Best way for offline development

What is the correct way to use locally hosted web IDE with locally hosted modules

I just have an Apache server and I have the ide in localhost/ide and the app loader in /apps. Web Bluetooth works fine for me - there's an exception in the rules about it needing HTTPS that allows it to work fine when running from localhost. If you access the same server with http://yourmachine.local/foo then it won't work :)

Can I somehow install a complete app to the emulator without installing all files by hand?

Not yet - in theory the app store could send all the commands it'd send to a real Bangle over to the emulator, but I haven't done that yet. In a way it'd be an interesting way to even test the complete app store without a real device