command 'avalonia.showPreviewToSide' not found in macOS vscode

[gjhave]

vscode show error information as "command 'avalonia.showPreviewToSide' not found" when click the show preview of the *.axaml file. Also the autocomplete feature not working.
macOS: 26.3(m3 pro)
vscode: 1.109.5
.net sdk: 10.0.103
avalonia for vscode: 1.0.4
screenshot below:

[mrlacey]

MattBot: Moving this to a new, centralized repo where it can more easily be managed.