feat: Beat Slicer v0.0.1 — working release Transient detection with RMS onset strength, warmup-frame fix, slice-entry alignment, race-condition fix (await delete before create), direct temp-path approach (no importIntoProject), per-step error messages in dialog, and Ableton dark-theme UI. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>