- Add octave offset combo (-3 to +3) in title bar for MIDI input transposition
- Fix waveform sidebar base note from C3 to C4
- Fix midiNoteToSliceIndex to compare pitch classes instead of raw MIDI notes
- Add colored slice indicator dots on waveform sidebar keys
- Embed audio data, file path, sample rate, and slices in plugin state for
DAW project save/restore (falls back to file path if embedded data missing)