fix(scan-checkin-detail): 调整扫码签到详情页底部布局适配安全区域

调整页面底部内边距至268rpx，修改固定操作栏的底部偏移值以适配移动端安全区域

 .scan-checkin-detail-page {
   min-height: 100vh;
-  padding: 0 0 240rpx;
+  padding: 0 0 268rpx;
   background: #ebeaec;
   box-sizing: border-box;
 }
@@ -127,8 +127,8 @@
   position: fixed;
   left: 24rpx;
   right: 24rpx;
-  bottom: calc(84rpx + constant(safe-area-inset-bottom));
-  bottom: calc(84rpx + env(safe-area-inset-bottom));
+  bottom: calc(52rpx + constant(safe-area-inset-bottom));
+  bottom: calc(52rpx + env(safe-area-inset-bottom));
   display: flex;
   justify-content: center;
   z-index: 20;