tags, folder rename, other stuff

backend/src/routes/correspondents.rs

@@ -167,7 +167,8 @@ pub async fn update_correspondent(
     }
 
     if new_name.is_none() && new_metadata.is_none() {
-        return Err(AppError::bad_request("no changes supplied"));
+        let usage = load_usage_for_correspondent(&mut conn, correspondent_id)?;
+        return Ok(Json(build_summary(existing.clone(), usage)));
     }
 
     let mut changeset = CorrespondentChangeset::default();