fix default diagramm constraint

Author: Kr0nox

src/features/constraintMenu/ConstraintMenu.ts

@@ -45,6 +45,15 @@ export class ConstraintMenu extends AbstractUIExtension implements Switchable {
         editorModeController?.onModeChange(() => {
             this.forceReadOnly = editorModeController!.isReadOnly();
         });
+        constraintRegistry.onUpdate(() => {
+            if (this.editor) {
+                const editorText = this.editor.getValue();
+                // Only update the editor if the constraints have changed
+                if (editorText !== this.constraintRegistry.getConstraints()) {
+                    this.editor.setValue(this.constraintRegistry.getConstraints() || "");
+                }
+            }
+        });
     }
 
     id(): string {

src/features/serialize/defaultDiagram.json

@@ -612,6 +612,6 @@
             ]
         }
     ],
-    "constraints": "data Sensitivity.Personal neverFlows vertex Location.nonEU",
+    "constraints": "- default: data Sensitivity.Personal neverFlows vertex Location.nonEU",
     "mode": "edit"
 }