Feature request: Sound notification for permission prompts in VSCode panel

Feature Request

When using Claude Code in the VSCode panel, permission prompts (tool approvals, questions, etc.) appear silently inline. There is no audio notification to alert the user that Claude is waiting for input.

Problem

When working across multiple windows or stepping away briefly, it's easy to miss that Claude Code is waiting for approval. VSCode's built-in accessibility.signals.notification* settings do not apply because Claude Code renders prompts inside the panel rather than using VSCode's notification API.

Proposed Solution

Add a sound/audio alert when Claude Code requires user interaction (permission prompts, questions). This could be:

1. A built-in setting in the Claude Code extension (e.g., claudeCode.notificationSound: true)
2. Integration with VSCode's accessibility signals so existing settings work
3. Using VSCode's standard notification API alongside the inline panel prompt

Environment

• VSCode on Windows 11
• Claude Code extension v2.1.109
• Panel mode