Shell
A page's shell, rendered ahead (#7svoiw35): its HTML up to what's live, what React left to render
(postponed, as JSON: a request resuming it uses up the object; null when nothing is left), and the trees the
shell's server components rendered.
import type { SsrRequest } from "#codebase/tcmts/cli/web"; export interface Shell { html: string; postponed: string | null; trees: SsrRequest["trees"]; }