Wild, I made something extremely similar a couple years ago (also inspired by Go) called Quagen (https://quagen.io). I like your use of hex and the UX better than mine. Nice job!
Wow our ideas were really similar. I read your blog post - even how we came up with the idea was similar! I too played a lot of Hearthstone, and thought of adding a new digital element to a board game. Seems like Go was a natural fit :)
My code is also up on Github. Feel free to directly take anything you like should you keep working on it! And if you ever want to brainstorm, you know how to find me.