The solution is emacs. I know you’ve got a lot invested in vim already. You can get instant LaTeX rendering with AUCTeX, view the pdf in emacs with pdf-tools, which can be used with something like org-ref (there are many bibliography packages) to query a db with the DOI of the pdf. (Try saying that two times fast). This EmacsConf talk should give you a taste of what I mean:

https://emacsconf.org/2021/talks/research/

Your old post with instantly rendering latex snippets actually inspired me to start using vim/LaTeX. This opened up a whole new world for me. I started programming, got back into my engineering degree, started using emacs/org-mode and have nearly finished the degree. Thank you, from the bottom of my heart. I don’t know what I’d be doing if I hadn’t seen your post. It revealed a way of using computers that I had never seen before.