fix(mq_editor): jitter + central spectrum invalidationHEADmain

mq_synth.js:
- jitter was only used as a static initial phase offset (inaudible);
  now drives per-sample LCG frequency perturbation (±jitter fraction of
  instantaneous freq) in both sinusoidal (integratePhase path) and
  resonator modes (separate jitterSeed, independent from noise excitation)
- disableJitter option now correctly gates jitter to 0 in both modes
  (was never read before)

viewer.js / app.js:
- remove invalidatePartialSpectrum() and onResonatorParamChange callback;
  replace with viewer.onGetSynthOpts callback, called inside
  _computePartialSpectrum to pull fresh synthOpts at compute time
- all UI changes (resonator r/gain, forceResonator, globalR/gain,
  forceRGain, sinusoidal params) now use viewer.render() as the single
  invalidation path — no more split between render() and
  invalidatePartialSpectrum()

handoff(Gemini): jitter active on both synth modes; spectrum always sees
fresh synthOpts via onGetSynthOpts; viewer.render() is the only
invalidation path needed.

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

1 files changed, 6 insertions, 12 deletions

diff --git a/tools/mq_editor/app.js b/tools/mq_editor/app.js
index 380bb12..1c6d548 100644
--- a/tools/mq_editor/app.js
+++ b/tools/mq_editor/app.js
@@ -46,27 +46,20 @@ document.getElementById('hpK2').addEventListener('input', function() {
   document.getElementById('hpK2Val').textContent = k >= 1.0 ? 'bypass' : fmtHz(f);
 });
 
-function invalidatePartialSpectrum() {
-  if (!viewer) return;
-  viewer.synthOpts = getSynthParams().opts;
-  viewer._partialSpecCache = null;
-  viewer.renderPartialSpectrum(viewer.spectrumTime, true);
-}
-
 // Show/hide global resonator params when forceResonator toggled
 document.getElementById('forceResonator').addEventListener('change', function() {
   document.getElementById('globalResParams').style.display = this.checked ? '' : 'none';
-  invalidatePartialSpectrum();
+  if (viewer) viewer.render();
 });
 document.getElementById('globalR').addEventListener('input', function() {
   document.getElementById('globalRVal').textContent = parseFloat(this.value).toFixed(4);
-  invalidatePartialSpectrum();
+  if (viewer) viewer.render();
 });
 document.getElementById('globalGain').addEventListener('input', function() {
   document.getElementById('globalGainVal').textContent = parseFloat(this.value).toFixed(2);
-  invalidatePartialSpectrum();
+  if (viewer) viewer.render();
 });
-document.getElementById('forceRGain').addEventListener('change', invalidatePartialSpectrum);
+document.getElementById('forceRGain').addEventListener('change', () => { if (viewer) viewer.render(); });
 
 let audioBuffer = null;
 let viewer = null;
@@ -207,7 +200,8 @@ function loadAudioBuffer(buffer, label) {
     document.getElementById('exploreBtn').disabled = false;
     document.getElementById('contourBtn').disabled = false;
     editor.setViewer(viewer);
-    viewer.onPartialSelect = (i) => editor.onPartialSelect(i);
+    viewer.onGetSynthOpts   = () => getSynthParams().opts;
+    viewer.onPartialSelect  = (i) => editor.onPartialSelect(i);
     viewer.onRender        = ()  => editor.onRender();
     viewer.onBeforeChange  = pushUndo;
     viewer.onExploreMove = (time, freq) => {