n private and mixed-visibility projects, the access token attached to image and file URLs expires after a default or configured validity window. When a reader keeps an article open longer than that window, downloads can fail silently, with no indication of why, until the page is manually reloaded.

Automatically refresh the drive-asset access token in the background while an article remains open, or surface an in-page notice when the current token is nearing expiry, prompting a refresh before the reader attempts a download.

Benefit: Readers can reliably download images and files from articles they’ve had open for a while, without an unexplained failure interrupting a normal reading session.