fix: 应急报废详情添加占位

src/views/emergency/emergency-supplies/src/components/ChangeRecord.vue

@@ -20,7 +20,7 @@
       <div class="drawer-body">
         <div class="drawer-item">
           <span class="drawer-item-label">报废理由：</span>
-          <span>{{ record?.scrapReason }}</span>
+          <span>{{ record?.scrapReason || '无' }}</span>
         </div>
         <div v-if="uploadedImages.length > 0" class="drawer-item">
           <span class="drawer-item-label">报废照片：</span>