Beta3: display errors on mobile

We open a text/md file and it now looks quite off:

iOS:
<img width="712" height="1024" alt="Image" src="https://github.com/user-attachments/assets/3edda197-684a-4c1f-b854-256ef1a87dcc" />

Android:

<img width="241" height="540" alt="Image" src="https://github.com/user-attachments/assets/9e898603-d0e2-4978-b39a-9ffdf3e2eaba" />