refactor: the server says a count one way, words.Count, for notifications, a wanted match's reason and the duplicate resolver's activity line (M505 #5643)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/wanted/match.go

@@ -13,6 +13,7 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/musicbrainz"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/release"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/tags"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/words"
 )
 
 // Matching a library album to its MusicBrainz release group (#5569).
@@ -262,8 +263,8 @@ func (s *Service) matchAlbum(ctx context.Context, a dbq.ListAlbumsToMatchRow, tr
 	if considered == 0 {
 		return albumMatch{Detail: fmt.Sprintf("MusicBrainz has no album called %q by %s.", a.Title, a.ArtistName)}, nil
 	}
-	detail := fmt.Sprintf("MusicBrainz has %d %s called %q by %s, but none has its tracks: the closest, %q, agrees on %d of its %d",
-		considered, plural(considered, "album", "albums"), a.Title, a.ArtistName, best.Title, max(bestN, 0), len(tracks))
+	detail := fmt.Sprintf("MusicBrainz has %s called %q by %s, but none has its tracks: the closest, %q, agrees on %d of its %d",
+		words.Count(considered, "album", "albums"), a.Title, a.ArtistName, best.Title, max(bestN, 0), len(tracks))
 	switch {
 	case bestN < 0:
 		detail += " (MusicBrainz lists no edition of it)"
@@ -403,10 +404,3 @@ func abs(n int) int {
 	}
 	return n
 }
-
-func plural(n int, one, many string) string {
-	if n == 1 {
-		return one
-	}
-	return many
-}