fix: Replace deprecated bodyStyle with styles.body in StepClaimConfirmation

Ant Design warning:
- bodyStyle prop is deprecated
- Use styles.body instead

Changed:
- StepClaimConfirmation.tsx: Replaced bodyStyle with styles={{ body: {...} }}

Files:
- frontend/src/components/form/StepClaimConfirmation.tsx

frontend/src/components/form/StepClaimConfirmation.tsx

@@ -149,12 +149,14 @@ export default function StepClaimConfirmation({
 
   return (
     <Card 
-      bodyStyle={{ 
+      styles={{
+        body: {
           padding: 0,
           height: 'calc(100vh - 200px)',
           minHeight: '800px',
           display: 'flex',
           flexDirection: 'column',
+        }
       }}
     >
       <iframe