fix(core,nodes,edges): nullish check for event obj

packages/core/src/composables/useEdgeHooks.ts

@@ -17,47 +17,47 @@ export default function useEdgeHooks(edge: GraphEdge, emits: VueFlowStore['emits
 
   edgeHooks.doubleClick.on((event) => {
     emits.edgeDoubleClick(event)
-    edge.events.doubleClick?.(event)
+    edge.events?.doubleClick?.(event)
   })
 
   edgeHooks.click.on((event) => {
     emits.edgeClick(event)
-    edge.events.click?.(event)
+    edge.events?.click?.(event)
   })
 
   edgeHooks.mouseEnter.on((event) => {
     emits.edgeMouseEnter(event)
-    edge.events.mouseEnter?.(event)
+    edge.events?.mouseEnter?.(event)
   })
 
   edgeHooks.mouseMove.on((event) => {
     emits.edgeMouseMove(event)
-    edge.events.mouseMove?.(event)
+    edge.events?.mouseMove?.(event)
   })
 
   edgeHooks.mouseLeave.on((event) => {
     emits.edgeMouseLeave(event)
-    edge.events.mouseLeave?.(event)
+    edge.events?.mouseLeave?.(event)
   })
 
   edgeHooks.contextMenu.on((event) => {
     emits.edgeContextMenu(event)
-    edge.events.contextMenu?.(event)
+    edge.events?.contextMenu?.(event)
   })
 
   edgeHooks.updateStart.on((event) => {
     emits.edgeUpdateStart(event)
-    edge.events.updateStart?.(event)
+    edge.events?.updateStart?.(event)
   })
 
   edgeHooks.update.on((event) => {
     emits.edgeUpdate(event)
-    edge.events.update?.(event)
+    edge.events?.update?.(event)
   })
 
   edgeHooks.updateEnd.on((event) => {
     emits.edgeUpdateEnd(event)
-    edge.events.updateEnd?.(event)
+    edge.events?.updateEnd?.(event)
   })
 
   return Object.entries(edgeHooks).reduce(