feat(activity): 为子设备 SlaveActivity 添加调料秤重量增加高亮提醒功能

检测本机秤稳定后重量增加超过10g，高亮对应格子（红底白字），15秒后自动恢复

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

@@ -2,6 +2,8 @@ package com.shuwei.dish.match.ui
 
 import android.annotation.SuppressLint
 import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
 import androidx.core.view.updateLayoutParams
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -45,6 +47,13 @@ class SlaveActivity : BaseActivity() {
     /** 已连接的主设备数量（有连接即代表主设备在线） */
     private var masterConnected = false
 
+    /** 各秤地址的上一次重量快照，用于计算 delta */
+    private val weightSnapshot = mutableMapOf<Int, Double>()
+    /** 主线程 Handler，用于延迟清除高亮 */
+    private val mainHandler = Handler(Looper.getMainLooper())
+    /** 当前高亮清除任务，新高亮触发时取消旧任务 */
+    private var clearHighlightRunnable: Runnable? = null
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         binding = ActivitySlaveBinding.inflate(layoutInflater)
@@ -134,9 +143,19 @@ class SlaveActivity : BaseActivity() {
     /**
      * 监听本机 WeightUtil 回调，实时刷新秤列表
      * 22/18个秤走网格 adapter，其余走线性列表
+     * 秤稳定且重量增加超过阈值时，高亮对应格子，15秒后自动恢复
      */
     private fun listenLocalScales() {
         WeightUtil.addWeightListener(TAG) { address, state, weight ->
+            // 重量快照与高亮判断（在回调线程计算，不涉及 UI）
+            val baseline = weightSnapshot[address]
+            val shouldHighlight = baseline != null
+                    && state == WeightUtil.STATE_STABLE
+                    && (weight - baseline) > WEIGHT_DELTA_THRESHOLD
+            if (baseline == null || state == WeightUtil.STATE_STABLE) {
+                weightSnapshot[address] = weight
+            }
+
             runOnUiThread {
                 when {
                     scale22Adapter != null -> {
@@ -167,6 +186,19 @@ class SlaveActivity : BaseActivity() {
                         linearAdapter.submitList(list)
                     }
                 }
+
+                // 触发格子高亮
+                if (shouldHighlight) {
+                    clearHighlightRunnable?.let { mainHandler.removeCallbacks(it) }
+                    val pos22 = ScaleDeviceConfig.SCALE_ORDER_22.indexOf(address)
+                    val pos18 = ScaleDeviceConfig.SCALE_ORDER_18.indexOf(address)
+                    scale22Adapter?.highlightPosition(pos22)
+                    scale18Adapter?.highlightPosition(pos18)
+                    clearHighlightRunnable = Runnable {
+                        scale22Adapter?.clearHighlight()
+                        scale18Adapter?.clearHighlight()
+                    }.also { mainHandler.postDelayed(it, HIGHLIGHT_DURATION_MS) }
+                }
             }
         }
     }
@@ -186,11 +218,16 @@ class SlaveActivity : BaseActivity() {
     override fun onDestroy() {
         ScaleServiceManager.onMasterConnectionChanged = null
         WeightUtil.removeWeightListener(TAG)
+        clearHighlightRunnable?.let { mainHandler.removeCallbacks(it) }
         super.onDestroy()
     }
 
     companion object {
         const val TAG = "SlaveActivity"
+        /** 重量增加阈值（克），超过此值才触发高亮 */
+        private const val WEIGHT_DELTA_THRESHOLD = 10.0
+        /** 高亮自动恢复时间（毫秒） */
+        private const val HIGHLIGHT_DURATION_MS = 15_000L
     }
 
     /**