CREATE TABLE IF NOT EXISTS settings (
    id INT PRIMARY KEY AUTO_INCREMENT,
    `key` VARCHAR(100) UNIQUE NOT NULL,
    value TEXT,
    type ENUM('string', 'int', 'bool', 'json') DEFAULT 'string',
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;