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d3c2bd015d
This commit allows the ProseMirror rich editor to display chat
transcripts copied from chat using the "Copy" button.
The BBCode usually looks something like this:
```
[chat quote="hunter;29856;2025-03-20T07:13:04Z" channel="design gems 🎉" channelId="95"]
haha **ok** _cool_
[/chat]
```
But there are several variations that must be accounted for:
* Single message from single user
* Multiple messages from a single and multiple users
* Messages inside chat threads
The rich transcript extension has to ignore many of the chat transcript
markdown
tokens because they simply aren't necessary -- none of the ProseMirror
nodes need
to be editable. So, we basically recreate the same HTML that the chat
transcript markdown
rule does in the `toDOM()` function. Maybe in future we want to make the
markdown rule
do less and have this HTML creation in one place, but for now we need to
mirror in both files.
---------
Co-authored-by: Renato Atilio <renato@discourse.org>