A similar alternative to Pairdrop with a chat UI: https://drop.lol/

Yes you can achieve this with Pocket or Wallabag, a FOSS alternative.

Wallabag also have an automatic tag feature that can add tag based on the URL, so it would be possible to make different reading lists as you suggested: https://doc.wallabag.org/en/user/configuration/tagging_rules.html

I use an old standalone alarm clock, that I put on the other side of the room. So I have to get up to turn it off.