fix(cooking): 解决搜索框内容清除和称重逻辑问题

- 在 CookingModeActivity 中添加 clearSearchText 方法用于清除搜索框内容
- 在 FoodListFragment 中添加协程调度器导入并实现空搜索时自动清除功能
- 在 SubmitFoodActivity 中新增初始重量和初始化状态变量
- 修改称重清零逻辑，清零后重置初始重量为 0
- 实现净重计算逻辑，使用秤读数减去初始重量得到实际净重
- 更新重量显示逻辑，使用净重数值进行单位转换和显示

app/src/main/java/com/shuwei/dish/match/ui/CookingModeActivity.kt

@@ -197,4 +197,10 @@ class CookingModeActivity : BaseActivity() {
         isVisible = false
     }
 
+    fun clearSearchText() {
+        isClearingByTabSwitch = true
+        binding.etInputDish.text?.clear()
+        isClearingByTabSwitch = false
+    }
+
 }

app/src/main/java/com/shuwei/dish/match/ui/SubmitFoodActivity.kt

@@ -102,6 +102,12 @@ class SubmitFoodActivity : BaseActivity() {
      */
     private val lastTsMap = mutableMapOf<String, Long>()
 
+    /** 主设备 2格秤的初始重量，首次收到数据时赋值；调用清零后重置为 0.0 */
+    private var initWeight: Double = 0.0
+
+    /** initWeight 是否已完成初始化 */
+    private var initWeightSet: Boolean = false
+
     @Suppress("unchecked_cast", "DEPRECATION")
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -316,7 +322,11 @@ class SubmitFoodActivity : BaseActivity() {
             val content = getRemindSpannable("开始制作")
             showRemindDialog(content) { cook() }
         }
-        binding.btnWeightClear.clickWithDebounce { WeightUtil.tareTwo(2) }
+        binding.btnWeightClear.clickWithDebounce {
+            WeightUtil.tareTwo(2)
+            // 清零后将初始重量重置为 0，后续以秤读数直接作为净重
+            initWeight = 0.0
+        }
         binding.btnSubmit.clickWithDebounce {
             if (cookFoodEntity.foodWeight <= 0.toDouble()) {
                 toast("未识别到菜品熟重")
@@ -329,12 +339,19 @@ class SubmitFoodActivity : BaseActivity() {
         // 监听主设备 2格秤的熟重
         WeightUtil.addWeightListener(TAG) { address, _, weight ->
             if (address == AddressUtil.TWO) {
-                cookFoodEntity.foodWeight = weight
-                if (weight > 1000) {
-                    binding.tvTotalWeight.text = "${(weight / 1000f).roundedDecimalPlace(3)}"
+                // 首次收到数据时记录初始重量
+                if (!initWeightSet) {
+                    initWeight = weight
+                    initWeightSet = true
+                }
+                // 实际净重 = 秤读数 - 初始重量
+                val netWeight = weight - initWeight
+                cookFoodEntity.foodWeight = netWeight
+                if (netWeight > 1000) {
+                    binding.tvTotalWeight.text = "${(netWeight / 1000f).roundedDecimalPlace(3)}"
                     binding.tvWeightUnit.text = "千克"
                 } else {
-                    binding.tvTotalWeight.text = "$weight"
+                    binding.tvTotalWeight.text = "$netWeight"
                     binding.tvWeightUnit.text = "克"
                 }
             }

app/src/main/java/com/shuwei/dish/match/ui/fragment/FoodListFragment.kt

@@ -28,8 +28,10 @@ import com.shuwei.dish.match.utils.ext.startActivity
 import com.shuwei.dish.match.utils.ext.toast
 import com.yanzhenjie.recyclerview.SwipeMenuItem
 import androidx.fragment.app.viewModels
+import kotlinx.coroutines.Dispatchers
 import java.io.Serializable
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 
 class FoodListFragment : BaseFragment<FragmentFoodListBinding>() {
 
@@ -192,6 +194,10 @@ class FoodListFragment : BaseFragment<FragmentFoodListBinding>() {
             )
             foodName?.let { param["foodName"] = it }
             if (pageNo == 1) {
+                //解决回调页面刷新本地数据时，输入框内容还显示的问题
+                if (foodName.isNullOrBlank()) {
+                    activity.clearSearchText()
+                }
                 pendingLocalList = activity.appViewModel.getCookFoodListDirect(
                     cookMode = 0,
                     dinnerType = dinnerType