Fix Bug #492: 【门诊手术安排】关闭"手术计费"主弹窗后，项目字典选择列表依然残留悬浮在界面上

在 prescriptionlist 组件中新增 closeAllPopovers 方法，关闭手术计费弹窗时
先关闭所有行悬浮的项目字典下拉弹窗，避免主弹窗关闭后残留

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

openhis-ui-vue3/src/views/clinicmanagement/bargain/component/prescriptionlist.vue

@@ -1146,7 +1146,13 @@ function calculateTotalPrice(row, index) {
   });
 }
 
-defineExpose({ getListInfo });
+function closeAllPopovers() {
+  prescriptionList.value.forEach(row => {
+    row.showPopover = false;
+  });
+}
+
+defineExpose({ getListInfo, closeAllPopovers });
 </script>
     
 <style lang="scss" scoped>