/**
 * Convert a storyboard `backdrop` cue into a safer image-generation prompt.
 *
 * Backdrops are normally background plates; scene HTML owns the exact text,
 * logos, charts, and UI. Keeping that contract explicit reduces unrelated
 * product-photo drift and avoids generated typography competing with overlays.
 */
export declare function augmentBackdropPrompt(cue: string): string;
