feat: media silence (#13842)

* feat: media silence

* fix: lint

* feat: deny creating custom emoji reaction and using custom emoji from media silenced hosts

* chore: メディアサイレンスの説明にカスタム絵文字の話を追加

* Update locales/ja-JP.yml

Co-authored-by: Sayamame-beans <61457993+Sayamame-beans@users.noreply.github.com>

* chore: update index.d.ts

* docs(changelog): update changelog

---------

Co-authored-by: Sayamame-beans <61457993+Sayamame-beans@users.noreply.github.com>

packages/backend/src/core/NoteCreateService.ts

@@ -364,6 +364,9 @@ export class NoteCreateService implements OnApplicationShutdown {
 			mentionedUsers = data.apMentions ?? await this.extractMentionedUsers(user, combinedTokens);
 		}
 
+		// if the host is media-silenced, custom emojis are not allowed
+		if (this.utilityService.isMediaSilencedHost(meta.mediaSilencedHosts, user.host)) emojis = [];
+
 		tags = tags.filter(tag => Array.from(tag).length <= 128).splice(0, 32);
 
 		if (data.reply && (user.id !== data.reply.userId) && !mentionedUsers.some(u => u.id === data.reply!.userId)) {