fix: 国际进港舱单新增/编辑页航程不再随始发站目的站联动

航程改为仅由航班信息决定：航班查询成功取航班起始站-目的站，
编辑模式取舱单 fdep-fdest，从列表页带入时取传入的航班始发/目的站；
用户手动修改始发站、目的站时航程保持不变

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

module_gjj/src/main/java/com/lukouguoji/gjj/viewModel/GjjManifestAddViewModel.kt

@@ -2,7 +2,6 @@ package com.lukouguoji.gjj.viewModel
 
 import android.content.Intent
 import android.view.View
-import androidx.lifecycle.MediatorLiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
 import androidx.recyclerview.widget.RecyclerView
@@ -103,10 +102,12 @@ class GjjManifestAddViewModel : BaseViewModel(), IOnItemClickListener {
                     fid = flight.fid.noNull()
                     departure.value = flight.fdep.noNull()
                     destination.value = flight.fdest.noNull()
+                    range.value = flight.getHangCheng()
                 } else {
                     fid = ""
                     departure.value = ""
                     destination.value = ""
+                    range.value = ""
                     showToast(it.msg.noNull("获取航班信息失败"))
                 }
             }
@@ -114,6 +115,7 @@ class GjjManifestAddViewModel : BaseViewModel(), IOnItemClickListener {
                 fid = ""
                 departure.value = ""
                 destination.value = ""
+                range.value = ""
             }
         }
     }
@@ -142,15 +144,15 @@ class GjjManifestAddViewModel : BaseViewModel(), IOnItemClickListener {
     // 目的港
     val destination = MutableLiveData("")
 
-    // 航程（自动拼接：始发站-目的站）
-    val range = MediatorLiveData<String>().apply {
-        val update = {
-            val dep = departure.value ?: ""
-            val dest = destination.value ?: ""
-            value = if (dep.isNotEmpty() || dest.isNotEmpty()) "$dep-$dest" else ""
-        }
-        addSource(departure) { update() }
-        addSource(destination) { update() }
+    // 航程（航班起始站-航班目的站，仅随航班信息变化，不随用户修改始发站/目的站联动）
+    val range = MutableLiveData("")
+
+    /**
+     * 按航班起始站/目的站拼接航程，起始站为空时返回空
+     */
+    private fun buildRange(fdep: String?, fdest: String?): String {
+        if (fdep.isNullOrEmpty()) return ""
+        return "$fdep-${fdest ?: ""}"
     }
 
     // 品名(中)
@@ -204,6 +206,8 @@ class GjjManifestAddViewModel : BaseViewModel(), IOnItemClickListener {
         fid = intent.getStringExtra(Constant.Key.ID).noNull()
         departure.value = intent.getStringExtra(Constant.Key.DEPARTURE).noNull()
         destination.value = intent.getStringExtra(Constant.Key.DESTINATION).noNull()
+        // 列表页传入的是航班的始发站/目的站，用于初始化航程
+        range.value = buildRange(departure.value, destination.value)
 
         // 回填航班日期和航班号（从列表页传入）
         val passedFlightDate = intent.getStringExtra("flightDate").noNull()
@@ -317,6 +321,7 @@ class GjjManifestAddViewModel : BaseViewModel(), IOnItemClickListener {
         billingWeight.value = manifest.cashWeight.toString()
         departure.value = manifest.origin
         destination.value = manifest.dest
+        range.value = buildRange(manifest.fdep, manifest.fdest)
         goodsNameCn.value = manifest.goodsCn
         goodsNameEn.value = manifest.goods
         unNumber.value = manifest.unNumber
@@ -362,6 +367,7 @@ class GjjManifestAddViewModel : BaseViewModel(), IOnItemClickListener {
         actualWeight.value = manifest.weight.toString()
         departure.value = manifest.origin
         destination.value = manifest.dest
+        range.value = buildRange(manifest.fdep, manifest.fdest)
         goodsNameCn.value = manifest.goodsCn
         goodsNameEn.value = manifest.goods
         unNumber.value = manifest.unNumber