`chat_ui(icon_assistant=...)` used for user messages

[jose-c-milliman]

My expectation is that the parameter name icon_assistant would not change the icon for user messages.

Reproducible example:
https://shiny.posit.co/py/templates/dinner-recipe/

Here is the link to the code that seems to apply it to all messages:
https://github.com/posit-dev/shinychat/blob/main/pkg-py/src/shinychat/_chat.py#L1776

[cpsievert]

Thanks for the report! Appears this was introduced by #101. I confirmed with this more minimal example, and I would assume the same problem exists for the R package:

from faicons import icon_svg
from shinychat.express import Chat
import shiny.express

chat = Chat("chat")

chat.ui(
    messages=["**Hello!** How can I help you today?"],
    icon_assistant=icon_svg("slack"),
)

@chat.on_user_submit
async def __handle_user_input(user_input: str):
    await chat.append_message(f"You said: {user_input}")

@gadenbuie could you have a look into this one?