DEV: Pass messageId as a dynamic segment instead of a query param (#20013)

* DEV: Rnemae channel path to just c

Also swap the channel id and channel slug params to be consistent with core.

* linting

* channel_path

* Drop slugify helper and channel route without slug

* Request slug and route models through the channel model if possible

* DEV: Pass messageId as a dynamic segment instead of a query param

* Ensure change is backwards-compatible

* drop query param from oneboxes

* Correctly extract channelId from routes

* Better route organization using siblings for regular and near-message

* Ensures sessions are unique even when using parallelism

* prevents didReceiveAttrs to clear input mid test

* we disable animations in capybara so sometimes the message was barely showing

* adds wait

* ensures finished loading

* is it causing more harm than good?

* this check is slowing things for no reason

* actually target the button

* more resilient select chat message

* apply similar fix to bookmark

* fix

---------

Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>

plugins/chat/assets/javascripts/lib/discourse-markdown/chat-transcript.js

@@ -122,7 +122,7 @@ const chatTranscriptRule = {
     } else {
       let linkToken = state.push("link_open", "a", 1);
       linkToken.attrs = [
-        ["href", `${channelLink}?messageId=${messageIdStart}`],
+        ["href", `${channelLink}/${messageIdStart}`],
         ["title", messageTimeStart],
       ];