D-045 — the setup gate is now `config.setup`, not the peer/SSH tunnel:
- setup: true -> /setup serves the wizard (the code form first when
`setup_code` is set, via the existing D-044 gate);
GET / points at the wizard; every other route -> 404.
- setup: false + no admin -> LOCKED: GET / and /setup render an "enable
setup" boilerplate; every other route -> 404; the
wizard is not claimable.
- completion -> writes `setup: false` and creates the admin.
`setup_code` is now OPTIONAL: blank => Gate.Required() false => the toggle
alone admits; set => required (reusing the unlock cookie/fingerprint/
redaction/rate-limit). The peer/tunnel gate is retired: `httpx.
SetupRequestAllowed` and `httpx.IsLoopbackIP` are deleted; the XFF/XFP
handling is kept for the client IP and the Secure/__Host- cookies + HSTS
(A6/A11/D-043). The !bootstrapped() fail-safe becomes the locked predicate,
latched at startup.
New door seams: Deps.LockedMode and SetupGate.{Required,CodeForm,Landing,
Locked}; the Gate renders three first-run pages. The startup banner states
the mode and prints the code only when required.
Tests cover the three states, the boilerplate, the code optionality and the
unlock mechanics; live-smoked end to end (locked / wizard / code form /
full bootstrap -> setup: false).
Implements D-025 (revised 2026-10-15) and D-043.
Setup gate (D-025):
- Remove the bind refusal (CheckSetupBind/ErrNonLoopbackSetup/server.IsLoopback);
Serve binds any address, so the app can listen on 0.0.0.0:8080 behind Zoraxy.
- The gate is now per request and strict (httpx.SetupRequestAllowed): a loopback
TCP peer AND no X-Forwarded-For — the direct SSH tunnel. Anything else is 404
before dispatch; an unparseable peer fails closed (AC-7/AC-10). The raw XFF is
read before ClientIP SETS it (A6).
Proxy scheme (D-043):
- httpx.RequestIsHTTPS resolves the scheme per request: direct TLS, or a trusted
proxy's X-Forwarded-Proto. The door carries it on the request context
(httpx.WithSecure) so the session cookie, its __Host- prefix, the pre-session
and ceremony cookies, and HSTS all agree (AC-13).
- Over plain http (the tunnel) cookies stay bare and non-Secure, which fixes the
bootstrap from an https:// config.example.yaml; Config.IsSecure() is removed
as now dead.
Tests: rewrite the setup-gate tests for AC-7/AC-10, add AC-13, and unit-test
SetupRequestAllowed / RequestIsHTTPS.
