feat: server-side TTS audio generation, audio queue panel, and home screen fix

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- Add POST /ui/audio/{slug}/{n} endpoint: calls Kokoro-FastAPI server-side,
  writes MP3 atomically to disk, deduplicates concurrent requests via
  in-flight channel map, wraps route with 10-min TimeoutHandler
- Add GET /ui/audio-file/{slug}/{n} endpoint: serves cached MP3 with 1-day
  cache headers
- Add AudioDir/AudioPath helpers to writer.go
- Rewrite JS TTS: remove all MSE/blob/stream code; use plain fetch to
  generate endpoint then set audio.src to returned URL
- Add AbortController to generateAudio; abort on stop() and navigation
- Keep voice/speed controls disabled until setPlaying() fires
- Reset prefetchFired on voice/speed change
- Upgrade prefetch from fire-and-forget to promise chain updating queue badge
- Add sticky bottom audio queue panel: always-visible scrubber with timestamps,
  expandable rows for Now/Next/Dbg with color-coded state badges
- Fix iOS Reader Mode: header->nav aria-hidden, audio outside nav, role=main,
  visible h1 in content area, hover-only paragraph highlight
- Fix home screen Available books hidden: stop hiding cards in #books-grid
  when they appear in Continue Reading; Available always shows all books

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Admin

2026-03-01 20:44:03 +05:00

parent 79f5edf80c

commit 81e5d015b4

3 changed files with 641 additions and 503 deletions

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scraper/internal/server/ui.go

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