refactor(web/test): default svelte-query mock in vitest.setup; remove from 34 files (B3)

web/src/routes/library/albums/page.test.ts

@@ -40,11 +40,6 @@ vi.mock('$lib/api/likes', () => ({
 // AlbumCard renders LikeButton, which calls useQueryClient() to get the
 // cache for invalidation. The page test isn't wrapped in a QueryClientProvider,
 // so we stub useQueryClient with a noop client.
-vi.mock('@tanstack/svelte-query', async (orig) => {
-  const actual = (await orig()) as Record<string, unknown>;
-  return { ...actual, useQueryClient: () => ({}) };
-});
-
 import Page from './+page.svelte';
 
 describe('/library/albums', () => {