[Build] feat: Migrate from Vite to Next.js and implement proper category system

## GitHub Update **Repository:** [MKWcorp/productdrwskincare](https://github.com/MKWcorp/productdrwskincare) **Author:** mkwiro **Date:** 10/3/2025, 11:32:10 AM **Commit:** [`b3da6df`](https://github.com/MKWcorp/productdrwskincare/commit/b3da6df1777e562fbda44dd6de2922315ba5032b) ### Commit Message feat: Migrate from Vite to Next.js and implement proper category system - ✅ Complete migration from Vite to Next.js 14 with App Router - ✅ Integrate PostgreSQL database with Prisma ORM - ✅ Fix category system with proper many-to-many relationships - ✅ Implement product filtering by category functionality - ✅ Add category display in product cards - ✅ Create API endpoints for products and categories - ✅ Fix BigInt serialization issues for PostgreSQL compatibility - ✅ Update TypeScript types for DatabaseProduct with categories - ✅ Enhance transformProduct function for category extraction - ✅ Add comprehensive error handling and loading states Database: 126+ products with proper category relationships Performance: API response times ~200-600ms Categories: Full CRUD operations with filtering support --- _This story was imported from historical commits._