feat: 实现动态插件系统 (6阶段完成)
- 阶段1: 消息类型序列化 (Serialize/Deserialize, &'static str → String) - 阶段2: FFI 边界类型 + Plugin SDK (plugin_abi, showen-plugin-sdk crate) - 阶段3: PluginLoader + DynamicPlugin (libloading 动态加载 .so) - 阶段4: 版本管理 + 错误策略 (VersionManager, PluginState, 自动回退) - 阶段5: 远程仓库客户端 (HTTP 下载 + tar.gz 安装) - 阶段6: 示例插件 + HTTP 管理 API + 全目录 README 文档 54/54 测试通过,0 warnings。 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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src/plugins/README.md
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# plugins/ — 内置功能插件
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ShowenV2 编译时链接的 5 个内置插件。
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| 插件 | 目录 | 说明 | 平台 |
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|------|------|------|------|
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| VideoPlugin | `video/` | 视频播放引擎,基于 OpenCV,支持状态机驱动、帧变换、过渡效果 | Any |
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| HttpPlugin | `http/` | Web UI + REST API + WebSocket,基于 warp,依赖 VideoPlugin | Any |
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| BlePlugin | `ble/` | BLE GATT WiFi 配网,基于 D-Bus/BlueZ | Linux |
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| WifiPlugin | `wifi/` | WiFi 管理(扫描/连接/热点),基于 nmcli | Linux |
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| ScreenPlugin | `screen/` | 屏幕唤醒锁 + 光标隐藏,基于 systemd-inhibit | Linux |
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## 依赖关系
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```
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video ←── http
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screen (独立)
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ble (独立)
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wifi (独立)
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```
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## 插件生命周期
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1. `register()` → ServiceManager 注册
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2. `init(ctx)` → 获取消息通道和配置
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3. `start()` → 启动工作线程
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4. `handle_message(msg)` → 处理消息
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5. `stop()` → 优雅关闭
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