[BUG] Project Access Returns No Results

## Bug Description

When creating an AKS Project, the user search field fails to return results when searching for users to assign project access. Instead of displaying a searchable dropdown of Microsoft Entra ID users, the field remains empty and no users can be selected.

## Steps to Reproduce

1. Open AKS desktop.
2. Navigate to Projects.
3. Select **Create Project**.
4. Choose an eligible AKS cluster.
5. Proceed to the **Project Access** step.
6. Begin typing a user's name or email address in the user search field.
7. Observe that no search results are returned.

## Expected Behavior

The Project Access user picker should display matching Microsoft Entra ID users as the user types, allowing project administrators to easily search for and select users to grant project access.

## Actual Behavior

No search results are displayed when typing in the Project Access user search field. Users cannot be selected through the search experience, preventing project administrators from assigning access using the expected workflow.

## Screenshots

## Environment

- **Plugin Version - AKS desktop**: [0.9.0]
- **Headlamp Version**: [0.43.0]
- **Kubernetes Version**: [1.35.6]
- **Azure CLI Version**: [na]
- **Browser**: [na]
- **OS**: [e.g. macOS 26.6.1]

## Additional Context

The issue was observed while testing AKS Projects. The expected experience is a searchable dropdown that returns users from Microsoft Entra ID. The behavior appears inconsistent across environments and may be related to the user lookup functionality rather than project creation itself.

## Logs

If applicable, please include relevant logs:

```
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## Checklist

- [ ] I have searched for existing issues
- [ ] I have provided all necessary information
- [ ] I have tested with the latest version
- [ ] I have included steps to reproduce