chore: address PR feedback

packages/stream_chat_flutter/example/lib/tutorial_part_3.dart

@@ -118,10 +118,7 @@ class ChannelListPage extends StatelessWidget {
         channel: channel,
       ),
       title: ChannelName(
-        textStyle: StreamChatTheme.of(context)
+        textStyle: ChannelPreviewTheme.of(context).titleStyle!.copyWith(
-            .channelPreviewTheme
-            .titleStyle!
-            .copyWith(
               color: StreamChatTheme.of(context)
                   .colorTheme
                   .textHighEmphasis

packages/stream_chat_flutter/lib/src/channel_header.dart

@@ -105,7 +105,7 @@ class ChannelHeader extends StatelessWidget implements PreferredSizeWidget {
   @override
   Widget build(BuildContext context) {
     final channel = StreamChannel.of(context).channel;
-    final chatThemeData = StreamChatTheme.of(context);
+    final channelHeaderTheme = ChannelHeaderTheme.of(context);
 
     final leadingWidget = leading ??
         (showBackButton
@@ -141,17 +141,17 @@ class ChannelHeader extends StatelessWidget implements PreferredSizeWidget {
             brightness: Theme.of(context).brightness,
             elevation: 1,
             leading: leadingWidget,
-            backgroundColor: chatThemeData.channelHeaderTheme.color,
+            backgroundColor: channelHeaderTheme.color,
             actions: actions ??
                 <Widget>[
                   Padding(
                     padding: const EdgeInsets.only(right: 10),
                     child: Center(
                       child: ChannelAvatar(
-                        borderRadius: chatThemeData
+                        borderRadius:
-                            .channelHeaderTheme.avatarTheme?.borderRadius,
+                            channelHeaderTheme.avatarTheme?.borderRadius,
-                        constraints: chatThemeData
+                        constraints:
-                            .channelHeaderTheme.avatarTheme?.constraints,
+                            channelHeaderTheme.avatarTheme?.constraints,
                         onTap: onImageTap,
                       ),
                     ),
@@ -168,16 +168,14 @@ class ChannelHeader extends StatelessWidget implements PreferredSizeWidget {
                   children: <Widget>[
                     title ??
                         ChannelName(
-                          textStyle:
+                          textStyle: channelHeaderTheme.titleStyle,
-                              chatThemeData.channelHeaderTheme.titleStyle,
                         ),
                     const SizedBox(height: 2),
                     subtitle ??
                         ChannelInfo(
                           showTypingIndicator: showTypingIndicator,
                           channel: channel,
-                          textStyle:
+                          textStyle: channelHeaderTheme.subtitleStyle,
-                              chatThemeData.channelHeaderTheme.subtitleStyle,
                         ),
                   ],
                 ),

packages/stream_chat_flutter/lib/src/channel_info.dart

@@ -65,7 +65,7 @@ class ChannelInfo extends StatelessWidget {
       }
       alternativeWidget = Text(
         text,
-        style: StreamChatTheme.of(context).channelHeaderTheme.subtitleStyle,
+        style: ChannelHeaderTheme.of(context).subtitleStyle,
       );
     } else {
       final userId = StreamChat.of(context).currentUser?.id;

packages/stream_chat_flutter/lib/src/channel_list_header.dart

@@ -241,12 +241,13 @@ class ChannelListHeader extends StatelessWidget implements PreferredSizeWidget {
     StreamChatClient client,
   ) {
     final chatThemeData = StreamChatTheme.of(context);
+    final channelListHeaderTheme = ChannelListHeaderTheme.of(context);
     return Row(
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
         Text(
           context.translations.offlineLabel,
-          style: chatThemeData.channelListHeaderTheme.titleStyle?.copyWith(
+          style: channelListHeaderTheme.titleStyle?.copyWith(
             fontSize: 16,
             fontWeight: FontWeight.bold,
           ),
@@ -257,7 +258,7 @@ class ChannelListHeader extends StatelessWidget implements PreferredSizeWidget {
             ..openConnection(),
           child: Text(
             context.translations.tryAgainLabel,
-            style: chatThemeData.channelListHeaderTheme.titleStyle?.copyWith(
+            style: channelListHeaderTheme.titleStyle?.copyWith(
               fontSize: 16,
               fontWeight: FontWeight.bold,
               color: chatThemeData.colorTheme.accentPrimary,

packages/stream_chat_flutter/lib/src/channel_preview.dart

@@ -183,15 +183,13 @@ class ChannelPreview extends StatelessWidget {
 
           return Text(
             stringDate,
-            style: StreamChatTheme.of(context)
+            style: ChannelPreviewTheme.of(context).lastMessageAtStyle,
-                .channelPreviewTheme
-                .lastMessageAtStyle,
           );
         },
       );
 
