Add a grace period to the refund window

apps/pr-reviewer/fixtures/demo-pr/checkout-flow.integration.test.ts

@@ -18,10 +18,10 @@ describe('checkout flow', () => {
     await settle();
   });
 
-  it('refund window closes after 30 days', async () => {
+  it('refund window closes after the grace period', async () => {
     const now = new Date('2026-10-01T12:00:00Z');
-    expect(canRefund(new Date(now.getTime() - 30 * DAY_MS), now)).toBe(true);
-    expect(canRefund(new Date(now.getTime() - 31 * DAY_MS), now)).toBe(false);
+    expect(canRefund(new Date(now.getTime() - 32 * DAY_MS), now)).toBe(true);
+    expect(canRefund(new Date(now.getTime() - 33 * DAY_MS), now)).toBe(false);
     await settle();
   });
 

apps/pr-reviewer/fixtures/demo-pr/refund-window.test.ts

@@ -26,12 +26,20 @@ describe('canRefund', () => {
     expect(canRefund(daysAgo(30), now)).toBe(true);
   });
 
-  it('refuses a refund one millisecond past 30 days', () => {
-    expect(canRefund(new Date(daysAgo(30).getTime() - 1), now)).toBe(false);
+  it('allows a refund during the 2-day grace period', () => {
+    expect(canRefund(daysAgo(31), now)).toBe(true);
   });
 
-  it('refuses a refund after 31 days', () => {
-    expect(canRefund(daysAgo(31), now)).toBe(false);
+  it('allows a refund exactly 32 days after delivery', () => {
+    expect(canRefund(daysAgo(32), now)).toBe(true);
+  });
+
+  it('refuses a refund one millisecond past the grace period', () => {
+    expect(canRefund(new Date(daysAgo(32).getTime() - 1), now)).toBe(false);
+  });
+
+  it('refuses a refund after 33 days', () => {
+    expect(canRefund(daysAgo(33), now)).toBe(false);
   });
 
   it('refuses a refund after a year', () => {

apps/pr-reviewer/fixtures/demo-pr/refund-window.ts

@@ -1,4 +1,7 @@
+const REFUND_WINDOW_DAYS = 30;
+const GRACE_PERIOD_DAYS = 2;
+
 export function canRefund(deliveredAt: Date, now = new Date()): boolean {
   const days = (now.getTime() - deliveredAt.getTime()) / 86_400_000;
-  return days <= 30;
+  return days <= REFUND_WINDOW_DAYS + GRACE_PERIOD_DAYS;
 }