FEATURE: chat redesign - back button to exit threads

[dbattersby]

This is part of the chat redesign work to improve chat navigation.

This change includes:

• New header title with channel name (thread list on mobile)
• New header title without channel name (thread list on full page chat)
• Removes the close button on threads (mobile only)
• Updates to back button route within thread (mobile), taking user to:
  • The thread index, if they accessed the thread from the thread index.
  • The channel itself, if they accessed the thread directly from the channel.
  • The channel itself, if they accessed the thread from a notification.
• Show thread title in chat drawer header
• Properly convert emoji in thread titles in chat header (all devices)
• Upgrades various templates to use gjs format.

/t/-/112524

[jjaffeux]

generally I would prefer to avoid any text without any direct wrapper, here you have

div
icon span
text

• text

I would recommend having two last text wrapped inside a span

[dbattersby]

Good point, I've added wrapper for all of this info inside the chat drawer title so can easily style them or check existence in tests if needed.

[jjaffeux]

@dbattersby I fixed various linting and js errors, I suspect your editor is misconfigured for gjs, let me know if you need help.

Other than this, It's nice if you can fix the few remaining comments, but already ok to merge like this.

[chancancode]

👋🏼 just noticed this pull request! I opened #24260 today, but because the process is mostly automated, I could put that on hold and re-run it again after this has landed, if that makes things easier in. In the meantime, if you noticed anything that doesn't seem right in the conversation, feel free to let me know on there.

[jjaffeux]

👋🏼 just noticed this pull request! I opened #24260 today, but because the process is mostly automated, I could put that on hold and re-run it again after this has landed, if that makes things easier in. In the meantime, if you noticed anything that doesn't seem right in the conversation, feel free to let me know on there.

Thanks, david warned me about the migration you are doing. We will merge this very soon.