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/spec/models/chat_message_spec.rb

@@ -138,7 +138,7 @@ describe ChatMessage do
         <div class="chat-transcript-username">
         chatbbcodeuser</div>
         <div class="chat-transcript-datetime">
-        <a href="/chat/c/-/#{chat_channel.id}?messageId=#{msg1.id}" title="#{msg1.created_at.iso8601}"></a>
+        <a href="/chat/c/-/#{chat_channel.id}/#{msg1.id}" title="#{msg1.created_at.iso8601}"></a>
         </div>
         </div>
         <div class="chat-transcript-messages">