Revert "fix(语音识别): 修复从蓝牙唤醒模式切换时编码器未关闭的问题"

This reverts commit e3f0f9bccd.

local_plugins/agent_service/ios/agent_service/Sources/agent_service/AgentServiceImpl.swift

@@ -103,7 +103,6 @@ class AgentServiceImpl: NSObject {
     private let maxIdleSeconds: TimeInterval = 5
      var micCapture: MicrophoneCapture!
     // 语音识别模式
-    private var lastRecognitionMode: String = "normal"
     public var currentRecognitionMode: String = "normal"
    // 识别结果
     private var recognitionResult = ""
@@ -509,11 +508,6 @@ class AgentServiceImpl: NSObject {
                 return false
             }
         } 
-        lastRecognitionMode = currentRecognitionMode
-        if (lastRecognitionMode == "ble_wakeup" && mode != "ble_wakeup"){//之前是唤醒模式，现在不是唤醒模式
-            os_log("liwei------- 关闭唤醒通道", log: logger, type: .info)
-            BleService.shared.closeCodec()
-        }
         stopRecognition()
         if isAiStreaming {
             isAiStreaming = false
@@ -535,6 +529,13 @@ class AgentServiceImpl: NSObject {
         os_log("liwei--------------- 设置语音识别模式: %{public}@", log: logger, type: .info, mode)
 
         let audioSourceType: AzureAsrHelper.AudioSourceType = useBle ? .external : .microphone
+
+        if useBle {
+           // AudioSessionHub.shared.begin(.playback)
+        } else {
+            //AudioSessionHub.shared.begin(.voice)
+        }
+        
         // 新增：标记为"启动中"，用于允许 stop 在启动未完成时也能生效
         isStartingRecognition = true