I don’t know how to help my daughter with body issues.

My daughter is, in my opinion, a perfect weight. But she frequently starts crying about how fat she is. If I tell her I disagree, she shouts that I’m wrong and lying to her. If I point out that nothing I say is going to make a difference because the problem is that she doesn’t believe it herself, she shouts at me for not helping. I tried talking to her about finding the parts of herself she likes, I tried talking to her about changing her thoughts, about taking her ugly thoughts and trying to at least make them neutral…and she yells at me. I feel like she wants me to solve this for her with a magic wand, and there isn’t one unless she’s willing to put in some work. I don’t know what to do next.