fix(device-common-card): render condition

src/components/device-page/device-card/current-diag-card/device-common-card.vue

@@ -8,11 +8,13 @@ const props = defineProps<{
 
 const { commonInfo } = toRefs(props);
 
+const cardShow = computed(() => !!commonInfo.value && Object.keys(commonInfo.value).length > 0);
+
 const commonInfoEntries = computed(() => Object.entries(commonInfo.value ?? {}));
 </script>
 
 <template>
-  <NCard v-if="commonInfo" size="small" hoverable>
+  <NCard v-if="cardShow" size="small" hoverable>
     <template #header>
       <div>设备信息</div>
     </template>