fix: zero-pad track numbers and show warning count in summary

internal/deezer/song.go

@@ -3,6 +3,7 @@ package deezer
 import (
 	"encoding/json"
 	"fmt"
+	"strconv"
 
 	"github.com/flytam/filenamify"
 )
@@ -54,7 +55,11 @@ func (s *Song) GetFileName(resourceType, mediaFormat string) string {
 
 	prefix := ""
 	if resourceType == "album" {
-		prefix = s.TrackNumber + ". "
+		if n, err := strconv.Atoi(s.TrackNumber); err == nil {
+			prefix = fmt.Sprintf("%02d. ", n)
+		} else {
+			prefix = s.TrackNumber + ". "
+		}
 	}
 
 	fileName := fmt.Sprintf("%s%s - %s.%s", prefix, s.Artist, s.GetTitle(), ext)

internal/downloader/progress.go

@@ -22,6 +22,7 @@ type downloadStats struct {
 	downloaded int
 	skipped    int
 	failed     int
+	warnings   int
 }
 
 type progressTracker struct {
@@ -71,6 +72,9 @@ func (pt *progressTracker) handleResult(index int, song *deezer.Song, result dow
 	}
 
 	pt.stats.downloaded++
+	if len(result.warnings) > 0 {
+		pt.stats.warnings++
+	}
 	pt.logger.Infof("Downloaded %s - %s\n", song.Artist, songTitle)
 
 	symbol := "✔"
@@ -92,11 +96,15 @@ func (pt *progressTracker) printSummary(resourceTitle, resourceID, outputDir str
 	}
 
 	if pt.resourceType != "track" {
+		warningsLine := ""
+		if pt.stats.warnings > 0 {
+			warningsLine = fmt.Sprintf("\nWarnings:       %d", pt.stats.warnings)
+		}
 		fmt.Printf(`
 ================== [ Summary ] ==================
 Downloaded:     %d
 Skipped:        %d
-Failed:         %d
+Failed:         %d%s
 Elapsed time:   %s
 Files saved to: %s
 =================================================
@@ -104,6 +112,7 @@ Files saved to: %s
 			pt.stats.downloaded,
 			pt.stats.skipped,
 			pt.stats.failed,
+			warningsLine,
 			elapsed.Round(time.Second),
 			outputDir,
 		)