Review caught the encrypted TOTP secret riding in the login/verify response body:
issueSession receives a SELECT * user row and only destructured out password_hash, so
totp_secret_enc (and the internal replay counter totp_last_step) leaked. Encrypted, so
not catastrophic, but it regresses the API work's "secrets never in responses" rule.
Strip both in issueSession (covers /login and /totp/verify); add an assertion that a
verify response carries no totp_secret_enc.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Unit: the mfa_pending BITE (db-injected so removing the rejection goes red), lockout, replay,
recovery-hash, decrypt-null graceful. Integration: enrollment, login->mfa_required, route-level
bite, recovery single-use, API-token bypass, verify lockout. Key-rotation: enroll under key A,
reboot under key B -> recovery still works, TOTP fails cleanly (no 500).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
