Progressive Web App, Android & iOS app

[bil-ash]

Although misskey serves both a manifest and service worker, it is not a progressive web app(PWA) (at least as of version 12.108) . This is because the service worker is registered only after a user sign-in is complete and does not cache any page although almost entire site is static . The service worker is used only for push notifications.
Making it a PWA will enable easy android, iOS and windows app generation using https://www.pwabuilder.com which is not possible now as the pwabuilder crawler is not able to detect the service worker(because it acesses the site as a non signed-in user).

The admin panel can be changed to convert the given option(in pic) into two different ones-
a)Make a PWA
b)Enable push notifictions
Enabling (a) will be a prerequisite for enabling (b). At the same time. this will allow a user to generate a PWA without notifications by enabling (a) but disabling (b).

[ThatOneCalculator]

Also see #8437