feat(themes): add follow-system mode to the theme scheduler (#1163)

* feat(themes): add follow-system mode to the theme scheduler

The theme scheduler can now switch the day/night theme pair by the OS
light/dark preference instead of a clock schedule. A segmented control
picks the trigger; in system mode the time inputs are hidden and the two
theme pickers read as Light/Dark.

The OS theme is read via the native Tauri window theme API (theme() +
onThemeChanged) rather than the Web prefers-color-scheme media query,
which is unreliable through WebKitGTK on Linux. Live updates land
instantly where the platform forwards them; on Linux setups that don't,
a hint notes the change applies after an app restart.

* docs(changelog): add follow-system theme mode entry (#1163)

CHANGELOG Added entry, contributor credit and What's New highlight for the
theme scheduler's new system-theme mode.

src/locales/de/settings.ts

@@ -650,12 +650,18 @@ export const settings = {
   seekbarRetrotape: 'Retro-Band',
   themeSchedulerTitle: 'Theme-Zeitplan',
   themeSchedulerEnable: 'Theme-Zeitplan aktivieren',
-  themeSchedulerEnableSub: 'Wechselt automatisch zwischen zwei Themes basierend auf der Uhrzeit',
+  themeSchedulerEnableSub: 'Wechselt automatisch zwischen zwei Themes – nach Uhrzeit oder System-Theme',
   themeSchedulerDayTheme: 'Tages-Theme',
   themeSchedulerDayStart: 'Tag beginnt um',
   themeSchedulerNightTheme: 'Nacht-Theme',
   themeSchedulerNightStart: 'Nacht beginnt um',
   themeSchedulerActiveHint: 'Theme-Zeitplan ist aktiv - Themes werden automatisch gewechselt.',
+  themeSchedulerModeLabel: 'Wechseln nach',
+  themeSchedulerModeTime: 'Uhrzeit',
+  themeSchedulerModeSystem: 'System-Theme',
+  themeSchedulerLightTheme: 'Helles Theme',
+  themeSchedulerDarkTheme: 'Dunkles Theme',
+  themeSchedulerSystemRestartHint: 'Ein Wechsel des System-Designs (hell/dunkel) wird erst nach einem Neustart der App übernommen.',
   visualOptionsTitle: 'Visuelle Optionen',
   coverArtBackground: 'Cover-Hintergrund',
   coverArtBackgroundSub: 'Zeigt verschwommenes Cover als Hintergrund in Album/Playlist-Kopfzeilen',

src/locales/en/settings.ts

@@ -717,12 +717,18 @@ export const settings = {
   seekbarRetrotape: 'Retro Tape',
   themeSchedulerTitle: 'Auto-Switch Theme',
   themeSchedulerEnable: 'Enable Theme Scheduler',
-  themeSchedulerEnableSub: 'Automatically switch between two themes based on the time of day',
+  themeSchedulerEnableSub: 'Automatically switch between two themes based on the time of day or your system theme',
   themeSchedulerDayTheme: 'Day Theme',
   themeSchedulerDayStart: 'Day Starts At',
   themeSchedulerNightTheme: 'Night Theme',
   themeSchedulerNightStart: 'Night Starts At',
   themeSchedulerActiveHint: 'Theme Scheduler is active - theme changes are managed automatically.',
+  themeSchedulerModeLabel: 'Switch Based On',
+  themeSchedulerModeTime: 'Time of Day',
+  themeSchedulerModeSystem: 'System Theme',
+  themeSchedulerLightTheme: 'Light Theme',
+  themeSchedulerDarkTheme: 'Dark Theme',
+  themeSchedulerSystemRestartHint: 'Changing your system light/dark setting takes effect after restarting the app.',
   visualOptionsTitle: 'Visual Options',
   coverArtBackground: 'Cover Art Background',
   coverArtBackgroundSub: 'Show blurred cover art as background in album/playlist headers',

