Method UpdatePreference

pkg/memory/preference.go:230–249

UpdatePreference 更新偏好

(
	ctx context.Context,
	userID string,
	category PreferenceCategory,
	key string,
	value string,
)

// UpdatePreference 更新偏好
func (pm *PreferenceManager) UpdatePreference(
	ctx context.Context,
	userID string,
	category PreferenceCategory,
	key string,
	value string,
) error {
	pm.mu.Lock()
	defer pm.mu.Unlock()

	pref := pm.findExistingPreference(userID, category, key)
	if pref == nil {
		return errors.New("preference not found")
	}

	pref.Value = value
	pref.UpdatedAt = time.Now()

	return nil
}

// DeletePreference 删除偏好
func (pm *PreferenceManager) DeletePreference(