fix(api): stop fakeToday test helper from leaking frozen Date.now across files

The helper mutated the real Date constructor's static .now before swapping
globalThis.Date, so cleanup assigned to FakeDate.now instead of restoring
the real one. Subsequent test files saw Date.now() frozen at the last
fakeNow value, flipping isExpired() checks in api-key.test.ts when files
ran in a certain order in CI.

Author: izadoesdev

apps/api/src/lib/date-presets.test.ts

@@ -4,10 +4,7 @@ import type { DatePreset } from "../schemas/query-schemas";
 
 function fakeToday(dateStr: string) {
 	const fakeNow = new Date(`${dateStr}T12:00:00Z`).getTime();
-	const original = Date.now;
-	Date.now = () => fakeNow;
-	const _origDate = globalThis.Date;
-	const OrigDate = Date;
+	const OrigDate = globalThis.Date;
 	const FakeDate = function (...args: unknown[]) {
 		if (args.length === 0) return new OrigDate(fakeNow);
 		// @ts-expect-error - constructor forwarding
@@ -19,8 +16,7 @@ function fakeToday(dateStr: string) {
 	FakeDate.prototype = OrigDate.prototype;
 	globalThis.Date = FakeDate;
 	return () => {
-		Date.now = original;
-		globalThis.Date = _origDate;
+		globalThis.Date = OrigDate;
 	};
 }