数据库文档编写，开发规范文档，数据库接入

pages/mall/analytics/sales-report.uvue

@@ -1,5 +1,5 @@
 <template>
-  <view class="page" @click="closeMoreMenu">
+  <view class="page" @click.self="closeMoreMenu">
     <!-- 固定顶部导航栏 -->
     <AnalyticsTopBar 
       :title="'销售报表'"
@@ -277,6 +277,9 @@ async function loadSalesData() {
 
 function selectPeriod(p: string) {
   selectedPeriod.value = p
+  customRangeEnabled.value = false
+  selectedStartDate.value = ''
+  selectedEndDate.value = ''
   loadSalesData()
 }