- Add `isSessionActor` helper to `js/nostr/sessionActor.js` to identify ephemeral keys.
- Update `js/nostr/viewEvents.js` to namespace view deduplication caches by `actorPubkey` to prevent data leakage between sessions.
- Block comment publishing for session actors in `js/nostr/commentEvents.js`.
- Block watch history list publishing for session actors in `js/nostr/client.js`.
- Block user block list publishing for session actors in `js/userBlocks.js`.
- Block hashtag preference publishing for session actors in `js/services/hashtagPreferencesService.js`.
- Add inline documentation clarifying variable sources.
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