A cooking web app 35k LoC? Wow, the author might be surprised to know that an entire OS kernel can be programmed at a fraction of that count. I can safely say that the days where we compained about JS bloat can be put aside, this is a whole new league by itself.
Sane advice: learn to program, put the AI hype/drug aside and do yourself a favor. It's an invaluable lifetime skill knowing to program from scratch and perhaps unassisted coding will be a looked-after skill in the years to come.
Vibe convert it to rust and it's even more bloat.
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I kinda wish I could look at the code, but it's not open source and the frontend sources are minified/obfuscated, but it's long and looks like it's using React and a css-in-react approach, which also generates a ton of code.