refactor(layout): 优化布局尺寸计算逻辑并提取公共工具类

- 添加 SizeTool 工具类统一管理 Flexbox 布局尺寸计算
- 在 MasterScaleActivity 中使用 SizeTool 替代硬编码计算
- 在 SeasoningConfigFragment 中使用 SizeTool 重构尺寸计算
- 在 SlaveActivity 中应用统一的尺寸计算方法
- 更新 Seasoning18GridAdapter 和 Seasoning22GridAdapter 使用现代化布局参数设置
- 调整 fragment_seasoning_config.xml 中的边距和内边距数值
- 为布局文件添加 tools:itemCount 属性支持预览功能

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

@@ -33,6 +33,7 @@ import com.shuwei.dish.match.scale.ScaleServiceManager
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import com.shuwei.dish.match.utils.NetworkUtil
+import com.shuwei.dish.match.utils.SizeTool
 import com.shuwei.dish.match.utils.WeightUtil
 import com.shuwei.dish.match.utils.ext.dp
 import com.shuwei.dish.match.utils.ext.toast
@@ -51,7 +52,7 @@ private const val VIEW_TYPE_SCALE1 = 3
 class MasterScaleActivity : BaseActivity() {
 
     private lateinit var binding: ActivityMasterScaleBinding
-
+    private val size by lazy { SizeTool.getFlexLayoutSize(10.dp) }
     private data class DeviceGroup(
         val deviceId: String,
         val ip: String,
@@ -357,12 +358,7 @@ class MasterScaleActivity : BaseActivity() {
             b.tvDeviceLabel.text = "设备：${group.deviceId}"
 
             if (innerAdapter == null) {
-                val screenWidth = resources.displayMetrics.widthPixels
-                val usable = screenWidth - 8 * 4.dp - 10.dp
-                val smallSize = usable / 9
-                val largeSize = (usable - smallSize * 6) / 2
-                val rvHeight = smallSize * 3 + 3 * 4.dp
-                b.rvScales.layoutParams = b.rvScales.layoutParams.also { it.height = rvHeight }
+                b.rvScales.layoutParams = b.rvScales.layoutParams.also { it.height = size.rvHeight }
                 b.rvScales.layoutManager = FlexboxLayoutManager(b.root.context).apply {
                     flexDirection = FlexDirection.COLUMN
                     flexWrap = FlexWrap.WRAP
@@ -370,8 +366,8 @@ class MasterScaleActivity : BaseActivity() {
                 }
                 b.rvScales.itemAnimator = null
                 innerAdapter = Seasoning22GridAdapter(
-                    largeSize,
-                    smallSize,
+                    size.largeSize,
+                    size.smallSize,
                     showNameOnly = false,
                     showAddress = true
                 ).apply {

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

@@ -27,6 +27,7 @@ import com.shuwei.dish.match.scale.ScaleData
 import com.shuwei.dish.match.scale.ScaleDeviceConfig
 import com.shuwei.dish.match.scale.ScaleServiceManager
 import com.shuwei.dish.match.utils.NetworkUtil
+import com.shuwei.dish.match.utils.SizeTool
 import com.shuwei.dish.match.utils.WeightUtil
 import com.shuwei.dish.match.utils.ext.dp
 import kotlinx.coroutines.Dispatchers
@@ -61,6 +62,7 @@ class SlaveActivity : BaseActivity() {
     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
+    private val size by lazy { SizeTool.getFlexLayoutSize(10.dp) }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -90,13 +92,8 @@ class SlaveActivity : BaseActivity() {
         binding.rvScaleList.itemAnimator = null
         when (GlobalData.deviceId) {
             ScaleDeviceConfig.DEVICE_ID_22 -> {
-                val screenWidth = resources.displayMetrics.widthPixels
-                val usable = screenWidth - 8 * 4.dp - 10.dp
-                val smallSize = usable / 9
-                val largeSize = (usable - smallSize * 6) / 2
-                val rvHeight = smallSize * 3 + 3 * 4.dp
                 binding.rvScaleList.updateLayoutParams<LinearLayout.LayoutParams> {
-                    height = rvHeight
+                    height = size.rvHeight
                     weight = 0f
                     topMargin = 20.dp
                 }
@@ -105,7 +102,7 @@ class SlaveActivity : BaseActivity() {
                     flexWrap = FlexWrap.WRAP
                     alignItems = AlignItems.FLEX_START
                 }
-                scale22Adapter = Seasoning22GridAdapter(largeSize, smallSize, showNameOnly = false).also {
+                scale22Adapter = Seasoning22GridAdapter(size.largeSize, size.smallSize, showNameOnly = false).also {
                     it.onItemClick = { scale, _ -> showTareDialog(scale.address) }
                 }
                 binding.rvScaleList.adapter = scale22Adapter

