account page: can now reorder entries under shops sections by drag and drop

internal/server/response/write.go

@@ -1,6 +1,7 @@
 package response
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -45,6 +46,11 @@ func HandleErrors(c *gin.Context) {
 		}
 	}
 	if !ok {
+		var err error
+		for _, e := range c.Errors {
+			err = errors.Join(err, e)
+		}
+		c.String(http.StatusInternalServerError, err.Error())
 		return
 	}