034e670795
- Add audio.svelte.ts: module singleton AudioStore (Svelte 5 runes) with
slug/chapter/title metadata, status, progress, playback state, and
toggleRequest/seekRequest signals for layout<->audio element communication
- Rewrite AudioPlayer.svelte as a store controller: no <audio> element owned;
drives audioStore for presign->generate->play flow; shows inline controls
when current chapter is active, 'Now playing / Load this chapter' banner
when a different chapter is playing
- Update +layout.svelte: single persistent <audio> outside {#key} block so
it never unmounts on navigation; effects to load URL, sync speed, handle
toggle/seek requests; fixed bottom mini-player bar with seek, skip 15s/30s,
speed cycle, go-to-chapter link, dismiss; pb-24 padding when active
- Pass chapterTitle and bookTitle from chapter page to AudioPlayer