Staffers at the World Health Organization’s Syria office have alleged that their boss mismanaged millions of dollars, plied government officials with gifts — including computers, gold coins and cars — and violated the agency’s own Covid-19 guidance as the pandemic swept the country. More than 100 confidential documents, messages and other materials obtained by The Associated Press show WHO officials told investigators that the agency’s Syria representative, Dr. Akjemal Magtymova, engaged in abusive behavior, pressured WHO staff to sign contracts with high-ranking Syrian government politicians …