feat(3d-nds): lag detection

app/pages/index.vue

@@ -1,11 +1,22 @@
 <script setup lang="ts">
 import { useWindowSize } from "@vueuse/core";
 import gsap from "gsap";
+import { LazyLagModal } from "#components";
 
 const { isReady } = useAssets();
 
 const app = useAppStore();
 
+const overlay = useOverlay();
+const lagModal = overlay.create(LazyLagModal);
+
+watch(
+  () => app.lagDetected,
+  (detected) => {
+    if (detected) lagModal.open();
+  },
+);
+
 const topScreen = useTemplateRef("topScreen");
 const bottomScreen = useTemplateRef("bottomScreen");