I agree with everyone that you need to simply talk about this with her.
However, I will ask this: Is it combat she's interested in, or simply
engaging with the system?
One of the guys in my group jokes about he hates "dinner theater". That is, the typical (and stupid) "role"/"roll" dichotomy in traditional RPGs where any scene that does not involve combat is one where we all totally ignore the rules and just free-form play-act. He calls that "dinner theater", and he hates it. So, he avoids it at all costs and just likes to start fights. Because fights let him
play the game instead of talking at length in funny accents.
I.e., maybe she hates hanging out in the village because, as is common, that's the part of the game where people yak-yak-yak, haggle over the cost of barding, etc. You know, the boring stuff where no one rolls any dice.
So, I would find out if it's that she loves combat, or that she hates free-form play-acting. Given that she has no interest in min-maxing or, it seems, tactics, I have to wonder if this is the issue. She likes combat, because combat is where the system is getting used, and her input is getting validated.
If so, I would try throwing some skill challenges her way, or even try some RPGs that have story-focused mechanics, e.g.,
The Shadow of Yesterday, Burning Wheel, Hero's Banner, etc.
Or, if she just loves the combat, let her love it and don't force her to participate in aspects of the game she dislikes.