fix(filters): preserve backend metric-based sorting in select filters

Fixes broken metric-based sorting (e.g., sort by MAU) in select filter components
by preventing frontend alphabetical sorting from overriding backend sort order.

Problem:
- When sortMetric was specified in filter configuration, the backend would
  correctly sort data by the specified metric (e.g., MAU, revenue, etc.)
- However, the frontend sortComparator was then applying alphabetical sorting
  on the labels, completely overriding the intended metric-based order
- This resulted in filters showing values sorted alphabetically instead of
  by their actual metric values

Solution:
- Check if formData.sortMetric is specified before applying sort logic
- When sortMetric exists, return 0 to preserve the original backend order
- Only apply alphabetical sorting when no sortMetric is configured
- Add sortMetric to useCallback dependency array for proper re-rendering

This ensures that metric-based sorting (like "sort by MAU") works correctly
while maintaining alphabetical sorting as a fallback for other cases.

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

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

Author: eschutho

superset-frontend/src/filters/components/Select/SelectFilterPlugin.tsx

@@ -317,13 +317,20 @@ export default function PluginFilterSelect(props: PluginFilterSelectProps) {
 
   const sortComparator = useCallback(
     (a: LabeledValue, b: LabeledValue) => {
+      // When sortMetric is specified, the backend already sorted the data correctly
+      // Don't override the backend's metric-based sorting with frontend alphabetical sorting
+      if (formData.sortMetric) {
+        return 0; // Preserve the original order from the backend
+      }
+
+      // Only apply alphabetical sorting when no sortMetric is specified
       const labelComparator = propertyComparator('label');
       if (formData.sortAscending) {
         return labelComparator(a, b);
       }
       return labelComparator(b, a);
     },
-    [formData.sortAscending],
+    [formData.sortAscending, formData.sortMetric],
   );
 
   // Use effect for initialisation for filter plugin