feat: 新增Excel内容提取支持 & 修复成绩查询课程筛选

- 后端 knowledge_analysis_v2.py: 新增 _extract_excel_content 方法支持xlsx/xls文件
- 前端 student-scores.vue: 课程筛选改为动态加载，修复筛选参数传递

frontend/src/views/manager/student-scores.vue

@@ -62,12 +62,14 @@
           </el-select>
         </el-form-item>
         <el-form-item label="课程">
-          <el-select v-model="filterForm.course" placeholder="请选择" clearable>
-            <el-option label="全部课程" value="" />
-            <el-option label="皮肤管理基础" value="skin_management" />
-            <el-option label="美容产品知识" value="beauty_products" />
-            <el-option label="客户沟通技巧" value="communication" />
-            <el-option label="轻医美项目" value="light_medical" />
+          <el-select v-model="filterForm.courseId" placeholder="请选择课程" clearable style="width: 200px">
+            <el-option label="全部课程" :value="null" />
+            <el-option 
+              v-for="course in courseList" 
+              :key="course.id" 
+              :label="course.name" 
+              :value="course.id" 
+            />
           </el-select>
         </el-form-item>
         <el-form-item label="成绩范围">
@@ -323,6 +325,7 @@
 import { ref, reactive, computed, onMounted } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { getStudentScores, getStudentScoresStatistics, getExamMistakes, deleteExamRecord, type StudentScoreRecord, type MistakeRecord } from '@/api/manager/scores'
+import { getManagerCourses } from '@/api/manager'
 
 // 加载状态
 const loading = ref(false)
@@ -350,10 +353,30 @@ const mistakesList = ref<MistakeRecord[]>([])
 const filterForm = reactive({
   studentName: '',
   position: '',
-  course: '',
+  courseId: null as number | null,
   scoreRange: ''
 })
 
+// 课程列表
+const courseList = ref<Array<{id: number, name: string}>>([])
+
+/**
+ * 加载课程列表
+ */
+const loadCourseList = async () => {
+  try {
+    const res = await getManagerCourses({ page: 1, size: 100, status: 'published' })
+    if (res.code === 200 && res.data) {
+      courseList.value = res.data.items.map(item => ({
+        id: item.id,
+        name: item.name || item.title
+      }))
+    }
+  } catch (error) {
+    console.error('加载课程列表失败:', error)
+  }
+}
+
 // 成绩统计数据
 const scoreStats = ref([
   {
@@ -498,6 +521,9 @@ const loadScoresList = async () => {
     if (filterForm.position) {
       params.position = getPositionText(filterForm.position)
     }
+    if (filterForm.courseId) {
+      params.course_id = filterForm.courseId
+    }
     if (filterForm.scoreRange) {
       params.score_range = filterForm.scoreRange
     }
@@ -568,7 +594,7 @@ const handleSearch = () => {
 const handleReset = () => {
   filterForm.studentName = ''
   filterForm.position = ''
-  filterForm.course = ''
+  filterForm.courseId = null
   filterForm.scoreRange = ''
   dateRange.value = [
     new Date(new Date().setDate(new Date().getDate() - 30)),
@@ -700,6 +726,7 @@ const handleDeleteRecord = async (record: StudentScoreRecord) => {
 
 // 组件挂载时初始化数据
 onMounted(() => {
+  loadCourseList()
   loadScoresList()
   loadStatistics()
 })