fix: 在空闲检测逻辑中添加TTS状态检查

防止机器人在语音播报时触发空闲问候，避免语音重叠

app/src/main/java/com/example/lzwcai_terminal_temi/MainActivity.kt

@@ -102,6 +102,7 @@ class MainActivity : AppCompatActivity(), OnRobotReadyListener, TtsListener, OnG
     private var autoRechargeJob: Job? = null
     private var latestYaw: Float? = null
     private var receptionAnchorYaw: Float? = null
+    private var isTtsSpeaking: Boolean = false
     private var pendingReceptionReturnWorkflow: Boolean = false
     private var lastWorkflowConfigRefreshAt: Long = 0L
     private lateinit var telemetryManager: TelemetryManager
@@ -340,6 +341,7 @@ class MainActivity : AppCompatActivity(), OnRobotReadyListener, TtsListener, OnG
         connectionCoordinator.handleTtsStatusChange(ttsRequest)
         when (ttsRequest.status) {
             TtsRequest.Status.STARTED -> {
+                isTtsSpeaking = true
                 Log.i("MainActivity", "TTS started")
                 binding.animatedEmojiView.currentExpression = AnimatedEmojiView.Expression.TALKING
                 liveKitManager?.setTtsMute(true)
@@ -347,6 +349,7 @@ class MainActivity : AppCompatActivity(), OnRobotReadyListener, TtsListener, OnG
             TtsRequest.Status.COMPLETED, 
             TtsRequest.Status.CANCELED,
             TtsRequest.Status.NOT_ALLOWED -> {
+                isTtsSpeaking = false
                 Log.i("MainActivity", "TTS finished: ${ttsRequest.speech}")
                 if (taskController.currentTask == "patrol") {
                     binding.animatedEmojiView.currentExpression = AnimatedEmojiView.Expression.ANGRY
@@ -356,6 +359,7 @@ class MainActivity : AppCompatActivity(), OnRobotReadyListener, TtsListener, OnG
                 liveKitManager?.setTtsMute(false)
             }
             TtsRequest.Status.ERROR -> {
+                isTtsSpeaking = false
                 Log.e("MainActivity", "TTS error: ${ttsRequest.speech}")
                 binding.animatedEmojiView.currentExpression = AnimatedEmojiView.Expression.SAD
                 liveKitManager?.setTtsMute(false)
@@ -518,7 +522,7 @@ class MainActivity : AppCompatActivity(), OnRobotReadyListener, TtsListener, OnG
                 }
             }
         }
-        if (isIdleTask && !atHomeBase && state == DETECTED && !isSpecialState) {
+        if (isIdleTask && !atHomeBase && state == DETECTED && !isSpecialState && !isTtsSpeaking) {
             val hour = java.util.Calendar.getInstance().get(java.util.Calendar.HOUR_OF_DAY)
             val greeting = when (hour) {
                 in 6..11 -> "早上好"