feat(auth): 移除多角色体验账号直登，仅保留微信手机号授权登录

- 登录页删除体验账号卡片、切换按钮与全部 demo 登录/失败回退逻辑，微信授权失败只提示重试

- completeLogin 只接受服务端签发的 token，禁止无 token 的假登录

- 删除 /api/auth/demo-accounts、/api/auth/demo-login、loadDemoAccounts 与客户端 API

- 停止种子 demo_accounts 配置并清理历史配置行；117 套件/763 用例全绿；线上接口已 404

server/src/index.ts

@@ -3090,88 +3090,6 @@ app.post('/api/auth/wechat-phone', async (req: Request, res: Response) => {
   }
 });
 
-// ===== 体验账号（演示/评审）：清单与文案全部来自 DB 配置，小程序端不再写死 =====
-async function loadDemoAccounts(): Promise<Array<{ userId: number; roleTag: string; roleDesc: string; desc: string }>> {
-  try {
-    const record = await repo.getPlatformConfigByKey('demo_accounts');
-    const value = (record && record.valueJson) || {};
-    if (value.enabled === false) return [];
-    const accounts = Array.isArray(value.accounts) ? value.accounts : [];
-    return accounts
-      .map((a: any) => ({
-        userId: Number(a.userId) || 0,
-        roleTag: String(a.roleTag || ''),
-        roleDesc: String(a.roleDesc || ''),
-        desc: String(a.desc || ''),
-      }))
-      .filter((a: any) => a.userId > 0)
-      .slice(0, 10);
-  } catch (e) {
-    logServerError('loadDemoAccounts', e);
-    return [];
-  }
-}
-
-app.get('/api/auth/demo-accounts', async (_req: Request, res: Response) => {
-  try {
-    const accounts = await loadDemoAccounts();
-    const list = [];
-    for (const acc of accounts) {
-      const u: any = await repo.getUserById(acc.userId);
-      if (!u) continue;
-      if (u.status === '已封禁' || u.status === '封禁') continue;
-      list.push({
-        userId: u.id,
-        nickname: u.nickname || `用户${u.id}`,
-        avatar: u.avatar || '',
-        roleTag: acc.roleTag,
-        roleDesc: acc.roleDesc,
-        desc: acc.desc,
-      });
-    }
-    res.json({ code: 20000, data: list });
-  } catch (err: any) {
-    res.status(500).json({ code: 50000, message: err.message });
-  }
-});
-
-// 体验登录：只对 DB 配置内的账号签发真实 token，避免"无 token 的假登录"造成的 401/身份错配
-app.post('/api/auth/demo-login', rateLimit({ name: 'demo_login', windowMs: 60 * 1000, max: 20, key: rateWriteKey }), async (req: Request, res: Response) => {
-  try {
-    const userId = Number(req.body?.userId) || 0;
-    const accounts = await loadDemoAccounts();
-    if (!accounts.some((a) => a.userId === userId)) {
-      return res.status(403).json({ code: 40300, message: '该账号未开启体验登录' });
-    }
-    const user: any = await repo.getUserById(userId);
-    if (!user) {
-      return res.status(404).json({ code: 40400, message: '体验账号不存在或已被清理' });
-    }
-    if (user.status === '已封禁' || user.status === '封禁') {
-      return res.status(403).json({ code: 40300, message: '该体验账号已被封禁' });
-    }
-    const token = signUserToken(user.id);
-    res.json({
-      code: 20000,
-      data: {
-        userId: user.id,
-        user: {
-          id: user.id,
-          nickname: user.nickname,
-          avatar: user.avatar,
-          gender: user.gender,
-          phone: user.phone,
-        },
-        userToken: token,
-        token,
-      },
-      message: '体验登录成功',
-    });
-  } catch (err: any) {
-    res.status(500).json({ code: 50000, message: err.message || '体验登录异常' });
-  }
-});
-
 // 微信小程序 JSAPI 统一下单预支付接口 (支持真实商户号配置与沙盒收银台无缝切换)
 app.post('/api/pay/wechat/prepay', rateLimit({ name: 'prepay', windowMs: 60 * 1000, max: 30, key: rateWriteKey }), async (req: Request, res: Response) => {
   try {