export interface BrevoConfig {
    /** Brevo API key (sent in the `api-key` request header, NOT `Authorization: Bearer …`). */
    apiKey: string;
    /** Default sender email address (Brevo's `sender.email`). */
    from: string;
    /** Optional display name composed alongside `from` as `sender: { name, email }`. */
    senderName?: string;
    /** Optional BYO fetch implementation (defaults to `globalThis.fetch`). */
    fetch?: typeof fetch;
}