Fix downloading of forums with many pages

internal/services/fetcher/fetcher.go

@@ -5,6 +5,7 @@
 package fetcher
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -89,7 +90,7 @@ func download(topic *forumTopic) {
 }
 
 func fetch(forumID int) {
-	startPage := "https://" + c.Config.URL + "/forum/viewforum.php?f=" + strconv.Itoa(forumID)
+	startPage := fmt.Sprintf("https://%s/forum/viewforum.php?f=%d", c.Config.URL, forumID)
 
 	time.Sleep(5 * time.Second)
 
@@ -109,9 +110,7 @@ func fetch(forumID int) {
 
 	dlog.Info().Str("название форума", getForumName(forumPages[1])).Msg("Определён форум для загрузки")
 
-	getNavigation(forumPages[1])
-
-	downloadAdditionalPages()
+	downloadAdditionalPages(forumID)
 
 	for _, forumPage := range forumPages {
 		getTopics(forumPage)