TELEVISION
Tonight's Morning After
JAY LENO may or may not be the hardest-working man in show business, but he's certainly got the hardest job. After Johnny Carson's lavishly covered farewell to the Tonight show, Leno faces the impossible task of measuring up to a legend. He did seem unusually tense his first week. He lacks Carson's easygoing charisma, and he barrels through interviews as if he can't wait to get to the end of the question sheet. But his monologues are sharper than Carson's, and he has given the show a needed coat of fresh (mostly purple) paint, with hipper musical...