markdown support for talk messages

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

@@ -20,6 +20,7 @@ import '../../../../widget/confirm_dialog.dart';
 import '../../../../widget/debug/debug_tile.dart';
 import '../../../../widget/details_bottom_sheet.dart';
 import '../../../../widget/user_avatar.dart';
+import '../data/talk_markdown.dart';
 import '../talk_navigator.dart';
 
 class ChatTile extends StatefulWidget {
@@ -62,6 +63,18 @@ class _ChatTileState extends State<ChatTile> {
 
   void _refreshList() => context.read<ChatListBloc>().refresh();
 
+  /// One-line preview of the last message: rich-object placeholders resolved,
+  /// newlines flattened and — for Markdown messages — formatting stripped so
+  /// the list shows readable text rather than raw markers.
+  String _lastMessagePreview() {
+    final last = widget.data.lastMessage;
+    final text = RichObjectStringProcessor.parseToString(
+      last.message.replaceAll('\n', ' '),
+      last.messageParameters,
+    );
+    return last.markdown ? markdownToPlainText(text) : text;
+  }
+
   Future<void> _setCurrentAsRead() async {
     final token = widget.data.token;
     final lastId = widget.data.lastMessage.id;
@@ -142,7 +155,7 @@ class _ChatTileState extends State<ChatTile> {
       ),
       subtitle: Text(
         '${DateTime.fromMillisecondsSinceEpoch(widget.data.lastMessage.timestamp * 1000).formatRelative()}: '
-        '${RichObjectStringProcessor.parseToString(widget.data.lastMessage.message.replaceAll("\n", " "), widget.data.lastMessage.messageParameters)}',
+        '${_lastMessagePreview()}',
         overflow: TextOverflow.ellipsis,
       ),
       trailing: widget.data.unreadMessages <= 0