Real Madrid’s first offer for Kylian Mbappé arrived, in writing, on Tuesday afternoon. It did not come as a shock to anyone at Paris St.-Germain, not really. Mbappé had only a year left on his contract. Negotiations over an extension had long ago hit an impasse. It was an open secret he had eyes only for Real Madrid. Clumsily, the Spanish club had made clear it reciprocated his affection.