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={{ 
-        padding: 0,
-        height: 'calc(100vh - 200px)',
-        minHeight: '800px',
-        display: 'flex',
-        flexDirection: 'column',
+      styles={{
+        body: {
+          padding: 0,
+          height: 'calc(100vh - 200px)',
+          minHeight: '800px',
+          display: 'flex',
+          flexDirection: 'column',
+        }
       }}
     >
       <iframe