Implemented track splitting at playback cursor:
- Added handleSplitAtCursor function to split selected track at current time
- Extracts two audio segments: before and after cursor position
- Creates two new tracks from the segments with numbered names
- Removes original track after split
- Added 'Split at Cursor' command to command palette (keyboard shortcut: S)
- Validation for edge cases (no track selected, no audio, invalid position)
- User feedback via toast notifications
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Co-Authored-By: Claude <noreply@anthropic.com>
Sebastian Krüger
08b33aacb5