Nice job. I have no point of comparison (having never actually used it) - but wasn't this one of the use-cases for Google's NotebookLM as well?

Feedback:

Many times when I'm reading a paper on arxiv - I find myself needing to download the sourced papers cited in the original. Factoring in the cost/time needed to do this kind of deep dive, it might be worth having a "Deep Research" button that tries to pull in the related sources and integrate them into the webpage as well.