Fix calling MetadataProvider.canConnect() without target when dragging a new link

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 - Avoid marking grouped relation as "layout only" when importing a diagram (only grouped relation links themselves).
 - Fix being unable to pan the canvas in Firefox when an graph element with a scrollbar inside was present.
 - Fix a freeze when opening a class tree in authoring mode when `MetadataProvider.filterConstructibleTypes()` returns without any delay.
+- Fix calling `MetadataProvider.canConnect()` with only source and without target when dragging over an element to establish a new link.
 - Fix `flushSync was called from inside a lifecycle method` React warning when calling `centerTo()`, `centerContent()`, `zoomToFit()` on `CanvasApi` from a lifecycle method.
 - Use default property editor for entities or relations when `VisualAuthoring.propertyEditor` returns `undefined`.
 - Fix `prepareLabels` option for `SparqlDataProvider` to be applied for `knownElementTypes()`, `knownLinkTypes()`, `elementTypes()`, `linkTypes()`, `propertyTypes()` and `elements`.

src/widgets/visualAuthoring/dragEditLayer.tsx

@@ -110,17 +110,17 @@ export function DragEditLayer(props: DragEditLayerProps) {
                 (!target || target instanceof EntityElement) &&
                 (!targetEvent || targetEvent.type !== 'entityDelete')
             )) {
-                return new EnitityDragConnection([], workspace);
+                return new EntityDragConnection([], workspace);
             }
 
             const canConnect = await metadataProvider.canConnect(
                 source.data,
-                undefined,
+                target?.data,
                 link.data.linkTypeId === PlaceholderRelationType
                     ? undefined : link.data.linkTypeId,
                 {signal}
             );
-            return new EnitityDragConnection(canConnect, workspace);
+            return new EntityDragConnection(canConnect, workspace);
         },
         [metadataProvider]
     );
@@ -147,7 +147,7 @@ export function DragEditLayer(props: DragEditLayerProps) {
     );
 }
 
-class EnitityDragConnection implements DragLinkConnection {
+class EntityDragConnection implements DragLinkConnection {
     constructor(
         private readonly connections: ReadonlyArray<MetadataCanConnect>,
         private readonly workspace: WorkspaceContext