fix: json editor style issue

Signed-off-by: ryjiang <jiangruiyi@gmail.com>

client/src/pages/play/JSONEditor.tsx

@@ -13,6 +13,7 @@ import { getCMStyle } from './style';
 
 const EditorContainer = styled('div')({
   height: '100%',
+  width: '100%',
   overflow: 'auto',
   '& .cm-editor': {
     height: '100%',