By Florence Tan SINGAPORE (Reuters) – Oil prices jumped 1% on Tuesday, starting the New Year higher as a Red Sea naval clash focused attention on potential Middle East supply disruptions and expectations of Chinese economic stimulus boosted the demand outlook in the world’s top crude importer. Brent crude rose $1.03, or 1.3%, to $78.07 a barrel by 0225 GMT while U.S. West Texas Intermediate crude was at $72.53 a barrel, up 88 cents, or 1.2%. The risks of the Israel-Gaza conflict morphing into a wider regional conflict rose over the weekend after U.S. helicopters repelled an attack on Sunday by…