types(SubmitBar): add SubmitBarTextAlign type

packages/vant/src/submit-bar/README.md

@@ -127,7 +127,7 @@ export default {
 The component exports the following type definitions:
 
 ```ts
-import type { SubmitBarProps } from 'vant';
+import type { SubmitBarProps, SubmitBarTextAlign } from 'vant';
 ```
 
 ## Theming

packages/vant/src/submit-bar/README.zh-CN.md

@@ -134,7 +134,7 @@ export default {
 组件导出以下类型定义：
 
 ```ts
-import type { SubmitBarProps } from 'vant';
+import type { SubmitBarProps, SubmitBarTextAlign } from 'vant';
 ```
 
 ## 主题定制

packages/vant/src/submit-bar/SubmitBar.tsx

@@ -1,9 +1,4 @@
-import {
-  PropType,
-  CSSProperties,
-  defineComponent,
-  ExtractPropTypes,
-} from 'vue';
+import { PropType, defineComponent, ExtractPropTypes } from 'vue';
 import {
   truthProp,
   makeStringProp,
@@ -17,6 +12,8 @@ import { Button, ButtonType } from '../button';
 
 const [name, bem, t] = createNamespace('submit-bar');
 
+export type SubmitBarTextAlign = 'left' | 'right';
+
 const submitBarProps = {
   tip: String,
   label: String,
@@ -25,7 +22,7 @@ const submitBarProps = {
   loading: Boolean,
   currency: makeStringProp('¥'),
   disabled: Boolean,
-  textAlign: String as PropType<CSSProperties['textAlign']>,
+  textAlign: String as PropType<SubmitBarTextAlign>,
   buttonText: String,
   buttonType: makeStringProp<ButtonType>('danger'),
   buttonColor: String,

packages/vant/src/submit-bar/index.ts

@@ -3,4 +3,4 @@ import _SubmitBar from './SubmitBar';
 
 export const SubmitBar = withInstall(_SubmitBar);
 export default SubmitBar;
-export type { SubmitBarProps } from './SubmitBar';
+export type { SubmitBarProps, SubmitBarTextAlign } from './SubmitBar';