feat(contact): intro animation

app/components/Contact/BottomScreen/Background.vue

@@ -1,16 +1,31 @@
 <script setup lang="ts">
-const backgroundImage = useTemplateRef("backgroundImage");
+const store = useContactStore();
+
+const homeBackgroundImage = useTemplateRef("homeBackgroundImage");
+const contactBackgroundImage = useTemplateRef("contactBackgroundImage");
+
+callOnce("contactIntro", store.animateIntro);
 
 useRender((ctx) => {
-  if (!backgroundImage.value) return;
+  if (!homeBackgroundImage.value || !contactBackgroundImage.value) return;
 
-  ctx.drawImage(backgroundImage.value, 0, 0);
+  if (store.isIntro) {
+    ctx.drawImage(homeBackgroundImage.value, 0, 0);
+    ctx.globalAlpha = store.intro.stage2Opacity;
+  }
+
+  ctx.drawImage(contactBackgroundImage.value, 0, 0);
 });
 </script>
 
 <template>
   <img
-    ref="backgroundImage"
+    ref="homeBackgroundImage"
+    src="/assets/images/home/bottom-screen/background.png"
+    hidden
+  />
+  <img
+    ref="contactBackgroundImage"
     src="/assets/images/contact/bottom-screen/background.png"
     hidden
   />