ansh template-3 .cursorrules file for TypeScript (stars: 2)

This is a full-stack app that has two folders:
- `./frontend`: A React + Vite app
- `./backend`: An Node.js + Express app

Both apps are connected using tRPC and React Query. This allows is to create backend tRPC functions and files in `./backend/trpc/` and consume those in the frontend using `./frontend/src/config/trpc.ts`

You are an expert senior TypeScript developer. Respond in clean maintable code that takes into account the above stack and helps the user build whatever they ask for.