feat(mobile-next): 迁移 Android 一对一语音通话薄适配与入口

复用官方 OpenIMLive 信令与房间，换票改走账号服务 /api/rtc_token；入口仅音频，占线/超时/重复回调与销毁释放由公司层防护。

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

mobile-next/openim_live/lib/src/pages/single/room.dart

@@ -43,50 +43,59 @@ class _SingleRoomViewState extends SignalState<SingleRoomView> {
 
   @override
   void dispose() {
-    // always dispose listener
-    (() async {
-      _room?.removeListener(_onRoomDidUpdate);
-      await _listener?.dispose();
-      await _room?.remoteParticipants.values.firstOrNull?.dispose();
-      await _room?.localParticipant?.dispose();
-      await _room?.disconnect();
-      await _room?.dispose();
-    })();
+    final room = _room;
+    final listener = _listener;
+    _room = null;
+    _listener = null;
+    room?.removeListener(_onRoomDidUpdate);
+    () async {
+      await listener?.dispose();
+      await room?.remoteParticipants.values.firstOrNull?.dispose();
+      await room?.localParticipant?.dispose();
+      await room?.disconnect();
+      await room?.dispose();
+    }();
     super.dispose();
   }
 
   @override
   Future<void> connect() async {
-    final url = certificate.liveURL!;
-    final token = certificate.token!;
+    final url = certificate.liveURL;
+    final token = certificate.token;
+    if (url == null || url.isEmpty || token == null || token.isEmpty) {
+      widget.onError?.call(StateError('missing livekit credential'), StackTrace.current);
+      widget.onClose?.call();
+      return;
+    }
     final busyLineUsers = certificate.busyLineUserIDList ?? [];
     if (busyLineUsers.isNotEmpty) {
       widget.onBusyLine?.call();
       widget.onClose?.call();
       return;
     }
-    // Try to connect to a room
-    // This will throw an Exception if it fails for any reason.
     try {
-      //create new room
-      _room = Room();
+      _room = Room(
+        roomOptions: const RoomOptions(
+          dynacast: true,
+          adaptiveStream: true,
+          defaultCameraCaptureOptions: CameraCaptureOptions(params: VideoParametersPresets.h720_169),
+          defaultVideoPublishOptions: VideoPublishOptions(
+            simulcast: true,
+            videoCodec: 'VP9',
+            videoEncoding: VideoEncoding(
+              maxBitrate: 5 * 1000 * 1000,
+              maxFramerate: 15,
+            ),
+          ),
+        ),
+      );
 
-      // Create a Listener before connecting
       _listener = _room?.createListener();
-      // Try to connect to the room
-      // This will throw an Exception if it fails for any reason.
-      await _room?.connect(url, token,
-          roomOptions: RoomOptions(
-              dynacast: true,
-              adaptiveStream: true,
-              defaultCameraCaptureOptions: const CameraCaptureOptions(params: VideoParametersPresets.h720_169),
-              defaultVideoPublishOptions: VideoPublishOptions(
-                  simulcast: true,
-                  videoCodec: 'VP9',
-                  videoEncoding: const VideoEncoding(
-                    maxBitrate: 5 * 1000 * 1000,
-                    maxFramerate: 15,
-                  ))));
+      await _room?.connect(
+        url,
+        token,
+        connectOptions: const ConnectOptions(autoSubscribe: true),
+      );
       if (!mounted) return;
       _room?.addListener(_onRoomDidUpdate);
       if (null != _listener) _setUpListeners();
@@ -111,6 +120,12 @@ class _SingleRoomViewState extends SignalState<SingleRoomView> {
         widget.onClose?.call();
       });
     })
+    ..on<RoomAttemptReconnectEvent>((event) {
+      IMViews.showToast('通话重连中');
+    })
+    ..on<RoomReconnectedEvent>((event) {
+      IMViews.showToast('通话已恢复');
+    })
     ..on<RoomRecordingStatusChanged>((event) {})
     ..on<LocalTrackPublishedEvent>((_) => _sortParticipants())
     ..on<LocalTrackUnpublishedEvent>((_) => _sortParticipants())