🐛[InputNumber]修改样式，解决 addAfter设置文本后，文本折行的问题

Author: liyuan-meng

src/components/input-number/demos/complex.md

@@ -19,7 +19,7 @@ export default function InputDemo() {
       <h5>后置</h5>
       <div style={{ display: 'flex', gap: 10, flexWrap: 'wrap' }}>
         <InputNumber style={{ width: 200 }} placeholder="请输入" size="large" noStep addonAfter="分" />
-        <InputNumber style={{ width: 200 }} placeholder="请输入" noStep addonAfter="次" />
+        <InputNumber style={{ width: 200 }} placeholder="请输入" noStep addonAfter="积分/次" />
         <InputNumber style={{ width: 200 }} placeholder="请输入" size="small" noStep addonAfter="份" />
       </div>
       <h5>前置</h5>

src/components/input-number/index.less

@@ -258,6 +258,7 @@
       }
 
       .@{input-number-prefix-cls} {
+        flex: 1;
         border-radius: 0 2px 2px 0;
       }
     }
@@ -269,6 +270,7 @@
       }
 
       .@{input-number-prefix-cls} {
+        flex: 1;
         border-radius: 2px 0 0 2px;
       }
     }