This is just a crystal clear call call fold if you don't improve hand. Many/most of your flush draws will be nutted enough to raise the flop so it will be nice to be able to have some flushes when you call the flop and 4x of hearts will help fill that role. Turn I can't see any other play but calling, again with intentions of folding on all cards that aren't a Jack, 4, or heart. You could possibly fold on the Jack of clubs as well.