Unhandled node type: string in Bash tool confirmation dialog

Description

When Claude Code displays the permission confirmation dialog for a Bash tool call, the message "Unhandled node type: string" appears in the dialog UI alongside the normal Yes/No prompt.

Steps to Reproduce

1. Run Claude Code with a permission mode that prompts for Bash tool approval
2. Have Claude issue a Bash tool call with a multi-line shell command containing embedded variables and a plain-text description
3. Observe the confirmation dialog

Expected Behavior

The confirmation dialog renders cleanly with no error messages.

Actual Behavior

The dialog shows "Unhandled node type: string" above the Yes/No prompt.

Environment

• Platform: Windows 11 Enterprise (WSL2 / Git Bash)
• Model: claude-sonnet-4-6
• Claude Code version: latest