feat: Implement item editing capability

src/lib/submissionItemsService.ts

@@ -357,6 +357,102 @@ export async function resolveConflicts(
   return { updatedItems, newConflicts };
 }
 
+/**
+ * Edit a submission item
+ * Moderators can edit directly, regular users trigger auto-escalation
+ */
+export async function editSubmissionItem(
+  itemId: string,
+  newData: any,
+  userId: string
+): Promise<void> {
+  // Check user permissions
+  const { data: userRoles } = await supabase
+    .from('user_roles')
+    .select('role')
+    .eq('user_id', userId);
+
+  const isModerator = userRoles?.some(r => 
+    ['moderator', 'admin', 'superuser'].includes(r.role)
+  );
+
+  // Get current item
+  const { data: currentItem, error: fetchError } = await supabase
+    .from('submission_items')
+    .select('*')
+    .eq('id', itemId)
+    .single();
+
+  if (fetchError || !currentItem) {
+    throw new Error('Failed to fetch submission item');
+  }
+
+  // Preserve original data if not already saved
+  const originalData = currentItem.original_data || currentItem.item_data;
+
+  if (isModerator) {
+    // Moderators can edit directly
+    const { error } = await supabase
+      .from('submission_items')
+      .update({
+        item_data: newData,
+        original_data: originalData,
+        updated_at: new Date().toISOString()
+      })
+      .eq('id', itemId);
+
+    if (error) {
+      console.error('Error updating submission item:', error);
+      throw new Error(`Failed to update item: ${error.message}`);
+    }
+
+    // Log the edit
+    await supabase
+      .from('admin_audit_log')
+      .insert({
+        admin_user_id: userId,
+        target_user_id: currentItem.submission_id,
+        action: 'edit_submission_item',
+        details: {
+          item_id: itemId,
+          item_type: currentItem.item_type,
+          changes: newData
+        }
+      });
+  } else {
+    // Regular users trigger auto-escalation
+    const { data: submission } = await supabase
+      .from('content_submissions')
+      .select('id, status')
+      .eq('id', currentItem.submission_id)
+      .single();
+
+    if (submission && submission.status !== 'escalated') {
+      await escalateSubmission(
+        currentItem.submission_id,
+        `User requested edit for ${currentItem.item_type} item`,
+        userId
+      );
+    }
+
+    // Update item with edit request
+    const { error } = await supabase
+      .from('submission_items')
+      .update({
+        item_data: newData,
+        original_data: originalData,
+        status: 'pending',
+        updated_at: new Date().toISOString()
+      })
+      .eq('id', itemId);
+
+    if (error) {
+      console.error('Error updating submission item:', error);
+      throw new Error(`Failed to update item: ${error.message}`);
+    }
+  }
+}
+
 /**
  * Update individual submission item status
  */