ts

@@ -86,6 +86,7 @@ describe("apiClient authentication", () => {
 			refresh: async () => true,
 			clear: vi.fn(),
 		});
+		// eslint-disable-next-line vitest/valid-expect -- Attach rejection handling before releasing the request; the assertion is awaited below.
 		const response = expect(
 			apiClient.GET("/api/v1/brokerage-accounts"),
 		).rejects.toMatchObject({ name: "AbortError" });