AO3-2312 admin post kudos

[tuff]

Issue

https://otwarchive.atlassian.net/browse/AO3-2312

Purpose

Lets guests and users leave kudos on admin posts.

Testing

• While logged in as a user, try to leave kudos on an admin post from that post's page. Check that the success flash message appears and your kudos is listed.
• Try it as a guest.
• Try to leave kudos multiple times. Check that the "you already left kudos" error message appears.
• Try the above steps with JS off.

Note: I found that a kudo left while logged in as a admin counts as having been left by a guest. I assume that is expected as admins are not users. Let me know in review if that's not what's desired.

[ariana-paris]

I'd like someone from front-end to okay the class names and CSS changes, but I made some comments about the tests and aside from that, it looks good to me.

[zz9pzza]

So this has lots of merge conflicts.

And now Kudo is given by a users rather than psueds.

[sarken]

The kudos button should also only be available on an individual admin post's show page, like the comment form is only available there.

[tuff]

@zz9pzza @sarken I've fixed this up and removed the kudos button from the admin posts index.

[tuff]

Without this, the JS-enabled tests fail as we land on example.com after making the admin post. I don't know why that is...is it related to this default URL value? I can't repro manually 😕

Please suggest a better fix if you know one!

[Bilka2]

It's been a while, but there is a better fix now:
In AdminPostsController#create change the redirect_to(@admin_post) to redirect_to admin_post_path(@admin_post).

Explanation:
The controller calls redirect_to on a model object (instead of a path). When you call redirect_to on a model, Rails automatically tries to convert it to a full URL, instead of a path, and when the host is set to example.com, that means that it tries to redirect to example.com.

[Bilka2]

If master is merged into this branch (which would be nice), then this test needs an update:

Suggested change

	And I follow "Default Admin Post"
	And I press "Kudos ♥"
	And I follow "Default Admin Post"
	And all emails have been delivered
	And I press "Kudos ♥"

So the email from creating the admin wont mess up the test.

[Bilka2]

Adopted at #5931