fix: 修复分页功能

frontend/src/pages/List.jsx

@@ -17,7 +17,7 @@ export default function List() {
   const [isAdmin, setIsAdmin] = useState(false)
   const [page, setPage] = useState(1)
   const [hasMore, setHasMore] = useState(true)
-  const [initialLoad, setInitialLoad] = useState(true)
+  const [loadingMore, setLoadingMore] = useState(false)
 
   useEffect(() => {
     // 检查是否管理员
@@ -49,19 +49,7 @@ export default function List() {
         setFilter('')
         setFilterType('')
       }
-      // 滚动加载更多
-    const handleScroll = () => {
-      if (loading || !hasMore) return
-      const scrollTop = window.scrollY || document.documentElement.scrollTop
-      const scrollHeight = document.documentElement.scrollHeight
-      const clientHeight = document.documentElement.clientHeight
-      if (scrollTop + clientHeight >= scrollHeight - 100) {
-        fetchCollections(true)
-      }
-    }
-    
-    window.addEventListener('scroll', handleScroll)
-    return () => window.removeEventListener('scroll', handleScroll)
+      fetchCollections()
     }
     
     handleHashChange()
@@ -73,22 +61,28 @@ export default function List() {
       window.removeEventListener('focus', fetchCollections)
     }
   }, [])
-
-  const fetchCollections = async (reset = false) => {
-    const token = localStorage.getItem('token')
-    const currentPage = reset ? 1 : page
     
-    try {
-      if (reset) {
-        setCollections([])
-        setPage(1)
-        setLoading(true)
-        setInitialLoad(true)
-      } else {
-        setLoading(true)
+    // 滚动加载更多
+    useEffect(() => {
+      const handleScroll = () => {
+        if (loading || loadingMore || !hasMore) return
+        const scrollTop = window.scrollY || document.documentElement.scrollTop
+        const scrollHeight = document.documentElement.scrollHeight
+        const clientHeight = document.documentElement.clientHeight
+        if (scrollTop + clientHeight >= scrollHeight - 100) {
+          fetchCollections(false)
+        }
       }
       
-      const res = await fetch(`/api/collections?page=${currentPage}&limit=50`, {
+      window.addEventListener('scroll', handleScroll)
+      return () => window.removeEventListener('scroll', handleScroll)
+    }, [loading, loadingMore, hasMore, page])
+
+  const fetchCollections = async () => {
+    // set loading based on reset
+    const token = localStorage.getItem('token')
+    try {
+      const res = await fetch('/api/collections?page=1&limit=50', {
         headers: token ? { 'Authorization': 'Bearer ' + token } : {}
       })
       
@@ -107,18 +101,6 @@ export default function List() {
         list = list.items
       }
       
-      // 分页处理
-      if (reset) {
-        setCollections(list || [])
-      } else {
-        setCollections(prev => [...prev, ...(list || [])])
-      }
-      
-      // 判断是否还有更多数据
-      const receivedCount = list ? list.length : 0
-      setHasMore(receivedCount >= 50)
-      if (!initialLoad) setPage(prev => prev + 1)
-      
       // 应用筛选条件
       // 用户ID筛选（从URL获取）
       if (userIdFilter) {
@@ -157,7 +139,14 @@ export default function List() {
         console.log(`筛选：${filterType} = ${filter}, 结果：${list.length}条`)
       }
       
-      setCollections(list || [])
+      # 分页处理
+      if (page === 1) {
+        setCollections(list || [])
+      } else {
+        setCollections(prev => [...prev, ...(list || [])])
+      }
+      setHasMore((list || []).length >= 50)
+      if (page > 1) setPage(p => p + 1)
     } catch (e) {
       console.error('Fetch collections error:', e)
       // 网络错误也跳转到登录页