Felix Unger and Oscar Madison had nothing on these two: Where most outsiders expected a WWE main event, President Donald Trump and Mayor-elect Zohran Mamdani staged a total love-fest Friday afternoon, and good for them — and especially good for New York. "I expect to be helping him, not hurting him, a big help because I want New York City to be great," Trump insisted; Mamdani in turn cited "shared purpose that we have in serving New Yorkers." It was all accentuate-the-positive: They both want safer streets, lower rents, more housing — though the prez admitted, "we may disagree how we get there."...