fix golint errors

internal/search/selector.go

@@ -22,19 +22,16 @@ type Selector struct {
 	logger *slog.Logger
 }
 
-func NewSelector(client *memos.Client, store *storage.Storage, cfg config.SearchConfig, loc *time.Location, logger *slog.Logger) *Selector {
+func NewSelector(client *memos.Client, store *storage.Storage, cfg *config.SearchConfig, loc *time.Location, logger *slog.Logger) *Selector {
 	return &Selector{
 		client: client,
 		store:  store,
-		cfg:    cfg,
+		cfg:    *cfg,
 		loc:    loc,
 		logger: logger,
 	}
 }
 
-// tierFunc returns date ranges for a given tier.
-type tierFunc func(today time.Time, maxYears int, loc *time.Location) []DateRange
-
 // Select runs the full search algorithm and returns one Memory for the given day.
 func (s *Selector) Select(ctx context.Context, today time.Time) (*Memory, error) {
 	weights := s.cfg.TierWeights.AsSlice()
@@ -248,7 +245,7 @@ func weightedTierOrder(weights [7]int) []int {
 			break
 		}
 
-		r := rand.IntN(totalWeight)
+		r := rand.IntN(totalWeight) //nolint:gosec // non-cryptographic use
 		cumulative := 0
 		for i, e := range remaining {
 			cumulative += e.weight