feat: 新增文档翻译 + 文案校对 + 智能助手 + 批量字段提取四大功能

- 文档翻译：多语言翻译（中英日韩法德西），支持导出 Word/PPT/Excel/PDF
- 文案校对：错别字/语病/风格/数据检查，三级校对模式，质量评分
- 智能助手：对话/任务拆解/文案生成/批量提取 四个模式入口
- 批量提取：自定义字段配置，AI 结构化提取，CSV 导出

后端新增 API：/api/document/translate /api/copy/proofread /api/assistant/chat /api/batch/extract
前端新增页面：4 个新页面 + 模板入口 + API 模块
路由更新：tools/ 系列页面路由

Co-Authored-By: Claude Code <noreply@anthropic.com>

eai_ap_app/frontend/src/router/index.js

@@ -24,6 +24,11 @@ const routes = [
       { path: 'apps/process-coordination', name: 'ProcessCoordinationApp', meta: { workspaceKey: 'process-coordination' }, component: () => import('@/views/workbench/BusinessAppPage.vue') },
       { path: 'apps/report-generation', name: 'ReportGenerationApp', meta: { workspaceKey: 'report-generation' }, component: () => import('@/views/workbench/BusinessAppPage.vue') },
       { path: 'report-gen', name: 'ReportGeneration', meta: { requiresAdmin: true }, component: () => import('@/views/report/ReportGenerationPage.vue') },
+      { path: 'tools/document-translate', name: 'DocumentTranslate', component: () => import('@/views/tools/DocumentTranslatePage.vue) },
+      { path: 'tools/copy-proofreading', name: 'CopyProofreading', component: () => import('@/views/tools/CopyProofreadingPage.vue) },
+      { path: 'tools/smart-assistant', name: 'SmartAssistant', component: () => import('@/views/tools/SmartAssistantPage.vue) },
+      { path: 'tools/batch-extract', name: 'BatchExtract', component: () => import('@/views/tools/BatchExtractPage.vue) },
+
       { path: 'apps/wechat-official-account', name: 'WechatOfficialAccountApp', meta: { workspaceKey: 'wechat-official-account' }, component: () => import('@/views/workbench/OfficialAccountWorkflowPage.vue') },
       { path: 'apps/logistics-fulfillment', name: 'LogisticsFulfillmentApp', meta: { workspaceKey: 'logistics-fulfillment' }, component: () => import('@/views/workbench/BusinessAppPage.vue') },
       { path: 'apps/hr-email-sorter', name: 'HrEmailSorter', meta: { workspaceKey: 'hr-email-sorter' }, component: () => import('@/views/workbench/BusinessAppPage.vue') },