/**
 * Loads a remote or inline image into a PNG/JPEG-ish `data:` URL the model APIs can ingest.
 * Browsers can fetch CDN/Unsplash URLs while OpenAI’s servers often cannot —
 * inlining avoids `invalid_image_url` for hotlink‑blocked URLs.
 */
export declare function loadImageAsDataUrl(imageUrl: string): Promise<string>;
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