Harden local config updates and error logging

internal/services/local_configuration.go

@@ -461,9 +461,21 @@ func (s *LocalConfigurationService) UpdateNoAuth(uuid string, req *CreateConfigR
 
 	projectUUID := localCfg.ProjectUUID
 	if req.ProjectUUID != nil {
+		requestedProjectUUID := strings.TrimSpace(*req.ProjectUUID)
+		currentProjectUUID := ""
+		if localCfg.ProjectUUID != nil {
+			currentProjectUUID = strings.TrimSpace(*localCfg.ProjectUUID)
+		}
+
 		projectUUID, err = s.resolveProjectUUID(localCfg.OriginalUsername, req.ProjectUUID)
 		if err != nil {
-			return nil, err
+			// Allow save for legacy/orphaned configs when request keeps the same project UUID.
+			// This can happen for imported configs whose project is not present in local cache.
+			if errors.Is(err, ErrProjectNotFound) && requestedProjectUUID != "" && requestedProjectUUID == currentProjectUUID {
+				projectUUID = localCfg.ProjectUUID
+			} else {
+				return nil, err
+			}
 		}
 	}
 	pricelistID, err := s.resolvePricelistID(req.PricelistID)
@@ -1001,13 +1013,17 @@ func (s *LocalConfigurationService) saveWithVersionAndPending(localCfg *localdb.
 				return fmt.Errorf("load current version before save: %w", err)
 			}
 
-			sameRevisionContent, err := s.hasSameRevisionContent(localCfg, currentVersion)
-			if err != nil {
-				return fmt.Errorf("compare revision content: %w", err)
-			}
-			if sameRevisionContent {
-				cfg = localdb.LocalToConfiguration(&locked)
-				return nil
+			// Legacy/orphaned rows may have empty or stale current_version_id.
+			// In that case we treat update as content-changing and append a fresh version.
+			if currentVersion != nil {
+				sameRevisionContent, err := s.hasSameRevisionContent(localCfg, currentVersion)
+				if err != nil {
+					return fmt.Errorf("compare revision content: %w", err)
+				}
+				if sameRevisionContent {
+					cfg = localdb.LocalToConfiguration(&locked)
+					return nil
+				}
 			}
 		}
 
@@ -1058,6 +1074,9 @@ func (s *LocalConfigurationService) loadCurrentVersionTx(tx *gorm.DB, localCfg *
 	if err := tx.Where("configuration_uuid = ?", localCfg.UUID).
 		Order("version_no DESC").
 		First(&version).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		}
 		return nil, err
 	}
 	return &version, nil