The download-center types (DownloadJob/Spec/Profile/EditSpec/ShareLink/... and
the admin storage/quota shapes) + all ~30 download methods move into a
self-contained api/downloads.ts exporting a `downloadsApi` slice. api.ts spreads
the slice into the `api` façade and re-exports the types via `export *`, so the
53 call sites are unchanged. Cleanly separable — the domain's types reference
only each other and its methods only touch core's req/getActiveAccount. api.ts
1583 -> 1352 lines; no runtime change. Gate green: typecheck, eslint, prettier,
74 vitest.
peter
cc38d8bdfa