TASK-AUDIO-001: Enhanced gapless playback with 10s pre-buffering
TASK-AUDIO-002: Crossfade UI in expanded player (0-12s configurable slider)
TASK-AUDIO-003: Audio normalization via Web Audio API GainNode (EBU R128)
TASK-AUDIO-004: Complete player features (playback speed, preload, fade)
- AudioPlayerService: added normalization gain node, connectAudioGraph(),
setNormalizationGain(), setNormalizationEnabled() with dB-to-linear conversion
- useAudioAnalyser: integrated with gain node for correct audio graph routing
- useAudioNormalization: new hook syncing normalization state with track changes
- PlayerStore: added normalizationEnabled setting (persisted)
- AudioSettingsPanel: new component with crossfade slider + normalization toggle
- PlayerExpanded: added audio settings panel with Settings2 icon toggle
- GlobalPlayer: integrated useAudioNormalization hook
- usePlayer: extended pre-buffer window from 5s to 10s for gapless playback
- 97 tests passing (56 service + 41 store)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
