fix: stabilize rpg creation entry and opening cg

server-rs/crates/api-server/src/app.rs

@@ -619,6 +619,31 @@ mod tests {
         assert_eq!(body["error"]["details"]["creationTypeId"], "visual-novel");
     }
 
+    #[tokio::test]
+    async fn disabled_rpg_route_returns_service_unavailable() {
+        let state = AppState::new(AppConfig::default()).expect("state should build");
+        state.set_test_creation_entry_route_enabled("rpg", false);
+        let app = build_router(state);
+
+        let response = app
+            .oneshot(
+                Request::builder()
+                    .uri("/api/runtime/custom-world/agent/sessions")
+                    .body(Body::empty())
+                    .expect("request should build"),
+            )
+            .await
+            .expect("request should succeed");
+
+        assert_eq!(response.status(), StatusCode::SERVICE_UNAVAILABLE);
+        let body = read_json_response(response).await;
+        assert_eq!(
+            body["error"]["details"]["reason"],
+            "creation_entry_disabled"
+        );
+        assert_eq!(body["error"]["details"]["creationTypeId"], "rpg");
+    }
+
     #[tokio::test]
     async fn healthz_returns_standard_envelope_when_requested() {
         let app = build_router(AppState::new(AppConfig::default()).expect("state should build"));