Add Closed-Back for april-folls (#3548)

## Description:

Add Closed-Back for april-folls

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:
aotumuri
This commit is contained in:
Aotumuri
2026-04-01 13:49:25 +09:00
committed by GitHub
parent 38be51a2d6
commit 6f3da9c9e0
3 changed files with 551 additions and 0 deletions
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After

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