fix(vst): master-gain per-sample ramp (no zipper/click); voice-count commits once on release; minor review items

src/vst/reasampler_editor.h

@@ -179,7 +179,9 @@ private:
     // Y = amp 0-1), the monotone spline traced by eval, one draggable node handle per control
     // point. Shared by the Sample face (beside the hero) and the Zone param panel; all mapping /
     // hit-test / clamp math lives in the pure velocity_curve module. `r` empty -> draws nothing.
-    void paintVelocityCurve(LICE_IBitmap* bmp, const Rect& r, const PerformanceZone& zone);
+    // drawCaption: false suppresses the "Vel curve" corner label (the popup draws its own title).
+    void paintVelocityCurve(LICE_IBitmap* bmp, const Rect& r, const PerformanceZone& zone,
+                            bool drawCaption = true);
 
     // Route a mouse-down inside curve-editor box `r` editing map_.zones[zoneIndex]: a node grab
     // starts a kCurveNode drag; Alt-click on an interior node deletes it (committed at once);