Github's cli tool `gh` is great for interacting with github in the terminal, e.g. opening PRs, checking workflows, PR status, etc). I do PR reviews on the site, but you can read comments in the terminal with `gh` (it does require internet access)
My day to day requires internet regardless of github, so there's no need to go for disconnected solutions, I think that's a different situation for the author. I quite like the idea of only turning the internet faucet on at select times!