AudiobookPlayer now tracks 'mini' | 'now-listening' locally. The
CoverExpandTile flips to Now Listening, the chevron flips back. The
hidden audio element is owned by the shared parent, so swapping chrome
does not remount it and currentTime advances continuously across the
transition. MiniBar now owns its fixed-bottom positioning so the
AudiobookDetail wrapper can drop. Author + narrator now flow into the
overlay's header.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
