fix: 修复课程库加载 - 后端限制每页最多100条

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/views/manager/growth-path-management.vue

@@ -662,8 +662,27 @@ const loadPositions = async () => {
 const loadCourses = async () => {
   coursesLoading.value = true
   try {
-    const res = await getManagerCourses({ page: 1, size: 500 })
-    courses.value = res.data?.items || res.items || []
+    // 后端限制每页最多100条，需要分页获取所有课程
+    let allCourses: Course[] = []
+    let page = 1
+    const pageSize = 100
+    let hasMore = true
+    
+    while (hasMore) {
+      const res = await getManagerCourses({ page, size: pageSize })
+      const items = res.data?.items || res.items || []
+      allCourses = [...allCourses, ...items]
+      
+      // 检查是否还有更多数据
+      const total = res.data?.total || res.total || 0
+      hasMore = allCourses.length < total && items.length === pageSize
+      page++
+      
+      // 安全限制：最多获取10页（1000门课程）
+      if (page > 10) break
+    }
+    
+    courses.value = allCourses
   } catch (error) {
     console.error('加载课程失败:', error)
   } finally {