后端容器以宿主用户运行，日志权限修复；移除未使用的 backend-data 卷

docker-compose.yml

@@ -32,6 +32,8 @@ services:
         GOSUMDB: ${GOSUMDB:-sum.golang.google.cn}
         ALPINE_MIRROR: ${ALPINE_MIRROR:-https://mirrors.aliyun.com/alpine}
     image: affiliate-backend:latest
+    # 以宿主用户身份运行，日志文件归属正确（宿主机 logs 目录需预先 chown）
+    user: "${HOST_UID:-1000}:${HOST_GID:-1001}"
     ports:
       - "8080:8080"
     environment:
@@ -56,7 +58,6 @@ services:
       - CALLBACK_PUSH_TIMEOUT_SECONDS=${CALLBACK_PUSH_TIMEOUT_SECONDS:-15}
       - CALLBACK_RETRY_SCHEDULE=${CALLBACK_RETRY_SCHEDULE:-}
     volumes:
-      - backend-data:/data
       - ./logs:/app/logs
     restart: unless-stopped
     healthcheck:
@@ -94,6 +95,5 @@ services:
 volumes:
   postgres-data:
     name: ${POSTGRES_DATA_VOLUME:-affiliate_dash_postgres_data}
-  backend-data:
   caddy-data:
   caddy-config: