fix: update test to reflect empty layout being valid on room create

backend/src/routes/rooms.rs

@@ -341,16 +341,16 @@ mod tests {
     }
 
     #[sqlx::test(migrations = "./migrations")]
-    async fn layout_validation_rejects_empty_layout(pool: sqlx::SqlitePool) {
+    async fn layout_empty_layout_is_accepted(pool: sqlx::SqlitePool) {
         let (app, auth) = build_test_app(pool).await;
         let (status, _) = post_json(
             app,
             "/api/admin/rooms",
             &auth,
-            json!({"name":"Bad","layout":[]}),
+            json!({"name":"Empty","layout":[]}),
         )
         .await;
-        assert_eq!(status, StatusCode::BAD_REQUEST);
+        assert_eq!(status, StatusCode::CREATED);
     }
 
     #[sqlx::test(migrations = "./migrations")]