feat: 通用滚动加载工具

frontend/src/utils/loadMore.js

@@ -0,0 +1,31 @@
+import { ref, onMounted, onUnmounted, onActivated, nextTick } from 'vue'
+
+export function useScrollLoadMore(loadMore, offset = 50) {
+  const savedScrollTop = ref(0)
+
+  const handleScroll = () => {
+    const scrollTop = window.scrollY || document.documentElement.scrollTop
+    const scrollHeight = document.documentElement.scrollHeight
+    const windowHeight = window.innerHeight
+    savedScrollTop.value = scrollTop
+    if (scrollHeight - (scrollTop + windowHeight) <= offset) {
+      loadMore()
+    }
+  }
+
+  onMounted(() => {
+    window.addEventListener('scroll', handleScroll, { passive: true })
+  })
+
+  onUnmounted(() => {
+    window.removeEventListener('scroll', handleScroll)
+  })
+
+  onActivated(() => {
+    nextTick(() => {
+      window.scrollTo({ top: savedScrollTop.value })
+    })
+  })
+
+  return { savedScrollTop }
+}