fix(ui): 修复下载歌曲时的搜索功能

- 将搜索关键词从 search_words 更改为 var7.get()，以确保搜索功能正确使用用户输入的关键词

NFLmusic.py

@@ -344,7 +344,7 @@ def delete():
             if var7.get() not in ["", lang.get(la, "ui.download.entry.song_name")]:
                 music_dir_filtered = []
                 for file in music_dir:
-                    if search_words in os.path.splitext(file)[0]:
+                    if var7.get() in os.path.splitext(file)[0]:
                         music_dir_filtered.append(file)
                 music_dir0 = music_dir_filtered
                 music_dir_without_endswith0 = [os.path.splitext(file)[0] for file in music_dir0 if