Link click handling breaks the <Router> isolation/context principle

在链接的 CodeSandbox 中使用两个 Router 实例重现该问题，然后检查 A 组件的文档级点击处理以及 Router 上下文/集成路径。确认每个 Router 下的点击都会调用该 Router 的集成 setter，并根据列出的复现步骤验证行为。

Describe the bug

I'm making the assumption here that this package supports multiple routers running at the same time as it does use context for isolation instead of some kind of global store. Described bug is not an issue if my assumption is wrong.

Router component provides context which isolates and enforces the scope of router functionality.
For example useLocation under <Router> returns the location for that particular router.

Link click handling (A component) breaks that principle and functionality because link click event handler is added to document and if you have multiple routers (with default integration or custom), only one integration setter will be always called.

I propose to handle it in some sort of scoped way, for example:
<Router scopeEl={htmlElementRef} source={integration}> and

const target = args.scopeEl || document;
target .addEventListener("click", handleAnchorClick);

Or a bit more advanced (and potentially buggy): automatically find the nearest parent HTML element for <Router>.

Your Example Website or App

https://codesandbox.io/s/solid-app-router-example-forked-25ysls?file=/Index.js

Steps to Reproduce the Bug or Issue

1. Go to Home (/) if not already there and open console
2. Click on any of the "Post X (modal)" links
3. Clear console log
4. Click on any of the "Post X (modal)" links in modal (links under router 2)

You can see in logs [router 1] set global loc: that even though this link is rendered under second <Router>, it will still invoke the setter for first <Router> integration.

Expected behavior

Link behaviour respects the context.
Link rendered under <Router1 source={integration1}> should invoke the integration1 setter.
Link rendered under <Router2 source={integration2}> should invoke the integration2 setter.

Screenshots or Videos

No response

Platform

• OS: any
• Browser: any
• Version: 0.8.3

Additional context

No response