feat: 增强风险规则生成引擎与预算中心页面

后端拆分风险规则生成为解释器、语义分析、本体对齐等子模块，
优化模板执行和流程图生成，完善员工种子数据和导入逻辑，增强
报销单权限策略和草稿持久化，前端新增预算中心视图和趋势图
组件，重构审计页面和风险规则测试对话框交互，完善文档中心
和报销创建页面细节，补充单元测试覆盖。

web/src/composables/useNavigation.js

@@ -3,7 +3,7 @@ import { useRoute, useRouter } from 'vue-router'
 
 import { icons } from '../data/icons.js'
 
-export const appViews = ['overview', 'workbench', 'documents', 'requests', 'approval', 'archive', 'policies', 'audit', 'employees', 'logs', 'settings']
+export const appViews = ['overview', 'workbench', 'documents', 'budget', 'policies', 'audit', 'employees', 'logs', 'settings']
 
 export const navItems = [
   {
@@ -31,28 +31,12 @@ export const navItems = [
     desc: '统一查看申请、报销、审批与归档。'
   },
   {
-    id: 'requests',
-    label: '报销中心',
-    navHint: '查看和管理报销单据',
-    icon: icons.list,
-    title: '报销中心',
-    desc: '集中查看草稿、审批进度、票据状态与风险提示。'
-  },
-  {
-    id: 'approval',
-    label: '审批中心',
-    navHint: '处理审批任务',
-    icon: icons.approval,
-    title: '审批中心',
-    desc: '按优先级处理待审批事项，控制时效与风险。'
-  },
-  {
-    id: 'archive',
-    label: '归档中心',
-    navHint: '查阅公司已归档财务数据',
-    icon: icons.archive,
-    title: '归档中心',
-    desc: '集中保存公司已归档入账的报销单据，形成完整财务归档库。'
+    id: 'budget',
+    label: '预算中心',
+    navHint: '管理预算额度、预算占用与超预算预警',
+    icon: icons.budget,
+    title: '预算中心',
+    desc: '配置部门、项目及费用类型预算，跟踪申请占用、报销核销与超预算预警。'
   },
   {
     id: 'policies',
@@ -100,9 +84,7 @@ const viewRouteNames = {
   overview: 'app-overview',
   workbench: 'app-workbench',
   documents: 'app-documents',
-  requests: 'app-requests',
-  approval: 'app-approval',
-  archive: 'app-archive',
+  budget: 'app-budget',
   policies: 'app-policies',
   audit: 'app-audit',
   logs: 'app-logs',
@@ -114,7 +96,7 @@ const routeNameViews = Object.fromEntries(
   Object.entries(viewRouteNames).map(([view, routeName]) => [routeName, view])
 )
 
-routeNameViews['app-request-detail'] = 'requests'
+routeNameViews['app-request-detail'] = 'documents'
 routeNameViews['app-document-detail'] = 'documents'
 routeNameViews['app-log-detail'] = 'logs'