feat: 新增创作作品管理模块及相关配置

workflow/service/einograph/orchestration.go

@@ -0,0 +1,80 @@
+package einograph
+
+import (
+	"context"
+
+	"github.com/cloudwego/eino/compose"
+)
+
+// 节点名称常量
+const (
+	NodeInputAdapt  = "input_adapt"  // 输入适配
+	NodeBuildPrompt = "build_prompt" // 构建提示词
+	NodeGenText     = "gen_text"     // 大模型生成原始文案
+	NodeGenImage    = "gen_image"    // 生成图片 + HTML
+)
+
+// ==================== 构建流式图（已加入优化节点） ====================
+func BuildCreationGraph(ctx context.Context) (compose.Runnable[any, any], error) {
+	g := compose.NewGraph[any, any]()
+
+	// 1. 输入适配
+	err := g.AddLambdaNode(
+		NodeInputAdapt,
+		compose.InvokableLambda(InputAdaptLambda),
+		compose.WithOutputKey("input"),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	// 2. 构建提示词
+	err = g.AddLambdaNode(
+		NodeBuildPrompt,
+		compose.InvokableLambda(BuildPromptLambda),
+		compose.WithInputKey("input"),
+		compose.WithOutputKey("messages"),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	// 3. LLM 生成原始文案
+	chatModel, err := NewChatModel(ctx)
+	if err != nil {
+		return nil, err
+	}
+	err = g.AddChatModelNode(
+		NodeGenText,
+		chatModel,
+		compose.WithInputKey("messages"),
+		compose.WithOutputKey("text_result"),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	// 5. 生成图片 + HTML（使用优化后的文案）
+	err = g.AddLambdaNode(
+		NodeGenImage,
+		compose.InvokableLambda(GenerateImageLambda),
+		compose.WithInputKey("text_result"),
+		compose.WithOutputKey("output"),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	// ✅ 正确连线：优化节点必须放在生成文案之后、生成图片之前
+	_ = g.AddEdge(compose.START, NodeInputAdapt)
+	_ = g.AddEdge(NodeInputAdapt, NodeBuildPrompt)
+	_ = g.AddEdge(NodeBuildPrompt, NodeGenText)
+	_ = g.AddEdge(NodeGenText, NodeGenImage)
+	_ = g.AddEdge(NodeGenImage, compose.END)
+
+	// 编译
+	return g.Compile(ctx,
+		compose.WithGraphName("xiaohongshu_content_creation"),
+		compose.WithNodeTriggerMode(compose.AnyPredecessor),
+	)
+}