Fix: Implement comprehensive sorting fixes

src/lib/moderation/sorting.ts

@@ -57,7 +57,7 @@ export function sortModerationItems(
 export function getDefaultSortConfig(): SortConfig {
   return {
     field: 'created_at',
-    direction: 'asc',
+    direction: 'desc', // Newest first by default
   };
 }