Post History

By digging further into the details of `xdg-open`, I stumbled upon this [page](https://wiki.archlinux.org/title/Xdg-utils#xdg-open) in the Arch wiki.
There it states that `xdg-open` will delegate the task of opening a file to the handler of the Desktop Environment (DE).
In the case of Gnome, this will be `gio`.

### My Solution

The available applications for opening a directory can be listed using
```
gio mime inode/directory
```
This effectively listed vscode as the default app!
I eventually managed to overwrite this default to use Nautilus as follows
```
gio mime inode/directory org.gnome.Nautilus.desktop
```

### General Solution

I am not sure how `xdg-mime` and `gio` got disconnected.
I verified that `xdg-mime` also correctly delegates to `gio` and there seem to be no problems there (at least after the fix).
Therefore, a more general (DE-independent) fix would probably be to use
```
xdg-mime default org.gnome.Nautilus.desktop inode/directory
```
to set the default app, even if `xdg-mime query default` lists the correct result.
After all, `xdg-mime` does seem to correctly delegate to the app used by the DE.