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/services/agentAssets.js

@@ -60,6 +60,17 @@ function buildQuery(params = {}) {
     search.set('limit', String(params.limit))
   }
 
+  const page = params.page
+  const pageSize = params.pageSize || params.page_size
+
+  if (page) {
+    search.set('page', String(page))
+  }
+
+  if (pageSize) {
+    search.set('page_size', String(pageSize))
+  }
+
   if (params.version) {
     search.set('version', String(params.version))
   }

web/src/services/budgets.js

@@ -4,7 +4,7 @@ function buildQuery(params = {}) {
   const search = new URLSearchParams()
   Object.entries(params || {}).forEach(([key, value]) => {
     if (typeof value === 'undefined' || value === null || value === '') return
-    search.set(key, String(value))
+    search.set(key === 'pageSize' ? 'page_size' : key, String(value))
   })
   const query = search.toString()
   return query ? `?${query}` : ''
@@ -25,6 +25,7 @@ export function createBudgetAllocation(payload = {}) {
   })
 }
 
-export function fetchBudgetTransactions(allocationId) {
-  return apiRequest(`/budgets/allocations/${encodeURIComponent(String(allocationId || '').trim())}/transactions`)
+export function fetchBudgetTransactions(allocationId, params = {}) {
+  const encodedId = encodeURIComponent(String(allocationId || '').trim())
+  return apiRequest(`/budgets/allocations/${encodedId}/transactions${buildQuery(params)}`)
 }

web/src/services/employees.js

@@ -11,6 +11,17 @@ function buildEmployeesQuery(params = {}) {
     search.set('keyword', params.keyword)
   }
 
+  const page = params.page
+  const pageSize = params.pageSize || params.page_size
+
+  if (page) {
+    search.set('page', String(page))
+  }
+
+  if (pageSize) {
+    search.set('page_size', String(pageSize))
+  }
+
   return search
 }
 

web/src/services/reimbursements.js

@@ -1,15 +1,32 @@
 import { apiRequest } from './api.js'
 
-export function fetchExpenseClaims() {
-  return apiRequest('/reimbursements/claims')
+function buildListQuery(params = {}) {
+  const search = new URLSearchParams()
+  const page = params.page
+  const pageSize = params.pageSize || params.page_size
+
+  if (page) {
+    search.set('page', String(page))
+  }
+
+  if (pageSize) {
+    search.set('page_size', String(pageSize))
+  }
+
+  const query = search.toString()
+  return query ? `?${query}` : ''
 }
 
-export function fetchApprovalExpenseClaims() {
-  return apiRequest('/reimbursements/claims/approvals')
+export function fetchExpenseClaims(params = {}) {
+  return apiRequest(`/reimbursements/claims${buildListQuery(params)}`)
 }
 
-export function fetchArchivedExpenseClaims() {
-  return apiRequest('/reimbursements/claims/archives')
+export function fetchApprovalExpenseClaims(params = {}) {
+  return apiRequest(`/reimbursements/claims/approvals${buildListQuery(params)}`)
+}
+
+export function fetchArchivedExpenseClaims(params = {}) {
+  return apiRequest(`/reimbursements/claims/archives${buildListQuery(params)}`)
 }
 
 export function fetchExpenseClaimDetail(claimId) {