CREATE TABLE IF NOT EXISTS users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) UNIQUE,
    email VARCHAR(100) UNIQUE,
    password_hash VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB;

CREATE TABLE IF NOT EXISTS system_settings (
    setting_key VARCHAR(50) PRIMARY KEY,
    setting_value TEXT
) ENGINE=InnoDB;

INSERT IGNORE INTO system_settings (setting_key, setting_value) VALUES ('email_verification_enabled', '0');