fix(insight): New insight shouldn't be able to add to notebook or export (#38770)

Author: lshaowei18

frontend/src/scenes/insights/InsightPageHeader.tsx

@@ -261,7 +261,9 @@ export function InsightPageHeader({ insightLogicProps }: { insightLogicProps: In
                     <ScenePanelActionsSection>
                         {hasDashboardItemId && <SceneMetalyticsSummaryButton dataAttrKey={RESOURCE_TYPE} />}
 
-                        <SceneAddToNotebookDropdownMenu shortId={insight.short_id} dataAttrKey={RESOURCE_TYPE} />
+                        {insight.short_id && (
+                            <SceneAddToNotebookDropdownMenu shortId={insight.short_id} dataAttrKey={RESOURCE_TYPE} />
+                        )}
                         <SceneAddToDashboardButton
                             dashboard={
                                 hasDashboardItemId
@@ -336,7 +338,7 @@ export function InsightPageHeader({ insightLogicProps }: { insightLogicProps: In
                             </ButtonPrimitive>
                         )}
 
-                        {exportContext ? (
+                        {exportContext && insight.short_id != null ? (
                             <SceneExportDropdownMenu
                                 dropdownMenuItems={[
                                     {