feat(mq_editor): global resonator test-mode checkbox in Synthesis panel

Adds "Resonator (all)" checkbox that forces resonator synthesis for all
partials without modifying per-partial mode settings.
Fixes null deref when partial.resonator is undefined in forceResonator mode.

handoff(Gemini): resonator test-mode checkbox added; no per-partial data mutated

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

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/mq_editor/mq_synth.js b/tools/mq_editor/mq_synth.js
index f298392..d85c890 100644
--- a/tools/mq_editor/mq_synth.js
+++ b/tools/mq_editor/mq_synth.js
@@ -50,12 +50,12 @@ function synthesizeMQ(partials, sampleRate, duration, integratePhase = true, opt
     const fc = partial.freqCurve;
     const ac = partial.ampCurve;
 
-    if (partial.resonator && partial.resonator.enabled) {
+    if ((partial.resonator && partial.resonator.enabled) || options.forceResonator) {
       // --- Two-pole resonator mode ---
       // Driven by band-limited noise scaled by amp curve.
       // r controls pole radius (bandwidth): r→1 = narrow, r→0 = wide.
       // gainNorm = sqrt(1 - r²) normalises steady-state output power to ~A.
-      const res      = partial.resonator;
+      const res      = partial.resonator || {};
       const r        = res.r        != null ? Math.min(0.9999, Math.max(0, res.r)) : 0.995;
       const gainComp = res.gainComp != null ? res.gainComp : 1.0;
       const gainNorm = Math.sqrt(Math.max(0, 1.0 - r * r));