/* Atualização: header/footer + audit log + emails */

CREATE TABLE IF NOT EXISTS audit_logs (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NULL,
    action VARCHAR(120) NOT NULL,
    module VARCHAR(80) NULL,
    record_id INT NULL,
    description TEXT NULL,
    old_data LONGTEXT NULL,
    new_data LONGTEXT NULL,
    ip_address VARCHAR(100) NULL,
    user_agent VARCHAR(255) NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    INDEX idx_audit_user (user_id),
    INDEX idx_audit_module_record (module, record_id),
    INDEX idx_audit_created (created_at)
);

ALTER TABLE users
ADD COLUMN IF NOT EXISTS last_login_at DATETIME NULL AFTER active;

ALTER TABLE users
ADD COLUMN IF NOT EXISTS last_login_ip VARCHAR(100) NULL AFTER last_login_at;

ALTER TABLE events
ADD COLUMN IF NOT EXISTS last_notified_at DATETIME NULL AFTER updated_at;