   Widget _buildSubtitle(BuildContext context) {
-    final chatThemeData = StreamChatTheme.of(context);
+    final channelPreviewTheme = ChannelPreviewTheme.of(context);
     if (channel.isMuted) {
       return Row(
         crossAxisAlignment: CrossAxisAlignment.end,
@@ -201,7 +199,7 @@ class ChannelPreview extends StatelessWidget {
           ),
           Text(
             '  ${context.translations.channelIsMutedText}',
-            style: chatThemeData.channelPreviewTheme.subtitleStyle,
+            style: channelPreviewTheme.subtitleStyle,
           ),
         ],
       );
@@ -209,7 +207,7 @@ class ChannelPreview extends StatelessWidget {
     return TypingIndicator(
       channel: channel,
       alternativeWidget: _buildLastMessage(context),
-      style: chatThemeData.channelPreviewTheme.subtitleStyle,
+      style: channelPreviewTheme.subtitleStyle,
     );
   }
 

packages/stream_chat_flutter/lib/src/full_screen_media.dart

@@ -124,9 +124,7 @@ class _FullScreenMediaState extends State<FullScreenMedia>
                             ),
                             backgroundDecoration: BoxDecoration(
                               color: ColorTween(
-                                begin: StreamChatTheme.of(context)
+                                begin: ChannelHeaderTheme.of(context).color,
-                                    .channelHeaderTheme
-                                    .color,
                                 end: Colors.black,
                               ).lerp(_controller.value),
                             ),

packages/stream_chat_flutter/lib/src/message_actions_modal.dart

@@ -566,8 +566,7 @@ class _MessageActionsModalState extends State<MessageActionsModal> {
       elevation: 2,
       clipBehavior: Clip.hardEdge,
       isScrollControlled: true,
-      backgroundColor:
+      backgroundColor: MessageInputTheme.of(context).inputBackgroundColor,
-          streamChatThemeData.messageInputTheme.inputBackgroundColor,
       shape: const RoundedRectangleBorder(
         borderRadius: BorderRadius.only(
           topLeft: Radius.circular(16),

packages/stream_chat_flutter/lib/src/message_list_view.dart

@@ -629,7 +629,7 @@ class _MessageListViewState extends State<MessageListView> {
         child: Text(
           context.translations.threadSeparatorText(replyCount),
           textAlign: TextAlign.center,
-          style: _streamTheme.channelHeaderTheme.subtitleStyle,
+          style: ChannelHeaderTheme.of(context).subtitleStyle,
         ),
       ),
     );

packages/stream_chat_flutter/lib/src/message_search_item.dart

@@ -122,18 +122,18 @@ class MessageSearchItem extends StatelessWidget {
       text = parts.join(' ');
     }
 
-    final chatThemeData = StreamChatTheme.of(context);
+    final channelPreviewTheme = ChannelPreviewTheme.of(context);
     return Text.rich(
       _getDisplayText(
         text!,
         message.mentionedUsers,
         message.attachments,
-        chatThemeData.channelPreviewTheme.subtitleStyle?.copyWith(
+        channelPreviewTheme.subtitleStyle?.copyWith(
           fontStyle: (message.isSystem || message.isDeleted)
               ? FontStyle.italic
               : FontStyle.normal,
         ),
-        chatThemeData.channelPreviewTheme.subtitleStyle?.copyWith(
+        channelPreviewTheme.subtitleStyle?.copyWith(
           fontStyle: (message.isSystem || message.isDeleted)
               ? FontStyle.italic
               : FontStyle.normal,