- Add actor profile page with outbox fetcher for viewing AP actor posts
- Add follow/unfollow buttons on actor profile (delegates to AP plugin)
- Add AP actor link on item cards for posts from ActivityPub sources
- Add ensureActivityPubChannel() for auto-creating Fediverse channel
- Add AP-aware item storage with dedup, attachments, and categories
- Add CSS styles for actor profile cards and AP-specific UI elements
- Bump version to 1.0.31
