What really happens after you hit enter on that AI prompt? WSJ’s Joanna Stern heads inside a data center to trace the journey and then grills up some steaks to show just how much energy it takes to make an AI image and video. Photo: David HallIt seems like a marvel of financial engineering: Meta Platforms META 3.16%increase; green up pointing triangle is building a $27 billion data center in Louisiana, financed with debt, and neither the data center nor the debt will be on its own balance sheet....