feat: preview html

src/lib/stores/index.ts

@@ -74,6 +74,8 @@ export const showOverview = writable(false);
 export const showArtifacts = writable(false);
 export const showCallOverlay = writable(false);
 
+export const artifactCode = writable(null);
+
 export const temporaryChatEnabled = writable(false);
 export const scrollPaginationEnabled = writable(false);
 export const currentChatPage = writable(1);