feat(问翻小宝): 增加静态入口页面

关键改动：

- 新增问翻小宝页面，包含历史记录、对话和语音输入区域

- 在侧边栏加入独立入口并放在小宝预警之前

- 增加页面结构和导航顺序测试

Co-Authored-By: Codex GPT-5 <codex@openai.com>

apps/web/components/layout/Sidebar.tsx

@@ -2,7 +2,7 @@
 
 import { useEffect } from 'react';
 import { usePathname, useRouter } from 'next/navigation';
-import { Inbox, Package, FolderKanban, Tag, Users, LayoutGrid, Lightbulb, Clock, Shield, Settings, Sparkles, TriangleAlert } from 'lucide-react';
+import { Inbox, Package, FolderKanban, Tag, Users, LayoutGrid, Lightbulb, Clock, Shield, Settings, Sparkles, TriangleAlert, MessageCircleQuestionMark } from 'lucide-react';
 import { useHasPermission } from '@/components/auth/Guard';
 import { useXiaobaoWarningRisks } from '@/hooks/useXiaobaoWarningRisks';
 import { useWorkspaceWorkItems } from '@/hooks/useWorkspaceWorkItems';
@@ -30,6 +30,7 @@ const NAV_GROUPS = [
   {
     label: '工作区',
     items: [
+      { label: '问翻小宝', path: '/wenfan-xiaobao', icon: MessageCircleQuestionMark, permission: null as string | null },
       { label: '小宝预警', path: '/xiaobao-warning', icon: TriangleAlert, permission: 'xiaobao.warning:view', badge: 'xiaobao-risk' as const },
       { label: '与我相关', path: '/workspace', icon: Inbox, permission: null as string | null, badge: 'workspace-pending' as const },
       { label: '产品', path: '/products', icon: Package, permission: 'product:view' },