feat: 完善知识库、策略预览与OnlyOffice集成

## 配置与环境
- .env.example: 更新环境变量配置
- docker-compose.yml: 完善Docker编排配置
- docker/README.md: 更新Docker文档

## 后端知识库模块
- endpoints/knowledge.py: 增强知识库API端点
- schemas/knowledge.py: 扩展知识库数据模型
- services/knowledge.py: 完善知识库业务逻辑
- config.py: 优化配置管理
- storage/knowledge/.index.json: 更新知识库索引

## 前端功能
- api.js: 完善API服务层
- knowledge.js: 优化知识库服务
- onlyoffice.js: 新增OnlyOffice文档服务集成
- TopBar.vue: 优化顶部导航栏
- PoliciesView.vue: 完善策略视图
- AppShellRouteView.vue: 新增应用外壳路由视图
- views/scripts/PoliciesView.js: 优化策略脚本
- policiesPreviewFormatters.js: 新增策略预览格式化工具

## 样式
- policies-view.css: 完善策略页样式

## 测试
- api-request.test.mjs: API请求测试
- onlyoffice-service.test.mjs: OnlyOffice服务测试
- policies-preview-formatters.test.mjs: 策略预览格式化测试

web/src/views/AppShellRouteView.vue

@@ -32,6 +32,7 @@
         :ranges="ranges"
         :active-range="activeRange"
         :employee-summary="employeeSummary"
+        :knowledge-summary="knowledgeSummary"
         :custom-range="customRange"
         @update:search="search = $event"
         @update:active-range="activeRange = $event"
@@ -110,7 +111,7 @@
         />
 
         <ApprovalCenterView v-else-if="activeView === 'approval'" />
-        <PoliciesView v-else-if="activeView === 'policies'" />
+        <PoliciesView v-else-if="activeView === 'policies'" @summary-change="knowledgeSummary = $event" />
         <AuditView v-else-if="activeView === 'audit'" />
         <EmployeeManagementView v-else-if="activeView === 'employees'" @overview-change="employeeSummary = $event" />
         <SettingsView v-else />
@@ -151,6 +152,7 @@ import { useSystemState } from '../composables/useSystemState.js'
 import { filterNavItemsByAccess } from '../utils/accessControl.js'
 
 const employeeSummary = ref(null)
+const knowledgeSummary = ref(null)
 
 const {
   activeCase,