CREATE TABLE IF NOT EXISTS sms_templates (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(200) NOT NULL,
    body TEXT NOT NULL,
    is_active TINYINT(1) NOT NULL DEFAULT 1,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    KEY sms_templates_active_name_idx (is_active, name)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;