v0.3.2

Fixed

• 修复桌面端左下角在 GitHub API 限速（HTTP 403）或网络抖动时误显"更新失败，重试"按钮。当前已是最新版本时，网络类检查失败会静默降级到上一次成功结论，不再把错误状态持久化到 state.json 反复打扰用户；下载 / 校验 / 安装阶段的真实失败仍保留显眼重试入口，并按失败类型细分文案（下载失败 / 校验失败 / 安装失败）。同时加入陈年 error 状态 1 小时 TTL 自动复位、连续失败 4h/24h 退避轮询、旧 state.json 字段向后兼容推断，避免重启后旧错误残留。
• Fix the desktop update notice incorrectly showing "更新失败，重试" in the bottom-left when GitHub Releases API is rate-limited (HTTP 403) or the network is flaky. When the app is already on the latest version, network-class check failures now silently fall back to the last successful conclusion instead of persisting an error state in state.json and pestering the user across restarts. Real failures in the download / validation / install stages still surface a prominent retry entry with error-kind-specific labels (download / validation / install). Also added: 1-hour TTL auto-reset for stale error states, 4h/24h backoff polling on consecutive failures, and backward-compatible inference of new fields in old state.json files so stale errors don't linger after upgrade.