企业码解析+登录跑通真实后端：Tinode连接适配层、类型化API客户端、会话store

lib/tinode/connection.ts：单例Tinode连接+自己的发布订阅层——SDK的onConnect/onDisconnect/onLogin
是单槽位属性（赋值会互相覆盖），不是真正的多监听器事件源，所以这里统一接管这几个槽位，自己
扇出给任意数量的React订阅方（lib/tinode/hooks.ts的useSyncExternalStore）。installTenantHiPatch
照搬旧应用tinode-web.jsx的实现搬过来——服务端{hi}包的tenant字段SDK本身没有API，只能在原始
sendText层面注入，这是后端协议的真实约束，不是旧代码库特有的写法。

lib/api/client.ts：REST客户端按旧应用src/lib/im-api.js的request函数+完整REASON_MESSAGES错误码
翻译表搬过来（含请求头X-MeetingIM-APIKey等几个月联调换来的正确写法），这次是重新用TypeScript
写、不是复制文件，但端点行为对齐。

实机联调过程中发现并修正了一处凭记忆猜错的地方：tenants/resolve真实响应结构是
{endpoints:{api,file,websocket}, tenant:{code,name}}，不是我最初假设的顶层{code,name}——
已用真实请求验证修正。用企业码default解析成功（显示"Default Tenant"）+ 一次真实错误密码
登录尝试（服务端真实401，错误提示正确显示"账号或密码错误"）两步都对着真实后端验证通过，
不是只测了正确路径。

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/App.tsx

@@ -2,7 +2,10 @@ import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { Navigate, createBrowserRouter, RouterProvider } from 'react-router-dom';
 
 import { AppShell } from '@/app/AppShell';
+import { RequireAuth } from '@/app/RequireAuth';
 import { SectionPlaceholder } from '@/app/SectionPlaceholder';
+import { LoginPage } from '@/features/auth/LoginPage';
+import { TenantEntryPage } from '@/features/auth/TenantEntryPage';
 import { ConversationView } from '@/features/messages/ConversationView';
 import { EmptyMain } from '@/features/messages/EmptyMain';
 import { MessagesLayout } from '@/features/messages/MessagesLayout';
@@ -10,23 +13,30 @@ import { MessagesLayout } from '@/features/messages/MessagesLayout';
 const queryClient = new QueryClient();
 
 const router = createBrowserRouter([
+  { path: 'tenant', element: <TenantEntryPage /> },
+  { path: 'login', element: <LoginPage /> },
   {
-    element: <AppShell />,
+    element: <RequireAuth />,
     children: [
-      { index: true, element: <Navigate to="/messages" replace /> },
       {
-        path: 'messages',
-        element: <MessagesLayout />,
+        element: <AppShell />,
         children: [
-          { index: true, element: <EmptyMain /> },
-          { path: ':topicId', element: <ConversationView /> },
+          { index: true, element: <Navigate to="/messages" replace /> },
+          {
+            path: 'messages',
+            element: <MessagesLayout />,
+            children: [
+              { index: true, element: <EmptyMain /> },
+              { path: ':topicId', element: <ConversationView /> },
+            ],
+          },
+          { path: 'contacts', element: <SectionPlaceholder title="通讯录" /> },
+          { path: 'favorites', element: <SectionPlaceholder title="我的收藏" /> },
+          { path: 'files', element: <SectionPlaceholder title="文件助手" /> },
+          { path: 'calls', element: <SectionPlaceholder title="通话记录" /> },
+          { path: 'settings', element: <SectionPlaceholder title="设置" /> },
         ],
       },
-      { path: 'contacts', element: <SectionPlaceholder title="通讯录" /> },
-      { path: 'favorites', element: <SectionPlaceholder title="我的收藏" /> },
-      { path: 'files', element: <SectionPlaceholder title="文件助手" /> },
-      { path: 'calls', element: <SectionPlaceholder title="通话记录" /> },
-      { path: 'settings', element: <SectionPlaceholder title="设置" /> },
     ],
   },
 ]);