fix(mobile-next): 把加载、失败、断网接到真实 SDK 与目录请求

会话列表、通讯录、好友申请、添加同事页覆盖 CompanyLoadingView/CompanyFailView；
主页断网横幅跟随 IMSdkStatus.connectionFailed。不伪造状态。

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

mobile-next/lib/pages/home/home_logic.dart

@@ -24,6 +24,7 @@ class HomeLogic extends SuperController {
   final unhandledFriendApplicationCount = 0.obs;
   final unhandledGroupApplicationCount = 0.obs;
   final unhandledCount = 0.obs;
+  final isOffline = false.obs;
   String? _lockScreenPwd;
   bool _isShowScreenLock = false;
   bool? _isAutoLogin;
@@ -50,7 +51,8 @@ class HomeLogic extends SuperController {
 
   void getUnhandledFriendApplicationCount() async {
     var i = 0;
-    var list = await OpenIM.iMManager.friendshipManager.getFriendApplicationListAsRecipient();
+    var list = await OpenIM.iMManager.friendshipManager
+        .getFriendApplicationListAsRecipient();
     var haveReadList = DataSp.getHaveReadUnHandleFriendApplication();
     haveReadList ??= <String>[];
     for (var info in list) {
@@ -65,7 +67,8 @@ class HomeLogic extends SuperController {
 
   void getUnhandledGroupApplicationCount() async {
     var i = 0;
-    var list = await OpenIM.iMManager.groupManager.getGroupApplicationListAsRecipient();
+    var list = await OpenIM.iMManager.groupManager
+        .getGroupApplicationListAsRecipient();
     var haveReadList = DataSp.getHaveReadUnHandleGroupApplication();
     haveReadList ??= <String>[];
     for (var info in list) {
@@ -101,7 +104,12 @@ class HomeLogic extends SuperController {
       if (value.status == IMSdkStatus.syncStart) {
         _getRTCInvitationStart();
       }
+      isOffline.value = value.status == IMSdkStatus.connectionFailed;
     });
+    final lastStatus = imLogic.imSdkStatusSubject.values.lastOrNull;
+    if (lastStatus != null) {
+      isOffline.value = lastStatus.status == IMSdkStatus.connectionFailed;
+    }
 
     Apis.kickoffController.stream.listen((event) {
       DataSp.removeLoginCertificate();