fix: output code too long break ui (#320)

web/app/styles/markdown.scss

@@ -743,13 +743,14 @@
 
 .markdown-body pre code {
   font-size: 100%;
+  white-space: pre-wrap !important;
 }
 
 .markdown-body pre>code {
   padding: 0;
   margin: 0;
   word-break: normal;
-  white-space: pre;
+  white-space: pre-wrap;
   background: transparent;
   border: 0;
 }