Kyle Pope ab84c7bc53 Fix review findings: transaction atomicity, perf, and UI polish
Backend fixes:
- session.py: record_failed/successful_login use flush() not commit()
  — callers own transaction boundary (BUG-2 atomicity fix)
- auth.py: Add explicit commits after record_failed_login where callers
  raise immediately; add commit before TOTP mfa_token return path
- passkeys.py: JOIN credential+user lookup in login/complete (W-1 perf)
- passkeys.py: Move mfa_enforce_pending clear before main commit (S-2)
- passkeys.py: Add Path(ge=1, le=2147483647) on DELETE endpoint (BUG-3)
- auth.py: Switch has_passkeys from COUNT to EXISTS with LIMIT 1 (W-2)
- passkey.py: Add single-worker nonce cache comment (H-1)

Frontend fixes:
- PasskeySection: emerald→green badge colors (W-3 palette)
- PasskeySection: text-[11px]/text-[10px]→text-xs (W-4 a11y minimum)
- PasskeySection: Scope deleteMutation.isPending to per-item (W-5)
- nginx.conf: Permissions-Policy publickey-credentials use (self) (H-2)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-17 22:59:59 +08:00
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