UX enhancements

src/composables/useLayers.ts

@@ -30,6 +30,8 @@ export const useLayers = () => {
 
   const visibleLayers = computed(() => layers.value.filter(l => l.visible));
 
+  const hasSprites = computed(() => layers.value.some(l => l.sprites.length > 0));
+
   const updateSpritePosition = (id: string, x: number, y: number) => {
     const l = activeLayer.value;
     if (!l) return;
@@ -238,6 +240,7 @@ export const useLayers = () => {
     addLayer,
     removeLayer,
     moveLayer,
+    hasSprites,
   };
 };