/**
 * Encodes pixel data as a 16-bit grayscale PNG file.
 *
 * Pixel values are linearly normalized from their min/max range to [0, 65535].
 * Compression uses uncompressed DEFLATE stored-blocks (BTYPE=00) so no
 * compression library is required while still producing a fully valid PNG.
 *
 * @param pixels - Row-major Float32Array of pixel values (length = width × height)
 * @param width - Image width in pixels
 * @param height - Image height in pixels
 * @returns ArrayBuffer containing a valid PNG file
 */
export declare function encodeToPNG(pixels: Float32Array, width: number, height: number): ArrayBuffer;