fix help pages

public/react/src/modules/help/Help.js

@@ -21,7 +21,14 @@ class Help extends React.Component {
     super(props);
 
     this.state = {
-      type: props.match.params.type
+      type: props.match.params.type || 'about_us'
+    }
+  }
+
+  componentDidUpdate(prevProps) {
+    console.log('update', prevProps, this.props);
+    if(prevProps.match.params.type !== this.props.match.params.type){
+      this.setState({ type: this.props.match.params.type });
     }
   }
 
@@ -35,7 +42,7 @@ class Help extends React.Component {
                 <div className="help-menu">
                   <Menu
                     mode="inline"
-                    defaultSelectedKeys={[this.state.type || 'about_us']}>
+                    selectedKeys={[this.state.type]}>
 
                     <Menu.Item key="about_us"><Link to="/help/about_us">关于我们</Link></Menu.Item>
                     <Menu.Item key="contact_us"><Link to="/help/contact_us">联系我们</Link></Menu.Item>