City Hall is playing with fire. The Mamdani administration is rolling out bike lanes in Queens that fuming Bravest say flagrantly ignore safety concerns and put residents in danger. At a heated community board meeting Tuesday night, about 20 FDNY members packed the room to try to throw cold water on the city Department of Transportation’s protected-bike-lane plan for 31st Street in Astoria. Firefighters are worried about getting their trucks close enough to the curb to properly battle blazes in Astoria, Queens. J.C. Rice for NY Post Firefighters are taking aim at the DOT’s plans under Mayor Zohran Mamdani. Paul Martinka for NY Post The bike lanes will have the curb on one side of them and a protective concrete median on the other. A row of car parking spaces will then be next to the median, pushing firetrucks even further into the street if a blaze erupts in the area.…