- Extract tryAutoRedirectToIdp() on the login page so onMount's redirect
guard and the post-setup flow share one check instead of drifting.
- Fix a real bug: 304 Not Modified responses carry no Content-Type, so
is_html misclassified them and attached the strict headerless CSP,
which browsers merge into the cached 200's effective headers and
defeat the SPA's hash-based CSP on revalidated repeat visits.
- Add Cache-Control: no-store on the SPA shell to opt out of bfcache,
preventing a pre-deploy shell (stale inline hydration script + CSP
hash) from being resurrected byte-for-byte across the OIDC redirect's
full-page navigations.
- Add a manual, human-run SSO-only script/env (ports 8090/1081) since
the automated oidc.hurl suite keeps password login enabled and never
exercises the auto-redirect guard.
Edouard Vanbelle