fix(webapp): keep schedule purchase drafts in sync

Author: carderne

apps/webapp/app/components/schedules/PurchaseSchedulesModal.tsx

@@ -73,6 +73,12 @@ export function PurchaseSchedulesModal({
     setOpen(nextOpen);
   };
 
+  useEffect(() => {
+    if (!open) return;
+    // oxlint-disable-next-line react/react-compiler -- Keep the open draft aligned with authoritative billing values.
+    setBundles(Math.round(extraSchedules / stepSize));
+  }, [open, extraSchedules, stepSize]);
+
   useEffect(() => {
     const data = fetcher.data;
     if (