Major fixes:
- Fix drag-and-drop video loading bug (s.source was never set)
- Call switchToVideo() instead of showPlayerView() to properly initialize player state
- Show initial preview frame/thumbnail when video loads
- Improve ffprobe error messages (capture stderr for better diagnostics)
UI improvements:
- Move playlist from left to right side
- Add playlist toggle button (☰) with visibility control
- Load and display preview frame immediately when video loads
- Improve control layout with volume container
- Auto-hide playlist when only one video loaded
Documentation:
- Add FEATURE_ROADMAP.md tracking 30 planned features
- Add ICONS_NEEDED.md listing 53 required SVG icons
- Update .gitignore to exclude binaries
References: DEV_SPEC_FRAME_ACCURATE_PLAYBACK.md
Co-Authored-By: Claude <noreply@anthropic.com>
