please add in the Proton Mail & Calendar app the ability to setup a new alert type that runs a program and/or command instead of just offering notification or email notifications. this would be incredibly useful, for example:

on windows, it could open Teams or Zoom for meetings and interviews 5 minutes beforehand

it could also open say, Steam or another gaming platform when new sales occur on any platform, same with a web URL for a black friday sale or similar.

on Linux it could also run commands for things like, say, a timeshift backup, and then automatically updating your system when a new version comes out.

the possibilities are endless, and since the Mail & Calendar app already runs in the background to sync, and can be set to run on startup, it would be a great method for opening programs related to events.

this is already supported on Linux in Gnome's Evolution, and i would love to see Proton integrate the same feature