feat: hide favorite column when no items are favorited

Hide the favorite column in chart and dashboard list views when none
of the items on the current page have been marked as favorites. This
improves the UI by removing empty, non-functional columns.

Changes:
- Add memoized hasFavoritesOnPage helper to detect when favorites exist
- Update column hidden condition to include favorite availability check
- Apply consistently to both ChartList and DashboardList components

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: eschutho

superset-frontend/src/pages/ChartList/index.tsx

@@ -315,6 +315,14 @@ function ChartList(props: ChartListProps) {
     };
   };
 
+  const hasFavoritesOnPage = useMemo(
+    () =>
+      charts.length > 0 &&
+      Object.keys(favoriteStatus).length === charts.length &&
+      Object.values(favoriteStatus).some(status => status === true),
+    [charts.length, favoriteStatus],
+  );
+
   const columns = useMemo(
     () => [
       {
@@ -334,7 +342,7 @@ function ChartList(props: ChartListProps) {
         id: 'id',
         disableSortBy: true,
         size: 'xs',
-        hidden: !userId,
+        hidden: !userId || !hasFavoritesOnPage,
       },
       {
         Cell: ({

superset-frontend/src/pages/DashboardList/index.tsx

@@ -300,6 +300,14 @@ function DashboardList(props: DashboardListProps) {
     );
   }
 
+  const hasFavoritesOnPage = useMemo(
+    () =>
+      dashboards.length > 0 &&
+      Object.keys(favoriteStatus).length === dashboards.length &&
+      Object.values(favoriteStatus).some(status => status === true),
+    [dashboards.length, favoriteStatus],
+  );
+
   const columns = useMemo(
     () => [
       {
@@ -319,7 +327,7 @@ function DashboardList(props: DashboardListProps) {
         id: 'id',
         disableSortBy: true,
         size: 'xs',
-        hidden: !user?.userId,
+        hidden: !user?.userId || !hasFavoritesOnPage,
       },
       {
         Cell: ({