For more than an hour in Los Angeles, this World Cup group B clash drifted without rhythm. Switzerland had the ball, Bosnia-Herzegovina had the threat on the break, and neither side looked capable of landing a decisive punch. Then Murat Yakin turned to his bench and the tie flipped on its head. Johan Manzambi, just 20 years old and barely settled into the game, detonated the contest with a thunderous volley only 166 seconds after coming on. It was the spark Switzerland had been searching for, the moment that cracked open a stubborn match and set the tone for a 4-1 win…