mobile display is square

using a mobile phone (android in my case) results in a square display (no problem when accessing RC directly)
mail_roudcube v1.2.2
NC 31.0.12

<img width="500" height="784" alt="Image" src="https://github.com/user-attachments/assets/83d8d42d-ae20-431b-afd8-7c10cb58b220" />