[BUG] Session sidebar status stuck on "Running" after turn completes

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Description:
A session's sidebar entry shows a "Running" status tooltip even after the assistant has finished responding and the session has been idle for 10+ minutes with no active turn, background task, scheduled wakeup, or tool call pending.

Notes: Verified from inside the session that no background bash jobs, scheduled triggers, or pending agent calls were attached to it — appears to be a UI/status-sync issue rather than an actual hung process.

What Should Happen?

Actual: Status tooltip continues to show "Running" indefinitely.

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

Start a long multi-turn Claude Code session with several tool calls (file edits, bash commands, MCP calls)
Let the assistant finish a turn normally (no errors, no background tasks left running)
Wait 10+ minutes without sending another message
Hover the session's status indicator in the sidebar
Expected: Status should show idle/not-running once the turn completes and no background work remains.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude Code v2.1.173

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_