How to deal with coworker who always asks you for help and throws you under the bus whenever convenient

I have this female coworker who always messages me about how to do her task, but when we are in meeting with manager or people from other team, whenever there's an issue her kneejerk reaction is telling them I was the person that worked on that. I'm not sure if she's throwing me under the bus on purpose but today on zoom meeting I called her out on it and said she is the one who wrote that part of the code not me. I might came across as catty but what else was I supposed to do, just sit there and let her tell everyone it was me when it was not? I was angry also because she literally was messaging me all day regarding her task.

Another thing I noticed although I helped her a lot but when I need her help she either is very slow to respond or goes "i need to check" or "i will ..." and then nothing happens. But if I dont help her immediately when she is in need she would ping me repeatedly or says she needs immediate help. Again not sure if she was doing that on purpose or really forgot but it really pisses me off tbh.

The thing is we are friends outside of work but she is kind of shitty to work with. I have been trying to be professional and never showed I'm angry but I am angry. How do I deal with coworker like this? It's hard because we also have lunch together daily and I don't want awkwardness or workplace hostility also everyone else including her is indian and I'm not so I'm also afraid they gang up on me

Thanks reddit for your advice I learned a lot from yall