feat:超市数据库

lib/common/widgets/app/app_back.dart

@@ -12,5 +12,5 @@ Widget appBack(
   return FIcon(
     FAssets.icons.chevronLeft,
     size: theme.typography.xl4.fontSize,
-  ).alignLeft().width(height).onTap(() => onTap());
+  ).center().width(height).height(height).onTap(() => onTap());
 }