v0.28.0

Added

• Per-post auto-plug opt-out. Any post can now opt out of automatic engagement-threshold autoplugs. A doc is eligible by default; setting autoplug: false in its frontmatter takes it out of the pool. The opt-out is honored across every posting lane: manual mark-sent (enrollment is skipped), the post_to_x MCP tool (new autoplug boolean param), schedule_post, and the scheduler queue — each forwards a no_autoplug signal to the platform so the choice survives to the moment the tweet is tracked. No content-type defaults and no schema migration; the flag rides the existing post / publication / queue payloads.
• Auto-plug toggle in the tweet and article compose views. A pill button in the compose footer flips the current doc's auto-plug eligibility on/off, so press-Post and Schedule flows (X posts, threads, replies) can opt out in one click instead of hand-editing frontmatter.