Maybe just me, but I have given up on flow state and my solution is to run 2 or 3 projects concurrently and switch between them. I use virtual desktops. work on one, give an assignment to my AI, switch to the next and cycle through them all day long.

This belongs as a scene in the movie Brazil or something. (I do mostly the same thing)

I'm literally doing the same.

Feels wrong but it's the closest I got.