Pin Context (@) Feature Not Working in Amazon Q VS Code Extension

## Problem

The pin context (@) feature in Amazon Q VS Code extension is not functioning properly. When attempting to use @file, @folder, or other context pinning features in the chat, they are not working as expected. This issue appears to be device-specific as the same feature works correctly for other users on their devices.

## Steps to reproduce the issue

## Expected behaviour

When typing @ in the Amazon Q chat, a dropdown should appear with available context options

@file should allow selection and inclusion of specific files from the workspace

@folder should allow selection and inclusion of entire folders

@workspace should include relevant workspace context

Selected context should be properly included in the chat conversation

## System details (run `AWS: About` and/or `Amazon Q: About`)

- OS: Windows_NT x64 10.0.19045
- Visual Studio Code version: 1.103.2
- AWS Toolkit version: N/A

- Amazon Q version: 1.93.0

# Additional Information

The issue is device-specific - the same feature works correctly for other users

All other Amazon Q features appear to be working normally

No source files, tests, or entry points are named. Reproduce the issue on Windows 10 with VS Code 1.103.2 and Amazon Q 1.93.0, using @file, @folder, and @workspace in the chat; compare the device-specific behavior with a working device. Done means the context suggestions appear and selected files, folders, or workspace context are included in the conversation.

Written by the indexing model from the issue text.