feat(chat): Cheatroom layouts and API data load

lib/presentation/chat/chat_screen/bloc/chat_state.dart

@@ -3,8 +3,26 @@
 part of 'chat_bloc.dart';
 
 /// Represents the state of Chat in the application.
+///
+
 class ChatState extends Equatable {
   ChatState({
+    this.chatModelObj,
+  });
+
+  ChatModel? chatModelObj;
+
+  @override
+  List<Object?> get props => [chatModelObj];
+  ChatState copyWith({ChatModel? chatModelObj}) {
+    return ChatState(
+      chatModelObj: chatModelObj ?? this.chatModelObj,
+    );
+  }
+}
+
+class ChatLoadedState extends ChatState {
+  ChatLoadedState({
     this.selectedDropDownValue,
     this.chatModelObj,
   });
@@ -23,9 +41,21 @@ class ChatState extends Equatable {
     ChatModel? chatModelObj,
   }) {
     return ChatState(
-      selectedDropDownValue:
-          selectedDropDownValue ?? this.selectedDropDownValue,
       chatModelObj: chatModelObj ?? this.chatModelObj,
     );
   }
 }
+
+class ChatErrorState extends ChatState {
+  final String errorMessage;
+
+  ChatErrorState(this.errorMessage);
+
+  @override
+  List<Object> get props => [errorMessage];
+}
+
+class ChatInitialState extends ChatState {
+  ChatInitialState({required ChatModel chatModelObj})
+      : super(chatModelObj: chatModelObj);
+}