“Plus the Emperor knows that Skywalker will come to Vader, and he tells this to Vader exactly when he needs to.”
I think this is incorrect. The emporer doesn’t know Luke is there until Vader tells him he felt his presence. Then he tells him to go to endor. And he has for seen it, he is bsing Vader to make it seem like it is part of his plan.
Side note on Boba fett… wouldn’t that guy recognize Luke at Jabbas and relay to Jabba that the empire wants him bad, probably a pretty hefty price on his head.
He doesn’t know where Luke is, all he knows he is coming to visit Vader.
" – You’ve done well Lord Vader. And now I sense you wish to continue your searc hfor young Skywalker.
– Yes my Master.
– Patience my friend. In time he will seek you out. And when he does, you must bring him before me. …"
That is a good observation on Boba Fett. The question is what Jabba cares about. Prize money, or revenge. I’d bet on the latter.