client.js carried a stale duplicate of getActiveKey that lacked the
LEGACY: guard added to nostr/utils.js. The tombstone machinery used the
local copy, so a deleted legacy video keyed its tombstone as
ROOT:LEGACY:... while a bare zombie keyed as <pubkey>:<dTag> — the guard
never matched and the video resurrected. Import the single canonical
getActiveKey and drop the duplicate.
Also convert tests/nostr-delete-flow.test.mjs to node:test (it was
silently excluded from the runner and failing), fix its stale write-relay
config, and rewrite its subscription assertions against the real
VideoEventBuffer. New client-level regression test for the guard.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
