P4-8: AuthController::login now verifies the CSRF token the login form
already emits (Csrf::check over session vs posted field), returning 403
before the user lookup. Closes a login-CSRF / session-fixation hole where
a forged cross-site POST could silently log a victim into an attacker's
account. Tests seed the session+body token; adds
testLoginRejectsMissingOrWrongCsrf.
P4-6: ZoneConfigController::save wraps the repository write in
try/catch(\RuntimeException) so an ownership/device mismatch is a 400
(invalid_zone) client error, not an uncaught 500. Adds
testSaveOwnershipMismatchIs400NotError with a throwing repo double.
phpunit: 88 passing (4 skipped: PDO-backed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019Xmn8KZWqiQUguEMRtn6rW
Only SameSite=Lax protected the acknowledge and zone save/delete endpoints,
even though a Csrf helper and mintable token already existed. Add
GET /api/csrf (CsrfController::token) to mint/return a per-session token,
check it (auth -> rbac -> csrf -> mutate) in EventDetailController::acknowledge
and ZoneConfigController::save/delete, and wire app.js/zone-draw.js to fetch
the token on load and send it as X-Csrf-Token on every POST.
