A guest was timing out with nothing ever shown on the host. Without a
device to look at, this makes the next test say where it stops, and fixes
what was found on the way.
- The host's Sharing panel shows links received and join requests read, which
tells "nobody reached this phone" from "reached it and not understood".
- The guest says when its link is up and it is waiting for an answer.
- A request waiting shows on the host's top bar ("Sharing . 1 waiting"), and
the Sharing panel steps aside while one is up so two dialogs never stack.
- Join is a top-bar action on a sheet already under way; it was only offered
on an empty one.
- LanTransport: a host being cleaned up no longer unregisters the
advertisement or clears the address of a newer host started in its place.
Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01CBG7URddsUZjQ6KE1Kqf6G
