mara's steer on the issue, right as the previous commit's plan was
posted: the swarm-level term isn't a separate page, it's part of the
same pwa -- selecting an agent should show a small preview (no header,
no input) below the existing detail fields. That's the whole MVP for
this issue; the full terminal (+ sending input back to the agent) is
explicit follow-up scope.
AgentTermPage -> AgentTermPreview: drops the Panel wrapper, the
"terminal" nav badge + wouter route, and the back-link -- just the
inline preview, height-capped at 12em (@hive/shared/terminal.css's own
default is a much taller 72vh/60em, sized for a dedicated page rather
than a peek).