feat(移动端): 优化教师端上课记录筛选排版

- 筛选区改为可换行/移动端堆叠布局，避免按钮被挤压或横向溢出

Made-with: Cursor

reading-platform-frontend/src/views/teacher/lessons/LessonListView.vue

@@ -8,11 +8,11 @@
 
     <!-- 筛选区域 -->
     <div class="filter-section">
-      <a-space :size="16">
+      <div class="filter-row">
         <a-select
           v-model:value="filters.status"
           placeholder="课程状态"
-          style="width: 140px;"
+          class="filter-status"
           allowClear
           @change="loadLessons"
         >
@@ -23,11 +23,11 @@
         </a-select>
         <a-range-picker
           v-model:value="filters.dateRange"
-          style="width: 260px;"
+          class="filter-range"
           @change="loadLessons"
         />
-        <a-button @click="resetFilters">重置</a-button>
-      </a-space>
+        <a-button class="filter-reset" @click="resetFilters">重置</a-button>
+      </div>
     </div>
 
     <!-- 记录列表 -->
@@ -367,6 +367,9 @@ onMounted(() => {
 
 <style scoped lang="scss">
 .lesson-list-view {
+  overflow-x: hidden;
+  min-width: 0;
+
   .page-header {
     margin-bottom: 24px;
 
@@ -391,6 +394,51 @@ onMounted(() => {
     border-radius: 8px;
   }
 
+  .filter-row {
+    display: flex;
+    flex-wrap: wrap;
+    align-items: center;
+    gap: 12px;
+    min-width: 0;
+  }
+
+  .filter-status {
+    width: 140px;
+    min-width: 0;
+  }
+
+  .filter-range {
+    width: 260px;
+    min-width: 0;
+    max-width: 100%;
+  }
+
+  .filter-reset {
+    white-space: nowrap;
+  }
+
+  @media (max-width: 768px) {
+    .filter-row {
+      flex-direction: column;
+      align-items: stretch;
+    }
+
+    .filter-status,
+    .filter-range {
+      width: 100% !important;
+    }
+
+    .filter-reset {
+      width: 100%;
+    }
+
+    /* RangePicker 内部输入避免撑出容器 */
+    :deep(.ant-picker) {
+      width: 100%;
+      max-width: 100%;
+    }
+  }
+
   .lesson-list {
     display: flex;
     flex-direction: column;