feat: 开始计重新增托盘信息并自动计算运抵重量

国际出港开始计重页面新增托盘数量、托盘自重输入框（自重默认18可编辑），
运抵重量自动按“地磅称重 -（托盘数量 × 托盘自重）”计算；
分托计重与完成计重提交均携带 trayNumber、trayTotalWeight；
“托盘车号”“托盘车自重”标签改为“平板车”“平板车自重”。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

module_gjc/src/main/java/com/lukouguoji/gjc/viewModel/GjcWeighingStartViewModel.kt

@@ -66,6 +66,10 @@ class GjcWeighingStartViewModel : BaseViewModel() {
 
     val pageRemark = MutableLiveData("")    // 备注
 
+    // 托盘信息（运抵重量 = 地磅称重 - 托盘数量 × 托盘自重）
+    val trayNumber = MutableLiveData("")     // 托盘数量
+    val trayWeight = MutableLiveData("18")   // 托盘自重（默认18，可编辑）
+
     // 下拉选择数据源
     val channelList = MutableLiveData<List<KeyValue>>()        // 通道号列表
     val agentList = MutableLiveData<List<KeyValue>>()          // 代理人列表
@@ -82,11 +86,10 @@ class GjcWeighingStartViewModel : BaseViewModel() {
         // 获取传入的运单ID
         maWbId = intent.getLongExtra(Constant.Key.MAWB_ID, 0)
 
-        // 监听地磅称重输入，单向同步到运抵重量
-        diBangWeight.observe(activity as LifecycleOwner) { weight ->
-            // 同步到运抵重量（单向，不做反向同步）
-            arriveWeight.value = weight ?: "0"
-        }
+        // 监听地磅称重、托盘数量、托盘自重输入，自动计算运抵重量
+        diBangWeight.observe(activity as LifecycleOwner) { recalculateArriveWeight() }
+        trayNumber.observe(activity as LifecycleOwner) { recalculateArriveWeight() }
+        trayWeight.observe(activity as LifecycleOwner) { recalculateArriveWeight() }
 
         // 监听运抵重量变化，自动计算运抵体积
         arriveWeight.observe(activity as LifecycleOwner) { weightStr ->
@@ -113,6 +116,32 @@ class GjcWeighingStartViewModel : BaseViewModel() {
         }
     }
 
+    /**
+     * 自动计算运抵重量：地磅称重 - (托盘数量 × 托盘自重)
+     */
+    private fun recalculateArriveWeight() {
+        val gross = diBangWeight.value?.toDoubleOrNull() ?: 0.0
+        val trayTotal = getTrayTotalWeight()
+        val net = gross - trayTotal
+        arriveWeight.value = if (net > 0) formatWeight(net) else "0"
+    }
+
+    /**
+     * 托盘总重量 = 托盘数量 × 托盘自重
+     */
+    private fun getTrayTotalWeight(): Double {
+        val num = trayNumber.value?.toIntOrNull() ?: 0
+        val weight = trayWeight.value?.toDoubleOrNull() ?: 0.0
+        return num * weight
+    }
+
+    /**
+     * 重量格式化：最多保留两位小数，去掉多余的0
+     */
+    private fun formatWeight(value: Double): String {
+        return String.format("%.2f", value).trimEnd('0').trimEnd('.')
+    }
+
     /**
      * 加载通道号列表 (国际出港专用)
      */
@@ -391,6 +420,10 @@ class GjcWeighingStartViewModel : BaseViewModel() {
             passageWay = this@GjcWeighingStartViewModel.channelList.value?.firstOrNull{ it.value == channel.value }?.key ?: ""
             passageWayId = this@GjcWeighingStartViewModel.channel.value
 
+            // 托盘信息
+            trayNumber = this@GjcWeighingStartViewModel.trayNumber.value?.toIntOrNull()
+            trayTotalWeight = getTrayTotalWeight()
+
             remark = pageRemark.value
         }
 
@@ -417,6 +450,8 @@ class GjcWeighingStartViewModel : BaseViewModel() {
                     arrivePc.value = ""
                     arriveWeight.value = ""
                     arriveVolume.value = ""
+                    trayNumber.value = ""
+                    trayWeight.value = "18"
 
                     pageRemark.value = ""
 
