chat: disallow markdown nodes

Using RemarkBreaks and RemarkDisableTokenizers breaks one or
the other in simultaneous use.

We fall back to escaping markdown tokens we don't want.

pkg/interface/src/views/apps/chat/components/ChatMessage.tsx

@@ -292,7 +292,8 @@ export const MessageContent = ({ content, contacts, measure, fontSize, group })
           }}
           textProps={{style: {
             fontSize: 'inherit',
-            textDecoration: 'underline'
+            borderBottom: '1px solid',
+            textDecoration: 'none'
           }}}
         />
       </Box>

pkg/interface/src/views/apps/chat/components/content/text.js

@@ -53,6 +53,9 @@ const MessageMarkdown = React.memo(props => (
     {...props}
     unwrapDisallowed={true}
     renderers={renderers}
+    // shim until we uncover why RemarkBreaks and
+    // RemarkDisableTokenizers can't be loaded simultaneously
+    disallowedTypes={['heading', 'list', 'listItem']}
     allowNode={(node, index, parent) => {
       if (
         node.type === 'blockquote'
@@ -67,11 +70,7 @@ const MessageMarkdown = React.memo(props => (
 
       return true;
     }}
-    plugins={[[
-      RemarkBreaks,
-      RemarkDisableTokenizers,
-      { block: DISABLED_BLOCK_TOKENS, inline: DISABLED_INLINE_TOKENS }
-    ]]} />
+    plugins={[RemarkBreaks]} />
 ));