How I Built a "Smart" AI Prompt Refiner on a $0 Budget (NEXT.js, Gemini, and a Dual-AI Router)

As a MERN stack developer, I've been fascinated by the power of AI code assistants. But I kept hitting a wall. We've all been there: you have a great idea, so you ask your AI, "Hey, build me a MERN pet store website." The response is always a useless...