feat(mobile-next): 工号登录与目录薄适配，并完成登录/会话/聊天/通讯录第一批界面

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

mobile-next/lib/pages/chat/chat_view.dart

@@ -3,6 +3,7 @@ import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
 import 'package:get/get.dart';
 import 'package:openim_common/openim_common.dart';
 
+import '../../company/feature_flags.dart';
 import '../../widgets/file_download_progress.dart';
 import 'chat_logic.dart';
 
@@ -222,12 +223,13 @@ class ChatPage extends StatelessWidget {
                 onCloseMultiModel: logic.exit,
                 onClickMoreBtn: logic.chatSetup,
                 onClickCallBtn: logic.call,
+                showCallBtn: FeatureFlags.livekitCall,
               ),
               body: SafeArea(
                 child: WaterMarkBgView(
                   text: '',
                   path: logic.background.value,
-                  backgroundColor: Styles.c_FFFFFF,
+                  backgroundColor: Styles.c_F0F2F6,
                   floatView: _groupCallHintView,
                   bottomView: ChatInputBox(
                     forceCloseToolboxSub: logic.forceCloseToolbox,