fix: add compose hostname aliases for Podman DNS

Ensure gateway can resolve platform/ai service names after restart on production.

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.yml

@@ -37,6 +37,8 @@ services:
       context: ./platform
       args:
         <<: *build_args
+    # Podman DNS：显式 hostname/别名，避免 gateway lookup platform 失败
+    hostname: platform
     depends_on:
       postgres:
         condition: service_healthy
@@ -48,12 +50,17 @@ services:
       - ./platform/etc/platform.docker.yaml:/app/etc/platform.yaml:ro
     environment:
       TZ: Asia/Shanghai
+    networks:
+      default:
+        aliases:
+          - platform
 
   ai:
     build:
       context: ./ai-service
       args:
         <<: *build_args
+    hostname: ai
     ports:
       - "${AIJZ_AI_PUBLISH:-127.0.0.1:8001}:8001"
     env_file:
@@ -77,12 +84,17 @@ services:
       MINIMAX_API_KEY: ${MINIMAX_API_KEY:-}
       PIP_INDEX_URL: https://pypi.tuna.tsinghua.edu.cn/simple
       PIP_TRUSTED_HOST: pypi.tuna.tsinghua.edu.cn
+    networks:
+      default:
+        aliases:
+          - ai
 
   gateway:
     build:
       context: ./gateway
       args:
         <<: *build_args
+    hostname: gateway
     depends_on:
       - platform
       - ai
@@ -93,9 +105,14 @@ services:
     environment:
       TZ: Asia/Shanghai
       GOPROXY: https://goproxy.cn,direct
+    networks:
+      default:
+        aliases:
+          - gateway
 
   web:
     image: ${DOCKER_BASE_REGISTRY:-docker.m.daocloud.io/library}/nginx:1.27-alpine
+    hostname: web
     depends_on:
       - gateway
     ports: