fix: safe domains scan - use time.Time for timestamp columns instead of string

go-backend/internal/services/link_preview_service.go

@@ -15,6 +15,11 @@ import (
 	"github.com/rs/zerolog/log"
 )
 
+// formatTime formats a time.Time to a string for JSON output.
+func formatTime(t time.Time) string {
+	return t.Format(time.RFC3339)
+}
+
 // LinkPreview represents the OG metadata extracted from a URL.
 type LinkPreview struct {
 	URL         string `json:"link_preview_url"`
@@ -330,8 +335,8 @@ type SafeDomain struct {
 	Category   string    `json:"category"`
 	IsApproved bool      `json:"is_approved"`
 	Notes      *string   `json:"notes"`
-	CreatedAt  string  `json:"created_at"`
-	UpdatedAt  string  `json:"updated_at"`
+	CreatedAt  time.Time `json:"created_at"`
+	UpdatedAt  time.Time `json:"updated_at"`
 }
 
 // ListSafeDomains returns all safe domains, optionally filtered.
@@ -362,6 +367,7 @@ func (s *LinkPreviewService) ListSafeDomains(ctx context.Context, category strin
 	for rows.Next() {
 		var d SafeDomain
 		if err := rows.Scan(&d.ID, &d.Domain, &d.Category, &d.IsApproved, &d.Notes, &d.CreatedAt, &d.UpdatedAt); err != nil {
+			log.Warn().Err(err).Msg("Failed to scan safe domain row")
 			continue
 		}
 		domains = append(domains, d)