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- Replace hardcoded JWT secret with randomly generated key persisted to file - Replace hardcoded default password with random password shown in logs - Migrate token storage from localStorage to HttpOnly SameSite=strict cookie - Add IP-based login rate limiter (5 attempts / 15 min, 429 on lockout) - Add token_version for JWT revocation on password change - Add password strength validation (min 6 chars, 3+ unique characters) - Inject decoded user payload into request.state.user in auth middleware - Add /api/auth/me and /api/auth/logout endpoints - Narrow auth middleware exception handling (JWTError only, not all Exception) - Update updated_at timestamp on password change - Remove localStorage token management from frontend (axios, router, store) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>