fix(asr): 修复语音识别连接状态管理问题

- 添加 isAsrConnecting 状态避免重复连接
- 添加 pendingStartMic 队列机制处理延迟启动
- 连接成功后自动执行等待中的麦克风启动请求
- 在错误和关闭回调中重置连接状态
- 修复未连接时直接返回导致的功能缺失

app/src/main/java/com/nova/brain/glass/helper/AsrHelper.kt

@@ -54,6 +54,8 @@ object AsrHelper : OfflineCmdListener {
     private var isConnected = false
     private var isMicRunning = false
     private var isTtsConnected = false
+    private var isAsrConnecting = false
+    private var pendingStartMic = false
 
     private const val WAKE_RESPONSE = "在呢，您请说"
     private const val LISTENING_TIMEOUT_MS = 30_000L
@@ -136,13 +138,17 @@ object AsrHelper : OfflineCmdListener {
     }
 
     private fun asrConnect() {
+        if (isConnected || isAsrConnecting) return
+        isAsrConnecting = true
         asr?.connect()
         Log.d(TAG, "ASR connect() called")
     }
 
     private fun asrStartMic() {
         if (!isConnected) {
-            Log.w(TAG, "ASR startMic ignored: not connected")
+            pendingStartMic = true
+            asrConnect()
+            Log.w(TAG, "ASR not connected, queue startMic after reconnect")
             return
         }
         if (isMicRunning) {
@@ -153,6 +159,7 @@ object AsrHelper : OfflineCmdListener {
         runCatching { asr?.startAsrWithMic() }
             .onSuccess {
                 isMicRunning = true
+                pendingStartMic = false
                 Log.d(TAG, "ASR startAsrWithMic()")
             }
             .onFailure { Log.e(TAG, "ASR startAsrWithMic failed: ${it.message}") }
@@ -261,7 +268,11 @@ object AsrHelper : OfflineCmdListener {
         asrClient.setListener(object : AsrClient.Listener {
             override fun onOpen() {
                 isConnected = true
+                isAsrConnecting = false
                 Log.d(TAG, "ASR websocket open")
+                if (pendingStartMic) {
+                    asrStartMic()
+                }
             }
 
             override fun onStart(taskId: String) {
@@ -315,12 +326,15 @@ object AsrHelper : OfflineCmdListener {
 
             override fun onError(code: Int, message: String) {
                 Log.e(TAG, "ASR error code=$code msg=$message")
+                isConnected = false
+                isAsrConnecting = false
                 isMicRunning = false
                 dismissListeningDialog()
             }
 
             override fun onClosed(code: Int, reason: String) {
                 isConnected = false
+                isAsrConnecting = false
                 isMicRunning = false
                 dismissListeningDialog()
                 Log.d(TAG, "ASR closed code=$code reason=$reason")
@@ -363,6 +377,7 @@ object AsrHelper : OfflineCmdListener {
                 return
             }
             showListeningDialog()
+            pendingStartMic = true
             if (isTtsConnected) {
                 tts?.speak(WAKE_RESPONSE)
             } else {