import type { ClientToolHandler } from '../../core/tool-dispatcher.js';

/** Briefly flashes the page background — proves the client tool relay round-trip visibly. */
export const flashPage: ClientToolHandler = async () => {
	const original = document.body.style.transition;
	document.body.style.transition = 'background-color 150ms ease';
	document.body.style.backgroundColor = '#fef08a';
	await new Promise((resolve) => setTimeout(resolve, 300));
	document.body.style.backgroundColor = '';
	document.body.style.transition = original;
	return { flashed: true };
};