Web frontend and supporting services for lance.blue

feat(lobby)!: ask an open force one question, not five master

Who pilots it - You, Invite, Fill, AI - as one split plate, where three loose buttons, a Hold and an always-open handle field used to sit on every card. Fill is matchmaking and does not exist yet, so it is disabled under the site's own coming-soon stamp; Hold is gone, because reserving a force for somebody who may never arrive is the reverse of what an open force is for.