feat(settings): cross-tab fuzzy search + tab restructure polish (#263)

Cross-tab settings search:
- Static SETTINGS_INDEX covering every sub-section of every tab, with
  free-form keywords per entry so "scrobble" finds Last.fm, "replay gain"
  finds Playback, etc.
- matchScore() does substring-first ranking, falls back to a char-in-order
  fuzzy match so typos still yield hits.
- Active tab keeps its in-place hide/show filter; matches from other tabs
  render at the top as a clickable "In other tabs" list (tab badge +
  sub-section title). Clicking clears the query, switches tab, and scrolls
  + opens the target sub-section.
- All 8 locales updated: new searchOtherTabs key, searchNoResults reworded
  (old "try another tab" hint is now handled by the list itself).

Settings restructure polish:
- "Next Track Buffering" moved from Audio to the Storage tab — sits
  between Offline Library and Downloads.
- Storage tab label renamed across 8 locales: "Storage & Downloads" →
  "Offline & Cache" (equivalents per locale). nb locale was missing
  tabStorage entirely; added. Tab id stays 'storage' to avoid breaking
  persisted state.
- Library tab: Random Mix sub-section now opens by default (previously
  both sub-sections started collapsed) and is renamed "Random Mix
  Blacklist" in all 8 locales — the section is entirely a blacklist
  config, the old title was misleading.
- Lyrics tab:
  * Standard / YouLyPlus rows use the same toggle style as the "Show
    lyrics as static text" row and stack vertically. Order swapped so
    YouLyPlus is first.
  * Provider list (Server / LRCLIB / Netease) moved to appear directly
    under the Standard toggle as its sub-item, indented, instead of after
    the static-text toggle.
  * Classic / Apple Music-like rows likewise rebuilt as vertical toggle
    rows.
- One pre-existing typo carried in from #261 fixed along the way: the
  openAddServerInvite handler in Settings referenced the renamed tab id
  'server' (pre-#259) — now 'servers'. [Note: already landed in PR #262,
  keeping this commit clean of that.]

Co-authored-by: Psychotoxical <dev@psysonic.app>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/locales/zh.ts

@@ -669,7 +669,7 @@ export const zhTranslation = {
     aboutContributorsLabel: '贡献者',
     showChangelogOnUpdate: '更新时显示"新功能"',
     showChangelogOnUpdateDesc: '更新后在「正在播放」上方显示一个低调的更新日志横幅。点击打开发行说明，X 按钮关闭。',
-    randomMixTitle: '随机混音',
+    randomMixTitle: '随机混音黑名单',
     randomMixBlacklistTitle: '自定义过滤关键词',
     randomMixBlacklistDesc: '当任何关键词匹配流派、标题、专辑或艺术家时，歌曲将被排除（当上方复选框开启时生效）。',
     randomMixBlacklistPlaceholder: '添加关键词…',
@@ -677,7 +677,7 @@ export const zhTranslation = {
     randomMixBlacklistEmpty: '尚未添加自定义关键词。',
     randomMixHardcodedTitle: '内置关键词（复选框开启时生效）',
     tabAudio: '音频',
-    tabStorage: '存储与下载',
+    tabStorage: '离线与缓存',
     tabAppearance: '外观',
     tabLibrary: '媒体库',
     tabServers: '服务器',
@@ -688,7 +688,8 @@ export const zhTranslation = {
     aboutContributorsCount_one: '{{count}} 项贡献',
     aboutContributorsCount_other: '{{count}} 项贡献',
     searchPlaceholder: '搜索设置…',
-    searchNoResults: '此标签页中没有匹配的设置。请尝试其他标签页。',
+    searchNoResults: '没有设置匹配您的搜索。',
+    searchOtherTabs: '在其他标签页中',
     aboutMaintainersLabel: '维护者',
     integrationsPrivacyTitle: '隐私说明',
     integrationsPrivacyBody: '此标签页中的所有集成均为 <strong>选择加入</strong>，启用后会向外部服务或您的 Navidrome 服务器发送数据。Last.fm 接收您的收听历史，Discord 在您的个人资料中显示正在播放的曲目，Bandsintown 会按艺人查询以获取巡演日期，"正在播放" 分享会向您 Navidrome 服务器的其他用户公开您当前的曲目。如果您不需要这些功能，只需将相应部分保持停用即可。',