feat: 国际进港查询筛选按钮有效时显示红点提示

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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

@@ -2,6 +2,7 @@ package com.lukouguoji.gjj.viewModel
 
 import android.app.Activity
 import android.content.Intent
+import androidx.lifecycle.MediatorLiveData
 import androidx.lifecycle.MutableLiveData
 import com.lukouguoji.gjj.R
 import com.lukouguoji.gjj.activity.IntImpQueryEditActivity
@@ -71,6 +72,20 @@ class IntImpQueryViewModel : BasePageViewModel(), IOnItemClickListener {
     val businessType = MutableLiveData("")
     val goodsCn = MutableLiveData("")
 
+    // 是否有筛选条件（任意一个非空则为 true）
+    val hasFilter: MediatorLiveData<Boolean> = MediatorLiveData<Boolean>().apply {
+        val update = { _: Any? ->
+            value = listOf(spCode, flightNo, origin, awbType, businessType, goodsCn)
+                .any { !it.value.isNullOrEmpty() }
+        }
+        addSource(spCode, update)
+        addSource(flightNo, update)
+        addSource(origin, update)
+        addSource(awbType, update)
+        addSource(businessType, update)
+        addSource(goodsCn, update)
+    }
+
     ///////////////////////////////////////////////////////////////////////////
     // 方法区
     ///////////////////////////////////////////////////////////////////////////