"Découvertes à proximite" modal chevron is inverted.

The chevron should point down when the modal is expanded and down when it is closed.

<img width="271" height="332" alt="Image" src="https://github.com/user-attachments/assets/853ffd50-17bc-4e85-9b18-f6192480bb65" />

<img width="263" height="195" alt="Image" src="https://github.com/user-attachments/assets/0c392de4-90dd-44b8-b01e-c2a307e54b8a" />