fix(pr-review): address review findings for music folder filter

- Sidebar.tsx: title={} → data-tooltip + data-tooltip-pos="right" on
  scope subtitle (CLAUDE.md rule: never use native title= for tooltips)

- authStore.ts: merge two set() calls in setMusicFolders into one atomic
  update — avoids double render on folder list arrival

- locales (all 7): remove dead libraryScopeHint key (defined but never
  rendered in any component)

- Genres.tsx: remove musicLibraryFilterVersion from effect deps —
  getGenres is intentionally not folder-scoped, re-fetching on filter
  change was a no-op waste

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/locales/de.ts

@@ -24,7 +24,6 @@ export const deTranslation = {
     playlists: 'Playlists',
     radio: 'Internetradio',
     libraryScope: 'Bibliotheksumfang',
-    libraryScopeHint: 'Gesamten Server-Katalog oder nur einen Medienordner durchsuchen.',
     allLibraries: 'Alle Bibliotheken',
   },
   home: {

src/locales/en.ts

@@ -24,7 +24,6 @@ export const enTranslation = {
     playlists: 'Playlists',
     radio: 'Internet Radio',
     libraryScope: 'Library scope',
-    libraryScopeHint: 'Browse either your whole server catalog or a single media folder.',
     allLibraries: 'All libraries',
   },
   home: {

src/locales/fr.ts

@@ -24,7 +24,6 @@ export const frTranslation = {
     playlists: 'Playlists',
     radio: 'Radio Internet',
     libraryScope: 'Portée de la bibliothèque',
-    libraryScopeHint: 'Parcourir tout le catalogue du serveur ou un seul dossier média.',
     allLibraries: 'Toutes les bibliothèques',
   },
   home: {

src/locales/nb.ts

@@ -24,7 +24,6 @@ export const nbTranslation = {
     playlists: 'Spillelister',
     radio: 'Internettradio',
     libraryScope: 'Biblioteksomfang',
-    libraryScopeHint: 'Vis hele serverkatalogen eller én mediemappe.',
     allLibraries: 'Alle biblioteker',
   },
   home: {

src/locales/nl.ts

@@ -24,7 +24,6 @@ export const nlTranslation = {
     playlists: 'Playlists',
     radio: 'Internetradio',
     libraryScope: 'Bibliotheekbereik',
-    libraryScopeHint: 'Doorzoek de hele servercatalogus of één mediabibliotheek.',
     allLibraries: 'Alle bibliotheken',
   },
   home: {

src/locales/ru.ts

@@ -25,7 +25,6 @@ export const ruTranslation = {
     playlists: 'Плейлисты',
     radio: 'Онлайн-радио',
     libraryScope: 'Область медиатеки',
-    libraryScopeHint: 'Показывать весь каталог сервера или только одну медиапапку.',
     allLibraries: 'Все библиотеки',
   },
   home: {

src/locales/zh.ts

@@ -24,7 +24,6 @@ export const zhTranslation = {
     playlists: '播放列表',
     radio: '网络电台',
     libraryScope: '资料库范围',
-    libraryScopeHint: '浏览整个服务器目录或仅单个媒体文件夹。',
     allLibraries: '所有资料库',
   },
   home: {