v0.6.4

Added

• Render the built-in footer's background-task badges — [N task(s) running]
  for shell processes and [N agent(s) running] for background subagents,
  between the model and project segments. Counts come from a bounded
  taskId -> { kind, status } reducer over the main-wire task.started /
  task.terminated Ops, reconciled per frame against the
  agents/main/tasks/<taskId>.json sidecars so hosts that predate the
  journaled Ops are covered too; the fresher record wins per task id. The
  counts stay separate from the throughput activeAgents / tpsAgents
  figures and only running tasks badge.

Fixed

• Keep the fleet speed style when a swarm runs down to its last live
  subagent: falling back to the solo-agent ⚡ 45 t/s · TTFT 1.2s made the
  HUD look like swarm mode had been exited. A lone live agent with a speed
  reading now reports a one-agent fleet figure (tpsTotal = tps,
  tpsAgents = 1), and while swarm mode is on the speed segment and gen
  ticker keep the fleet head count, singularized as 1 agent.