feat(web): add API client modules for Lidarr, requests, admin

T13 of the M5a Lidarr plan. Three new client modules wrap api.get/post/put/del
helpers and the existing TanStack Query qk namespace:

  lidarr.ts   - searchLidarr() + createLidarrSearchQuery()
  requests.ts - createRequest, listMyRequests, getRequest, cancelRequest;
                createMyRequestsQuery(); cancel goes through apiFetch
                directly because the backend returns the cancelled row body
                (api.del's return type is fixed to null).
  admin.ts    - getLidarrConfig, putLidarrConfig, testLidarrConnection,
                listQualityProfiles, listRootFolders, listAdminRequests,
                approveRequest, rejectRequest; query factories for each
                read; quality profiles + root folders take an enabled prop
                so the call site decides when Lidarr is configured.

Shared LidarrRequestStatus / LidarrRequestKind enums and request/config/
search-result shapes added to types.ts. Per-module helpers (CreateRequestParams)
stay in their module files. testLidarrConnection returns a discriminated union
({ok:true,version} | {ok:false,error}) and never throws on ok:false so the
SPA can render either branch.

qk extended with lidarrSearch, myRequests, lidarrConfig,
lidarrQualityProfiles, lidarrRootFolders, adminRequests.

Tests mirror likes.test.ts (vi.mock('./client')) and cover URL construction,
query-param encoding, body shapes, the not-ok testLidarrConnection branch,
and qk additions. 32 new tests, 217 total passing.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/src/lib/api/lidarr.ts

@@ -0,0 +1,28 @@
+import { createQuery } from '@tanstack/svelte-query';
+import { api } from './client';
+import { qk } from './queries';
+import type { LidarrSearchResult, LidarrRequestKind } from './types';
+
+// Search-only. Admin-side Lidarr config + connection probing lives in admin.ts.
+
+// searchLidarr proxies the user-facing Lidarr search endpoint. URLSearchParams
+// handles encoding (spaces, quotes, ampersands) so callers can pass q raw.
+export async function searchLidarr(
+  q: string,
+  kind: LidarrRequestKind
+): Promise<LidarrSearchResult[]> {
+  const params = new URLSearchParams({ q, kind });
+  return api.get<LidarrSearchResult[]>(`/api/lidarr/search?${params.toString()}`);
+}
+
+// staleTime mirrors the spec §11 60s server-side LRU cache: re-issuing the
+// same query within a minute hits cache on the server, so there's no point
+// in marking it stale client-side any sooner.
+export function createLidarrSearchQuery(q: string, kind: LidarrRequestKind) {
+  return createQuery({
+    queryKey: qk.lidarrSearch(q, kind),
+    queryFn: () => searchLidarr(q, kind),
+    enabled: q.length > 0,
+    staleTime: 60_000
+  });
+}