Module-tier chat top chrome bar. CSS-only. Holds chat name, status, and action clusters.
Top chrome bar with slot vocabulary — name, status, action, action-leading clusters. Pure CSS-only stub styled by parent shell via tag-presence.
Typical placement inside <chat-shell>:
Per ADR-0023, the chat cluster's bespoke family — <chat-shell> (host), <chat-thread>, <chat-composer>, <chat-sidebar> (JS-bearing) + <chat-header>, <chat-status>, <chat-empty> (CSS-only). Mirrors the admin cluster's pattern.