Yep, at least you can use siteUrl defined in the class https://github.com/geonetwork/core-geonetwork/blob/develop/core/src/main/java/org/fao/geonet/kernel/metadata/DefaultStatusActions.java#L124 and maybe make a distinction between index field and global properties
```
"* {{index:title}} ({{serverurl}}?uuid={{index:uuid}})
```
Could that be an option ?