build(docker): build frontend and server inside container; remove host build deps

scripts/prod-build.sh

@@ -2,21 +2,13 @@
 set -euo pipefail
 
 echo "[Dream-Machine] 生产镜像构建"
-echo "- 环境要求: 前端包 dist/ 已在宿主机构建完成"
+echo "- 在容器内编译前端与后端"
 echo "- 目标平台: linux/amd64"
 
 SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
 ROOT_DIR=$(cd "$SCRIPT_DIR/.." && pwd)
 
-if [ ! -d "$ROOT_DIR/dist" ]; then
-  echo "[错误] 未检测到 dist/。请先在宿主机运行: pnpm run build"
-  exit 1
-fi
-
-echo "[步骤] 安装并构建后端 (宿主机)"
-(cd "$ROOT_DIR/server" && pnpm install && pnpm run build)
-
-echo "[步骤] 构建生产镜像 (仅打包、禁止在容器内构建)"
+echo "[步骤] 构建生产镜像 (容器内完成所有构建)"
 (cd "$ROOT_DIR/docker" && docker buildx build --platform linux/amd64 -f Dockerfile.prod -t dm-purchase-api:prod ..)
 
 echo "[完成] 镜像: dm-purchase-api:prod"