Added comprehensive mobile support for Phase 15 (Polish & Optimization):
**Mobile Layout Enhancements:**
- Track controls now collapsible on mobile with two states:
- Collapsed: minimal controls with expand chevron, R/M/S buttons, horizontal level meter
- Expanded: full height fader, pan control, all buttons
- Track collapse buttons added to mobile view (left chevron for track collapse, right chevron for control collapse)
- Master controls collapse button hidden on desktop (lg:hidden)
- Automation and effects bars now available on mobile layout
- Both bars collapsible with eye/eye-off icons, horizontally scrollable when zoomed
- Mobile vertical stacking: controls → waveform → automation → effects per track
**Bug Fixes:**
- Fixed track controls and waveform container height matching on desktop
- Fixed Modal component prop: isOpen → open in all dialog components
- Fixed TypeScript null check for audioBuffer.duration
- Fixed keyboard shortcut category: 'help' → 'view'
**Technical Improvements:**
- Consistent height calculation using trackHeight variable
- Proper responsive breakpoints with Tailwind (sm:640px, lg:1024px)
- Progressive disclosure pattern for mobile controls
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Co-Authored-By: Claude <noreply@anthropic.com>
Phase 2 Complete Features:
- Web Audio API context management with browser compatibility
- Audio file upload with drag-and-drop support
- Audio decoding for multiple formats (WAV, MP3, OGG, FLAC, AAC, M4A)
- AudioPlayer class with full playback control
- Waveform visualization using Canvas API
- Real-time waveform rendering with progress indicator
- Playback controls (play, pause, stop, seek)
- Volume control with mute/unmute
- Timeline scrubbing
- Audio file information display
Components:
- AudioEditor: Main editor container
- FileUpload: Drag-and-drop file upload component
- AudioInfo: Display audio file metadata
- Waveform: Canvas-based waveform visualization
- PlaybackControls: Transport controls with volume slider
Audio Engine:
- lib/audio/context.ts: AudioContext management
- lib/audio/decoder.ts: Audio file decoding utilities
- lib/audio/player.ts: AudioPlayer class for playback
- lib/waveform/peaks.ts: Waveform peak generation
Hooks:
- useAudioPlayer: Complete audio player state management
Types:
- types/audio.ts: TypeScript definitions for audio types
Features Working:
✓ Load audio files via drag-and-drop or file picker
✓ Display waveform with real-time progress
✓ Play/pause/stop controls
✓ Seek by clicking on waveform or using timeline slider
✓ Volume control with visual feedback
✓ Audio file metadata display (duration, sample rate, channels)
✓ Toast notifications for user feedback
✓ SSR-safe audio context initialization
✓ Dark/light theme support
Tech Stack:
- Web Audio API for playback
- Canvas API for waveform rendering
- React 19 hooks for state management
- TypeScript for type safety
Build verified and working ✓
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
