fix(activity): 修复 FoodRecognizeActivity 称重更新导致 useWeight 异常的问题

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

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

@@ -234,12 +234,8 @@ class FoodRecognizeActivity : BaseActivity() {
                     }
                     if (weight >= PrepareCookActivity.WEIGHT_RECOGNIZE_VALUE) {
                         adapter.items.firstOrNull { it.isClicked }?.let { item ->
-                            if (weight > (item.useWeight ?: 0.0)) {
-                                // 重量增加：立即更新
-                                cancelPendingWeightUpdate()
-                                item.useWeight = currentWeight
-                            } else if (pendingWeight != weight) {
-                                // 重量减少且目标值变化：重置延迟任务，3 秒无新变化后更新
+                            if (pendingWeight != weight) {
+                                // 无论增减，均延迟更新，避免手拿物品时的瞬时增重干扰
                                 cancelPendingWeightUpdate()
                                 pendingWeight = weight
                                 pendingWeightRunnable = Runnable {
@@ -266,10 +262,16 @@ class FoodRecognizeActivity : BaseActivity() {
      * 携带当前选中食材关闭页面
      */
     private fun finishWithResult(isManualCancel: Boolean) {
+        cancelPendingWeightUpdate()
+
         val intent = Intent().apply {
             putExtra(IS_MANUAL_CANCEL, isManualCancel)
             if (isManualCancel.not()) {
                 list.getOrNull(selectedPosition)?.let {
+                    // 兜底：若 useWeight 仍为空或0，使用当前实时重量
+                    if ((it.useWeight ?: 0.0) <= 0.0) {
+                        it.useWeight = currentWeight
+                    }
                     putExtra(EXTRA_SELECTED_ITEM, it)
                 }
             }
@@ -281,6 +283,6 @@ class FoodRecognizeActivity : BaseActivity() {
     override fun onDestroy() {
         super.onDestroy()
         cancelPendingWeightUpdate()
-//        WeightUtil.removeWeightListener(TAG)
+        WeightUtil.removeWeightListener(TAG)
     }
 }