/**
 * One request in, one answer out: which handler serves what.
 *
 * Everything this dispatches to lives beside it, so the router reads as a list
 * of what the page can ask for rather than as the implementation of all of it.
 * That is the whole reason it is its own file: the page grows a new question
 * every few days, and adding one should not mean opening the module that also
 * holds the thumbnailer, the child process and the board cache.
 *
 * A handler returns a `Response` rather than writing into one. The exception is
 * the live channel, which returns nothing at all: an upgraded request stops
 * being an exchange and becomes a socket the server writes to for as long as
 * the tab is open.
 */
import type { Server } from "bun";
export declare function handle(req: Request, server: Server<undefined>): Promise<Response | undefined>;