Adds CoverProvider type + capability union, getCoverProviders /
updateCoverProvider / testCoverProvider against the three new admin
endpoints, plus createCoverProvidersQuery (60s staleTime; refetches
on focus + after mutations rather than polling — settings rarely
change in operator time).
New api.patch helper added to client.ts (the existing helpers were
get/post/put/del; PATCH was missing).
New qk.coverProviders() key follows the existing tuple pattern.
api_key_set: bool replaces echoing the credential. UpdateCoverProviderPatch
uses optional fields so the operator can change just enabled, just
key, or both atomically.
Vitest covers GET path, PATCH path with body, version_bumped
response, POST /test path with empty body, ok=false error response.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
bvandeusen
39a07a280c