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

backend/tests/unit/routes/rentals.test.js

@@ -790,11 +790,15 @@ describe('Rentals Routes', () => {
   });
 
   describe('POST /:id/mark-completed', () => {
+    // Active status is computed: confirmed + startDateTime in the past
+    const pastDate = new Date();
+    pastDate.setHours(pastDate.getHours() - 1); // 1 hour ago
     const mockRental = {
       id: 1,
       ownerId: 1,
       renterId: 2,
-      status: 'active',
+      status: 'confirmed',
+      startDateTime: pastDate,
       update: jest.fn(),
     };
 
@@ -837,7 +841,7 @@ describe('Rentals Routes', () => {
 
       expect(response.status).toBe(400);
       expect(response.body).toEqual({
-        error: 'Can only mark active or confirmed rentals as completed',
+        error: 'Can only mark active rentals as completed',
       });
     });
   });