fix(bom): assign unique popper-class by index to fix child select infinite scroll

inventory-web/src/views/bom/BomManage.vue

@@ -67,7 +67,7 @@
                   style="width: 100%"
                   :disabled="isEditMode"
                   class="beautified-select"
-                  popper-class="bom-loadmore-popper"
+                  popper-class="bom-loadmore-popper parent-popper"
                   @visible-change="(visible: boolean) => handleVisibleChange(visible, 'parent')"
               >
                 <el-option
@@ -147,7 +147,7 @@
                   :loading="selectLoading"
                   style="width: 100%"
                   :loading-text="`正在加载第 ${childQueryParams.page} 页...`"
-                  popper-class="bom-loadmore-popper"
+                  :popper-class="`bom-loadmore-popper child-popper-${$index}`"
                   @visible-change="(visible: boolean) => handleVisibleChange(visible, 'child', $index)"
               >
                 <el-option
@@ -383,14 +383,21 @@ const handleVisibleChange = (visible: boolean, type: 'parent' | 'child', index?:
     fetchMaterialOptions('child', index)
   }
 
-  // 动态绑定触底滚动事件
-  nextTick(() => {
-    const popperWrap = document.querySelector('.bom-loadmore-popper:not(.is-hidden) .el-select-dropdown__wrap') as HTMLElement;
+  // 延迟 50ms 等待弹窗 DOM 完全渲染
+  setTimeout(() => {
+    // 动态拼接精确的选择器
+    const exactSelector = type === 'parent'
+      ? '.parent-popper .el-select-dropdown__wrap'
+      : `.child-popper-${index} .el-select-dropdown__wrap`;
+
+    const popperWrap = document.querySelector(exactSelector) as HTMLElement;
+
     if (popperWrap) {
-      // 先解绑可能存在的旧事件，防止重复触发
+      // 解绑旧事件，防止重复触发
       if ((popperWrap as any)._scrollHandler) {
         popperWrap.removeEventListener('scroll', (popperWrap as any)._scrollHandler);
       }
+
       // 定义滚动触发逻辑
       (popperWrap as any)._scrollHandler = function() {
         const { scrollTop, scrollHeight, clientHeight } = this;
@@ -399,13 +406,14 @@ const handleVisibleChange = (visible: boolean, type: 'parent' | 'child', index?:
           if (type === 'parent') {
             loadMoreParent();
           } else if (type === 'child' && index !== undefined) {
+            // 触发子件加载
             loadMoreChild(popperWrap, index);
           }
         }
       };
       popperWrap.addEventListener('scroll', (popperWrap as any)._scrollHandler);
     }
-  });
+  }, 50);
 }
 
 // ============================================================