Residents of Tehran awoke on Monday anxious and drained by the prospect of full-scale war resuming, following tit-for-tat strikes between arch-foes Iran and Israel that marked the greatest threat to the fragile ceasefire thus far. “We don’t know if there will be a war, nor if a peace deal will last,” said Maryam, a 41-year-old accountant in Tehran’s central Valiasr Square. She described a pervasive “sense of uncertainty and confusion” after Israeli strikes on Tehran on Sunday, which came in...