PureScript Aff & JavaScript AbortController: Propagating Cancellation
The goal is to wire PureScript’s Aff cancellation model with the browser’s AbortController so that an Aff that performs an asynchronous fetch can be aborted cleanly by a JavaScript signal, and vice‑versa. This requires that cancellation of a parent Aff propagates to all nested child Aff computations, that timers used for timeouts are cleaned up promptly, and