fix last issue

Author: Akctarus

front/src/applications/editor/tools/trackEdition/components.tsx

@@ -442,7 +442,7 @@ export const TrackEditionLeftPanel: FC = () => {
           }
           setState({
             ...state,
-            track: { ...(checkedTrack as TrackSectionEntity) },
+            track: checkedTrack as TrackSectionEntity,
           });
         }}
       >

front/src/applications/editor/tools/trackEdition/utils.ts

@@ -33,11 +33,12 @@ export function injectGeometry(track: EditorEntity): EditorEntity {
 
 /**
  * Remove the invalid ranges when the length of the track section has been modified
+ * - keep ranges if begin is undefined in case we just added a new one or if we deleted the begin input value
  * - remove ranges which start after the new end
  * - cut the ranges which start before the new end but end after it
  */
 export function removeInvalidRanges<T>(values: LinearMetadataItem<T>[], newLength: number) {
   return values
-    .filter((item) => item.begin < newLength)
+    .filter((item) => item.begin < newLength || !item.begin)
     .map((item) => (item.end >= newLength ? { ...item, end: newLength } : item));
 }