refactor: 班级列表 UI 优化

- 移除本月授课进度条
- 简化操作按钮："学生"改为"详情"，移除"记录"按钮

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

reading-platform-frontend/src/views/teacher/classes/ClassListView.vue

@@ -85,21 +85,6 @@
           </div>
         </div>
 
-        <!-- 进度条 -->
-        <div class="class-progress">
-          <div class="progress-label">本月授课进度</div>
-          <div class="progress-bar">
-            <div
-              class="progress-fill"
-              :style="{
-                width: Math.min((cls.lessonCount / 20) * 100, 100) + '%',
-                background: getGradeGradient(cls.grade)
-              }"
-            ></div>
-          </div>
-          <div class="progress-text">{{ Math.min(Math.round((cls.lessonCount / 20) * 100), 100) }}%</div>
-        </div>
-
         <!-- 操作按钮 -->
         <div class="class-actions">
           <button class="action-btn primary" @click.stop="prepareLesson(cls)">
@@ -108,11 +93,7 @@
           </button>
           <button class="action-btn" @click.stop="viewStudents(cls)">
             <UsergroupAddOutlined />
-            学生
-          </button>
-          <button class="action-btn" @click.stop="viewHistory(cls)">
-            <BarChartOutlined />
-            记录
+            详情
           </button>
         </div>
       </div>
@@ -237,9 +218,6 @@ const viewStudents = (cls: ClassInfo) => {
   router.push(`/teacher/classes/${cls.id}/students`);
 };
 
-const viewHistory = (cls: ClassInfo) => {
-  router.push(`/teacher/classes/${cls.id}/lessons`);
-};
 </script>
 
 <style scoped>
@@ -561,38 +539,6 @@ const viewHistory = (cls: ClassInfo) => {
   margin: 0 16px;
 }
 
-/* 进度条 */
-.class-progress {
-  margin-bottom: 20px;
-}
-
-.progress-label {
-  font-size: 12px;
-  color: #888;
-  margin-bottom: 8px;
-}
-
-.progress-bar {
-  height: 8px;
-  background: #F0F0F0;
-  border-radius: 4px;
-  overflow: hidden;
-}
-
-.progress-fill {
-  height: 100%;
-  border-radius: 4px;
-  transition: width 0.3s ease;
-}
-
-.progress-text {
-  font-size: 12px;
-  color: #FF8C42;
-  font-weight: 500;
-  margin-top: 6px;
-  text-align: right;
-}
-
 /* 操作按钮 */
 .class-actions {
   display: flex;