fix(i18n): backfill shortcut labels for #435 in 7 locales (#436)

* fix(i18n): backfill 10 settings.shortcut* keys for #435

PR #435 added 10 new settings.shortcut* labels to en.ts (start search,
advanced search, toggle sidebar, mute, equalizer, repeat, open now
playing, lyrics, favorite current track, open help) but left the other
7 locales without translations — i18next would fall back to English at
runtime.

Adding translations for de, fr, nl, zh, nb, ru, es in the same position
as en.ts (right after shortcutOpenMiniPlayer), styled after the
existing shortcut* entries in each locale.

* docs(changelog): add #435 shortcuts action-registry entry

* chore(credits): add #435 to cucadmuh's contributions

src/locales/zh.ts

@@ -820,6 +820,16 @@ export const zhTranslation = {
     shortcutFullscreenPlayer: '全屏播放器',
     shortcutNativeFullscreen: '原生全屏',
     shortcutOpenMiniPlayer: '打开迷你播放器',
+    shortcutStartSearch: '开始搜索',
+    shortcutStartAdvancedSearch: '开始高级搜索',
+    shortcutToggleSidebar: '切换侧边栏',
+    shortcutMuteSound: '静音',
+    shortcutToggleEqualizer: '打开 / 切换均衡器',
+    shortcutToggleRepeat: '切换循环',
+    shortcutOpenNowPlaying: '打开"正在播放"',
+    shortcutShowLyrics: '显示歌词',
+    shortcutFavoriteCurrentTrack: '将当前曲目添加到收藏',
+    shortcutOpenHelp: '帮助',
     playbackTitle: '播放',
     replayGain: '回放增益',
     replayGainDesc: '使用 ReplayGain 元数据标准化曲目音量',