Minor refactor & rename

lib/main.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:frosty/providers/authentication_provider.dart';
-import 'package:frosty/widgets/channel_list.dart';
+import 'package:frosty/screens/channel_list.dart';
 import 'package:provider/provider.dart';
 
 void main() {

lib/widgets/channel_card.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:frosty/models/channel.dart';
-import 'package:frosty/views/chat_view.dart';
+import 'package:frosty/screens/chat.dart';
 
 /// A card widget that displays a live channel's thumbnail and details.
 class ChannelCard extends StatelessWidget {

lib/widgets/chat_message.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/widgets.dart';
 
 class ChatMessage extends StatelessWidget {
-  List<InlineSpan> children;
+  final List<InlineSpan> children;
 
   ChatMessage({Key? key, required this.children}) : super(key: key);