feat(实时库存): 添加库存变化筛选功能

在实时库存表中增加筛选功能，支持按全部、库存增加或库存减少三种条件筛选记录。当选择非全部选项时，会自动获取差值数据用于筛选，提升用户查看特定库存变化的效率。

src/views/plan/RealTimeInventory.vue

@@ -3,6 +3,16 @@
     <div class="table-header">
       <h3>实时库存表</h3>
       <div class="table-actions">
+        <el-select 
+          v-model="inventoryFilter" 
+          placeholder="选择筛选条件" 
+          style="width: 120px; margin-right: 15px;"
+          @change="handleFilterChange"
+        >
+          <el-option label="全部" value="all" />
+          <el-option label="库存增加" value="increase" />
+          <el-option label="库存减少" value="decrease" />
+        </el-select>
         <el-switch
           v-model="showDifference"
           active-text="显示库存变化"
@@ -199,6 +209,62 @@ const activeCells = ref(new Set()) // 存储当前激活的单元格键值
 let clickTimeoutId = null; // 单击事件延时器
 const DBL_CLICK_DELAY = 250; // 双击延时（毫秒）
 
+// 库存筛选相关
+const inventoryFilter = ref('all'); // 筛选类型：all-全部，increase-库存增加，decrease-库存减少
+
+// 方法：根据筛选条件获取过滤后的记录
+const getFilteredRecords = () => {
+  if (!records.value.length) {
+    return [];
+  }
+  
+  switch (inventoryFilter.value) {
+    case 'increase':
+      // 库存增加：基于差值数据筛选出有正差值的记录
+      if (!differenceRecords.value.length) {
+        return [];
+      }
+      const increaseKeys = new Set(
+        differenceRecords.value
+          .filter(diff => diff.difference > 0)
+          .map(diff => `${diff.specification}-${diff.model}-${diff.wire_disc || ''}`)
+      );
+      return records.value.filter(record => {
+        const key = `${record.specification}-${record.model}-${record.wire_disc || ''}`;
+        return increaseKeys.has(key);
+      });
+    case 'decrease':
+      // 库存减少：基于差值数据筛选出有负差值的记录
+      if (!differenceRecords.value.length) {
+        return [];
+      }
+      const decreaseKeys = new Set(
+        differenceRecords.value
+          .filter(diff => diff.difference < 0)
+          .map(diff => `${diff.specification}-${diff.model}-${diff.wire_disc || ''}`)
+      );
+      return records.value.filter(record => {
+        const key = `${record.specification}-${record.model}-${record.wire_disc || ''}`;
+        return decreaseKeys.has(key);
+      });
+    case 'all':
+    default:
+      // 全部：返回所有记录
+      return records.value;
+  }
+};
+
+// 方法：处理筛选条件变化
+const handleFilterChange = () => {
+  console.log('筛选条件变化:', inventoryFilter.value);
+  
+  // 如果筛选条件不是"全部"，确保获取差值数据
+  if (inventoryFilter.value !== 'all' && !differenceRecords.value.length) {
+    console.log('需要获取差值数据以进行筛选');
+    fetchDifferenceData();
+  }
+};
+
 // WMS对话框相关状态
 const wmsDialogVisible = ref(false)
 const currentWmsModel = ref('')
@@ -248,21 +314,25 @@ const dynamicColumns = computed(() => {
 
 // 计算属性：表格数据
 const tableData = computed(() => {
-  console.log('计算表格数据, records.value:', records.value);
+  console.log('计算表格数据, records.value:', records.value, 'inventoryFilter.value:', inventoryFilter.value);
   
-  if (!records.value.length) {
-    console.log('records为空，返回空数组');
+  // 使用过滤后的记录
+  const filteredRecords = getFilteredRecords();
+  console.log('过滤后的记录数量:', filteredRecords.length);
+  
+  if (!filteredRecords.length) {
+    console.log('过滤后的records为空，返回空数组');
     return [];
   }
   
   // 获取所有唯一的规格并从小到大排序（可选数值排序）
-  const specifications = [...new Set(records.value.map(item => item.specification))]
+  const specifications = [...new Set(filteredRecords.map(item => item.specification))]
     .sort((a, b) => parseFloat(a) - parseFloat(b)); // 改为数值排序，避免 "0.800" 在前
   
   console.log('获取到的规格列表:', specifications);
   
   // 获取所有唯一的 model::wire_disc 组合
-  const combinations = [...new Set(records.value.map(item => {
+  const combinations = [...new Set(filteredRecords.map(item => {
     if (item.wire_disc && item.wire_disc.trim() !== '') {
       return `${item.model}::${item.wire_disc}`;
     } else {
@@ -289,7 +359,7 @@ const tableData = computed(() => {
       }
       
       // 查找对应的记录
-      const record = records.value.find(r => {
+      const record = filteredRecords.find(r => {
         const specMatch = r.specification === specification;
         const modelMatch = r.model === model;
         const wireDiscMatch = hasWireDisc