[mainui] Non-existing url generated in browser address bar

[seime]

The problem

When navigating in MainUI, a non-existant URL is generated by the UI. When doing browser reload, the URL is not found and an error page is shown:

Expected behavior

The browser address field is populated only with URLs that exists.

Steps to reproduce

1. Open Settings -> Thingsand choose any Thing with at least one channel that is linked to an existing Item
2. Click on Channels tab, choose any channel and click on the linked item:
   
   You are taken to a page like

3. In the browser, reload the page -> Page not found

Your environment

runtimeInfo:
  version: 4.1.1
  buildString: Release Build
locale: en-NO
  userAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36
    (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
timestamp: 2024-02-23T07:15:46.836Z

Browser console

No messages

[florian-h05]

This is because the route to the link info page is not part of routes.js, so it works when navigating around, but when reloading the page, the router doesn’t find this page.

Fixing this would require a new route to be added to the router, however it the problem that the https://github.com/openhab/openhab-webui/blob/9f006fdff308610379d2982d5a7584c60eb51230/bundles/org.openhab.ui/web/src/pages/settings/things/link/link-edit.vue link-edit page would need to load the data it normally gets passed from https://github.com/openhab/openhab-webui/blob/9f006fdff308610379d2982d5a7584c60eb51230/bundles/org.openhab.ui/web/src/components/thing/channel-link.vue.