finish setting refresh interval on client side

script.js

@@ -41,4 +41,15 @@ const form = document.getElementById('merge-form');
             });
         });
         const refreshInterval = 60 * 60 * 1000; // 1 hour
+        setInterval(() => {
+            fetch('/merge')
+                .then((response) => response.json())
+                .then((data) => {
+                    result.innerHTML = `Merged calendar URL: <a href="${data.url}">${data.url}</a>`;
+                })
+                .catch((error) => {
+                    console.error(error);
+                    result.innerHTML = 'Error merging calendars';
+                });
+        }, refreshInterval);