src/locales/es/settings.ts

@@ -649,12 +649,18 @@ export const settings = {
   seekbarRetrotape: 'Cinta Retro',
   themeSchedulerTitle: 'Cambio Automático de Tema',
   themeSchedulerEnable: 'Habilitar Programador de Temas',
-  themeSchedulerEnableSub: 'Cambia automáticamente entre dos temas según la hora del día',
+  themeSchedulerEnableSub: 'Cambia automáticamente entre dos temas según la hora del día o el tema del sistema',
   themeSchedulerDayTheme: 'Tema de Día',
   themeSchedulerDayStart: 'Comienza de Día A las',
   themeSchedulerNightTheme: 'Tema de Noche',
   themeSchedulerNightStart: 'Comienza de Noche A las',
   themeSchedulerActiveHint: 'El Programador de Temas está activo — los cambios de tema se manejan automáticamente.',
+  themeSchedulerModeLabel: 'Cambiar según',
+  themeSchedulerModeTime: 'Hora del día',
+  themeSchedulerModeSystem: 'Tema del sistema',
+  themeSchedulerLightTheme: 'Tema claro',
+  themeSchedulerDarkTheme: 'Tema oscuro',
+  themeSchedulerSystemRestartHint: 'Cambiar el ajuste claro/oscuro del sistema se aplica tras reiniciar la aplicación.',
   visualOptionsTitle: 'Opciones Visuales',
   coverArtBackground: 'Fondo de Portada',
   coverArtBackgroundSub: 'Mostrar portada desenfocada como fondo en encabezados de álbumes y listas de reproducción',

src/locales/fr/settings.ts

@@ -637,12 +637,18 @@ export const settings = {
   seekbarRetrotape: 'Bande rétro',
   themeSchedulerTitle: 'Planificateur de thème',
   themeSchedulerEnable: 'Activer le planificateur de thème',
-  themeSchedulerEnableSub: 'Bascule automatiquement entre deux thèmes selon l\'heure',
+  themeSchedulerEnableSub: 'Bascule automatiquement entre deux thèmes selon l\'heure ou le thème du système',
   themeSchedulerDayTheme: 'Thème de jour',
   themeSchedulerDayStart: 'Début du jour',
   themeSchedulerNightTheme: 'Thème de nuit',
   themeSchedulerNightStart: 'Début de la nuit',
   themeSchedulerActiveHint: 'Le planificateur de thème est actif - les thèmes changent automatiquement.',
+  themeSchedulerModeLabel: 'Basculer selon',
+  themeSchedulerModeTime: 'Heure',
+  themeSchedulerModeSystem: 'Thème du système',
+  themeSchedulerLightTheme: 'Thème clair',
+  themeSchedulerDarkTheme: 'Thème sombre',
+  themeSchedulerSystemRestartHint: 'Le changement du thème clair/sombre du système prend effet après le redémarrage de l\'application.',
   visualOptionsTitle: 'Options Visuelles',
   coverArtBackground: "Fond d'Art de Poche",
   coverArtBackgroundSub: "Afficher la pochette floutée comme fond dans les en-têtes d'albums et de playlists",

src/locales/hu/settings.ts

@@ -717,12 +717,18 @@ export const settings = {
   seekbarRetrotape: 'Retro szalag',
   themeSchedulerTitle: 'Automatikus témaváltás',
   themeSchedulerEnable: 'Témaütemező engedélyezése',
-  themeSchedulerEnableSub: 'Automatikus váltás két téma között a napszak alapján',
+  themeSchedulerEnableSub: 'Automatikus váltás két téma között a napszak vagy a rendszertéma alapján',
   themeSchedulerDayTheme: 'Nappali téma',
   themeSchedulerDayStart: 'A nappal kezdődik',
   themeSchedulerNightTheme: 'Éjszakai téma',
   themeSchedulerNightStart: 'Az éjszaka kezdődik',
   themeSchedulerActiveHint: 'A témaütemező aktív – a témaváltások automatikusan kezeltek.',
+  themeSchedulerModeLabel: 'Váltás alapja',
+  themeSchedulerModeTime: 'Napszak',
+  themeSchedulerModeSystem: 'Rendszertéma',
+  themeSchedulerLightTheme: 'Világos téma',
+  themeSchedulerDarkTheme: 'Sötét téma',
+  themeSchedulerSystemRestartHint: 'A rendszer világos/sötét beállításának módosítása az alkalmazás újraindítása után lép életbe.',
   visualOptionsTitle: 'Vizuális beállítások',
   coverArtBackground: 'Borító háttér',
   coverArtBackgroundSub: 'Elmosott borító megjelenítése háttérként az album/lejátszási lista fejlécekben',

