Major features: - feat(auth): add TOTP (2FA) support for enhanced security - feat(auth): add password reset functionality - feat(openai): improve rate limit handling with reset time tracking - feat(subscription): add expiry notification service - fix(urlvalidator): remove trailing slash from validated URLs - docs: update demo site domain Resolved conflicts: - deploy/docker-compose.yml: added TOTP_ENCRYPTION_KEY config - setting_service.go: keep TianShuAPI site name while adding new features Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>