debug: 绑定页显示MQTT连接状态，未连接时自动重连

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/xiaoqu/watch/ui/bind/BindFragment.kt

@@ -32,6 +32,7 @@ class BindFragment : BaseFragment<FragmentBindBinding>() {
     @Inject lateinit var devicePrefs: DevicePrefs
     @Inject lateinit var eventBus: EventBus
     @Inject lateinit var gson: Gson
+    @Inject lateinit var mqttManager: com.xiaoqu.watch.service.manager.MqttManager
 
     override fun createBinding(inflater: LayoutInflater, container: ViewGroup?): FragmentBindBinding {
         return FragmentBindBinding.inflate(inflater, container, false)
@@ -43,6 +44,9 @@ class BindFragment : BaseFragment<FragmentBindBinding>() {
         // 生成并显示二维码
         generateQrCode()
 
+        // 显示 MQTT 连接状态（调试用）
+        showMqttStatus()
+
         // 绑定消息由 MainActivity 统一处理（Activity 级别，不受 Fragment 生命周期影响）
         // 这里只监听用于显示 Loading 状态
         observeBindEvent()
@@ -158,4 +162,18 @@ class BindFragment : BaseFragment<FragmentBindBinding>() {
         binding.qrWrap.visibility = View.GONE
         binding.loadingWrap.visibility = View.VISIBLE
     }
+
+    /** 显示 MQTT 连接状态（调试用，确认扫码时连接是否正常） */
+    private fun showMqttStatus() {
+        val connected = mqttManager.isConnected
+        val imei = devicePrefs.imei
+        val msg = if (connected) "MQTT已连接 (IMEI=$imei)" else "MQTT未连接!"
+        android.widget.Toast.makeText(requireContext(), msg, android.widget.Toast.LENGTH_LONG).show()
+        Timber.d("绑定页: $msg")
+
+        // 未连接则尝试重连
+        if (!connected) {
+            mqttManager.connect()
+        }
+    }
 }