Inexpensive streaming amplifier

Audiolab 6000A Play.

An all in one unit is sometimes a preferred option because it's simple to use. When everything is controlled by an app on the smart phone... well every young person is comfortable with that...no?

I helped a friend set up a Cambridge Evo 75 with Focal Chora bookshelf speakers and I liked it so much I bought one (the Cambridge) for my tv set up and to stream Qobuz. Solid and reliable. Full disclosure: I run a Cambridge 851N with my main system so I am familiar with the user interface and app. Not exactly inexpensive but decent value for money and will keep pace as speakers are upgraded. 

Why not go with a modern day receiver from Sony, Marantz, Yamaha. They all have built in streaming capability. They will all work for the tv you mentioned, and they would allow for her to expand if she wants. Add a turn table, Apple TV. Pick up a used center channel snd she can run 3-1 for tv and drop down to 2-1 for music.