Summarize the release notes in one sentence.
Showcase / host composition
Action bar.
action-bar-primitive.tsx: icon actions under the last assistant turn. For the fuller ChatGPT action set, see chatgpt. Host owns copy/regenerate.
v0.5 ships source-first chat primitives with host-owned tools and approvals.
Copied state (host sets data-au-state="copied" briefly).
Deferred: autohide-while-running JS. Prefer always-visible actions when JS is off.
<link rel="stylesheet" href="tokens.css">
<link rel="stylesheet" href="components/button/button.css">
<link rel="stylesheet" href="components/chat-message/chat-message.css">
<link rel="stylesheet" href="host-chrome.css">
<link rel="stylesheet" href="host-skins.css">