fix: message delete issue

src/lib/components/chat/Chat.svelte

@@ -239,6 +239,8 @@
 	};
 
 	const showMessage = async (message) => {
+		await tick();
+
 		const _chatId = JSON.parse(JSON.stringify($chatId));
 		let _messageId = JSON.parse(JSON.stringify(message.id));
 

src/lib/components/common/Loader.svelte

@@ -33,7 +33,9 @@
 	});
 
 	onDestroy(() => {
-		observer.disconnect();
+		if (observer) {
+			observer.disconnect();
+		}
 
 		if (intervalId) {
 			clearInterval(intervalId);