test(sync): client-core REST integration (axios-mock-adapter)
Phase-4 REST-binding coverage for the god-object client (test-only; product
code untouched).
- deletePage/restorePage/listTrash: bodies use pageId (not id), no
permanentlyDelete, trash is per-space + paginates (SPEC §8 deletion mirroring)
- listRecentSince: /pages/recent body (limit:100, spaceId omitted when unset,
cursor threaded, envelope unwrap, cutoff)
- movePage (default position, parentPageId:null); getPage subpages degradation +
{{SUBPAGES}}; getPageJson default content
- validateDocUrls bare/edge node-shape tolerance (no XSS-reject duplication —
that stays in client-pure)
- seam: preauthed client + MockAdapter on the private axios instance, restored
in afterEach; no real network
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