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

lib/pages/chat/events/image_bubble.dart

@@ -48,8 +48,6 @@ class ImageBubble extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-
     var borderRadius =
         this.borderRadius ?? BorderRadius.circular(AppConfig.borderRadius);
 
@@ -70,14 +68,7 @@ class ImageBubble extends StatelessWidget {
         Material(
           color: Colors.transparent,
           clipBehavior: Clip.hardEdge,
-          shape: RoundedRectangleBorder(
-            borderRadius: borderRadius,
-            side: BorderSide(
-              color: event.messageType == MessageTypes.Sticker
-                  ? Colors.transparent
-                  : theme.dividerColor,
-            ),
-          ),
+          shape: RoundedRectangleBorder(borderRadius: borderRadius),
           child: InkWell(
             onTap: onTap,
             borderRadius: borderRadius,