增加歌曲命名格式选项

src/decrypt/mflac.js

@@ -36,6 +36,7 @@ async function Decrypt(file, raw_filename, raw_ext) {
         filename: info.filename,
         title: info.title,
         artist: info.artist,
+        ext: 'flac',
         album: tag.common.album,
         picture: picUrl,
         file: musicUrl,

src/decrypt/ncm.js

@@ -56,6 +56,7 @@ async function Decrypt(file) {
         filename: filename,
         title: musicMeta.musicName,
         artist: artists.join(" & "),
+        ext: musicMeta.format,
         album: musicMeta.album,
         picture: musicMeta.albumPic,
         file: musicUrl,

src/decrypt/qmc.js

@@ -50,6 +50,7 @@ async function Decrypt(file, raw_filename, raw_ext) {
         filename: info.filename,
         title: info.title,
         artist: info.artist,
+        ext: new_ext,
         album: tag.common.album,
         picture: picUrl,
         file: musicUrl,

src/decrypt/raw.js

@@ -17,6 +17,7 @@ async function Decrypt(file, raw_filename, raw_ext) {
         filename: info.filename,
         title: info.title,
         artist: info.artist,
+        ext: raw_ext,
         album: tag.common.album,
         picture: picUrl,
         file: fileUrl,