MCPServerHeaderItem

Server metadata this header row is rendering.

Apply or remove the selected-row styling and re-render the label.

Re-renders content on selection change so dim secondary spans are suppressed on the $primary selection background — the same approach MCPToolItem uses via _desc_style.

Replace the underlying server data and re-render in place.

Used by apply_server_disable_toggle so an F2 toggle updates this header without tearing down and re-mounting the widget. Preserves the row's selected state so the cursor stays put visually.

Handle click — select the header or activate its primary action.

Headers are not expandable. Clicking once moves the cursor; clicking the already-selected header starts login for an unauthenticated or OAuth-backed remote server (see _can_start_login), or opens details for an error server.