style: apply prettier across the tree

One-shot prettier pass so the new format:check gate starts from a clean
baseline. Formatting only — no behaviour change. Generator-owned and
vendored artifacts stay untouched via .prettierignore.

src/lib/api/__tests__/api-fetch.test.ts

@@ -315,7 +315,9 @@ describe("verb helpers", () => {
     await apiPost(
       "/api/foo",
       { a: 1 },
-      { headers: new Headers({ "Content-Type": "application/json-patch+json" }) },
+      {
+        headers: new Headers({ "Content-Type": "application/json-patch+json" }),
+      },
     );
 
     const [, init] = fetchMock.mock.calls[0] as [string, RequestInit];

src/lib/api/__tests__/read-error.test.ts

@@ -2,7 +2,11 @@ import { describe, expect, it } from "vitest";
 
 import { readError } from "../read-error";
 
-function makeResponse(body: unknown, status: number, opts?: { invalidJson?: boolean }): Response {
+function makeResponse(
+  body: unknown,
+  status: number,
+  opts?: { invalidJson?: boolean },
+): Response {
   if (opts?.invalidJson) {
     return new Response("<<not json>>", {
       status,