优化页面、修复BUG

server/utils/response.go

@@ -31,14 +31,9 @@ func SuccessWithMsg(c *gin.Context, msg string, result interface{}) {
 	})
 }
 
-// Error 错误响应 (默认 Code 400)
+// Error 错误响应，HTTP 状态恒为 200，通过 code 区分业务状态
 func Error(c *gin.Context, code int, msg string) {
-	httpStatus := http.StatusBadRequest
-	if code == 500 {
-		httpStatus = http.StatusInternalServerError
-	}
-
-	c.JSON(httpStatus, Response{
+	c.JSON(http.StatusOK, Response{
 		Code:    code,
 		Message: msg,
 		Result:  nil,
@@ -47,7 +42,7 @@ func Error(c *gin.Context, code int, msg string) {
 
 // ServerError 服务器错误 (Code 500)
 func ServerError(c *gin.Context, err error) {
-	c.JSON(http.StatusInternalServerError, Response{
+	c.JSON(http.StatusOK, Response{
 		Code:    500,
 		Message: err.Error(),
 		Result:  nil,

server/utils/visitor.go

@@ -0,0 +1,17 @@
+package utils
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+)
+
+// GetOrSetVisitorID returns an anonymous visitor identifier from cookie, creating one if missing.
+func GetOrSetVisitorID(c *gin.Context) string {
+	if cookie, err := c.Cookie("visitor_id"); err == nil && cookie != "" {
+		return cookie
+	}
+
+	id := uuid.New().String()
+	c.SetCookie("visitor_id", id, 365*24*3600, "/", "", false, true)
+	return id
+}