Fix: removed edges from DataGraph upon deletion (#36)

Author: pgallino

src/types/graphs/viewgraph.ts

@@ -230,6 +230,10 @@ export class ViewGraph {
       return;
     }
 
+    this.datagraph.removeConnection(
+      edge.connectedNodes.n1,
+      edge.connectedNodes.n2,
+    );
     // Call Edge's remove method to handle disconnection and cleanup
     edge.remove();