fix: preserve correct column order when table layout is changed with time comparison enabled (#34300)

superset-frontend/plugins/plugin-chart-table/src/TableChart.tsx

@@ -629,7 +629,11 @@ export default function TableChart<D extends DataRecord = DataRecord>(
       const startPosition = value[0];
       const colSpan = value.length;
       // Retrieve the originalLabel from the first column in this group
-      const originalLabel = columnsMeta[value[0]]?.originalLabel || key;
+      const firstColumnInGroup = filteredColumnsMeta[startPosition];
+      const originalLabel = firstColumnInGroup
+        ? columnsMeta.find(col => col.key === firstColumnInGroup.key)
+            ?.originalLabel || key
+        : key;
 
       // Add placeholder <th> for columns before this header
       for (let i = currentColumnIndex; i < startPosition; i += 1) {