Add more placeholder components and some mocks

web/stories/ChatTextField.stories.tsx

@@ -2,11 +2,16 @@ import React from 'react';
 import { ComponentStory, ComponentMeta } from '@storybook/react';
 import { RecoilRoot } from 'recoil';
 import ChatTextField from '../components/chat/ChatTextField/ChatTextField';
+import Mock from './assets/mocks/chatinput-mock.png';
 
 export default {
   title: 'owncast/Chat/Input text field',
   component: ChatTextField,
   parameters: {
+    design: {
+      type: 'image',
+      url: Mock,
+    },
     docs: {
       description: {
         component: `