feat(gallery): transition to and from the nds

app/components/Gallery/BottomScreen/BottomScreen.vue

@@ -0,0 +1,21 @@
+<script setup lang="ts">
+const { onRender } = useScreen();
+const store = useGalleryStore();
+const { assets } = useAssets();
+
+onRender((ctx) => {
+  ctx.drawImage(assets.home.bottomScreen.background, 0, 0);
+
+  ctx.fillStyle = "#000000";
+  ctx.globalAlpha = store.isIntro
+    ? store.intro.fadeOpacity
+    : store.isOutro
+      ? store.outro.fadeOpacity
+      : 0;
+  ctx.fillRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
+});
+</script>
+
+<template>
+  <div />
+</template>