Out of place button in Design Configurations

### Description

"Edit overview markdown" button is out of place when a small thumbnail is uploaded. 

<img width="1061" height="540" alt="Image" src="https://github.com/user-attachments/assets/e7fe1ffc-127f-4718-a64d-fbd8f198d708" />

### Steps to Reproduce

Create an API and add a small thubmnail image to the API

### Version

4.6.0-beta

### Environment Details (with versions)

_No response_