zenno: use data from api

zenno/src/routes/doc/Article.svelte

@@ -20,13 +20,13 @@
 			tocViewed = true;
 			obs.disconnect();
 		}
-	}
+	};
 
 	$effect(() => {
 		if (tocElem == null) {
 			return;
 		}
-		const obs = new IntersectionObserver(observeTOC, {rootMargin: "20% 0px"});
+		const obs = new IntersectionObserver(observeTOC, { rootMargin: '20% 0px' });
 		obs.observe(tocElem);
 	});