feat(call): 添加频道ID支持并更新通话状态

- 在通话控制器中将初始状态从'missed'更改为'waitCalling'
- 在IM管理器中添加channelId字段解析和传递
- 在视频通话邀请对话框中添加channelId参数
- 在视频通话页面中添加channelId参数支持
- 更新通话消息发送时包含频道ID信息

lib/controller/message/call_controller.dart

@@ -198,7 +198,7 @@ class CallController extends GetxController {
       await _sendCallMessage(
         targetUserId: targetUserId,
         callType: callTypeStr,
-        callStatus: 'missed', // 初始状态为未接听，等待对方响应
+        callStatus: 'waitCalling', // 初始状态为未接听，等待对方响应
         channelId: channelData.channelId, // 传递频道ID
         chatController: chatController,
       );

lib/im/im_manager.dart

@@ -1434,6 +1434,7 @@ class IMManager {
       Map<String, dynamic>? callInfo;
       String? callType;
       String? callStatus;
+      String? channelId;
       
       try {
         // 自定义消息
@@ -1443,6 +1444,7 @@ class IMManager {
             final params = customBody.params!;
             callType = params['callType'] ?? 'voice';
             callStatus = params['callStatus'] ?? 'missed';
+            channelId = params['channelId'] ?? '';
             callInfo = {
               'callType': callType,
               'callStatus': callStatus,
@@ -1514,6 +1516,7 @@ class IMManager {
                     Get.to(() => VideoCallPage(
                       targetUserId: fromId,
                       isInitiator: false,
+                      channelId: channelId,
                     ));
                   },
                   onAccept: () async {

lib/pages/message/video_call_page.dart

@@ -20,6 +20,7 @@ import '../../model/home/marriage_data.dart';
 class VideoCallPage extends StatefulWidget {
   final String targetUserId;
   final String? callType;
+  final String? channelId;
   final MarriageData? userData;
   final bool isInitiator; // 是否是发起方
 
@@ -27,6 +28,7 @@ class VideoCallPage extends StatefulWidget {
     super.key,
     required this.targetUserId,
     this.callType,
+    this.channelId,
     this.userData,
     this.isInitiator = true,
   });

lib/widget/message/video_call_invite_dialog.dart

@@ -8,6 +8,7 @@ class VideoCallInviteDialog extends StatelessWidget {
   final String avatarUrl;
   final String nickName;
   final String? callType;
+  final String? channelId;
   final VoidCallback? onTap; // 点击弹框主体区域（只跳转，不接通）
   final VoidCallback? onAccept; // 点击接通按钮（接通并跳转）
   final VoidCallback? onReject; // 点击挂断按钮（拒绝）
@@ -17,6 +18,7 @@ class VideoCallInviteDialog extends StatelessWidget {
     required this.avatarUrl,
     required this.nickName,
     this.callType,
+    this.channelId,
     this.onTap,
     this.onAccept,
     this.onReject,