The Nous dashboard OAuth login rejected any http:// redirect_uri whose
host was not localhost/127.0.0.1, surfacing "redirect_uri may only use
http:// for localhost/127.0.0.1" on the login screen. This broke
self-hosted dashboards reached over plain HTTP — LAN IPs, internal
hostnames, and reverse proxies that terminate TLS upstream.
The Portal-side check (agent-redirect-uri.ts) is authoritative on which
redirect_uris are permitted; this client-side _validate_redirect_uri is
only a fast-fail for obvious operator error and should not second-guess
valid http:// deployments.
Fix: drop the localhost-only branch on the http scheme. Validation now
enforces only that the scheme is http(s) and the path ends with
/auth/callback. Updated the docstring to explain the relaxed contract,
and replaced test_rejects_http_with_non_localhost (which pinned the old
behavior) with test_allows_http_with_arbitrary_host covering a Fly
hostname, a LAN IP, and an internal hostname.