feat(API): optional display name on users

api/handlers/auth/meHandler.go

@@ -3,6 +3,7 @@ package auth
 import (
 	"RenewCMS/api/pkg/apperr"
 	"RenewCMS/api/pkg/claims"
+	"RenewCMS/api/pkg/publicuser"
 	"RenewCMS/internal/domain/user"
 	"RenewCMS/internal/infrastructure/useCases"
 	"encoding/json"
@@ -37,7 +38,7 @@ func (h *MeHandler) Me(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	body, err := json.Marshal(newPublicUser(loadedUser))
+	body, err := json.Marshal(publicuser.New(loadedUser))
 	if err != nil {
 		http.Error(w, "Internal server error", http.StatusInternalServerError)
 		return