-- Verdent 账号表
CREATE TABLE IF NOT EXISTS accounts (
  id INT AUTO_INCREMENT PRIMARY KEY,
  email VARCHAR(255) NOT NULL UNIQUE,
  password VARCHAR(255) NOT NULL,
  status VARCHAR(50) DEFAULT 'active',
  created_at DATETIME NOT NULL,
  expires_at DATETIME NOT NULL,
  INDEX idx_email (email),
  INDEX idx_created_at (created_at),
  INDEX idx_expires_at (expires_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;