fix golint errors

internal/memos/client.go

@@ -43,7 +43,7 @@ func (c *Client) ListMemos(ctx context.Context, filter string, pageSize int, pag
 	}
 	u.RawQuery = q.Encode()
 
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), http.NoBody)
 	if err != nil {
 		return nil, fmt.Errorf("create request: %w", err)
 	}
@@ -79,7 +79,7 @@ func (c *Client) DownloadAttachment(ctx context.Context, att Attachment) ([]byte
 		needsAuth = true
 	}
 
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, reqURL, nil)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, reqURL, http.NoBody)
 	if err != nil {
 		return nil, fmt.Errorf("create request: %w", err)
 	}

internal/search/scoring.go

@@ -54,7 +54,7 @@ func weightedSelect(candidates []candidate, preferOlder bool, maxYearsBack int)
 		total += score
 	}
 
-	r := rand.Float64() * total
+	r := rand.Float64() * total //nolint:gosec // non-cryptographic use
 	var cumulative float64
 	for i, s := range scores {
 		cumulative += s

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

internal/storage/history.go

@@ -43,7 +43,7 @@ func (s *Storage) GetShowCounts(ctx context.Context, memoNames []string) (map[st
 		args[i] = name
 	}
 
-	query := fmt.Sprintf(
+	query := fmt.Sprintf( //nolint:gosec // placeholders are always "?"
 		`SELECT memo_name, COUNT(*) FROM show_history WHERE memo_name IN (%s) GROUP BY memo_name`,
 		strings.Join(placeholders, ","))
 

internal/storage/storage.go

@@ -5,7 +5,7 @@ import (
 	"database/sql"
 	"fmt"
 
-	_ "modernc.org/sqlite"
+	_ "modernc.org/sqlite" // SQLite driver
 )
 
 type Storage struct {

internal/telegram/bot.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"log/slog"
+	"strconv"
 	"strings"
 	"time"
 
@@ -93,8 +94,12 @@ func (b *Bot) nextSendTime() time.Time {
 	hour := 9
 	minute := 0
 	if len(parts) == 2 {
-		fmt.Sscanf(parts[0], "%d", &hour)
-		fmt.Sscanf(parts[1], "%d", &minute)
+		if h, err := strconv.Atoi(parts[0]); err == nil {
+			hour = h
+		}
+		if m, err := strconv.Atoi(parts[1]); err == nil {
+			minute = m
+		}
 	}
 
 	target := time.Date(now.Year(), now.Month(), now.Day(), hour, minute, 0, 0, b.loc)
@@ -185,7 +190,7 @@ type imageFile struct {
 
 // downloadImages downloads image attachments, skipping failures.
 func (b *Bot) downloadImages(ctx context.Context, attachments []memos.Attachment) []imageFile {
-	var files []imageFile
+	files := make([]imageFile, 0, len(attachments))
 	for _, att := range attachments {
 		data, err := b.client.DownloadAttachment(ctx, att)
 		if err != nil {

internal/telegram/format.go

@@ -41,7 +41,7 @@ func formatMemory(mem *search.Memory, publicURL string) (mainText, captionText s
 
 	// Link to original
 	memoURL := fmt.Sprintf("%s/%s", publicURL, mem.Memo.Name)
-	b.WriteString(fmt.Sprintf("\n\n<a href=\"%s\">Оригинал</a>", memoURL))
+	b.WriteString("\n\n<a href=\"" + memoURL + "\">Оригинал</a>")
 
 	full := b.String()
 	mainText = truncateHTML(full, maxMessageLen)

internal/web/handler.go

@@ -80,21 +80,25 @@ func (h *Handler) handleMemory(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		h.logger.Error("failed to get memory", "error", err)
 		w.WriteHeader(http.StatusInternalServerError)
-		templates.ExecuteTemplate(w, "error.html", errorData{
+		if err := templates.ExecuteTemplate(w, "error.html", errorData{
 			Message: "Не удалось загрузить воспоминание",
-		})
+		}); err != nil {
+			h.logger.Error("template render failed", "error", err)
+		}
 		return
 	}
 
 	if mem == nil {
 		w.WriteHeader(http.StatusOK)
-		templates.ExecuteTemplate(w, "error.html", errorData{
+		if err := templates.ExecuteTemplate(w, "error.html", errorData{
 			Message: "Нет заметок для воспоминания",
-		})
+		}); err != nil {
+			h.logger.Error("template render failed", "error", err)
+		}
 		return
 	}
 
-	var images []imageData
+	images := make([]imageData, 0, len(mem.Memo.Attachments))
 	for _, att := range mem.Memo.Attachments {
 		if !att.IsImage() {
 			continue