Sourceforge has stopped distributing adware installers again since they changed ownership a few years ago.

IIRC you have to have the app installed on your phone and be in the same network, but it’s been a while.

I did use franz at some point but eventually switched to ferdium, which doesn’t require an account. That being said I haven’t used either for a while now.

• For your first point you’d probably want to investigate why your system doesn’t suspend or what exactly is going on. You could check logind.conf, specifically the HandleLidSwitch* keys. Otherwise, your lid switch should have a corresponding /dev/input/ event that you could maybe listen to or something.

• I can’t offer much input on your second point. I think unplugging the audio jack should probably trigger a udev event that you could write a rule for. No idea about wireplumber though.

I’m pretty sure Solus is a Linux based OS, at least according to Wikipedia:

Solus (previously known as Evolve OS) is an independently developed operating system for the x86-64 architecture based on the Linux kernel and a choice of Budgie, GNOME, MATE or KDE Plasma as the desktop environment.

There’s also Ctrl+delete which deletes the word after the cursor.