feat: allow admin to delete files from ListOfFiles page

[amahuli03]

Current State

Currently, there is no option to delete a file. In /listoffiles, there is only an "edit" button and a "download" button for each file.

We do have a backend endpoint for this at DELETE /v1/api/uploadFile. The view is at /server/api/views/uploadFile/views.py/UploadFileView/delete, but it is not called by the frontend currently. It allows only the uploader of the file to delete it.

Expected Behavior

• Any admin (superuser) can delete any file from the /listoffiles page.
• Shows a confirmation prompt before deletion
  • Make accidental deletion near impossible by requiring them to type "delete"
• Deleted file disappears from the list without page reload

Changes needed

Backend:

• in uploadFile/views.py/uploadFileView/delete, update the permission check to allow superusers (admin):
  if upload_file.uploaded_by != request.user and not request.user.is_superuser:

Frontend:

• Add a delete button to each FileRow alongside the existing edit and download buttons
• Add the confirmation dialog before sending the delete request
• call DELETE /api/v1/api/uploadFile with { guid: file.guid } and JWT auth header (same pattern as the existing edit handler around FileRow.tsx/FileRow/handleSave)
• On success, remove the file from the parent component's state, making it disappear without a reload
  • for reference, check out how updateFileName works
  • you'll need to create a new onDelete prop, defined in ListOfFiles and passed to FileRow.

@sue-hntr Sue is a UX designer and can weigh in on design decisions and other specifics