diff --git a/reading-platform-frontend/src/views/school/ReportView.vue b/reading-platform-frontend/src/views/school/ReportView.vue
index 169c15a..417576b 100644
--- a/reading-platform-frontend/src/views/school/ReportView.vue
+++ b/reading-platform-frontend/src/views/school/ReportView.vue
@@ -13,11 +13,7 @@
           </div>
         </div>
         <div class="header-actions">
-          <a-range-picker
-            v-model:value="dateRange"
-            :placeholder="['开始日期', '结束日期']"
-            style="width: 240px;"
-          />
+          <a-range-picker v-model:value="dateRange" :placeholder="['开始日期', '结束日期']" style="width: 240px;" />
           <a-button class="export-btn">
             <DownloadOutlined class="btn-icon" />
             导出报告
@@ -71,13 +67,8 @@
     <!-- 标签页 -->
     <div class="report-tabs">
       <div class="tab-header">
-        <div
-          v-for="tab in tabs"
-          :key="tab.key"
-          class="tab-item"
-          :class="{ 'active': activeTab === tab.key }"
-          @click="activeTab = tab.key"
-        >
+        <div v-for="tab in tabs" :key="tab.key" class="tab-item" :class="{ 'active': activeTab === tab.key }"
+          @click="activeTab = tab.key">
           <BarChartOutlined v-if="tab.icon === 'bar-chart'" class="tab-icon" />
           <SolutionOutlined v-else-if="tab.icon === 'solution'" class="tab-icon" />
           <ReadOutlined v-else-if="tab.icon === 'read'" class="tab-icon" />
@@ -143,7 +134,8 @@
                 <div class="teacher-info">
                   <div class="teacher-name">{{ teacher.name }}</div>
                   <div class="teacher-rating">
-                    <StarFilled v-for="i in 5" :key="i" class="star" :class="{ 'filled': i <= Math.round(teacher.avgRating) }" />
+                    <StarFilled v-for="i in 5" :key="i" class="star"
+                      :class="{ 'filled': i <= Math.round(teacher.avgRating) }" />
                     <span class="rating-value">{{ teacher.avgRating.toFixed(1) }}</span>
                   </div>
                 </div>
@@ -187,9 +179,15 @@
               <div class="course-info">
                 <div class="course-name">{{ course.name }}</div>
                 <div class="course-stats-inline">
-                  <span><BookOutlined style="margin-right: 4px;" />授课{{ course.lessonCount }}次</span>
-                  <span><SolutionOutlined style="margin-right: 4px;" />{{ course.teacherCount }}位教师</span>
-                  <span><TeamOutlined style="margin-right: 4px;" />{{ course.studentCount }}名学生</span>
+                  <span>
+                    <BookOutlined style="margin-right: 4px;" />授课{{ course.lessonCount }}次
+                  </span>
+                  <span>
+                    <SolutionOutlined style="margin-right: 4px;" />{{ course.teacherCount }}位教师
+                  </span>
+                  <span>
+                    <TeamOutlined style="margin-right: 4px;" />{{ course.studentCount }}名学生
+                  </span>
                 </div>
               </div>
               <div class="course-rating">
@@ -221,18 +219,24 @@
               </div>
               <div class="student-stats">
                 <div class="stat-row">
-                  <span class="stat-label"><BookOutlined style="margin-right: 4px;" />参与课程</span>
+                  <span class="stat-label">
+                    <BookOutlined style="margin-right: 4px;" />参与课程
+                  </span>
                   <span class="stat-value">{{ student.lessonCount }} 次</span>
                 </div>
                 <div class="stat-row">
-                  <span class="stat-label"><AimOutlined style="margin-right: 4px;" />专注度</span>
+                  <span class="stat-label">
+                    <AimOutlined style="margin-right: 4px;" />专注度
+                  </span>
                   <div class="progress-mini">
                     <div class="progress-fill" :style="{ width: student.avgFocus * 20 + '%' }"></div>
                   </div>
                   <span class="stat-value">{{ student.avgFocus }}/5</span>
                 </div>
                 <div class="stat-row">
-                  <span class="stat-label"><FireOutlined style="margin-right: 4px;" />参与度</span>
+                  <span class="stat-label">
+                    <FireOutlined style="margin-right: 4px;" />参与度
+                  </span>
                   <div class="progress-mini pink">
                     <div class="progress-fill" :style="{ width: student.avgParticipation * 20 + '%' }"></div>
                   </div>
@@ -247,12 +251,8 @@
     </div>
 
