feat: suporte a tabelas markdown nas legendas, remoção de borda de imagens e separação de comentários no mural

lib/pages/chat/send_file_dialog.dart

@@ -7,7 +7,7 @@ import 'package:async/async.dart' show Result;
 import 'package:cross_file/cross_file.dart';
 import 'package:cupertino_ui/cupertino_ui.dart';
 import 'package:html/parser.dart' show parseFragment;
-import 'package:markdown/markdown.dart' show markdownToHtml;
+import 'package:markdown/markdown.dart' show ExtensionSet, markdownToHtml;
 import 'package:tatchat/config/app_config.dart';
 import 'package:tatchat/config/setting_keys.dart';
 import 'package:tatchat/l10n/l10n.dart';
@@ -133,7 +133,10 @@ class SendFileDialogState extends State<SendFileDialog> {
             ? null
             : () {
                 final extra = <String, Object>{'body': label};
-                final html = markdownToHtml(label);
+                final html = markdownToHtml(
+                  label,
+                  extensionSet: ExtensionSet.gitHubFlavored,
+                );
                 if (parseFragment(html).text != label) {
                   extra['format'] = 'org.matrix.custom.html';
                   extra['formatted_body'] = html;