Method GetTopPreferences

pkg/memory/preference.go:286–312

GetTopPreferences 获取强度最高的 N 个偏好

(
	ctx context.Context,
	userID string,
	limit int,
)

// GetTopPreferences 获取强度最高的 N 个偏好
func (pm *PreferenceManager) GetTopPreferences(
	ctx context.Context,
	userID string,
	limit int,
) ([]*Preference, error) {
	pm.mu.RLock()
	defer pm.mu.RUnlock()

	prefs := pm.preferences[userID]
	if len(prefs) == 0 {
		return []*Preference{}, nil
	}

	// 复制并排序
	sorted := make([]*Preference, len(prefs))
	copy(sorted, prefs)

	sort.Slice(sorted, func(i, j int) bool {
		return sorted[i].Strength > sorted[j].Strength
	})

	if limit > len(sorted) {
		limit = len(sorted)
	}

	return sorted[:limit], nil
}

// ApplyDecay 应用强度衰减
func (pm *PreferenceManager) ApplyDecay(ctx context.Context) int {