     <!-- 教师详情弹窗 -->
-    <a-modal
-      v-model:open="teacherDetailVisible"
-      :title="`${selectedTeacher?.name} - 教师报告详情`"
-      width="600px"
-      :footer="null"
-    >
+    <a-modal v-model:open="teacherDetailVisible" :title="`${selectedTeacher?.name} - 教师报告详情`" width="600px"
+      :footer="null">
       <div v-if="selectedTeacher" class="detail-content">
         <div class="detail-header">
           <div class="detail-avatar">
@@ -283,14 +283,17 @@
         </div>
         <a-divider />
         <div class="detail-section">
-          <h4><BookOutlined style="margin-right: 8px;" />教学概况</h4>
+          <h4>
+            <BookOutlined style="margin-right: 8px;" />教学概况
+          </h4>
           <p class="detail-desc">
             {{ selectedTeacher.name }} 老师共完成 {{ selectedTeacher.lessonCount }} 次授课，
             使用了 {{ selectedTeacher.courseCount }} 门不同的课程，
             累计获得 {{ selectedTeacher.feedbackCount }} 次教学反馈。
             <template v-if="selectedTeacher.avgRating > 0">
               平均评分为 {{ selectedTeacher.avgRating.toFixed(1) }} 分，
-              {{ selectedTeacher.avgRating >= 4.5 ? '教学效果优秀！' : selectedTeacher.avgRating >= 3.5 ? '教学效果良好。' : '继续努力！' }}
+              {{ selectedTeacher.avgRating >= 4.5 ? '教学效果优秀！' : selectedTeacher.avgRating >= 3.5 ? '教学效果良好。' : '继续努力！'
+              }}
             </template>
             <template v-else>
               暂无评分数据。
@@ -301,12 +304,8 @@
     </a-modal>
 
     <!-- 课程详情弹窗 -->
-    <a-modal
-      v-model:open="courseDetailVisible"
-      :title="`${selectedCourse?.name} - 课程报告详情`"
-      width="600px"
-      :footer="null"
-    >
+    <a-modal v-model:open="courseDetailVisible" :title="`${selectedCourse?.name} - 课程报告详情`" width="600px"
+      :footer="null">
       <div v-if="selectedCourse" class="detail-content">
         <div class="detail-header">
           <div class="detail-avatar course-avatar">
@@ -337,7 +336,9 @@
         </div>
         <a-divider />
         <div class="detail-section">
-          <h4><ReadOutlined style="margin-right: 8px;" />课程概况</h4>
+          <h4>
+            <ReadOutlined style="margin-right: 8px;" />课程概况
+          </h4>
           <p class="detail-desc">
             《{{ selectedCourse.name }}》共被授课 {{ selectedCourse.lessonCount }} 次，
             有 {{ selectedCourse.teacherCount }} 位教师使用该课程进行教学，
@@ -412,7 +413,7 @@ const studentData = ref<StudentReport[]>([]);
 const totalLessons = computed(() => overviewData.value.totalLessons);
 const activeTeacherCount = computed(() => overviewData.value.activeTeacherCount);
 const usedCourseCount = computed(() => overviewData.value.usedCourseCount);
-const avgRating = computed(() => overviewData.value.avgRating.toFixed(1));
+const avgRating = computed(() => (overviewData.value.avgRating || 0).toFixed(1));
 
 // 加载数据
 const loadData = async () => {