I found myself in a similar boat (converted a personal ChatGPT sub to a Business Account shared with my partner). I ended up using Claude it write a chrome extension to just walk every chat in the side navbar and dump it to a sqlite database (when I then used for my own RAG purposes). Thanks for publishing your work.
Would you mind opening it to the public? We’d be okay making modifications for our use cases, so dumping the code would be fine.