Hi Jilian, I'm amazed to see how much you do to support your daughter. You are running on love and would do anything for her, it's obvious. If people would be like you everywhere, it would be a very harmonious world for trans people with no need to hide or to fear attacks of any kind. Everyone would know and would understand. Your daughter is really lucky to have you.
The exchange of the cape for the dress melted my heart. I'm sorry that your daughter has anxiety issues, I also had them all my life. I know what it is to skip school or exiting with panic attacks but for me it was not about being trans at this time so your context is different. I still know the struggle and the consequences. I know it's hard. But you are boosting her self confidence and esteem, she can just become more affirmative and convinced of her right to be who she is, and even more, how a wonderful person she is, and more able to defend herself and trust in herself. Anxiety feeds a lot of lack of those things. But your daughter seems to enjoy be herself so much, she looks strong and happy despite all the difficulties. Combined with your care and your love, I think she will be okay and surely never forget how much you helped her.
I would like to say why she fights you sometimes, but I don't know, I always assumed that teens and parents end up like this for a while, whatever the context is. But she could certainly not blame your lack of support! I guess the best is to ask her why she is angry. It seems about your appearance but this is probably not the real answer.
If your daughter is really looking like a cis girl, it's even more wonderful for her! Everything can be easier, and she can also accept herself easier. With this advantage, her will and a mother like you, at my opinion she looks like one of the most lucky trans girls around!