fixed chat bubble link styling and gesture handling, and added android package visibility for common schemes

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

@@ -205,6 +205,18 @@ class _ChatBubbleState extends State<ChatBubble>
     onRefetch: widget.refetch,
   );
 
+  /// True only for messages whose body has a meaningful tap action (poll
+  /// dialog or file download/cancel). For plain text messages we leave
+  /// `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.
+  bool get _hasTapAction {
+    final obj = message.originalData?['object'];
+    if (obj?.type == RichObjectStringObjectType.talkPoll) return true;
+    return message.file != null;
+  }
+
   void _onTap() {
     final obj = message.originalData?['object'];
     if (obj?.type == RichObjectStringObjectType.talkPoll) {
@@ -302,7 +314,7 @@ class _ChatBubbleState extends State<ChatBubble>
           },
           onLongPress: _showOptionsDialog,
           onDoubleTap: _showOptionsDialog,
-          onTap: _onTap,
+          onTap: _hasTapAction ? _onTap : null,
           child: Transform.translate(
             offset: _position,
             child: Bubble(