Fix: Remove all traces of username sorting

src/components/moderation/ActiveFiltersDisplay.tsx

@@ -22,7 +22,6 @@ const getEntityFilterIcon = (filter: EntityFilter) => {
 
 const getSortFieldLabel = (field: SortField): string => {
   switch (field) {
-    case 'username': return 'Submitter';
     case 'submission_type': return 'Type';
     case 'escalated': return 'Escalated';
     case 'status': return 'Status';

src/lib/moderation/sorting.ts

@@ -27,12 +27,6 @@ export function sortModerationItems(
         comparison = new Date(a.created_at).getTime() - new Date(b.created_at).getTime();
         break;
         
-      case 'username':
-        const usernameA = a.user_profile?.username || a.user_profile?.display_name || '';
-        const usernameB = b.user_profile?.username || b.user_profile?.display_name || '';
-        comparison = usernameA.localeCompare(usernameB);
-        break;
-        
       case 'submission_type':
         comparison = (a.submission_type || '').localeCompare(b.submission_type || '');
         break;
@@ -77,7 +71,16 @@ export function loadSortConfig(key: string = 'moderationQueue_sortConfig'): Sort
   try {
     const saved = localStorage.getItem(key);
     if (saved) {
-      return JSON.parse(saved);
+      const config = JSON.parse(saved);
+      
+      // Migrate old 'username' sort to 'created_at'
+      if (config.field === 'username') {
+        console.warn('[Sort] Migrating deprecated username sort to created_at');
+        config.field = 'created_at';
+        saveSortConfig(config, key); // Save the migrated config
+      }
+      
+      return config;
     }
   } catch (error) {
     console.error('Failed to load sort config:', error);
@@ -123,8 +126,6 @@ export function getSortFieldLabel(field: SortField): string {
   switch (field) {
     case 'created_at':
       return 'Date Created';
-    case 'username':
-      return 'Submitter';
     case 'submission_type':
       return 'Type';
     case 'status':

src/types/moderation.ts

@@ -102,7 +102,7 @@ export type QueueTab = 'mainQueue' | 'archive';
 /**
  * Fields that can be used for sorting the moderation queue
  */
-export type SortField = 'created_at' | 'username' | 'submission_type' | 'status' | 'escalated';
+export type SortField = 'created_at' | 'submission_type' | 'status' | 'escalated';
 
 /**
  * Direction for sorting (ascending or descending)