feat(web): useSearch infinite query + useDebouncedValue + MSW search handler

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/src/api/queries.search.test.tsx

@@ -0,0 +1,25 @@
+import { expect, test } from "vitest";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+import { renderHook, waitFor } from "@testing-library/react";
+import { useSearch } from "./queries";
+
+function wrapper({ children }: { children: React.ReactNode }) {
+  const qc = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+  return <QueryClientProvider client={qc}>{children}</QueryClientProvider>;
+}
+
+test("useSearch fetches a page and reports more pages available", async () => {
+  const { result } = renderHook(() => useSearch("bronze", null), { wrapper });
+
+  await waitFor(() => expect(result.current.data).toBeDefined());
+
+  const first = result.current.data!.pages[0];
+  expect(first.hits[0].object_name).toBe("Bronze figurine");
+  expect(first.estimated_total).toBe(25);
+  expect(result.current.hasNextPage).toBe(true);
+});
+
+test("useSearch is disabled for an empty query", () => {
+  const { result } = renderHook(() => useSearch("   ", null), { wrapper });
+  expect(result.current.fetchStatus).toBe("idle");
+});