feat(小宝): 优化助手入口与预警已读

关键改动：

- 更新 README 项目说明和小宝相关入口命名

- 优化问翻小宝页面与侧边栏测试

- 小宝预警已读状态抑制同签名重复 AI 请求

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

apps/web/components/layout/Sidebar.tsx

@@ -30,8 +30,8 @@ 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: 'AI 助手', path: '/wenfan-xiaobao', icon: MessageCircleQuestionMark, permission: null as string | null },
+      { label: '智能预警', 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' },
       { label: '项目', path: '/projects', icon: FolderKanban, permission: 'project:view' },