Contacts and rooms, the scope list, discovery and ping, APC and
screenshots move out of MyMesh.cpp to headers included at its bottom,
as MyMeshBot.h and MyMeshCli.h are, so upstream merges meet less of our
code. The feature matrix gains the 4.26" in its layout tests.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
