ISLAMABAD — U.S. envoys are expected to travel to Pakistan on Saturday in a new bid to salvage ceasefire talks with Tehran, even as Iran’s top diplomat arrived in Islamabad and ruled out direct negotiations with U.S. representatives. The latest effort to broker a deal in Islamabad comes as an indefinite ceasefire has paused most fighting, but the economic fallout is still mounting with global energy shipments disrupted by the near closure of the Strait of Hormuz. Officials have not specified when President Donald Trump’s envoys Steve Witkoff and Jared Kushner, who are expected to lead the U.S. negotiation team, are due to arrive. The White House declined to comment on Saturday. On Saturday, Iran resumed commercial flights from Tehran’s international airport for the first time since the conflict with the U.S. and Israel began about two months ago. Flights were scheduled to depart for Istanbul, Oman’s capital of Muscat and the Saudi city of Medina, according to Iran’s state-run television.…