/**
 * Fetches products added to cart as a record of id and timestamp.
 * Keys use the format product_id::variant_id when a variant is present,
 * or plain product_id when no variant exists.
 *
 * Reads from localStorage key "FS_ANALYTICS_products_added_to_cart", which is
 * written by no-code-recommendations' addProductToCartTimestamps utility.
 *
 * @returns {Record<string, number>} A map of product keys to their timestamps.
 */
export default function getCartProductsTimestamps(): Record<string, number>;