A 45-year-old woman presents with a 3-month history of intermittent right upper quadrant (RUQ) pain, typically occurring after fatty meals. The pain is colicky and can last for a few hours. There is no jaundice or fever. An ultrasound scan reveals multiple gallstones within the gallbladder but no features of acute cholecystitis or biliary duct dilatation. What is the most appropriate management?