TD Garden workers, toward the end of a frantic day that saw two games — one basketball and one hockey — at the busy arena, worked tirelessly Sunday night on the Garden ice. There, just an hour after the Bruins wrapped up their regular season, the arena workers put down the giant “Stanley Cup Playoffs” decal on the ice. It serves as a literal and figurative reminder of how quick things move on from the regular season to the playoffs. Just a little more than an hour earlier, the Bruins were getting booed off their home ice after dropping a 4-2 decision to Ottawa, and in the process, handing the division title to Montreal. As the siren sounded at the Garden, it was settled that the Bruins would play Toronto — not Ottawa or the New York Islanders — in the first round. The Garden workers weren’t alone in turning the page in a heartbeat. The Bruins said that they wanted to win the division and lock up the No. 2 seed, but there was little talk of that in the dressing room after their latest setback. That’s probably because the Bruins are playing their worst hockey of the season at the worst possible time. The B’s limp into the playoffs riding a 2-4-2 record in their last eight games, and they look to be a far cry from the team that was setting franchise records with the hottest start to the season for any team not calling Chicago home. So it should come as no surprise that the Bruins are eager to put the regular season behind them and get into the playoffs. Any Bruins player who didn’t utter the words “turn the page” or “it’s a new season” would be in the minority Sunday night. One even used both clichés. “It’s a new season, so you turn the page and get ready for the fun part of the year,” Shawn Thornton, no stranger to playoff hockey, said. “This is what we play the 48 games this year for to get to this position. Now the fun starts.”