next.js

7bce97d6 - [experiment] Add useOffline hook to expose offline state to userland (#92012)

[experiment] Add useOffline hook to expose offline state to userland (#92012) **Previous:** 1. https://github.com/vercel/next.js/pull/92011 **Current:** 2. (this PR) --- Adds a `useOffline()` hook exported from `next/navigation` that returns `true` when the app is offline. The state is owned by a provider component rendered in the app router, using `useState` + `useOptimistic` so the value can update even during blocked transitions (e.g., a navigation that's waiting for connectivity). Gated behind `experimental.useOffline`.