Background poller monitors HA media_player state during playlist sessions.
When a track transition occurs and the previous track was played < 40% of
its duration, automatically records "skip" feedback. Also includes the
previously uncommitted delete_feedback endpoint.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds feedback API endpoints that record up/down/skip signals tied to
vibe context (CLAP embeddings + text). Dashboard now shows Feedback
Activity (recent events with signal counts) and Vibe Influence (how
the same track gets rated differently across vibes).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
