From a pandemic to an internal scandal on top of supply disruptions causing mass temporary layoffs, Lana Payne already has seen Canada’s largest private sector union through a series of trials. But the newly elected — and first female — president of Unifor isn’t settling down. Supply issues remain a concern. The scandal that prompted former Unifor president Jerry Dias to step down is still a fresh wound. And the union aims to ensure Canada and Canadian autoworkers are central to the electric-vehicle future. Next year, Unifor and its U.S. counterpart, the United Auto Workers, will negotiate cru…