disable name change

src/components/UserNameForm.js

@@ -75,10 +75,10 @@ class EmailForm extends React.Component {
       <Form onSubmit={this.onSubmit}>
         <FormItem {...usernameProps.fromItem}>
           {getFieldDecorator('username', { ...usernameProps.decorator })(
-            <Input {...usernameProps.input} />,
+            <Input {...usernameProps.input} disabled/>,
           )}
           {
-            <div class="alert alert-warning" role="alert">改名开启至4月11日中午12:00。</div>
+            <div class="alert alert-warning" role="alert">改名已关闭。下次将在7月1日开启。</div>
           }
 
         </FormItem>