1. per-client links (LinkProvider.LinksForClient) now apply the
inbound's managed Host records with the same precedence as
subscriptions and export-all (host endpoints after fallback
projection); zero-host inbounds keep the legacy output.
2. agent node writes no longer store the form placeholder
address='agent', port=2053: CreateFromRequest/UpdateFromRequest
sanitize it to the node's resolved agent address (update) or
empty (create / unreported), port 0; normalize gains a lenient
endpoint mode for agent writes only.
3. runtime Remote.baseURL refuses the legacy 'agent' placeholder
with a clear no-panel-endpoint error instead of splicing it into
a dialable https://agent:2053 URL.