Curvature PixiJS editor spike

Two independent views, one curve. Double-click to add; drag handles; Shift-click to select multiple. Delete removes selection. Wheel zooms at the pointer (Alt: time, Shift: value). Space-drag pans.

Time: seconds · Value: normalized 0–1 · Preview: four-second loop, no audio. Drag is one undo step. View selection and zoom are not saved in the musical document.