Proposed changes

This PR fixes the issue where missing filenames were default to a .jpg extension. It now attempts to get the filename from the storage path, and if that's not possible, it falls back to using the file extension based on the MIME type. This ensures that files are named correctly with the appropriate extension.

Issue(s)

closes #6100

How to test or reproduce

Send an mp4 video and observe the filename shown during upload

Screenshots

Before:
After:

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments

N/A