refactor: Update user model to use 'any' type for updates and adjust DTO path in configuration

backend/internal/models/user.go

@@ -454,7 +454,7 @@ func UpdateUser(ctx context.Context, update UserUpdate) (*User, error) {
 			}
 
 			// Update salt and hash directly in the model
-			if err := tx.Model(user).Updates(map[string]interface{}{
+			if err := tx.Model(user).Updates(map[string]any{
 				"salt": pwData.Salt,
 				"hash": pwData.Hash,
 			}).Error; err != nil {
@@ -463,7 +463,7 @@ func UpdateUser(ctx context.Context, update UserUpdate) (*User, error) {
 		}
 
 		// Create map for generic update
-		updates := make(map[string]interface{})
+		updates := make(map[string]any)
 
 		// Add only non-password fields to the update
 		if update.Email != nil {