Add extra message to +error.svelte to handle, and clarify 'OFFLINE' error.

src/routes/+layout.svelte

@@ -22,11 +22,11 @@
 		if (browser && 'serviceWorker' in navigator) {
 			try {
 				const registration = await navigator.serviceWorker.register('/service-worker.js', {
-					type: 'module',
+					type: 'module'
 				});
 				console.info('OwlBoard Service Worker registered', registration.scope);
 			} catch (error) {
-				console.error('Service Worker installation failed: ', error)
+				console.error('Service Worker installation failed: ', error);
 			}
 		}
 	});