v1.5.3 — 邀请码注册 + 24 小时审核 + 设备注册管控

新增 / New

中文：

注册表单新增"邀请码"选填框：持有效邀请码注册立即免审核，注册完成即可转换（邀请码由商务发放，一次性使用）
无邀请码注册进入 24 小时审核期：注册成功即可登录、完善资料，转换时提示"账号审核中（注册后最长 24 小时自动通过）"；审核期满自动通过，无需人工等待
用户中心额度总览新增账号状态标识，审核状态一目了然
服务端注册管控三件套（已同步上线）：每台设备最多注册 2 个账号（防换号刷免费额度）；管理后台新增「设备管理」「邀请码」页签与账号「通过/拒绝」审核按钮；支持设备拉黑/解封与管理员重置密码

English:

Registration now accepts an optional invite code: signing up with a valid code skips review entirely — the account is usable immediately (codes are issued by sales, one-time use)
Without an invite code, new accounts enter a 24-hour review period: you can log in and complete your profile right away, while conversions show "account under review (auto-approved within 24 hours of signup)"; approval is automatic once the period ends
User Center quota overview now shows the account status badge
Server-side signup controls (already deployed): max 2 accounts per device (prevents quota farming by re-registering); admin panel adds "Devices" and "Invite Codes" tabs plus Approve/Reject review actions; device block/unblock and admin password reset supported

中文：

English:

Registration rate limit relaxed to 15/hour per IP, avoiding false positives on shared networks
Unified client/server error messages with clear Chinese copy for pending / rejected / invalid invite code