getOidcConfig() memoized the discovery promise even when it rejected,
so a single failed OIDC discovery (e.g. Zitadel not ready yet when the
dev server starts) permanently broke /auth/login until the process was
restarted. Clear the cached promise on rejection so it retries.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Updates the compose build context, the Dockerfile header, the package
name and the docs. The compose service and container keep the name
frontend/musify-frontend, since nginx routes to http://frontend:3000.
The source files also carry the first prettier pass, so the rename and
the reformat land together for them.