Thanks for the suggestion. I do use interface checks in some wrapper scripts and prefer it that way instead of dialogs.
for interface in home removable-media; do
if ! snapctl is-connected $interface; then
echo "[Snap]: Interface $interface is disconnected"
fi
done
Additional thoughts: Text editors get classic confinement so they can access all text files on the system. This app is a specialized text editor. If a Markdown file on network/usb doesn’t work in this app and it works in, for example Sublime Text, users will probably use Sublime and not bother with permissions. Granting this request will level the playing field to other generalized text editors.