c1df31fda5
#622 reported "I cant even paste that hash pw and granted So auth_en =false & localbypass= true But then the host still is showing login page?" — the operator turned auth off in .env and still gets bounced to /login on every page load. The flow: The auth middleware in app.py is correctly gated on AUTH_ENABLED, so the middleware itself does not install when AUTH_ENABLED=false. The SPA front-end at static/app.js wraps window.fetch and redirects to /login on ANY 401 response from any API call. So all it takes for the operator to see a login page is one route-level 401. src/auth_helpers.require_user — the shared FastAPI dependency mounted on ~50 routes (email, contacts, personal, …) — was the source. It is documented as defense-in-depth in case the middleware was bypassed unexpectedly (SSRF from a sibling service), but the implementation treated AUTH_ENABLED=false as one of those unexpected bypasses and 401'd anyway. The loopback fall-through that would have admitted the operator does not fire under docker compose / a reverse proxy because the container sees the request arriving from the bridge gateway (172.x.x.x), not 127.0.0.1. require_user now short-circuits to "" when AUTH_ENABLED=false so the explicit operator opt-out reaches the route layer too. While in the file, also mirror LOCALHOST_BYPASS=true the same way for loopback callers — the middleware already lets them through, and routes 401'ing the same caller would produce the same /login bounce. Non-loopback callers under LOCALHOST_BYPASS are still rejected, matching the middleware's _is_trusted_loopback check. Add three focused regression tests in tests/test_security_regressions.py: docker-bridge caller is admitted under AUTH_ENABLED=false, loopback caller is admitted under LOCALHOST_BYPASS=true, LAN caller under LOCALHOST_BYPASS=true is still rejected. The existing test_require_user_rejects_unauthenticated and test_require_user_accepts_loopback_when_unconfigured tests continue to pass because neither sets AUTH_ENABLED, so the AUTH_ENABLED=true default path is unchanged. Closes #622.
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