Bug: TypeError: createContext is not a function with Next.js 14.x and React 18.2.0

### Describe the bug and the steps to reproduce it

When using @coinbase/onchainkit@0.38.13 with Next.js 14.x and React 18.2.0, I get the following error on startup:

TypeError: (0 , react__WEBPACK_IMPORTED_MODULE_1__.createContext) is not a function
at .../node_modules/@coinbase/onchainkit/dist/nft/components/NFTProvider.js

This happens even in a minimal, clean Next.js app.

**Steps to reproduce:**
1. Create a new Next.js app:
npx create-next-app@latest clean-test
2. cd clean-test
3. Install dependencies:
npm install react@18.2.0 react-dom@18.2.0 @coinbase/onchainkit@0.38.13
4. Add a minimal page that imports and uses NFTMintCard from OnchainKit.
5. Run `npm run dev` and visit http://localhost:3000
6. The error appears and the app fails to render.

### What's the expected behavior?

The app should start and render the NFTMintCard component without any errors.

### What version of the libraries are you using?

- OnchainKit: 0.38.13
- Next.js: 14.2.3
- React: 18.2.0
- react-dom: 18.2.0
- Node: (your node version, e.g. v20.x.x)
- OS: macOS (Darwin 24.4.0)

Reproduce the failure in a minimal Next.js app using the listed React, Next.js, and OnchainKit versions, then inspect node_modules/@coinbase/onchainkit/dist/nft/components/NFTProvider.js and the NFTMintCard entry point. Done means the clean app starts with npm run dev and renders NFTMintCard without the createContext TypeError.

Written by the indexing model from the issue text.