🤖 New iPhone and Mac apps (0.9.5), fixing two things.

Making an open group that starts with just you now actually makes the group.
It was quietly creating a private notes chat instead — the name you gave it was
dropped, and nobody could find it in Discover. If you ended up with a stray
"Notes" chat from trying, you can delete it from its menu; the group was never
made.

And on the Mac, the conversation stops jumping around while you type. Anything
that resized the message box — a line wrapping onto the next one, the @ or /
suggestion list opening — could set the chat scrolling for a second or two
before it settled.
