fix: 修复课程列表API路径和数据结构

frontend/src/api/manager/index.ts

@@ -360,7 +360,7 @@ export const getManagerCourses = (params: {
     total: number
     page: number
     size: number
-  }>('/api/v1/manager/courses', { params })
+  }>('/api/v1/courses', { params })
 }
 
 /**

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

@@ -567,7 +567,9 @@ const loadCourses = async () => {
   coursesLoading.value = true
   try {
     const res = await getManagerCourses({ page: 1, size: 200 })
-    courses.value = res.items || []
+    // API返回格式: { code, message, data: { items, total, page, size } }
+    courses.value = res.data?.items || res.items || []
+    console.log('加载课程列表成功:', courses.value.length, '门课程')
   } catch (error) {
     console.error('加载课程列表失败:', error)
   } finally {