feat(build): 添加传统 Docker 构建方式和诊断功能

- 在 build-offline.sh 脚本中添加 --pull=false 参数并改进错误处理
- 为 Makefile.offline.mk 中的各个服务构建任务添加 --pull=false 参数
- 新增 build-offline-classic.sh 脚本，提供不使用 BuildKit 的传统构建方式
- 新增 build-offline-v2.sh 脚本，提供增强版 BuildKit 离线构建功能
- 新增 diagnose.sh 脚本，用于诊断离线构建环境状态
- 在 Makefile 中添加 offline-build-classic 和 offline-diagnose

Makefile.offline.mk

@@ -161,12 +161,7 @@ _offline-build-services: ensure-buildx
 	@echo "构建 datamate-database..."
 	@docker buildx build \
 		--cache-from type=local,src=$(CACHE_DIR)/buildkit/database-cache \
-		--network=none \
-		-f scripts/images/database/Dockerfile \
-		-t datamate-database:$(OFFLINE_VERSION) \
-		--load . 2>/dev/null || echo "  Warning: database build may need network, retrying without --network=none..."
-	@docker buildx build \
-		--cache-from type=local,src=$(CACHE_DIR)/buildkit/database-cache \
+		--pull=false \
 		-f scripts/images/database/Dockerfile \
 		-t datamate-database:$(OFFLINE_VERSION) \
 		--load . || echo "  Failed"
@@ -175,6 +170,7 @@ _offline-build-services: ensure-buildx
 	@echo "构建 datamate-gateway..."
 	@docker buildx build \
 		--cache-from type=local,src=$(CACHE_DIR)/buildkit/gateway-cache \
+		--pull=false \
 		-f scripts/images/gateway/Dockerfile \
 		-t datamate-gateway:$(OFFLINE_VERSION) \
 		--load . || echo "  Failed"
@@ -183,6 +179,7 @@ _offline-build-services: ensure-buildx
 	@echo "构建 datamate-backend..."
 	@docker buildx build \
 		--cache-from type=local,src=$(CACHE_DIR)/buildkit/backend-cache \
+		--pull=false \
 		-f scripts/images/backend/Dockerfile \
 		-t datamate-backend:$(OFFLINE_VERSION) \
 		--load . || echo "  Failed"
@@ -191,6 +188,7 @@ _offline-build-services: ensure-buildx
 	@echo "构建 datamate-frontend..."
 	@docker buildx build \
 		--cache-from type=local,src=$(CACHE_DIR)/buildkit/frontend-cache \
+		--pull=false \
 		-f scripts/images/frontend/Dockerfile \
 		-t datamate-frontend:$(OFFLINE_VERSION) \
 		--load . || echo "  Failed"
@@ -199,6 +197,7 @@ _offline-build-services: ensure-buildx
 	@echo "构建 datamate-runtime..."
 	@docker buildx build \
 		--cache-from type=local,src=$(CACHE_DIR)/buildkit/runtime-cache \
+		--pull=false \
 		--build-arg RESOURCES_DIR=$(CACHE_DIR)/resources \
 		-f scripts/images/runtime/Dockerfile \
 		-t datamate-runtime:$(OFFLINE_VERSION) \
@@ -208,6 +207,7 @@ _offline-build-services: ensure-buildx
 	@echo "构建 datamate-backend-python..."
 	@docker buildx build \
 		--cache-from type=local,src=$(CACHE_DIR)/buildkit/backend-python-cache \
+		--pull=false \
 		--build-arg RESOURCES_DIR=$(CACHE_DIR)/resources \
 		-f scripts/images/backend-python/Dockerfile \
 		-t datamate-backend-python:$(OFFLINE_VERSION) \
@@ -218,7 +218,7 @@ _offline-build-services: ensure-buildx
 	@echo "✓ 离线构建完成"
 	@echo "======================================"
 
-# 单个服务离线构建
+# 单个服务离线构建 (BuildKit)
 .PHONY: %-offline-build
 %-offline-build: offline-setup ensure-buildx
 	@echo "离线构建 $*..."
@@ -229,11 +229,23 @@ _offline-build-services: ensure-buildx
 	@$(eval IMAGE_NAME := $(if $(filter deer-flow%,$*),$*,datamate-$*))
 	@docker buildx build \
 		--cache-from type=local,src=$(CACHE_DIR)/buildkit/$*-cache \
+		--pull=false \
 		$(if $(filter runtime backend-python deer-flow%,$*),--build-arg RESOURCES_DIR=$(CACHE_DIR)/resources,) \
 		-f scripts/images/$*/Dockerfile \
 		-t $(IMAGE_NAME):$(OFFLINE_VERSION) \
 		--load .
 
+# 传统 Docker 构建（不使用 BuildKit，更稳定）
+.PHONY: offline-build-classic
+offline-build-classic: offline-setup
+	@echo "使用传统 docker build 进行离线构建..."
+	@bash scripts/offline/build-offline-classic.sh $(CACHE_DIR) $(OFFLINE_VERSION)
+
+# 诊断离线环境
+.PHONY: offline-diagnose
+offline-diagnose:
+	@bash scripts/offline/diagnose.sh $(CACHE_DIR)
+
 # ========== 帮助 ==========
 
 .PHONY: help-offline
@@ -241,9 +253,11 @@ help-offline:
 	@echo "离线构建命令:"
 	@echo "  make offline-export [CACHE_DIR=./build-cache]       - 在有网环境导出构建缓存"
 	@echo "  make offline-setup [CACHE_DIR=./build-cache]        - 解压并准备离线缓存"
-	@echo "  make offline-build [CACHE_DIR=./build-cache]        - 在无网环境构建所有服务"
+	@echo "  make offline-build [CACHE_DIR=./build-cache]        - 在无网环境构建所有服务(BuildKit)"
+	@echo "  make offline-build-classic                          - 使用传统 docker build（更稳定）"
 	@echo "  make <service>-offline-build                        - 离线构建单个服务"
 	@echo "                                                      (如: make backend-offline-build)"
+	@echo "  make offline-diagnose                               - 诊断离线构建环境"
 	@echo ""
 	@echo "完整工作流程:"
 	@echo "  # 1. 有网环境导出缓存"
@@ -252,6 +266,8 @@ help-offline:
 	@echo "  # 2. 传输缓存到无网环境"
 	@echo "  scp build-cache-*.tar.gz user@offline-server:/path/to/project/"
 	@echo ""
-	@echo "  # 3. 无网环境构建"
+	@echo "  # 3. 无网环境构建（推荐先用传统方式）"
 	@echo "  tar -xzf build-cache-*.tar.gz"
-	@echo "  make offline-build"
+	@echo "  make offline-diagnose       # 检查环境"
+	@echo "  make offline-build-classic  # 传统构建（推荐）"
+	@echo "  # 或 make offline-build     # BuildKit 构建"