- Fix `TypeError: this.videoModal.resetStats is not a function` by implementing `resetStats` (no-op) in `EmbedVideoModal` and adding a safety guard in `Application.resetTorrentStats`.
- Prevent duplicate `NostrClient` initialization within the same frame by adding idempotent guards in `js/embed.js` and `js/nostr/client.js`.
- Add documentation (`docs/embed-notes.md`) on embed architecture and recommendations for multi-frame resource sharing (SharedWorker).
- Add regression test `tests/embed_playback_check.spec.mjs`.
