Upload size limit should be validated client-side before starting the upload

Current Behavior

When uploading a file larger than the server's allowed limit, the upload proceeds until completion, and only then does the server reject it with an error message. This wastes bandwidth and user time, and may cause confusion if the user is not notified early.

Expected Behavior

The system should validate the file size on the client side (before upload begins) and immediately display an error message if the file exceeds the limit, preventing the upload from starting.

Steps to Reproduce

1. Go to File Manager
2. Select a file > 100MB
3. Click Upload
4. Wait for full upload → Error appears

Panel Version

1.4.0 and news

Wings Version

1.4.2and news

Games and/or Eggs Affected

anything

Docker Image

anything

Error Logs

Is there an existing issue for this?

• I have searched the existing issues before opening this issue. I understand that maintainers may close this issue without communication if I have not provided sufficient information.