fix(ui): use correct theme color for unread indicator button (#2382)

Author: xsahil03x

packages/stream_chat_flutter/CHANGELOG.md

@@ -8,6 +8,8 @@
 🐞 Fixed
 
 - Fixed `.replaceMentions` not escaping special characters in the username.
+- Fixed unread indicator button using hardcoded white color instead of theme color
+  `colorTheme.barsBg`. [[#2366]](https://github.com/GetStream/stream-chat-flutter/issues/2366)
 - Fixed `GradientAvatars` for users with same-length IDs would have identical
   colors. [[#2369]](https://github.com/GetStream/stream-chat-flutter/issues/2369)
 

packages/stream_chat_flutter/lib/src/message_list_view/unread_indicator_button.dart

@@ -92,15 +92,15 @@ class UnreadIndicatorButton extends StatelessWidget {
                     context.translations.unreadCountIndicatorLabel(
                       unreadCount: unreadCount,
                     ),
-                    style: textTheme.body.copyWith(color: Colors.white),
+                    style: textTheme.body.copyWith(color: colorTheme.barsBg),
                   ),
                   const SizedBox(width: 12),
                   IconButton(
                     iconSize: 24,
                     icon: const SvgIcon(StreamSvgIcons.close),
                     padding: const EdgeInsets.all(4),
                     style: IconButton.styleFrom(
-                      foregroundColor: Colors.white,
+                      foregroundColor: colorTheme.barsBg,
                       minimumSize: const Size.square(24),
                       tapTargetSize: MaterialTapTargetSize.shrinkWrap,
                     ),