6dffdf91e5
Session model:
Web — 24h sliding idle timeout enforced server-side via
user_sessions.last_activity. 30-day JWT + cookie are a
safety net; middleware is the real clock. Cookie is
re-set on active use so browsers match the sliding window.
Mobile — 365-day JWT, no idle timeout (stays persistent via Keychain
/ Keystore). Detected via User-Agent ("PedScribe" /
"Capacitor") or X-Client: mobile header.
2FA backup codes:
- 10 single-use codes generated when 2FA is first enabled
- Stored as bcrypt hashes in new users.totp_backup_codes column
- Consumed atomically on successful login fallback (when TOTP fails)
- Regenerate endpoint (POST /api/auth/2fa/backup-codes) requires
current password; invalidates prior codes
- Count endpoint (GET /api/auth/2fa/backup-codes/count) powers a
"N codes remaining" indicator on the 2FA settings card
- Modal shows codes exactly once with Copy + Download .txt actions
- Codes cleared when 2FA is disabled
New files:
src/utils/platform.js — isMobileClient() helper
Schema migration (idempotent):
ALTER TABLE users ADD COLUMN IF NOT EXISTS totp_backup_codes TEXT
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