Well first off we all know that purposefully abandoning salaah is kufr so there’s that. Secondly you are right that fortune telling, zodiac and all of that weird juju is kufr, putting faith in other than Allah(subhanahu wa ta’ala) to tell you your future there’s absolutely no question about this. Now if your friend is blatantly against doing anything Islamic you might want to have the conversation with her about what’s going on and why she’s lost faith. From there you have a few options, 1) boycott her for the sake of Allah(ta’ala), this is the sunnah BUT it might not work if you live in the west since people here get offended too easily and are stubborn. 2) educate her and encourage her to do good and be a better muslim, since she’s from a muslim family they may not practice so you might have to work hard to break down those cultural walls. If that’s the case remind her that iman is not just what’s in the heart but includes action too. Without knowing the person I can only give general tips but you should showcase what makes islam different from every other belief system and why it’s superior, just make sure you only use authentic sources cause if you base your dawah on lies and someone finds out they won’t have a positive viewpoint on islam or you. 3) don’t do anything, which I don’t recommend but you have to choose just remember that you will be held accountable for your actions, or lack thereof, as well. Whatever you do don’t berate her, call her a kaafir, make her feel bad or guilt trip her. You need to focus on the positives since she has low iman; I hope everything works out make good intentions and of course make dua to help you out!