feat(queue): show ReplayGain metadata in current-track tech strip

Display track gain, album gain, and peak from file tags next to format,
bitrate, and sample rate so missing ReplayGain tags are obvious.

Refs: https://github.com/Psychotoxical/psysonic/issues/195

src/locales/zh.ts

@@ -843,6 +843,9 @@ export const zhTranslation = {
     trackPlural: '首曲目',
     showRemaining: '显示剩余时间',
     showTotal: '显示总时间',
+    rgTrack: '曲目 {{db}} dB',
+    rgAlbum: '专辑 {{db}} dB',
+    rgPeak: '峰值 {{pk}}',
   },
   statistics: {
     title: '统计',