NASHVILLE – On the weekend in which the business of hockey supersedes the action on the ice, the Toronto Maple Leafs have stood idle (so far) while the arms race all around them reached a fever pitch. And a frightening injury may have added to the pressure on general manager Kyle Dubas to bulk up. Prior to Saturday’s 6-3 loss to the Predators in Nashville, the Maple Leafs players had been discussing the Tampa Bay Lightning’s aggressive acquisition of young 21-goal scorer Brandon Hagel out of Chicago. In the hours between morning skate and puck drop, the Florida Panthers — already the most explosive offence in the league — added the deadline’s crown offensive jewel: the Cup-chasing, 1,000-game-playing Claude Giroux, who handpicked his sunny landing spot. (Bill “All In” Zito is on a first-round-pick spending spree, having acquired the coveted Ben Chiarot out of Montreal on Wednesday.) “[Giroux] is competitive. His hockey IQ really jumps out. He’s just really smart. Sees the ice wel...