feat: review fixes

lib/src/channel_file_display_screen.dart

@@ -77,7 +77,7 @@ class _ChannelFileDisplayScreenState extends State<ChannelFileDisplayScreen> {
             ),
           ),
         ),
-        backgroundColor: StreamChatTheme.of(context).primaryColor,
+        backgroundColor: StreamChatTheme.of(context).colorTheme.white,
       ),
       body: _buildMediaGrid(),
     );

lib/src/channel_media_display_screen.dart

@@ -79,7 +79,7 @@ class _ChannelMediaDisplayScreenState extends State<ChannelMediaDisplayScreen> {
             ),
           ),
         ),
-        backgroundColor: StreamChatTheme.of(context).primaryColor,
+        backgroundColor: StreamChatTheme.of(context).colorTheme.white,
       ),
       body: _buildMediaGrid(),
     );

lib/src/image_footer.dart

@@ -621,7 +621,9 @@ class _ImageFooterState extends State<ImageFooter> {
                         icon: Transform.rotate(
                           angle: -pi / 2,
                           child: StreamSvgIcon.Icon_send_message(
-                            color: StreamChatTheme.of(context).accentColor,
+                            color: StreamChatTheme.of(context)
+                                .colorTheme
+                                .accentBlue,
                           ),
                         ),
                       ),