chore: Follow up message bubble design

lib/pages/chat/events/message.dart

@@ -97,7 +97,8 @@ class Message extends StatelessWidget {
           EventTypes.Sticker,
           EventTypes.Encrypted,
         }.contains(previousEvent!.type) &&
-        previousEvent!.senderId == event.senderId;
+        previousEvent!.senderId == event.senderId &&
+        previousEvent!.originServerTs.sameEnvironment(event.originServerTs);
 
     final textColor = ownMessage
         ? Theme.of(context).colorScheme.onPrimary

lib/pages/chat/events/message_content.dart

@@ -115,7 +115,10 @@ class MessageContent extends StatelessWidget {
             );
           case MessageTypes.Sticker:
             if (event.redacted) continue textmessage;
-            return Sticker(event);
+            return Sticker(
+              event,
+              borderRadius: borderRadius,
+            );
           case CuteEventContent.eventType:
             return CuteContent(event);
           case MessageTypes.Audio:

lib/pages/chat/events/sticker.dart

@@ -9,8 +9,9 @@ import 'image_bubble.dart';
 
 class Sticker extends StatefulWidget {
   final Event event;
+  final BorderRadius borderRadius;
 
-  const Sticker(this.event, {super.key});
+  const Sticker(this.event, {required this.borderRadius, super.key});
 
   @override
   StickerState createState() => StickerState();
@@ -26,6 +27,7 @@ class StickerState extends State<Sticker> {
       width: 256,
       height: 256,
       fit: BoxFit.contain,
+      borderRadius: widget.borderRadius,
       onTap: () {
         setState(() => animated = true);
         showOkAlertDialog(