删除预览界面辅助线

src/views/book/courseware/preview/CoursewarePreview.vue

@@ -1,6 +1,5 @@
 <template>
   <div ref="courserware" class="courserware" :style="computedCourserwareStyle()" @mouseup="handleTextSelection">
-    <div v-if="heightPrompt" class="height-prompt"></div>
     <template v-for="(row, i) in data.row_list">
       <div v-show="computedRowVisibility(row.row_id)" :key="i" class="row" :style="getMultipleColStyle(i)">
         <el-checkbox
@@ -167,8 +166,6 @@ export default {
       },
       selectedInfo: null,
       selectHandleInfo: null,
-      resizeObserver: null, // 用于监听高度变化
-      heightPrompt: false, // 是否显示高度提示线
     };
   },
   watch: {
@@ -197,17 +194,9 @@ export default {
       top: rect.top,
     };
     window.addEventListener('mousedown', this.handleMouseDown);
-
-    // 监听 courserware 高度变化，获取其高度
-    this.resizeObserver = new ResizeObserver(() => {
-      const rect = element.getBoundingClientRect();
-      this.heightPrompt = rect.height > 1620;
-    });
-    this.resizeObserver.observe(element);
   },
   beforeDestroy() {
     window.removeEventListener('mousedown', this.handleMouseDown);
-    this.resizeObserver.disconnect();
   },
   methods: {
     /**
@@ -1011,14 +1000,6 @@ export default {
     bottom: -15px;
   }
 
-  .height-prompt {
-    position: absolute;
-    top: 1620px;
-    left: -200px;
-    width: 1400px;
-    border-top: 2px dashed #903ff8;
-  }
-
   .row {
     display: grid;
     gap: $component-spacing;