fix: preserve chat controls on chat remount

Author: Algorithm5838

src/lib/components/chat/Chat.svelte

@@ -2842,9 +2842,9 @@
 	};
 
 	const saveControls = async () => {
-		if (!$chatId || $temporaryChatEnabled) return;
-		await updateChatById(localStorage.token, $chatId, { params, files: chatFiles }).catch((err) =>
-			console.error('[controls autosave]', err)
+		if (loading || !$chatId || $temporaryChatEnabled) return;
+		await updateChatById(localStorage.token, $chatId, { params, files: chatFiles }).catch(
+			(err) => console.error('[controls autosave]', err)
 		);
 	};