iter(g04): dataTable 筛选框加搜索图标前缀

packages/skin/ui/src/dataTable.ts

@@ -156,6 +156,7 @@ export function dataTable<T extends { id: RowKey }>(props: DataTableProps<T>): H
 
   const filterInput = textField({
     placeholder: `筛选 ${filterKey}…`,
+    prefix: '🔍',
     disabled: props.loading, // 加载中禁止筛选，避免与在途结果竞争
     onInput: (value) => {
       table.dispatch({ type: 'setFilter', key: filterKey, value });