fix: auto-expand multi-language card when toggle is enabled (#7494)

When the Multiple Languages toggle was turned on, users had to separately
click the card to expand it. Now the card auto-expands on activation,
matching the pattern used by the welcome card toggle.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/modules/survey/multi-language-surveys/components/multi-language-card.tsx

@@ -163,6 +163,9 @@ export const MultiLanguageCard: FC<MultiLanguageCardProps> = ({
       }
     } else {
       setIsMultiLanguageActivated(true);
+      if (!open) {
+        setOpen(true);
+      }
     }
   };