enhance(word-mute): ワードミュートの制限を文字数から設定項目数に (MisskeyIO#242)

packages/backend/src/server/api/endpoints/i/update.ts

@@ -236,8 +236,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			if (ps.birthday !== undefined) profileUpdates.birthday = ps.birthday;
 			if (ps.ffVisibility !== undefined) profileUpdates.ffVisibility = ps.ffVisibility;
 			if (ps.mutedWords !== undefined) {
-				// TODO: ちゃんと数える
-				const length = JSON.stringify(ps.mutedWords).length;
+				const length = ps.mutedWords.length;
 				if (length > (await this.roleService.getUserPolicies(user.id)).wordMuteLimit) {
 					throw new ApiError(meta.errors.tooManyMutedWords);
 				}