修复分页切换不生效：添加@current-change和@size-change事件触发loadData

frontend/src/views/machine/MachineListPage.vue

@@ -82,6 +82,8 @@
       background
       layout="total, sizes, prev, pager, next, jumper"
       style="margin-top:16px"
+      @current-change="loadData"
+      @size-change="handleSizeChange"
     />
 
     <!-- 新增/编辑弹窗 -->
@@ -213,6 +215,12 @@ function resetQuery() {
   loadData()
 }
 
+/** 每页条数变化时重置到第1页并重新加载 */
+function handleSizeChange() {
+  page.page = 1
+  loadData()
+}
+
 function handleAdd() {
   editingId.value = null
   Object.assign(form, { name: '', deviceCode: '', workshopId: undefined, collectAddressId: undefined, brandId: undefined, brandName: '', ipAddress: '', workerId: undefined })