fix(通知): 优化BLE媒体服务的通知配置

修复通知渠道重复创建的问题并完善通知设置
使用应用图标作为通知图标
添加通知的持续显示和静默设置

local_plugins/agent_service/android/src/main/kotlin/com/yunqiinnovation/agent_service/BleMediaService.kt

@@ -413,7 +413,7 @@ private var companionManager: BleCompanionManager? = null
         // 设置服务状态
         isRunning.set(true)
         startForeground(NOTIFICATION_ID, createNotification())
-           // 初始化BLE伴侣设备管理器 - 使用单例模式获取实例
+        // 初始化BLE伴侣设备管理器 - 使用单例模式获取实例
         companionManager = BleCompanionManager.getInstance(this)
         // 初始化蓝牙监听器
         initializeBluetoothListener()
@@ -850,12 +850,20 @@ private var companionManager: BleCompanionManager? = null
 
         // Android 8.0+ 需要创建通知渠道
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            val channel = NotificationChannel(
-                CHANNEL_ID,
-                "语音助手代理服务",
-                NotificationManager.IMPORTANCE_LOW
-            )
-            manager.createNotificationChannel(channel)
+            val existingChannel = manager.getNotificationChannel(CHANNEL_ID)
+            if (existingChannel == null) {
+                val channel = NotificationChannel(
+                    CHANNEL_ID,
+                    "Voice assistant agent",
+                    NotificationManager.IMPORTANCE_LOW
+                )
+                channel.description = "Voice assistant agent"
+                channel.setShowBadge(false)
+                channel.enableLights(false)
+                channel.enableVibration(false)
+                channel.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
+                manager.createNotificationChannel(channel)
+            }
         }
 
         // 点击通知打开主界面
@@ -873,15 +881,22 @@ private var companionManager: BleCompanionManager? = null
             null
         }
 
+        val appIconResId = applicationInfo.icon.takeIf { it != 0 } ?: android.R.drawable.ic_dialog_info
+
         // 构建通知
         val builder = NotificationCompat.Builder(this, CHANNEL_ID)
             .setContentTitle("Voitrans")
-            .setContentText("语音助手代理服务运行中")
-            .setSmallIcon(android.R.drawable.ic_dialog_info)
+            .setContentText("Voice assistant agent is running")
+            .setSmallIcon(appIconResId)
+            .setOngoing(true)
+            .setOnlyAlertOnce(true)
+            .setCategory(NotificationCompat.CATEGORY_SERVICE)
+            .setPriority(NotificationCompat.PRIORITY_LOW)
+            .setShowWhen(false)
             
         // 设置点击意图
         pendingIntent?.let { builder.setContentIntent(it) }
         
         return builder.build()
     }
-}
+}