update

src/ui/TrackUnit/trackUnit.ts

@@ -4,6 +4,7 @@ import type { IconName } from "@/ui/Widgets/Icon/icons";
 export const TypeClasses = [ "Ghost", "Accent" ] as const;
 
 export const StickingTypeIconMap = {
+    none: null,
     lf: 'lf', 
     lh: 'lh',
     rf: 'rf',
@@ -17,7 +18,7 @@ export const TrackUnitTypeClassMap = {
     "GhostNoteAccent": ["Ghost", "Accent"],
 } as const satisfies Record<TrackUnitType, Readonly<string[]>>;
 
-export function getClasses(options: { on: boolean, stickingType: TrackUnitStickingType | null, type: TrackUnitType, highlightable?: boolean }) {
+export function getClasses(options: { on: boolean, stickingType: TrackUnitStickingType, type: TrackUnitType, highlightable?: boolean }) {
     const classes = ["track-unit"];
     if (options.on) {
         classes.push("on");