Mayor Zohran Mamdani pushed his vague “Department of Community Safety” again on Tuesday after the NYPD’s recent shooting of a mentally ill Queens man – but couldn’t say how the newfangled agency would’ve responded. The cops’ chaotic confrontation with Jabez Chakraborty — a schizophrenic 22-year-old whom NYPD officers shot and injured Jan. 26 after he allegedly waved a knife at them — only highlighted the urgent need for a different mental health response system, Hizzoner argued.