fix(mobile-next): 按 B-91 收口 Android 通话视觉打回项

呼出/通话中按钮、计时器、底色、60s 未接与进出场动效对齐视觉规范。

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

mobile-next/lib/core/controller/im_controller.dart

@@ -12,6 +12,7 @@ import 'package:openim_live/openim_live.dart';
 import '../../company/feature_flags.dart';
 import '../../company/rtc/call_permissions.dart';
 import '../../company/rtc/call_session_guard.dart';
+import '../../company/rtc/livekit_call_config.dart';
 import '../../company/rtc/rtc_token_api.dart';
 import '../im_callback.dart';
 
@@ -19,7 +20,7 @@ class IMController extends GetxController with IMCallback, OpenIMLive {
   late Rx<UserFullInfo> userInfo;
   late String atAllTag;
   final _rtcTokenApi = RtcTokenApi();
-  final callGuard = CallSessionGuard();
+  final callGuard = CallSessionGuard(inviteTimeout: LiveKitCallConfig.inviteTimeout);
 
   @override
   void onClose() {