🤖 **Messages appear the instant you send them.** Your message now shows in the
conversation immediately, without waiting for the server to acknowledge it — and
it's replaced silently by the delivered copy once it lands, so nothing flickers.
If a send is taking a while (a flaky connection), the message dims and shows a
subtle "Sending…" so you know it's still on its way. The whiteboard gets the same
treatment: a stroke stays put the moment you lift the pen, instead of flashing
away and back.