- A pick anywhere (graph node, member card) now steers the comms timeline
beside the task board: rows narrow to the traffic the picked agent sent or
received, the dropdown steps aside for the pick chip (label, never a raw
id), and an agent without traffic says so
- The pick governs while it stands: the dropdown's own choice yields on
landing and never resurrects stale once the pick clears; without a pick the
dropdown keeps its free per-participant browsing
- The pick key resolves once in the view (roster name -> session id, a
subagent's own id) — the one key both boards narrow by; zh/en gains the
no-comms note