Since this process happens just a couple times per year, I find it reassuring to edit the file on the phone, check its contents, run it first in dry-run (the default), grep the output to my leasure, and only then run it in anger.

The widget would be overkill. My tasks were more frequent - several times weekly. The scripts were a hacked-up first step towards cron automation, and occasionally needed to be re-run. Everything is now in a neat, cron-triggered Home Assistant automation with events instead of questionable 'sleep' lines.