Lionfish, the James Beard Foundation-blessed, sustainability-themed seafood spot on Delray Beach’s buzzy Atlantic Avenue, permanently closed on Saturday night after 3 1/2 years in business. In its place will rise a restaurant that needs no sugarcoating: Sugar Factory, an American brasserie chain and celebrity magnet best known for crafting cocktails and couture lollipops endorsed by The Rock, Kendall Jenner, Pitbull, Snoop Dogg, Kevin Hart and Bruno Mars.