v0.3.3

Added

• Spectrum: multi-resolution PSD bank with crossfaded crossovers
• Spectrum: single-size STFT analyzer producing per-bin PSD
• Spectrum: log-frequency render grid
• Spectrum: drive display from multi-resolution bank with 4.5 dB/oct slope
• Spectrum: calibrate display offset to 0 dBFS reference
• Spectrum: timed peak-hold default (1.5s hold, 8 dB/s fall)
• Spectrum: show note name in spectrum and spectrogram hover

Fixed

• Audio: reset meters on format restart
• Loudness: tighten value-to-unit gap in stats rows
• Spectrogram: reuse live-frame grid centers for visual ticks
• Spectrum: remove octave smoothing + level fudge for honest, consistent dB
• Spectrum: reference display so full-scale sine reads ~0 dBFS
• Spectrum: pivot display slope at 1 kHz to avoid inflating the curve