Cross-Tab State Synchronization Architecture

Synchronize state across browser tabs using the Broadcast Channel API or LocalStorage 'storage' events integrated with a Pinia store.

For a seamless user experience, a 'Logout' or 'Cart Update' in Tab A should reflect in Tab B. The architecture involves a 'Sync Middleware' in Pinia. When the state changes, the middleware broadcasts the change. Other tabs listen and apply the delta to their local state. This must be handled carefully to avoid 'infinite loop' updates.