Worker unrest is on the rise at the Shanghai factory of a major supplier for Apple gadgets, with protests at times turning violent in response to draconian “COVID zero” lockdowns . Workers at the Quanta Computer plant — which makes Apple’s MacBook laptops — have been under strict lockdown for nearly two months with limited supplies as the Chinese government takes drastic measures to keep production online despite a recent COVID-19 case surge. But the fed-up employees – most of whom are low-wage earners – have reportedly started to revolt against the measures. The unrest has included violent confrontations involving…