refactor(checkout): update checkout navigation logic to retain purchase state

src/app/core/layout/store-layout/store-layout.component.ts

@@ -187,8 +187,8 @@ export class StoreLayoutComponent implements OnInit {
   protected async onLogoutClick(): Promise<void> {
     const isLeavingCheckout = this.router.url.startsWith('/checkout');
 
-    // Checkout must be left while the authenticated session is still valid so
-    // its CanDeactivate guard can cancel the pending purchase.
+    // Leave checkout before closing the authenticated session so its component
+    // can stop payment polling cleanly. The checkout itself remains pending.
     if (isLeavingCheckout) {
       const navigationSucceeded = await this.router.navigate(['/']);