Settings → Connections gains a Linked environments section, shown when the
server supports peer links and the session may manage access: each link with
whether it answers, its access, and a warning in its last five days, plus a
Link dialog (address, pairing code, access) and Forget. Mobile lists a
connected environment's links under Connections.

A thread a linked environment started shows "From <label>" next to its title
on web, and in the thread subtitle on mobile.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>