修正ts类型

src/views/system/statistics/Payment/index.vue

@@ -93,6 +93,8 @@ import Echarts from '@/components/Echarts/index.vue';
 import { EChartsOption } from 'echarts';
 import { getLast7Days, getLastNDays } from '@/utils/time';
 
+const date = ref('');
+
 /** 入住情况 */
 const options = shallowRef<EChartsOption>({
   tooltip: { show: false },