我已修复了下拉框选择第一个项不筛选的问题。主要做了以下几点改进：

添加了 @clear 事件处理，确保清除选择时也能正确显示所有数据
增加了 selectedBreakdownName 的 watch 监听器，确保其值变化时总是触发筛选
修改了 filterRecordsByBreakdownName 函数，确保它能正确处理所有传入值
在获取维修记录数据后，确保筛选器正确初始化
添加了控制台日志，便于调试和跟踪筛选过程

src/views/eq/RepairSummary.vue

@@ -57,6 +57,7 @@
           placeholder="全部故障"
           clearable
           @change="filterRecordsByBreakdownName"
+          @clear="filterRecordsByBreakdownName"
         >
           <el-option
             v-for="name in uniqueBreakdownNames"
@@ -161,6 +162,13 @@ watch(() => props.dateRange, (newVal, oldVal) => {
   }
 }, { deep: true });
 
+// 监听故障名称变化，确保筛选能正常工作
+watch(selectedBreakdownName, (newVal, oldVal) => {
+  console.log('故障名称从', oldVal, '变化为', newVal);
+  // 当故障名称变化时，执行筛选
+  filterRecordsByBreakdownName();
+});
+
 // 组件加载时自动获取数据
 onMounted(() => {
   console.log('组件加载，设备类型:', props.selectedEquipmentType);
@@ -228,6 +236,10 @@ const fetchRepairRecords = (equipmentCode) => {
         // 提取所有唯一的故障名称
         const breakdownNames = [...new Set(data.data.map(record => record.breakdown_name).filter(Boolean))]
         uniqueBreakdownNames.value = breakdownNames
+        
+        // 确保筛选器初始化正确
+        selectedBreakdownName.value = ''
+        filteredRepairRecords.value = [...selectedRepairRecords.value]
       } else {
         selectedRepairRecords.value = []
         filteredRepairRecords.value = []
@@ -246,16 +258,28 @@ const fetchRepairRecords = (equipmentCode) => {
 }
 
 // 根据故障名称筛选维修记录
-const filterRecordsByBreakdownName = () => {
+const filterRecordsByBreakdownName = (value) => {
-  if (!selectedBreakdownName.value) {
+  console.log('筛选故障名称:', value, 'selectedBreakdownName.value:', selectedBreakdownName.value)
+  
+  // 如果有传入的值，更新 selectedBreakdownName
+  if (value !== undefined) {
+    selectedBreakdownName.value = value
+  }
+  
+  // 获取筛选值，处理空值情况
+  const filterValue = selectedBreakdownName.value || ''
+  
+  if (!filterValue) {
     // 如果没有选择故障名称，显示所有记录
     filteredRepairRecords.value = [...selectedRepairRecords.value]
   } else {
     // 根据选择的故障名称筛选
     filteredRepairRecords.value = selectedRepairRecords.value.filter(
-      record => record.breakdown_name === selectedBreakdownName.value
+      record => record.breakdown_name === filterValue
     )
   }
+  
+  console.log('筛选后记录数:', filteredRepairRecords.value.length)
 }
 
 // 关闭维修记录对话框