feat: Implement database-level sorting for moderation queue

src/lib/moderation/queries.ts

@@ -10,6 +10,7 @@ import type {
   EntityFilter,
   StatusFilter,
   QueueTab,
+  SortConfig,
 } from '@/types/moderation';
 
 /**
@@ -24,6 +25,7 @@ export interface QueryConfig {
   isSuperuser: boolean;
   currentPage: number;
   pageSize: number;
+  sortConfig?: SortConfig;
 }
 
 /**
@@ -73,9 +75,23 @@ export function buildSubmissionQuery(
         item_data,
         status
       )
-    `)
-    .order('escalated', { ascending: false })
-    .order('created_at', { ascending: true });
+    `);
+
+  // CRITICAL: Multi-level ordering
+  // Level 1: Always sort by escalated first (descending) - escalated items always appear at top
+  query = query.order('escalated', { ascending: false });
+
+  // Level 2: Apply user-selected sort (if provided)
+  if (config.sortConfig) {
+    query = query.order(config.sortConfig.field, { 
+      ascending: config.sortConfig.direction === 'asc' 
+    });
+  }
+
+  // Level 3: Tertiary sort by created_at as tiebreaker (if not already primary sort)
+  if (!config.sortConfig || config.sortConfig.field !== 'created_at') {
+    query = query.order('created_at', { ascending: true });
+  }
 
   // Apply tab-based status filtering
   if (tab === 'mainQueue') {