The callout over the empty Bestie slot becomes a full-width card with
agent pictures scattered around a centered "Create your first agent".
Tapping the card starts creation; a close button dismisses it for good.
Other taps on Home now leave it up.
The card is a new BuzzCallout.card variant: phone-width on wider
screens, and it grows to fit large text below its close button.
Co-authored-by: Carl <c217fe6b9d958f41c3a5e030dccc7f626775a923089cb6491305eade75ea1f1b@buzz.block.builderlab.xyz>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: morgmart <98432065+morgmart@users.noreply.github.com>