v0.3.0 — Faster macOS processing and limiter fixes

Backend improvements

Updated the bundled phaselimiter backend from v0.4.0 to v0.5.0.

• Improved macOS processing performance by using vDSP real FFTs.
• Corrected Nyquist-frequency gradient scaling in the limiter's optimization.
• Added regression tests for gradient accuracy, FFT layouts and scaling, and filter convolution.

GUI fixes

• Fixed the waveform playback cursor failing to repaint correctly after switching between original and mastered audio (A/B).

Other changes

• Updated the screenshot and bundled sample audio to use a CC0 recording from Kimiko Ishizaka’s Open Goldberg Variations.

Backend changes: ai-mastering/phaselimiter@14b5027...fce6f4e

Full Changelog: v0.2.0...v0.3.0