Phase3 联调链补 relay 启动入口:src/main.rs 调 DefaultRelayServer::start(listen 0.0.0.0:8080,DF_RELAY_ADDR env 覆盖)+ tracing-subscriber 日志。cargo run -p df-relay 启动,提供 /ws/device + /ws/miniapp 端点。cargo check EXIT=0。
df-tunnel:桌面端出站WS客户端(TunnelClient trait+骨架,穿NAT连云后端) df-relay:axum WS中继服务(转发小程序↔桌面端,广播骨架) 双crate独立消息骨架,不依赖src-tauri/df-types避跨crate强耦合 workspace crates/* glob自动注册,Phase2填充WS握手/鉴权/重连/路由