Version: 0.4.0.dev.260302

修改了gitignore文件，使得yaml不会被上传，保护隐私
接入eino，实现了agent的消息sse流式传输

backend/api/agent.go

@@ -0,0 +1,56 @@
+package api
+
+import (
+	"io"
+	"net/http"
+
+	"github.com/LoveLosita/smartflow/backend/model"
+	"github.com/LoveLosita/smartflow/backend/respond"
+	"github.com/LoveLosita/smartflow/backend/service"
+	"github.com/gin-gonic/gin"
+)
+
+type AgentHandler struct {
+	svc *service.AgentService
+}
+
+// NewAgentHandler 组装 Handler 的“工厂”
+func NewAgentHandler(svc *service.AgentService) *AgentHandler {
+	return &AgentHandler{
+		svc: svc, // 把传进来的 Service 揣进口袋里
+	}
+}
+
+func (api *AgentHandler) ChatAgent(c *gin.Context) {
+	// 1. 设置请求头
+	c.Writer.Header().Set("Content-Type", "text/event-stream")
+	c.Writer.Header().Set("Cache-Control", "no-cache")
+	c.Writer.Header().Set("Connection", "keep-alive")
+	c.Writer.Header().Set("Transfer-Encoding", "chunked")
+	// 2. 从请求中获取用户输入
+	var req model.UserSendMessageRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, respond.WrongParamType)
+		return
+	}
+	// 3. 调用 Service 层的聊天方法，获取输出通道和错误通道
+	outChan, errChan := api.svc.AgentChat(c.Request.Context(), req.Message)
+	// 4. 循环转发消息/错误
+	c.Stream(func(w io.Writer) bool {
+		select {
+		case err, ok := <-errChan:
+			if ok && err != nil {
+				respond.DealWithError(c, err)
+			}
+			return false
+		case msg, ok := <-outChan:
+			if !ok {
+				return false
+			}
+			c.SSEvent("message", msg) // 发送 SSE 格式消息
+			return true
+		case <-c.Request.Context().Done():
+			return false
+		}
+	})
+}