🤖 The message box now formats as you type. Type `**bold**` and it turns bold
the moment you close the stars — same for *italics*, `code`, ~strikethrough~,
"- " lists, "> " quotes and ``` code blocks — or use the shortcuts you already
know: ⌘B, ⌘I, and friends. Backspace right after undoes the formatting, and
what you send is exactly what everyone sees, on every device. Prefer typing
the markers and seeing them stay put? Turn off "Format as you type" in the
Theme sheet — or switch back to the classic plain-text box entirely.