Hook systemMessage and statusMessage not displayed in VSCode extension

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

In the VSCode extension, hook systemMessage and statusMessage are not displayed anywhere in the UI, even when the hook runs successfully.

In CLI mode, systemMessage appears in the conversation and statusMessage appears in the spinner. But in the VSCode extension panel, neither is shown.

This makes it impossible for users to receive hook-based notifications before tool execution (e.g. before the permission confirmation dialog).

Proposed Solution

Display hook output in the VSCode extension UI, consistent with CLI mode behavior:

• systemMessage: Show as a system notification in the conversation view
• statusMessage: Show in the spinner/status area while the hook is running

This would allow use cases like displaying Japanese-language descriptions of tool actions before the English "Allow this BASH command?" confirmation dialog appears.

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Other

Use Case Example

_No response_

Additional Context

Verified that the hook itself is running correctly (confirmed via log file). The issue is only with the display of hook output in the VSCode extension UI.

Environment: Windows 11, Claude Code VSCode Extension