feat: redirect to login page if login expired

middleware/auth.go

@@ -14,7 +14,7 @@ func authHelper(c *gin.Context, minRole int) {
 	id := session.Get("id")
 	status := session.Get("status")
 	if username == nil {
-		c.JSON(http.StatusOK, gin.H{
+		c.JSON(http.StatusUnauthorized, gin.H{
 			"success": false,
 			"message": "无权进行此操作，未登录",
 		})