case 4714 - duplicating a case gives the copy its own case number, open and created now

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/views/biz-gzcase.vue

@@ -222,6 +222,10 @@ export default {
           this.obj = this.$route.params.obj;
           this.obj.concurrency = undefined;
           this.obj.id = 0;
+          //case 4714: a duplicate is a new, open case: the server gives it the next case number when saved
+          this.obj.caseId = 0;
+          this.obj.closed = null;
+          this.obj.created = window.$gz.locale.nowUTC8601String();
           this.obj.name = `${this.obj.name} - ${window.$gz.translation.get(
             "Copy"
           )}`;