/**
 * Minimal MIME-type lookup for preview asset endpoint.
 *
 * Avoids adding the `mime-types` dependency for a feature whose surface area
 * is "render an HTML report with sibling images / GIFs / fonts / styles".
 * Unknown extensions fall back to `application/octet-stream` — browsers will
 * sniff or download.
 */
/** Return the MIME type for an absolute or relative file path. */
export declare function mimeTypeFor(filePath: string): string;
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