A 28-year-old woman is admitted to the burn unit on post-injury day 3 with a 35% TBSA deep partial-thickness burn sustained in a cooking accident. She has completed initial resuscitation (urine output now 0.5–1 mL/kg/hr), and vital signs are stable. On examination, the burned areas are blistered with areas of charred, leathery eschar. She has no signs of respiratory distress. What is the most appropriate next step in management?