1 and 4 can be done with How to Create Polls
2 can be done with Discourse Voting
3 is very niche, but doable in a plugin if that is a must.
「いいね！」 4
1 and 4 can be done with How to Create Polls
2 can be done with Discourse Voting
3 is very niche, but doable in a plugin if that is a must.