refactor(studentPage): 重构学生详情页面布局和样式

- 使用van-config-provider包裹整个页面以支持主题变量
- 调整统计图表stroke-width为70以增强可视性
- 使用van-sticky优化标签页的粘性布局
- 添加返回顶部按钮并设置样式
- 统一调整时间显示字体大小
- 优化状态图标显示效果

@@ -2,11 +2,12 @@
  * @Author: hookehuyr hookehuyr@gmail.com
  * @Date: 2025-06-19 17:12:19
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-06-19 21:32:23
+ * @LastEditTime: 2025-06-19 22:39:26
  * @FilePath: /mlaj/src/views/teacher/studentPage.vue
  * @Description: 学生详情页面
 -->
 <template>
+  <van-config-provider :theme-vars="themeVars">
     <div class="bg-gradient-to-br from-green-50 via-green-100/30 to-blue-50/30 min-h-screen">
       <!-- 学生基本信息 -->
       <div class="bg-white p-4">
@@ -56,7 +57,7 @@
             <div class="bg-white p-4 text-center">
               <div class="relative w-16 h-16 mx-auto mb-2">
                 <van-circle v-model:current-rate="studentStats.attendanceRate" :rate="studentStats.attendanceRate"
-                :speed="100" :text="studentStats.attendanceRate + '%'" stroke-width="50" color="#10b981" size="64" />
+                  :speed="100" :text="studentStats.attendanceRate + '%'" stroke-width="70" color="#10b981" size="64" />
               </div>
               <div class="text-sm text-gray-600">出勤率</div>
             </div>
@@ -66,7 +67,7 @@
             <div class="bg-white p-4 text-center">
               <div class="relative w-16 h-16 mx-auto mb-2">
                 <van-circle v-model:current-rate="studentStats.homeworkRate" :rate="studentStats.homeworkRate"
-                :speed="100" :text="studentStats.homeworkRate + '%'" stroke-width="50" color="#3b82f6" size="64" />
+                  :speed="100" :text="studentStats.homeworkRate + '%'" stroke-width="70" color="#3b82f6" size="64" />
               </div>
               <div class="text-sm text-gray-600">作业完成率</div>
             </div>
@@ -76,7 +77,7 @@
             <div class="bg-white p-4 text-center">
               <div class="relative w-16 h-16 mx-auto mb-2">
                 <van-circle v-model:current-rate="studentStats.testScore" :rate="studentStats.testScore" :speed="100"
-                :text="studentStats.testScore + '%'" stroke-width="50" color="#f59e0b" size="64" />
+                  :text="studentStats.testScore + '%'" stroke-width="70" color="#f59e0b" size="64" />
               </div>
               <div class="text-sm text-gray-600">测验成绩</div>
             </div>
@@ -93,27 +94,18 @@
             <van-icon name="arrow-down" size="14" class="ml-1" />
           </div>
         </div>
-      <!-- <div class="flex items-center justify-between mb-3">
-        <div @click="activeTab = 'homework'"
-          :class="['flex-1 text-center py-2 text-sm font-medium cursor-pointer', activeTab === 'homework' ? 'text-green-600 border-b-2 border-green-600' : 'text-gray-500']">
-          作业记录
       </div>
-        <div @click="activeTab = 'evaluation'"
-          :class="['flex-1 text-center py-2 text-sm font-medium cursor-pointer', activeTab === 'evaluation' ? 'text-green-600 border-b-2 border-green-600' : 'text-gray-500']">
-          班主任点评
-        </div>
-        <div @click="activeTab = 'statistics'"
-          :class="['flex-1 text-center py-2 text-sm font-medium cursor-pointer', activeTab === 'statistics' ? 'text-green-600 border-b-2 border-green-600' : 'text-gray-500']">
-          打卡统计
-        </div>
-      </div> -->
-      <div class="px-4 py-3 bg-white" style="position: relative;">
-        <van-tabs v-model:active="activeTab" color="#10b981" sticky animated swipeable @change="handleTabChange">
+
+      <!-- 使用van-sticky包裹van-tabs实现粘性布局 -->
+      <van-sticky :offset-top="0">
+        <div class="bg-white">
+          <van-tabs v-model:active="activeTab" color="#10b981" animated swipeable @change="handleTabChange">
             <van-tab title="作业记录" name="homework"></van-tab>
             <van-tab title="班主任点评" name="evaluation"></van-tab>
             <van-tab title="打卡统计" name="statistics"></van-tab>
           </van-tabs>
         </div>
+      </van-sticky>
 
       <!-- 记录列表 -->
       <van-list v-show="activeTab === 'statistics'" v-model:loading="recordLoading" :finished="recordFinished"
@@ -123,12 +115,12 @@
           <div class="flex items-center flex-1">
             <div class="mr-4">
               <div style="display: flex; justify-content: center;">
-                <van-icon name="calendar-o" size="16" color="#6b7280" class="mb-1" /> &nbsp;
-                <span class="text-xs text-gray-500">{{ record.date }}</span>
+                <van-icon name="calendar-o" size="18" color="#6b7280" class="mb-1" /> &nbsp;
+                <span class="text-sm text-gray-500">{{ record.date }}</span>
               </div>
               <div style="display: flex; ">
-                <van-icon name="clock-o" size="16" color="#6b7280" class="mb-1" /> &nbsp;
-                <span class="text-xs text-gray-500">{{ record.time }}</span>
+                <van-icon name="clock-o" size="18" color="#6b7280" class="mb-1" /> &nbsp;
+                <span class="text-sm text-gray-500">{{ record.time }}</span>
               </div>
             </div>
           </div>
@@ -137,7 +129,7 @@
             <span v-else-if="record.status === '迟到'" class="text-orange-500 text-sm mr-2">{{ record.status }}</span>
             <span v-else class="text-red-500 text-sm mr-2">{{ record.status }}</span>
 
-            <van-icon v-if="record.status === '正常'" name="success" color="#10b981" size="16" />
+            <van-icon v-if="record.status === '正常'" name="passed" color="#10b981" size="16" />
             <van-icon v-else-if="record.status === '迟到'" name="warning-o" color="#f59e0b" size="16" />
             <van-icon v-else name="close" color="#ef4444" size="16" />
           </div>
@@ -214,7 +206,8 @@
           </div>
         </div>
       </van-list>
-    </div>
+      <van-back-top right="5vw" bottom="10vh" />
+      <div style="height: 5rem;"></div>
 
       <!-- 状态筛选弹窗 -->
       <van-popup v-model:show="showStatusPopup" position="bottom" round>
@@ -235,6 +228,7 @@
         </div>
       </van-popup>
     </div>
+  </van-config-provider>
 </template>
 
 <script setup>
@@ -253,6 +247,10 @@ const router = useRouter()
 const route = useRoute()
 useTitle(route.meta.title);
 
+const themeVars = reactive({
+  buttonNormalFontSize: '1rem',
+})
+
 // 学生信息
 const studentInfo = ref({
   id: 1,
@@ -685,7 +683,11 @@ const formatData = (data) => {
 }
 </script>
 
-<style scoped lang="less">
+<style lang="less">
+.van-back-top {
+  background-color: #4caf50;
+}
+
 /* 自定义样式 */
 .van-circle {
   font-size: 12px;