fix: trim whitespace from metadata fields to prevent filename issues

go_backend/exports.go

@@ -5,6 +5,7 @@ package gobackend
 import (
 	"context"
 	"encoding/json"
+	"strings"
 	"time"
 )
 
@@ -124,6 +125,13 @@ func DownloadTrack(requestJSON string) (string, error) {
 		return errorResponse("Invalid request: " + err.Error())
 	}
 	
+	// Trim whitespace from string fields to prevent filename/path issues
+	req.TrackName = strings.TrimSpace(req.TrackName)
+	req.ArtistName = strings.TrimSpace(req.ArtistName)
+	req.AlbumName = strings.TrimSpace(req.AlbumName)
+	req.AlbumArtist = strings.TrimSpace(req.AlbumArtist)
+	req.OutputDir = strings.TrimSpace(req.OutputDir)
+	
 	var filePath string
 	var err error
 	
@@ -172,6 +180,13 @@ func DownloadWithFallback(requestJSON string) (string, error) {
 		return errorResponse("Invalid request: " + err.Error())
 	}
 	
+	// Trim whitespace from string fields to prevent filename/path issues
+	req.TrackName = strings.TrimSpace(req.TrackName)
+	req.ArtistName = strings.TrimSpace(req.ArtistName)
+	req.AlbumName = strings.TrimSpace(req.AlbumName)
+	req.AlbumArtist = strings.TrimSpace(req.AlbumArtist)
+	req.OutputDir = strings.TrimSpace(req.OutputDir)
+	
 	// Build service order starting with preferred service
 	allServices := []string{"tidal", "qobuz", "amazon"}
 	preferredService := req.Service

go_backend/filename.go

@@ -63,7 +63,8 @@ func buildFilenameFromTemplate(template string, metadata map[string]interface{})
 func getString(m map[string]interface{}, key string) string {
 	if v, ok := m[key]; ok {
 		if s, ok := v.(string); ok {
-			return s
+			// Trim leading/trailing whitespace to prevent filename issues
+			return strings.TrimSpace(s)
 		}
 	}
 	return ""