Lighter chat header, more consistent header buttons

The chat's floating header and composer area got a small visual refresh, across the hosted assistant page, the embedded web tag, and the dashboard playground.

No more frosted-glass blur. The header used to blur the content scrolling behind it. It now fades smoothly to your background color instead: same effect of content disappearing under the header as you scroll, without the frosted look. The area behind the message composer, at the bottom of the panel, now fades the same way.

More consistent buttons. The "more actions" menu button and the embedded widget's close button now show a visible background and border at rest, instead of being invisible until hovered, are now the same size as the enlarged send button, and carry the same soft shadow as the message composer, for a consistent "floating above the content" look.

No action needed on your side: this applies automatically to every agent.