next.js

425a68af - Restructure transition events around per-template matched routes

Restructure transition events around per-template matched routes Replace the flat fromRouteTemplates/fromParams arrays with a RouterTransitionMatchedRoute shape that scopes params to their template, making the template/param join unambiguous across parallel-route slots. Updates docs and expands e2e coverage (docs pages, not-found, render stamps, test controls).