feat(mq_editor): jog sliders for synth params, reset partials on WAV load, panel refresh after extract

- Clear extractedPartials and editor state when loading a new WAV
- After extract, refresh right panels (re-select if index still valid)
- Synth fields (decay, jitter, spread) get jog sliders: drag to nudge, spring-back on release
- Spread extension limit dashed line: alpha 0.4→0.75, lineWidth 1→1.5, dash [3,4]→[4,3]

handoff(Gemini): mq_editor UX polish — jog sliders, WAV reset, panel refresh, spread line visibility

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

1 files changed, 3 insertions, 3 deletions

diff --git a/tools/mq_editor/viewer.js b/tools/mq_editor/viewer.js
index 3b2e1b2..76c57e2 100644
--- a/tools/mq_editor/viewer.js
+++ b/tools/mq_editor/viewer.js
@@ -312,10 +312,10 @@ class SpectrogramViewer {
     ctx.fill();
 
     // Dashed boundary lines
-    ctx.globalAlpha = 0.4;
+    ctx.globalAlpha = 0.75;
     ctx.strokeStyle = color;
-    ctx.lineWidth   = 1;
-    ctx.setLineDash([3, 4]);
+    ctx.lineWidth   = 1.5;
+    ctx.setLineDash([4, 3]);
     ctx.beginPath();
     ctx.moveTo(upper[0][0], upper[0][1]);
     for (let i = 1; i < upper.length; ++i) ctx.lineTo(upper[i][0], upper[i][1]);