People shop in a store in Tehran on Tuesday. Despite an oil-export squeeze, Iran has plentiful internal supplies, steady trade with neighbors and only limited signs of immediate stress from state-revenue losses caused by the U.S. blockade. | West Asia News Agency / via REUTERS DUBAI – Weeks of conflict have aggravated Iran's dire economic problems, risking calamity after the war, but the Islamic Republic looks able to survive a standoff in the Persian Gulf for now, despite a U.S. blockade that has cut off energy exports. With major fighting paused by an April 8 truce, Iran is locked in a stalemate with the U.S. and Israel, with talks for a lasting ceasefire stalled while Tehran keeps the Strait of Hormuz shut and Washington blockades Iranian Gulf ports. Despite bad damage to infrastructure and industries and an oil-export squeeze, Iran has plentiful internal supplies, steady trade with neighbors and only limited signs of immediate stress from state-revenue losses caused by the blockade. If U.S.…