Fix: Remove invalid sort options and validate sort fields

src/hooks/moderation/useModerationQueueManager.ts

@@ -223,14 +223,17 @@ export function useModerationQueueManager(config: ModerationQueueManagerConfig):
         `,
           );
         
-        // Map sort fields to correct database columns
-        const sortField = 
-          sort.config.field === 'username' ? 'user_id' :
-          sort.config.field;
+        // Validate sort field is an actual column in content_submissions
+        const validSortFields = ['created_at', 'submission_type', 'status', 'escalated', 'submitted_at'];
+        let sortField = sort.config.field;
+        
+        if (!validSortFields.includes(sortField)) {
+          console.warn('[Query] Invalid sort field:', sortField, '- falling back to created_at');
+          sortField = 'created_at';
+        }
         
         console.log('[Query] Sorting by:', {
-          originalField: sort.config.field,
-          mappedField: sortField,
+          field: sortField,
           direction: sort.config.direction,
           ascending: sort.config.direction === 'asc'
         });