fix：修复重连状态与认证流程关键缺陷

scenes/Maps/BaseLevel.gd

@@ -61,8 +61,12 @@ var _player_spawned: bool = false # Track if local player has been spawned
 var _local_player: Node = null # Reference to the local player node
 var _position_update_timer: float = 0.0 # Throttle timer for position updates
 var _current_session_id: String = "" # Cache session ID to avoid race condition on exit
+var _is_joining_session: bool = false
 const POSITION_UPDATE_INTERVAL: float = 0.125 # Send at most 8 times per second
 const PRIVATE_SCENES = ["room"] # List of scenes that should be private instances
+var _join_token_poll_interval: float = 0.5
+var _join_token_wait_timeout: float = 15.0
+var _join_player_wait_timeout_frames: int = 300
 
 func _on_session_joined(data: Dictionary):
 	# 对账远程玩家列表，使用 position.mapId 过滤
@@ -199,26 +203,51 @@ func _update_remote_player_position(user: Dictionary):
 			player.update_position(Vector2(pos.x, pos.y))
 
 func _join_session_with_player(session_id: String):
-	# 检查是否有Token，如果没有则等待
-	if LocationManager._auth_token == "":
-		# 轮询等待Token就绪 (简单重试机制)
-		await get_tree().create_timer(0.5).timeout
-		_join_session_with_player(session_id)
+	if _is_joining_session:
 		return
 
-	# 等待玩家生成完毕
-	if not _player_spawned or not _local_player:
+	_is_joining_session = true
+
+	# 检查是否有 Token，没有则轮询等待（带超时）
+	var token_wait_elapsed: float = 0.0
+	while LocationManager._auth_token == "":
+		if not is_inside_tree():
+			_is_joining_session = false
+			return
+		if token_wait_elapsed >= _join_token_wait_timeout:
+			push_warning("BaseLevel: 等待认证 Token 超时，取消加入会话 %s" % session_id)
+			_is_joining_session = false
+			return
+		await get_tree().create_timer(_join_token_poll_interval).timeout
+		token_wait_elapsed += _join_token_poll_interval
+
+	# 等待玩家生成完毕（带帧数上限）
+	var wait_frames: int = 0
+	while not _player_spawned or not _local_player:
+		if not is_inside_tree():
+			_is_joining_session = false
+			return
+		if wait_frames >= _join_player_wait_timeout_frames:
+			push_warning("BaseLevel: 等待本地玩家就绪超时，取消加入会话 %s" % session_id)
+			_is_joining_session = false
+			return
 		await get_tree().process_frame
-		_join_session_with_player(session_id)
+		wait_frames += 1
+
+	if not is_instance_valid(_local_player):
+		push_warning("BaseLevel: 本地玩家无效，取消加入会话 %s" % session_id)
+		_is_joining_session = false
 		return
 
-	var pos = _local_player.global_position if is_instance_valid(_local_player) else Vector2.ZERO
-
+	var pos = _local_player.global_position
 	LocationManager.join_session(session_id, pos)
 
 	# 进入会话后立即同步一次位置
 	await get_tree().create_timer(0.1).timeout
-	LocationManager.send_position_update(session_id, pos)
+	if is_inside_tree():
+		LocationManager.send_position_update(session_id, pos)
+
+	_is_joining_session = false
 
 func _process(delta):
 	# 发送位置更新 (节流机制)