refactor(SensorScaleUtils): 优化重量读取逻辑

- 移除状态字符串转换的日志代码
- 简化稳定状态判断逻辑，移除重复的lastWeight比较
- 将重量单位转换提取为独立变量，提高代码可读性
- 保持原有的回调机制和重量单位转换功能

app/src/main/java/com/sw/dualscreen/sdk/SensorScaleUtils.kt

@@ -31,21 +31,24 @@ object SensorScaleUtils {
              * 读取重量
              */
             override fun readWeight(state: Int, value: Double) {
-                val stateStr = when (state) {
-                    SensorScale.STATE_STABLE -> "稳定"
-                    SensorScale.STATE_UNSTABLE -> "不稳定"
-                    SensorScale.STATE_OVER_WEIGHT -> "量程溢出"
-                    else -> "未知"
-                }
+//                val stateStr = when (state) {
+//                    SensorScale.STATE_STABLE -> "稳定"
+//                    SensorScale.STATE_UNSTABLE -> "不稳定"
+//                    SensorScale.STATE_OVER_WEIGHT -> "量程溢出"
+//                    else -> "未知"
+//                }
 //                Log.d(TAG, "readWeight state = ${stateStr}, weight = $value")
                 // 只使用稳定值
-                if (state == SensorScale.STATE_STABLE && lastWeight != value) {
-                    lastWeight = value
-                    callback?.invoke(value)
-                }
+                if (state == SensorScale.STATE_STABLE) {
+                    if (lastWeight != value) {
+                        lastWeight = value
+                        callback?.invoke(value)
+                    }
 
-                weightCallbackList.forEach {
-                    it.invoke((value * 1000).roundToInt())
+                    weightCallbackList.forEach {
+                        val currentWeight = value * 1000
+                        it.invoke(currentWeight.roundToInt())
+                    }
                 }
             }