Just FYI, if you just use Firefox in both OSes, you can sync the tabs, history, and extension settings. Though I’ve seen the opinion that Safari works faster, but OTOH extension developers are unhappy with Apple’s publishing/vetting process, and some devs dropped support for Safari that they provided previously.

I wonder if iOS and watchOS being macOS in miniature means that the terminal can be used on them natively, like on Android.

those little pop ups for the space and g menus

Emacs has this with the Hydra plugin, iirc. Particularly, Doom Emacs already has this feature packaged.

Zsh probably can’t do that, because zsh is involved with typing commands, not handling their output. You should look into the docs and settings for your terminal emulator — some of them do support selecting output with the keyboard. Alternatively, something like tmux might be able to handle that too.

Try Vimium if you use Firefox, Chrome, or something Chromium-based. Invoking links with ‘f’ and a couple letters is so comfortable that I now get mad when the addon doesn’t work on Mozilla’s sites (due to security concerns) or when a site has ‘links’ implemented with JS.