Is your feature request related to a problem? Please describe.

On my phone I use the cookbook PWA because none of the available Android apps really satisfy me. For most things I'm really happy how it works, the only annoying thing (besides an obvious lack of offline support which I don't really consider in scope for a Nextcloud web app) is the lack of a wakelock when viewing a recipe. I usually put my phone on the table while cooking and have a very low timeout for the screen lock. In my other phone usage this is not a problem and I do it for security/privacy reasons, but while cooking in my own kitchen it is a bit annoying that I constantly need to unlock it.

Describe the solution you'd like

While viewing a recipe the frontend should acquire a screen wake lock with the dedicated API: https://developer.mozilla.org/en-US/docs/Web/API/Screen_Wake_Lock_API

This is probably be really easy to implement, so I might give it a go myself if there is time for it.