feat: 统一后端分页查询与前端服务层适配

后端新增通用分页模块，为报销单、员工、预算、agent 资产等
端点统一接入分页参数和游标查询，优化 repository 层分页实
现，前端服务层适配分页响应结构，完善预算图表和全局样式，
优化侧边栏和企业选择器组件，引入 Element Plus 插件注册。

web/src/views/scripts/TravelReimbursementCreateView.js

@@ -1,5 +1,6 @@
 import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { useRouter } from 'vue-router'
+import { ElDialog } from 'element-plus/es/components/dialog/index.mjs'
 
 import ConfirmDialog from '../../components/shared/ConfirmDialog.vue'
 import TravelReimbursementInsightPanel from '../../components/travel/TravelReimbursementInsightPanel.vue'
@@ -507,6 +508,7 @@ function buildReviewMainMessageText(message) {
 export default {
   name: 'TravelReimbursementCreateView',
   components: {
+    ElDialog,
     ConfirmDialog,
     TravelReimbursementInsightPanel,
     TravelReimbursementMessageItem