src/locales/ja/settings.ts

@@ -711,12 +711,18 @@ export const settings = {
   seekbarRetrotape: 'Retro Tape',
   themeSchedulerTitle: 'テーマ自動切り替え',
   themeSchedulerEnable: 'テーマスケジューラーを有効化',
-  themeSchedulerEnableSub: '時刻に基づいて 2 つのテーマを自動で切り替えます',
+  themeSchedulerEnableSub: '時刻またはシステムテーマに基づいて 2 つのテーマを自動で切り替えます',
   themeSchedulerDayTheme: '昼テーマ',
   themeSchedulerDayStart: '昼の開始時刻',
   themeSchedulerNightTheme: '夜テーマ',
   themeSchedulerNightStart: '夜の開始時刻',
   themeSchedulerActiveHint: 'テーマスケジューラーが有効です。テーマ変更は自動で管理されます。',
+  themeSchedulerModeLabel: '切り替え基準',
+  themeSchedulerModeTime: '時刻',
+  themeSchedulerModeSystem: 'システムテーマ',
+  themeSchedulerLightTheme: 'ライトテーマ',
+  themeSchedulerDarkTheme: 'ダークテーマ',
+  themeSchedulerSystemRestartHint: 'システムのライト/ダーク設定の変更は、アプリの再起動後に反映されます。',
   visualOptionsTitle: '表示オプション',
   coverArtBackground: 'カバーアート背景',
   coverArtBackgroundSub: 'アルバム/プレイリストヘッダーの背景にぼかしたカバーアートを表示',

src/locales/nb/settings.ts

@@ -636,12 +636,18 @@ export const settings = {
   seekbarRetrotape: 'Retrotape',
   themeSchedulerTitle: 'Tidsplanlagt tema',
   themeSchedulerEnable: 'Aktiver temaplanlegger',
-  themeSchedulerEnableSub: 'Bytter automatisk mellom to temaer basert på tidspunkt',
+  themeSchedulerEnableSub: 'Bytter automatisk mellom to temaer basert på tidspunkt eller systemtemaet',
   themeSchedulerDayTheme: 'Dagtema',
   themeSchedulerDayStart: 'Dag starter kl.',
   themeSchedulerNightTheme: 'Natttema',
   themeSchedulerNightStart: 'Natt starter kl.',
   themeSchedulerActiveHint: 'Temaplanlegger er aktiv - temaer byttes automatisk.',
+  themeSchedulerModeLabel: 'Bytt basert på',
+  themeSchedulerModeTime: 'Tidspunkt',
+  themeSchedulerModeSystem: 'Systemtema',
+  themeSchedulerLightTheme: 'Lyst tema',
+  themeSchedulerDarkTheme: 'Mørkt tema',
+  themeSchedulerSystemRestartHint: 'Endring av systemets lys/mørk-innstilling trer i kraft etter omstart av appen.',
   visualOptionsTitle: 'Visuelle Alternativer',
   coverArtBackground: 'Cover-bakgrunn',
   coverArtBackgroundSub: 'Vis uskarpt cover som bakgrunn i album/playlist-overskrifter',

src/locales/nl/settings.ts

@@ -637,12 +637,18 @@ export const settings = {
   seekbarRetrotape: 'Retrotape',
   themeSchedulerTitle: 'Thema-planner',
   themeSchedulerEnable: 'Thema-planner inschakelen',
-  themeSchedulerEnableSub: 'Schakelt automatisch tussen twee thema\'s op basis van de tijd',
+  themeSchedulerEnableSub: 'Schakelt automatisch tussen twee thema\'s op basis van de tijd of je systeemthema',
   themeSchedulerDayTheme: 'Dagthema',
   themeSchedulerDayStart: 'Dag begint om',
   themeSchedulerNightTheme: 'Nachtthema',
   themeSchedulerNightStart: 'Nacht begint om',
   themeSchedulerActiveHint: "Thema-planner is actief - thema's worden automatisch gewisseld.",
+  themeSchedulerModeLabel: 'Wisselen op basis van',
+  themeSchedulerModeTime: 'Tijd van de dag',
+  themeSchedulerModeSystem: 'Systeemthema',
+  themeSchedulerLightTheme: 'Licht thema',
+  themeSchedulerDarkTheme: 'Donker thema',
+  themeSchedulerSystemRestartHint: 'Het wijzigen van de licht/donker-instelling van je systeem wordt pas na het herstarten van de app toegepast.',
   visualOptionsTitle: 'Visuele Opties',
   coverArtBackground: 'Cover Achtergrond',
   coverArtBackgroundSub: 'Toon vervaagde cover als achtergrond in album/playlist headers',

