让连接桩支持移动端的触摸组事件

### 功能描述

发现，连接桩在移动端上（如微信浏览器又或者谷歌移动版等），拖动中没有实时轨迹【最后却能连到另一个节点的连接桩上】，分析后发现是没有移动端事件处理。比如 ， this.notifyPortEvent('node:port:mousemove', e, { x, y }) 等等几乎都是鼠标事件。

### 期望解决方案

在egde中增加移动端事件支持。

Start by tracing edge handling around notifyPortEvent and the node:port:mousemove event mentioned in the issue. Compare the existing mouse-event path with mobile touch events, then verify that dragging a connection port in a mobile browser reports a real-time trajectory and still connects to the target port.

Written by the indexing model from the issue text.