app user name shown in ui

src/components/forms/DynamicForm.tsx

@@ -791,12 +791,20 @@ export function DynamicForm({ client, activityId: initialActivityId, instanceId:
           const isValEmpty = val === undefined || val === null || String(val).trim() === '';
           const currentFieldError = showErrors && f.mandatory && isValEmpty ? 'Required' : undefined;
 
+          let displayVal = (val as string) ?? '';
+          if (schema.field_defaults?.[f.id]?.prefill?.value === 'current_user_id') {
+            const user = client.currentUser();
+            if (user && String(val) === String(user.id)) {
+              displayVal = user.name;
+            }
+          }
+
           return (
             <TextField
               label={f.name}
               required={f.mandatory}
               type={type}
-              value={(val as string) ?? ''}
+              value={displayVal}
               onChange={(newVal) => handleFieldChange(f.id, newVal)}
               error={currentFieldError}
             />