BRUSSELS — The need for the EU to respond to multiple global crises means world affairs are likely to encroach on a leaders’ summit next month that was supposed to be solely a brainstorm on how to boost the bloc’s flagging industries. Discussions over February’s informal European Council agenda — the first face-to-face sit-down of the year — reveal the competing short and long-term pressures facing Brussels, as it works to cut the economy’s reliance on the U.S. and China. Pedro Lourtie, chief