[FEATURE REQUEST] Notifications

[KipCrossing]

Considering this is an alarm app, it makes a lot of sense to implement notifications when an alarm window is valid.

Some docs: https://developer.mozilla.org/en-US/docs/Web/API/Notification

@jaxernst if you think it's a feature you'd like, I can implement it when I get some spare time.

[jaxernst]

Yeah that would be awesome! Please do