fix: align oauth tunnel refresh transport

apps/aether-gateway/src/tests/control/admin/oauth.rs

@@ -4568,6 +4568,150 @@ async fn gateway_refreshes_admin_provider_oauth_key_locally_via_execution_runtim
     execution_runtime_handle.abort();
 }
 
+#[tokio::test]
+async fn gateway_refreshes_admin_provider_oauth_key_tunnel_proxy_without_follow_redirects_like_master(
+) {
+    let execution_plans = Arc::new(Mutex::new(Vec::<ExecutionPlan>::new()));
+    let execution_plans_clone = Arc::clone(&execution_plans);
+    let execution_runtime = Router::new().route(
+        "/v1/execute/sync",
+        any(move |Json(plan): Json<ExecutionPlan>| {
+            let execution_plans_inner = Arc::clone(&execution_plans_clone);
+            async move {
+                execution_plans_inner
+                    .lock()
+                    .expect("mutex should lock")
+                    .push(plan.clone());
+                if plan.request_id == "provider-oauth:local-refresh-token" {
+                    Json(json!({
+                        "request_id": plan.request_id,
+                        "status_code": 200,
+                        "headers": {
+                            "content-type": "application/json"
+                        },
+                        "body": {
+                            "json_body": {
+                                "access_token": "refreshed-codex-access-token",
+                                "refresh_token": "refreshed-codex-refresh-token",
+                                "token_type": "Bearer",
+                                "expires_in": 1800,
+                                "scope": "openid email profile offline_access",
+                                "email": "alice@example.com",
+                                "account_id": "acct-codex-123",
+                                "plan_type": "plus"
+                            }
+                        }
+                    }))
+                } else {
+                    Json(json!({
+                        "request_id": plan.request_id,
+                        "status_code": 200,
+                        "headers": {
+                            "content-type": "application/json"
+                        },
+                        "body": {
+                            "json_body": {}
+                        }
+                    }))
+                }
+            }
+        }),
+    );
+
+    let mut provider = sample_provider("provider-codex", "codex", 10);
+    provider.provider_type = "codex".to_string();
+    provider.proxy = Some(json!({
+        "mode": "tunnel",
+        "node_id": "proxy-node-tunnel",
+        "enabled": true,
+        "tunnel_base_url": "http://gateway-owner.internal"
+    }));
+    let endpoint = sample_endpoint(
+        "endpoint-codex-cli",
+        "provider-codex",
+        "openai:responses",
+        "https://chatgpt.com/backend-api/codex",
+    );
+
+    let mut key = sample_key(
+        "key-codex-oauth-refresh-tunnel",
+        "provider-codex",
+        "openai:responses",
+        "stale-codex-access-token",
+    );
+    key.auth_type = "oauth".to_string();
+    key.encrypted_auth_config = Some(
+        encrypt_python_fernet_plaintext(
+            DEVELOPMENT_ENCRYPTION_KEY,
+            r#"{"provider_type":"codex","refresh_token":"old-codex-refresh-token","email":"alice@example.com","account_id":"acct-codex-123","plan_type":"plus","expires_at":1}"#,
+        )
+        .expect("auth config ciphertext should build"),
+    );
+
+    let provider_catalog_repository = Arc::new(InMemoryProviderCatalogReadRepository::seed(
+        vec![provider],
+        vec![endpoint],
+        vec![key],
+    ));
+
+    let oauth_refresh =
+        crate::provider_transport::LocalOAuthRefreshCoordinator::with_adapters_for_tests(vec![
+            Arc::new(
+                crate::provider_transport::oauth_refresh::GenericOAuthRefreshAdapter::default()
+                    .with_token_url_for_tests("codex", "https://oauth.example/oauth/token"),
+            ),
+        ]);
+
+    let (execution_runtime_url, execution_runtime_handle) = start_server(execution_runtime).await;
+    let gateway = build_router_with_state(
+        build_state_with_execution_runtime_override(execution_runtime_url)
+            .with_data_state_for_tests(
+                GatewayDataState::with_provider_catalog_repository_for_tests(
+                    provider_catalog_repository,
+                )
+                .with_encryption_key_for_tests(DEVELOPMENT_ENCRYPTION_KEY),
+            )
+            .with_oauth_refresh_coordinator_for_tests(oauth_refresh),
+    );
+    let (gateway_url, gateway_handle) = start_server(gateway).await;
+
+    let response = reqwest::Client::new()
+        .post(format!(
+            "{gateway_url}/api/admin/provider-oauth/keys/key-codex-oauth-refresh-tunnel/refresh"
+        ))
+        .header(crate::constants::GATEWAY_HEADER, "rust-phase3b")
+        .header(TRUSTED_ADMIN_USER_ID_HEADER, "admin-user-123")
+        .header(TRUSTED_ADMIN_USER_ROLE_HEADER, "admin")
+        .header(TRUSTED_ADMIN_SESSION_ID_HEADER, "session-123")
+        .send()
+        .await
+        .expect("request should succeed");
+
+    assert_eq!(response.status(), StatusCode::OK);
+
+    let plans = execution_plans.lock().expect("mutex should lock");
+    let refresh_plan = plans
+        .iter()
+        .find(|plan| plan.request_id == "provider-oauth:local-refresh-token")
+        .expect("local refresh plan should exist");
+    assert_eq!(
+        refresh_plan
+            .proxy
+            .as_ref()
+            .and_then(|proxy| proxy.mode.as_deref()),
+        Some("tunnel")
+    );
+    assert_eq!(
+        refresh_plan
+            .headers
+            .get(EXECUTION_REQUEST_FOLLOW_REDIRECTS_HEADER),
+        None
+    );
+
+    gateway_handle.abort();
+    execution_runtime_handle.abort();
+}
+
 #[tokio::test]
 async fn gateway_consecutive_manual_oauth_refresh_uses_rotated_refresh_token() {
     let refresh_request_bodies = Arc::new(Mutex::new(Vec::<String>::new()));