test(zoo-gateway): mock cached-token + clear-token auth helpers

The downstream stack (settings-ui) calls getCachedZooCodeToken and
clearZooCodeToken from the auth handler. CI on stacked PRs merges base
into head so this spec runs against the cached-token-aware handler;
expand the auth module mock so the auth guard test exercises the real
throw path instead of vitest's missing-mock-export error.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: James Mtendamema

src/api/providers/__tests__/zoo-gateway.spec.ts

@@ -44,6 +44,8 @@ vitest.mock("../fetchers/modelCache", () => ({
 
 vitest.mock("../../../services/zoo-code-auth", () => ({
 	getZooCodeBaseUrl: vitest.fn(() => "https://www.zoocode.dev"),
+	getCachedZooCodeToken: vitest.fn(() => undefined),
+	clearZooCodeToken: vitest.fn(async () => undefined),
 }))
 
 vitest.mock("../../transform/caching/vercel-ai-gateway", () => ({