markdown support for talk messages

lib/view/pages/talk/widgets/chat_bubble.dart

@@ -157,7 +157,7 @@ class _ChatBubbleState extends State<ChatBubble>
   /// `onTap: null` on the bubble's `GestureDetector` so its
   /// `TapGestureRecognizer` does not enter the gesture arena — otherwise
   /// it competes with (and blocks) the per-link `TapGestureRecognizer`s
-  /// that `HighlightedLinkify` attaches to URL spans.
+  /// that `HighlightedLinkify` / the Markdown renderer attach to link spans.
   bool get _hasTapAction {
     final obj = message.originalData?['object'];
     if (obj?.type == RichObjectStringObjectType.talkPoll) return true;
@@ -280,6 +280,10 @@ class _ChatBubbleState extends State<ChatBubble>
                 messageWidget: message.getWidget(
                   highlightQuery: widget.highlightQuery,
                   style: _messageTextStyle(context),
+                  renderMarkdown:
+                      widget.bubbleData.markdown &&
+                      widget.bubbleData.messageType ==
+                          GetRoomResponseObjectMessageType.comment,
                 ),
                 parent: parent,
                 bubbleData: widget.bubbleData,