主题 · Theme — 结构与多语言工程（不含新功能）：四层依赖收口 + 15 种界面语言落地。 Architecture and localisation only — no new features: four-layer dependency clean-up plus 15 UI languages.

新增 · Added

  • 交互层类型门面 · Surface type facade 新增 lib/surface/types.dart：UI 只能看到 DTO / 枚举 / 异常，服务类（GhClient / GhAuthService / IxDownloadManager / IxSession / IxNotificationCenter）被 hide，一律经 SurfaceBridge 取用；15 个页面 / 组件改为只 import 门面。
    Added lib/surface/types.dart: the UI sees only DTOs, enums and exceptions, while service classes are hidden behind a facade and reached exclusively through SurfaceBridge. Fifteen pages/components now import only the facade.

  • 下载能力上桥 · Download capabilities on the bridge SurfaceBridge 提供 downloadTasks / downloadsListenable / pause|resume|retry|cancel|removeDownload / clearFinishedDownloads，下载页不再接触管理器实现。
    SurfaceBridge now exposes task listing, a listenable, pause/resume/retry/cancel/remove and “clear finished”, so the download page never touches the manager implementation.

  • 15 种界面语言 · 15 UI languages zh / zh_TW / en / ja / ko / fr / de / es / pt / ru / ar / hi / th / vi / id：27 个页面 / 848 条中文文案由人工按语境撰写（GitHub / Release / Actions / PR / Token / Pages 等术语不译），其余 14 种语言 AI 按语种合并生成，校验 15 × 27 / 13065 键，0 问题。首次启动跟随系统语言（繁体系统 → zh_TW），设置页即时切换、选择落盘。
    Chinese copy for 27 pages (848 strings) was authored by hand with terminology deliberately left untranslated; the other 14 locales were generated per-language in a single merged request each and validated with zero issues (15 × 27 pages / 13,065 keys). First launch follows the system language (traditional Chinese systems get zh_TW); switching in Settings applies instantly and persists.

  • 可执行门禁 · Executable quality gates tool/layer_audit.py --fatal（依赖只能 surface → domain → base → kernel）与 tool/i18n_scan.py --check（界面文案 0 遗漏 / 分片键集合与 zh 一致）已接入 CI；新增维护手册 docs/I18N.md。
    Added to CI: a layer audit (dependencies may only point downwards) and an i18n audit (no unlocalised UI copy; shard key sets identical to the source locale). A maintenance handbook ships as docs/I18N.md.

变更 · Changed

  • 共享抽象上提到 kernel/contract/（disk_store / disk_types / net_types，原路径保留转发导出），逻辑层改依赖契约；待收敛项由 11 处降至 2 处（仅剩两个实现类）。
    Shared abstractions moved into kernel/contract/ with forwarding exports kept at the old paths, and the domain layer now depends on the contracts; outstanding convergence items dropped from 11 to 2 (two implementation classes remain).
  • 交互层界面文案 0 处未本地化；剩余约 405 处中文均为开发者日志 / 诊断（按设计保留）。
    There is now zero unlocalised UI copy; the ~405 remaining Chinese strings are developer logs and diagnostics, kept in Chinese by design.

已知限制 · Known limitations

  • 本版本为预发布（pre-release），仅结构与多语言改动，请以稳定版为准。
    This is a pre-release containing architecture and localisation changes only; prefer a stable build for daily use.
  • 翻译由 AI 产出并经过格式与占位符校验，但未逐条人工校对；如发现措辞问题请反馈。
    Translations are AI-produced and validated for structure and placeholders, but not line-by-line human-reviewed; please report wording issues.
  • 个别上下文相关文案（如通知正文）可能与实际场景存在细微语感差异。
    A few context-sensitive strings (e.g. notification bodies) may read slightly off in specific scenarios.
  • 5.0 待办：下载多线程与进度/速度动画、页面过渡卡顿、Actions 长日志加载、通知中心图标与展开动画、安卓返回键统一处理。
    Planned for 5.0: multi-threaded downloads with progress/speed animation, page-transition jank, long Actions logs, notification-centre icons & expand animation, unified Android back-key handling.

产物 · Artifacts

Android（arm64-v8a / armeabi-v7a / x86_64 / universal APK / AAB）、Windows、Linux、macOS、iOS，以及引导清单 boot-manifest.zip —— 共 19 个文件；APK 文件名与版本名一致（OGL-v4.9.0-app-*）。
Android (arm64-v8a / armeabi-v7a / x86_64 / universal APK / AAB), Windows, Linux, macOS, iOS plus the signed boot manifest — 19 files in total; APK names match the version (OGL-v4.9.0-app-*).

下载 / Download

本版本共 19 个构件产物。

Android

文件 大小
Android.AAB.zip 60 MB
Android.arm64-v8a.zip 10 MB
Android.armeabi-v7a.zip 10 MB
Android.universal-APK.zip 28 MB
Android.x86_64.zip 11 MB

Windows

文件 大小
Windows.arm64-best-effort.zip 13 MB
Windows.x64.zip 14 MB

Linux

文件 大小
Linux.arm64-best-effort.zip 11 MB
Linux.x64.zip 12 MB

macOS

文件 大小
macOS.arm64.zip 64 MB
macOS.x64.zip 64 MB

iOS

文件 大小
iOS.device-arm64.zip 9.7 MB
iOS.simulator.zip 58 MB

完整列表与校验信息见 Releases v4.9.0-beta。