[BUG] Copy-paste not working on KDE

[happyme531]

Describe the bug
As the title said.

To Reproduce
Steps to reproduce the behavior:

1. Open fsearch, right click on a file
2. Click on 'Copy'
3. Open Dolphin
4. Right click

Expected behavior
There should be a working Copy option.

Screenshots
https://github.com/cboxdoerfer/fsearch/assets/20812356/cc4cd44f-feb8-4694-804a-d0d0237e5cb2

Desktop (please complete the following information):

• OS: Manjaro 24.0.0
• How you installed FSearch: AUR
• Version: FSearch 0.3.alpha0 (AUR-devel)
• Output of localectl status:

System Locale: LANG=zh_CN.UTF-8
   VC Keymap: (unset)         
  X11 Layout: cn

Additional context
Add any other context about the problem here.