Demo guide · 演示说明

Tap “Get code” and the OTP auto-fills. Production sends it via WhatsApp / SMS.
演示环境点「获取验证码」自动填入；正式版通过 WhatsApp / 短信发送。

Data stays in this browser — other devices keep their own copy. Production runs on the PostgreSQL backend.
当前数据保存在本浏览器，换设备互不影响；正式版为 PostgreSQL 后端。

Registration generates a member no. and places the member under the sponsor via 2×2 replication.
注册自动生成会员号，并按二二复制滑落到邀请人子树。