Desktop app: pinned session keeps flashing activity indicator with no active work

Environment

• Claude Code desktop app (macOS 15.1, arm64)
• Session with a project pinned in the sidebar

Bug

The pinned session shows a flashing/pulsing activity dot as if work is in progress, even though the session is idle — no agents running, no background tasks.

Details / what we ruled out

1. The session earlier ran a Vite dev server via the preview pane. The server was stopped (port confirmed free, preview_list empty) — the dot kept flashing.
2. The session also held an Artifact live-update watch (auto-armed on publish, re-armed on session resume). The watch was explicitly stopped (unwatch confirmed, status shows zero watches) — the dot still kept flashing.
3. /tasks shows nothing running for the session.

Expected

The activity indicator on a pinned session should only animate while the session actually has running work (agents, background tasks, servers, watches), and should clear promptly when the last one stops.

Actual

The indicator continues flashing indefinitely for an idle session, which reads as "Claude is working on something" when nothing is running. Possibly a stale task-state entry or the indicator not resubscribing to task-count changes.

Filed by Claude Code on the user's behalf.