Freeze when trying to Copy file name in file browser (Linux only)

[DmitryArefiev]

Issue type

Crash or freeze

Description with steps to reproduce

1. Create score
2. Save
3. In browser window, try to copy selected text

The same with Save As dialog

Supporting files, videos and screenshots

Screencast.from.2025-09-03.17-00-31.webm

What is the latest version of MuseScore Studio where this issue is present?

4.7.0-252460312 (or 4.6)

Regression

Yes, this works in the latest released version and is broken in the nightly builds

Operating system

LinuxUbuntu24.04.3 LTS

Additional context

No response

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible