Exported World via Launcher's World Export option is in invalid format

The world exported via launcher's World export option is invalid/broken.

<img width="1090" height="549" alt="Image" src="https://github.com/user-attachments/assets/7d4dd5e3-62cf-45c3-89d1-edb6e1de6e5a" />

<img width="369" height="164" alt="Image" src="https://github.com/user-attachments/assets/d321fa60-e7ff-4b32-b668-29300dc74d6f" />