[Claude Code tab] Split-view voice-mode toggle plays sound cue but fails to activate mic

Summary

In Claude Desktop's Claude Code tab, the new split-view feature allows toggling voice mode, but the toggle plays the "voice starting" audio cue without actually activating the microphone. Voice input never captures.

Steps to reproduce

1. Open Claude Desktop, Claude Code tab
2. Enable split view (two sessions visible side by side)
3. Click into one of the session panes to give it focus
4. Toggle voice mode (shortcut or UI button)

Expected behavior

Voice mode activates on the focused session pane. Microphone opens. Voice input is captured and transcribed into that session's input field.

Actual behavior

The "voice mode starting" audio cue plays — but microphone never opens and voice mode does not actually engage. The sound cue fires independently of whether the toggle succeeded.

Suspected cause

The voice-toggle handler may not be scoping the action to the recently-clicked (focused) pane in split view. Toggle event fires but binds to the wrong or a null target session.

Environment

• OS: Windows 11
• Claude Code: 2.1.108
• Feature: Claude Code tab in Claude Desktop, new split-view mode