refactor: wrap chat bubble content in IntrinsicWidth to prevent unnecessary stretching for short messages

lib/features/support_chat/presentation/screens/support_chat_screen.dart

@@ -480,8 +480,12 @@ class _SupportChatScreenState extends ConsumerState<SupportChatScreen> {
                   color: AppColors.primaryDark.withValues(alpha: 0.1),
                 ),
         ),
+        // IntrinsicWidth shrinks the bubble to the widest child (content or
+        // time), so short messages like "hi" don't stretch to maxWidth.
+        child: IntrinsicWidth(
           child: Column(
             crossAxisAlignment: CrossAxisAlignment.start,
+            mainAxisSize: MainAxisSize.min,
             children: [
               if (!isOwn)
                 const Padding(
@@ -522,6 +526,7 @@ class _SupportChatScreenState extends ConsumerState<SupportChatScreen> {
             ],
           ),
         ),
+      ),
     );
   }