@trwnh hopefully related, I've been thinking about a sort of browser extension in the vein of fediact/graze that you connect an account to and it'll expose certain account details etc via an API. if elements have special attributes on the page then you can click on them and the extension will like/boost/reply/etc for you. if there isn't anything that it can hook into but it still detects activitypub or whatever then it'll pop up a bar with buttons that let you do that.
sort of a pipe dream but it's something that would certainly help things along in making it more of a social Web like you're talking about if I'm not wrong