FluffyChat is just *so* much better than Nheko, it makes no sense to
keep using the latter. FluffyChat is:

 1. faster (starts and syncs faster)
 2. prettier (font scaling works and everything is sharp)
 3. more compatible (1:1 voice calls supposedly, 1:1 chats certainly
    work better)

It's just unfortunately not packaged *at all*. It's written in Dart
and Flutter, and neither are anywhere closed to being packaged in
Debian. Apart from Element, it's the only client that does 1:1
calling, so it's a pretty good alternative, as it doesn't use
Electron, as far as I can tell. At least it looks better than Signal
Desktop.