deploy: route test API through host gateway

docker-compose.test.yml

@@ -8,6 +8,8 @@ services:
     restart: unless-stopped
     ports:
       - "${HOST_PORT:-9002}:80"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     environment:
-      # 测试环境 Gateway；迁移环境时可由 Jenkins 环境变量覆盖。
+      # Gateway 与前端容器在同一台测试服务器，通过宿主机内部地址访问。
-      API_UPSTREAM: "${API_UPSTREAM:-http://8.163.30.128:9000}"
+      API_UPSTREAM: "${API_UPSTREAM:-http://host.docker.internal:9000}"