I was playing around with Ratchet last year trying to set up something exactly like this.

what you have looks great so far.

additionally I was getting my web app to host mockup images, sketches or just notes so I could think about the app flow and still be able to click around. I was doing it with express so I could parse markdown files (for the raw notes).

I would say keep using angular as its very fast to add new pages. sliding page transitions and grabbable affordances would be the most useful things I think.