It would be very helpful to show a loading indicator until a referenced PDF document is loaded and displayed. Currently the upload view is displayed, creating the impression the user should upload a file: <img width="948" height="508" alt="Image" src="https://github.com/user-attachments/assets/75ba10cd-9d14-46ba-924d-d83dfbf524e7" />
It would be very helpful to show a loading indicator until a referenced PDF document is loaded and displayed.
Currently the upload view is displayed, creating the impression the user should upload a file: