[BUG] Regression: Can no longer type/queue messages while agent is running (Desktop App)

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?

Describe the bug
On the Desktop App, you previously could type in the input field while Claude was actively
running a task. The message would queue and be picked up after the current turn completed
— without interrupting the agent.

This behavior has regressed in the Desktop App. The input field is now blocked/disabled
while the agent runs. The only way to send a new message is to hit the Stop button first,
which interrupts the current operation.

Environment

• App: Claude Desktop App (macOS)

To reproduce

1. Give Claude a long-running agentic task
2. While it is actively running, attempt to type in the input field

Expected behavior
Input field accepts typing during agent run; message queues and processes after the
current turn ends. This worked previously.

Actual behavior
Input field is disabled. Must stop the agent to enter any input, interrupting the
current run.

Impact
High — breaks real-time steering of agentic workflows. This is a confirmed regression
from prior Desktop App behavior, not a missing feature.

Related issues
#1126, #50246

What Should Happen?

While Claude is actively running a task, the input field should remain
active and accept typing. Any message typed during a run should be queued
and automatically processed once the current turn completes — without
requiring the user to stop the agent first. This behavior worked correctly
in a previous version of the Desktop App and has since regressed.

Error Messages/Logs

Steps to Reproduce

start a prompt.
as it's working.
Add new prompt
It's not added to the conversation
You have to STOP a prompt for it to discover it
Then say GO or something typically to get it to move ahead

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.92

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

_No response_