v0.0.6

• 本地端口默认改为 mixed：同一端口同时支持 SOCKS5 与 HTTP
• 新增声明式 listeners：把指定节点绑定到固定本地端口（不随节点增删漂移），类型支持 socks5 / http / mixed
• 内部：accept 多路复用（空闲监听端口不再各占线程）+ 修复拨号超时竞态等资源泄漏

---

• Local ports now default to mixed: SOCKS5 and HTTP on the same port
• New declarative listeners: bind a named node to a fixed local port (no drift as nodes are added/removed), types socks5 / http / mixed
• Internals: multiplexed accept (idle listeners no longer each hold a thread) + dial-timeout race / leak fixes