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

@@ -25,6 +25,7 @@ import com.shuwei.dish.match.scale.ScaleEvent
 import com.shuwei.dish.match.scale.ScaleServiceManager
 import com.shuwei.dish.match.scale.ScaleEvent.SlotConfig
 import com.shuwei.dish.match.ui.SettingActivity
+import com.shuwei.dish.match.utils.SizeTool
 import com.shuwei.dish.match.utils.WeightUtil
 import com.shuwei.dish.match.utils.ext.dp
 import kotlinx.coroutines.Dispatchers
@@ -50,7 +51,7 @@ class SeasoningConfigFragment : BaseFragment<FragmentSeasoningConfigBinding>() {
 //    private lateinit var appViewModel: AppViewModel
 
     private val adapter22 by lazy { buildAdapter22() }
-    private val adapter18 by lazy { Seasoning18GridAdapter(showNameOnly = true) }
+    private val adapter18 by lazy { Seasoning18GridAdapter(showNameOnly = true, leftRightSpace = 20.dp) }
 
     /** 各秤的上一次重量快照，key 格式 "{deviceId}#{address}"，用于计算 delta */
     private val weightSnapshot = mutableMapOf<String, Double>()
@@ -150,24 +151,23 @@ class SeasoningConfigFragment : BaseFragment<FragmentSeasoningConfigBinding>() {
 //        appViewModel = ViewModelProvider(this, factory)[AppViewModel::class.java]
 //    }
 
+
+    private val size by lazy { SizeTool.getFlexLayoutSize(20.dp) }
     /** 构建上层（22格）Adapter，需要先计算格子尺寸 */
     private fun buildAdapter22(): Seasoning22GridAdapter {
-        val usable = resources.displayMetrics.widthPixels - 8 * 4.dp - 10.dp
-        val smallSize = usable / 9
-        val largeSize = (usable - smallSize * 6) / 2
-        return Seasoning22GridAdapter(largeSize, smallSize, showNameOnly = true)
+        return Seasoning22GridAdapter(
+            largeSize = size.largeSize,
+            smallSize = size.smallSize,
+            showNameOnly = true
+        )
     }
 
     /** 配置两个 RecyclerView */
     private fun setupRecyclerViews() {
         // 上层：FlexboxLayoutManager，仿 MasterScaleActivity 中 Scale22VH 的布局方式
         // rvTop 高度 = 小格子尺寸 * 3行 + 3 * 间距，与 Scale22VH 保持一致
-        val screenWidth = resources.displayMetrics.widthPixels
-        val usable = screenWidth - 8 * 4.dp - 10.dp
-        val smallSize = usable / 9
-        val rvTopHeight = smallSize * 3 + 3 * 4.dp
         binding.rvTop.apply {
-            layoutParams = layoutParams.also { it.height = rvTopHeight }
+            layoutParams = layoutParams.also { it.height = size.rvHeight }
             layoutManager = FlexboxLayoutManager(requireContext()).apply {
                 flexDirection = FlexDirection.COLUMN
                 flexWrap = FlexWrap.WRAP