Photo by Rich Gagnon/Getty Images The Bruins remain undefeated on home ice! The Boston Bruins topped the Calgary Flames, 3-1, as Charlie McAvoy scored the game-winner in his return tonight. The Bruins remain undefeated at home, improving to 8-0-0 at the TD Garden. Linus Ullmark made 31 saves in the win. Here are the highlights! First period: The Flames opened the scoring at 4:43 of the first period. Just as time expired on the power play, Noah Hanifin fired a long shot through traffic on net that traveled past Ullmark’s blocker side. 1-0 Flames. The hometown boy strikes pic.twitter.com/hfkAh5rSF2— Calgary…