How about a complete rewrite that is not vibe coded? I'm only half serious. You're likely to use an LLM to help develop it, but don't let it take you for a ride. LLM's really struggle with data dense and robust designs.

Have a look at https://diskprices.com/ - this is great UX because it's extremely functional, yet it has nearly no design to speak of. On a scale of data dense designs, this one would be on the extreme side, so I guess if you ask the LLM to meet you somewhere in the middle.