One Nav, Two Stacks: A Microfrontend Between Magento and Laravel Without Replatforming

A working reference implementation on two production-grade stacks (Magento 2.4 + Laravel 11), with the host integration shape shown below and a server-rendered nav skeleton shipped on day one - not retrofitted after GSC panic. TL;DR Mid-market ecommerce rarely lives on one stack. The industry answer - "replatform everything onto one stack" - is a $100-500k, 6-12 month project most of them cannot afford. I shipped a smaller answer on a real client stack: a 15-20 kb Preact microfrontend that mount