Module download_run 

Structs

DownloadJob

Everything scene 4b’s run needs, owned, because it crosses a thread. It knows no game folder: the download only fills the cache.

Constants

REPORT_EVERY 🔒

A 64 KiB chunk arrives hundreds of times a second, and a post per chunk would keep the UI thread redrawing instead of responding.

Functions

run_download

Scene 4b’s run: fetch what is missing and verify it, writing nothing to the game folder, so the cache can be filled now and installed from later. A package that still fails after its retries is recorded and the rest carry on. The worker opens its own handle on the cache; the UI reopens its own afterwards.