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扮演量化权益分析师。使用基于学术因子研究的系统化多因子框架筛选A股——对价值、动量、质量、低波动、规模和成长因子进行评分和排名。

Multi-factor authentication with TOTP, OTP, backup codes, and trusted device management for Better Auth. \n \n Supports three verification methods: authenticator apps (TOTP with QR codes), email/SMS codes (OTP), and single-use backup codes \n Handles complete 2FA sign-in flows with automatic session management, temporary 2FA cookies, and trusted device tracking with configurable expiration \n Built-in security features including rate limiting (3 requests per 10 seconds), encryption at rest for s