pageLinks
Where a history entry's and a release's links go, if an app showing the forge's pages has its own idea (the registry, which has no pages for them: none, so they're shown as text). Set once, as that app's pages start.
export const pageLinks: { current?: { entry: (causal: string) => string | undefined; release: (pkg: string, version: string) => string | undefined; }; } = {}