fix(grid): fix scroll to bottom header not visible (#3539)

packages/vue/src/grid/src/table/src/utils/updateStyle.ts

@@ -28,7 +28,7 @@ import GlobalConfig from '../../../config'
 
 // 计算表格整体宽高
 export function handleLayout(_vm) {
-  const { tableFullData, height, parentHeight, scrollXLoad, tableColumn } = _vm
+  const { tableFullData, height, parentHeight, scrollXLoad, scrollYLoad, tableColumn } = _vm
   let { maxHeight, minHeight, totalWidth } = _vm
   let customHeight, scaleToPx
 
@@ -67,6 +67,10 @@ export function handleLayout(_vm) {
     _vm.bodyWrapperMinHeight = minHeight
   }
 
+  if (scrollYLoad && !_vm.bodyWrapperHeight) {
+    _vm.bodyWrapperHeight = maxHeight
+  }
+
   _vm.bodyTableWidth = scrollXLoad
     ? tableColumn.reduce((previous, column) => previous + column.renderWidth, 0)
     : totalWidth