[BUG] audio alerts for VSC plugin Version 2.1.266

### Preflight Checklist

- [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) 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?

Audio cue doesn't play when user input is required

Platform: macOS
App: VS Code with Claude Code extension
Setting: accessibility.signals.chatUser.sound: on
Issue: Audio cue doesn't play when user input is required
Other audio: Working fine on system

### What Should Happen?

Audio cue should play when user input is required

### Error Messages/Logs

```shell

```

### Steps to Reproduce

1. Open Claude Code plugin UI
2. ask for a prompt to capture Yes or No Choice

### Claude Model

None

### Is this a regression?

Yes, this worked in a previous version

### Last Working Version

_No response_

### Claude Code Version

2.1.266

### Platform

Anthropic API

### Operating System

macOS

### Terminal/Shell

Terminal.app (macOS)

### Additional Information

_No response_

Reproduce the issue from the Claude Code plugin UI on macOS with accessibility.signals.chatUser.sound enabled, using a prompt that requests a Yes/No choice. Compare version 2.1.266 with the previous working version if available; done means the audio cue plays when user input is required without affecting other system audio.

由索引模型根据 Issue 内容生成。