Two related bugs in the Cookbook task lifecycle:
1. "Stop all" fired kills via .click() inside a synchronous forEach but
showed the success toast immediately after — the toast appeared before
any of the async kill requests had been sent, giving the user false
confidence the tasks were stopped.
2. The download auto-retry logic (triggered when DOWNLOAD_FAILED appears
in the task output) had no way to distinguish a network interruption
from a deliberate user stop. A download stopped via "Stop all" or the
individual Stop button could be silently restarted up to two times by
the background monitor.
Fix: persist _userStopped: true to localStorage at the moment the user
clicks Stop (individually) or Stop all. The auto-retry guard checks this
flag before relaunching the download. The flag is written BEFORE the
kill requests fire so there is no window where the monitor can race.
Fixes#1458
1d99429ba0