@@ -499,6 +534,8 @@ class GjcWeighingStartViewModel : BaseViewModel() {
             "goodsCn" to bean.goodsCn,
             "businessType" to bean.businessType,
             "carId" to bean.carId,
+            "trayNumber" to trayNumber.value?.toIntOrNull(),
+            "trayTotalWeight" to getTrayTotalWeight(),
             "remark" to pageRemark.value,
             "checkIn" to "1",  // 收运状态设置为已收运
             "passageWayId" to channel.value,  // 通道号参数

module_gjc/src/main/res/layout/activity_gjc_weighing_start.xml

@@ -313,7 +313,45 @@
 
                     </LinearLayout>
 
-                    <!-- 第6行：运抵件数、运抵重量、运抵体积 -->
+                    <!-- 第6行：托盘数量、托盘自重（用于自动计算运抵重量） -->
+                    <LinearLayout
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginTop="8dp"
+                        android:orientation="horizontal">
+
+                        <com.lukouguoji.module_base.ui.weight.data.layout.PadDataLayoutNew
+                            hint='@{"请输入托盘数量"}'
+                            inputType="@{android.text.InputType.TYPE_CLASS_NUMBER}"
+                            title='@{"托盘数量"}'
+                            titleLength="@{5}"
+                            type="@{DataLayoutType.INPUT}"
+                            value='@={viewModel.trayNumber}'
+                            android:layout_width="0dp"
+                            android:layout_height="wrap_content"
+                            android:layout_weight="1" />
+
+                        <com.lukouguoji.module_base.ui.weight.data.layout.PadDataLayoutNew
+                            hint='@{"请输入托盘自重"}'
+                            inputType="@{android.text.InputType.TYPE_CLASS_NUMBER | android.text.InputType.TYPE_NUMBER_FLAG_DECIMAL}"
+                            title='@{"托盘自重"}'
+                            titleLength="@{5}"
+                            type="@{DataLayoutType.INPUT}"
+                            value='@={viewModel.trayWeight}'
+                            android:layout_width="0dp"
+                            android:layout_height="wrap_content"
+                            android:layout_marginStart="15dp"
+                            android:layout_weight="1" />
+
+                        <View
+                            android:layout_width="0dp"
+                            android:layout_height="wrap_content"
+                            android:layout_marginStart="15dp"
+                            android:layout_weight="1" />
+
+                    </LinearLayout>
+
+                    <!-- 第7行：运抵件数、运抵重量、运抵体积 -->
                     <LinearLayout
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
@@ -356,7 +394,7 @@
 
                     </LinearLayout>
 
-                    <!-- 第7行：托盘车号、托盘车自重、业务类型 -->
+                    <!-- 第8行：平板车、平板车自重、业务类型 -->
                     <LinearLayout
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
@@ -364,9 +402,9 @@
                         android:orientation="horizontal">
 
                         <com.lukouguoji.module_base.ui.weight.data.layout.PadDataLayoutNew
-                            hint='@{"请输入托盘车号"}'
+                            hint='@{"请输入平板车号"}'
                             setRefreshCallBack="@{viewModel::onCarIdInputComplete}"
-                            title='@{"托盘车号"}'
+                            title='@{"平 板 车"}'
                             titleLength="@{5}"
                             type="@{DataLayoutType.INPUT}"
                             value='@={viewModel.maWbBean.carId}'
@@ -376,7 +414,7 @@
 
                         <com.lukouguoji.module_base.ui.weight.data.layout.PadDataLayoutNew
                             enable="@{false}"
-                            title='@{"托盘车自重"}'
+                            title='@{"平板车自重"}'
                             titleLength="@{5}"
                             type="@{DataLayoutType.INPUT}"
                             value='@{viewModel.carWeight}'
@@ -399,7 +437,7 @@
 
                     </LinearLayout>
 
-                    <!-- 第8行：备注 -->
+                    <!-- 第9行：备注 -->
                     <com.lukouguoji.module_base.ui.weight.data.layout.PadDataLayoutNew
                         hint='@{"请输入备注"}'
                         inputHeight="@{80}"