document how to use the KDE file picker with XDPH (#512)

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@ -119,6 +119,16 @@ systemctl --user import-environment QT_QPA_PLATFORMTHEME
If it works, add it to your config in an `exec-once`. If it works, add it to your config in an `exec-once`.
## Using the KDE file picker with XDPH
XDPH does not implement a file picker and uses the GTK one as a fallback by default (see `/usr/share/xdg-desktop-portal/hyprland-portals.conf`). If you want to use the KDE file picker but let XDPH handle everything else, create a file `~/.config/xdg-desktop-portal/hyprland-portals.conf` with the following content:
```properties
[preferred]
default=hyprland;gtk
org.freedesktop.impl.portal.FileChooser=kde
```
You can read more about this in the [xdg-desktop-portal documentation in the Arch Wiki](https://wiki.archlinux.org/title/XDG_Desktop_Portal). Note that some applications like Firefox might require additional configuration to use the KDE file picker.
## Debugging ## Debugging
If you get long app launch times, or screensharing does not work, consult the logs. If you get long app launch times, or screensharing does not work, consult the logs.