Fix Bug #426: 门诊医生站-检查开立：已选择列表应支持树形展开，显示套餐明细（项目/数量/单价）

根因: loadPackageDetails 函数中 res.code === 200 判断永远为 false（Axios 拦截
器已对 code===200 解包返回 res.data，解包后对象不含 code 字段），导致树形表格懒加
载套餐明细永远返回空数组。handleItemSelect 中 hasChildren 只判断了 packageId 但数据
库 check_part 表只有 package_name 无 package_id，导致套餐项无展开箭头。

修复:
1. loadPackageDetails 去掉 res.code 检查，直接用 parsePackageDetailsPayload 解析
   （与 loadPackageDetailsForItem 保持一致）
2. handleItemSelect hasChildren 增加 || item.packageName 条件

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue

@@ -584,20 +584,16 @@ async function loadPackageDetails(row, treeNode, resolve) {
       url: `/system/check-type/package/${row.packageId}/details`,
       method: 'get'
     });
-    if (res.code === 200) {
-      const list = parsePackageDetailsPayload(res);
-      const children = list.map((child) => ({
-        ...child,
-        name: child.name || child.itemName,
-        unit: child.unit || '次',
-        price: child.price ?? child.unitPrice ?? child.itemPrice ?? 0,
-        quantity: row.quantity || 1,
-        isPackageDetail: true
-      }));
-      resolve(children);
-    } else {
-      resolve([]);
-    }
+    const list = parsePackageDetailsPayload(res);
+    const children = list.map((child) => ({
+      ...child,
+      name: child.name || child.itemName,
+      unit: child.unit || '次',
+      price: child.price ?? child.unitPrice ?? child.itemPrice ?? 0,
+      quantity: row.quantity || 1,
+      isPackageDetail: true
+    }));
+    resolve(children);
   } catch (err) {
     console.error('加载套餐明细失败:', err);
     resolve([]);
@@ -1489,7 +1485,7 @@ async function handleItemSelect(checked, item, cat) {
       packageName: item.packageName || null,
       packageDetailsLoading: false,
       packageId: item.packageId || null,
-      hasChildren: !!(item.packageId)  // #426修复: 树形表格懒加载展开标记
+      hasChildren: !!(item.packageId || item.packageName)  // #426修复: 树形表格懒加载展开标记，支持 packageName 解析
     };
     selectedItems.value.push(newRow);
     // 必须用数组里的响应式行，不能继续改局部 newRow：push 后列表内是 proxy，改 raw 对象不会触发右侧卡片更新（会一直卡在「加载中」）