feat(mq_editor): Implement phase-coherent partial tracking

Implements a more robust partial tracking algorithm by using phase
coherence to validate and link spectral peaks across frames. This
significantly improves tracking accuracy, especially for crossing or
closely-spaced partials.

Key changes:
- : The STFT cache now computes and stores the phase for each
  frequency bin alongside the magnitude.
- : The peak detection logic now interpolates the
  phase for sub-bin accuracy.
- : The core tracking algorithm was replaced with a
  phase-aware model. It predicts the expected phase for a partial in
  the next frame and uses a cost function combining both frequency and
  phase error to find the best match.

This implementation follows the design outlined in the new document
.

handoff(Gemini): Phase prediction implemented. Further tuning of the cost function weights may be beneficial.

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