The U.S. Supreme Court handed a surprising victory to transgender youth Tuesday after declining to review an appeal from a central Indiana public school district over bathroom rights for trans students. By refusing to take up the case, the nation’s top court left in place a lower court ruling requiring the district to treat transgender students equally. The case involves a trans teen, identified in court papers as A.C., who attended a middle school in Martinsville, about 30 miles southwest of Indianapolis. The 2021 lawsuit — filed by the American Civil Liberties Union of Indiana on behalf of A…