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" });

src/shared/api/client.ts

@@ -2,10 +2,15 @@ import createClient from "openapi-fetch";
 import createQueryClient from "openapi-react-query";
 
 import type { paths } from "./generated/schema";
+import { apiErrorCode } from "./problem-details";
 
 const HTTP_UNAUTHORIZED = 401;
 
-const apiBaseUrl = import.meta.env.VITE_API_BASE_URL ?? "http://localhost:3000";
+const configuredBaseUrl: unknown = import.meta.env.VITE_API_BASE_URL;
+const apiBaseUrl =
+	typeof configuredBaseUrl === "string"
+		? configuredBaseUrl
+		: "http://localhost:3000";
 
 type AuthHandlers = {
 	generation?: () => number;
@@ -105,12 +110,12 @@ async function fetchCurrent(
 		response.status !== HTTP_UNAUTHORIZED ||
 		isAuthRequest ||
 		!auth ||
-		(
+		apiErrorCode(
 			await response
 				.clone()
 				.json()
-				.catch(() => null)
-		)?.code !== "UNAUTHORIZED"
+				.catch(() => null),
+		) !== "UNAUTHORIZED"
 	)
 		return response;
 	if (!isCurrent()) throw new DOMException("Session changed", "AbortError");