Product tracking doc 260513 added project_id + project_kind to
studio_view (artifact), studio_click (share_option), and
artifact_export_result. The Studio funnel can now group by project
type without joining run_created on the back end.
- contracts: 3 props gain required project_id + project_kind
- ProjectView → FileWorkspace → FileViewer: thread projectKind down,
converting metadata.kind via projectKindToTracking once at the top
- FileViewer + HtmlViewer: populate the three call sites