Claude.ai's MCP OAuth client only sends the RFC 8707 `resource` param
when it has Protected Resource Metadata (PRM) to learn the resource
identifier from. Without it, nas-auth's /authorize rejected the request
with 'resource 必填'.
Adds /.well-known/oauth-protected-resource (RFC 9728) that returns the
resource URL + AS URL + supported scopes. ResourceUrl is configurable
via Mcp__OAuthDiscovery__ResourceUrl, falling back to request authority
when unset (works in local dev).
zhengchen.tao
37082e165d