AI-Generated Stripe Checkout: 5 Problems in 50 Lines

The context I built a Lovable app in 20 minutes to see what's possible. With no technical instructions. Here's a component from the code. It's the Stripe checkout for that app. The user clicks "Upgrade", a panel opens on the right, the Stripe form is embedded inside, you pay, it's smooth. Demo perfect. So the code was generated by an AI agent. 50 lines. It works. It also has 5 problems, including 2 serious ones. And it's exactly the kind of code I see in vibecoded apps. Let's break it down toget