badge when owner gets pending rental request

frontend/src/pages/MyListings.tsx

@@ -164,6 +164,9 @@ const MyListings: React.FC = () => {
 
       fetchOwnerRentals();
       fetchAvailableChecks(); // Refresh available checks after rental confirmation
+
+      // Notify Navbar to update pending count
+      window.dispatchEvent(new CustomEvent("rentalStatusChanged"));
     } catch (err: any) {
       console.error("Failed to accept rental request:", err);