feat(mq_editor): validated dual-sine synthesis pipeline, clean code for real audio

- Fix incoherent per-sample jitter/spread: seed by partial index only
- Fix || fallback for zero-valued params (use != null checks)
- Phase integration: accumulator (2π*f/SR per sample) replaces 2π*f*t
- Add 'Integrate phase' checkbox to toggle between modes
- Revert Catmull-Rom back to simple bezier (1/3, 2/3 sample points)
- Remove all debug logging, clean up trackPartials, fitBezier

handoff(Gemini): dual-sine test validates full MQ pipeline (extract→track→synth).
Next: real audio loading and partial detection improvements.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/mq_editor/index.html b/tools/mq_editor/index.html
index 22f8ff9..b51a988 100644
--- a/tools/mq_editor/index.html
+++ b/tools/mq_editor/index.html
@@ -85,6 +85,8 @@
       <label>Threshold (dB):</label>
       <input type="number" id="threshold" value="-60" step="any">
 
+      <label style="margin-left:16px;"><input type="checkbox" id="integratePhase" checked> Integrate phase</label>
+
       <label style="margin-left:16px;">Keep:</label>
       <input type="range" id="keepPct" min="1" max="100" value="100" style="width:100px; vertical-align:middle;">
       <span id="keepPctLabel" style="margin-left:4px;">100%</span>
@@ -336,7 +338,8 @@
       const keepCount = Math.max(1, Math.ceil(extractedPartials.length * parseInt(keepPct.value) / 100));
       const partialsToUse = extractedPartials.slice(0, keepCount);
       setStatus(`Synthesizing ${keepCount}/${extractedPartials.length} partials (${keepPct.value}%)...`, 'info');
-      const pcm = synthesizeMQ(partialsToUse, sampleRate, duration);
+      const integratePhase = document.getElementById('integratePhase').checked;
+      const pcm = synthesizeMQ(partialsToUse, sampleRate, duration, integratePhase);
 
       // Build STFT cache for synth signal (for FFT comparison via key 'a')
       if (viewer) {