src/locales/ro/settings.ts

@@ -652,12 +652,18 @@ export const settings = {
   seekbarRetrotape: 'Bandă Retro',
   themeSchedulerTitle: 'Schimbă Tema automat',
   themeSchedulerEnable: 'Pornește temele programate',
-  themeSchedulerEnableSub: 'Schimbă automat între două teme pe baza orei din zi',
+  themeSchedulerEnableSub: 'Schimbă automat între două teme în funcție de ora din zi sau tema sistemului',
   themeSchedulerDayTheme: 'Temă de zi',
   themeSchedulerDayStart: 'Ziua începe la',
   themeSchedulerNightTheme: 'Temă de noapte',
   themeSchedulerNightStart: 'Noaptea începe la',
   themeSchedulerActiveHint: 'Temele programate sunt active - aceste schimbări de teme sunt gestionate automat.',
+  themeSchedulerModeLabel: 'Comută în funcție de',
+  themeSchedulerModeTime: 'Ora din zi',
+  themeSchedulerModeSystem: 'Tema sistemului',
+  themeSchedulerLightTheme: 'Temă luminoasă',
+  themeSchedulerDarkTheme: 'Temă întunecată',
+  themeSchedulerSystemRestartHint: 'Schimbarea setării luminos/întunecat a sistemului are efect după repornirea aplicației.',
   visualOptionsTitle: 'Opțiuni vizuale',
   coverArtBackground: 'Arta de fundal a copertei',
   coverArtBackgroundSub: 'Arată arta de copertă blurată ca fundal în antetele albumelor/playlisturilor',

src/locales/ru/settings.ts

@@ -737,12 +737,18 @@ export const settings = {
   seekbarRetrotape: 'Ретро-лента',
   themeSchedulerTitle: 'Расписание тем',
   themeSchedulerEnable: 'Включить расписание тем',
-  themeSchedulerEnableSub: 'Автоматически переключается между двумя темами в зависимости от времени суток',
+  themeSchedulerEnableSub: 'Автоматически переключается между двумя темами в зависимости от времени суток или системной темы',
   themeSchedulerDayTheme: 'Дневная тема',
   themeSchedulerDayStart: 'День начинается в',
   themeSchedulerNightTheme: 'Ночная тема',
   themeSchedulerNightStart: 'Ночь начинается в',
   themeSchedulerActiveHint: 'Расписание тем активно - темы переключаются автоматически.',
+  themeSchedulerModeLabel: 'Переключать по',
+  themeSchedulerModeTime: 'Времени суток',
+  themeSchedulerModeSystem: 'Системной теме',
+  themeSchedulerLightTheme: 'Светлая тема',
+  themeSchedulerDarkTheme: 'Тёмная тема',
+  themeSchedulerSystemRestartHint: 'Изменение светлой/тёмной настройки системы вступит в силу после перезапуска приложения.',
   visualOptionsTitle: 'Визуальные Настройки',
   coverArtBackground: 'Фон Обложки',
   coverArtBackgroundSub: 'Показывать размытую обложку как фон в заголовках альбомов и плейлистов',

src/locales/zh/settings.ts

@@ -636,12 +636,18 @@ export const settings = {
   seekbarRetrotape: '复古磁带',
   themeSchedulerTitle: '主题定时切换',
   themeSchedulerEnable: '启用主题定时器',
-  themeSchedulerEnableSub: '根据一天中的时间自动在两个主题之间切换',
+  themeSchedulerEnableSub: '根据一天中的时间或系统主题自动在两个主题之间切换',
   themeSchedulerDayTheme: '白天主题',
   themeSchedulerDayStart: '白天开始时间',
   themeSchedulerNightTheme: '夜晚主题',
   themeSchedulerNightStart: '夜晚开始时间',
   themeSchedulerActiveHint: '主题定时器已启用 - 主题将自动切换。',
+  themeSchedulerModeLabel: '切换依据',
+  themeSchedulerModeTime: '时间',
+  themeSchedulerModeSystem: '系统主题',
+  themeSchedulerLightTheme: '浅色主题',
+  themeSchedulerDarkTheme: '深色主题',
+  themeSchedulerSystemRestartHint: '更改系统的浅色/深色设置需重启应用后生效。',
   visualOptionsTitle: '视觉选项',
   coverArtBackground: '封面背景',
   coverArtBackgroundSub: '在专辑/播放列表标题中显示模糊的封面作为背景',