b088cb17b8
- ServerConfigsLoader: skip validateAuthMetadata when getAuthMetadata()
rejects (404 on /auth_issuer means server uses traditional SSO, not
native Matrix OIDC/MAS - this is expected and should not log errors)
- Router: use HydrateFallback={() => null} instead of hydrateFallbackElement={null}
so react-router v7 counts it as truthy and suppresses the spurious warning
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>