removed cron job that made rentals active. Now whether or not the rental is active is determined on the fly

backend/services/refundService.js

@@ -1,5 +1,6 @@
 const { Rental } = require("../models");
 const StripeService = require("./stripeService");
+const { isActive } = require("../utils/rentalStatus");
 
 class RefundService {
   /**
@@ -69,8 +70,8 @@ class RefundService {
       };
     }
 
-    // Check if rental is active
-    if (rental.status === "active") {
+    // Check if rental is active (computed from confirmed + start time passed)
+    if (isActive(rental)) {
       return {
         canCancel: false,
         reason: "Cannot cancel active rental",