refactor. 코드 간소화 및 불필요한 props 제거

layers/components/blocks/Button/ScrollTop.vue

@@ -1,15 +1,12 @@
 <script setup lang="ts">
-import type { ColorObject, TrackingObject } from '#layers/types/api/common'
-
-interface Props {
-  backgroundColor: ColorObject
-}
-
-const props = defineProps<Props>()
+import type { TrackingObject } from '#layers/types/api/common'
 
 const { locale } = useI18n()
 const { y: windowY } = useWindowScroll({ behavior: 'smooth' })
 const { sendLog } = useAnalytics()
+const pageDataStore = usePageDataStore()
+
+const { topBtnColorJson } = storeToRefs(pageDataStore)
 
 const analytics = {
   action_type: 'click',
@@ -19,7 +16,7 @@ const analytics = {
 
 const showBtn = computed(() => windowY.value > 0)
 const backgroundColor = computed(
-  () => getColorCodeFromData(props.backgroundColor, 'none') ?? 'var(--primary)'
+  () => getColorCodeFromData(topBtnColorJson.value, 'none') ?? 'var(--primary)'
 )
 
 const handleScrollToTop = () => {