feat(queue): show playback source in tech strip with preload tracking

Add source badges for offline, cache, and stream playback in the queue tech line, including localized tooltips across shipped locales.

Track Rust preload-ready events by stream track id and latch the selected source per track, with dev logs to debug preload/source mismatches during next-track handoff.

src/locales/de.ts

@@ -853,6 +853,9 @@ export const deTranslation = {
     rgTrack: 'T {{db}} dB',
     rgAlbum: 'A {{db}} dB',
     rgPeak: 'Peak {{pk}}',
+    sourceOffline: 'Wiedergabe aus der Offline-Bibliothek',
+    sourceHot: 'Wiedergabe aus dem Cache',
+    sourceStream: 'Wiedergabe aus dem Netzwerkstream',
   },
   statistics: {
     title: 'Statistiken',

src/locales/en.ts

@@ -855,6 +855,9 @@ export const enTranslation = {
     rgTrack: 'T {{db}} dB',
     rgAlbum: 'A {{db}} dB',
     rgPeak: 'Peak {{pk}}',
+    sourceOffline: 'Playing from offline library',
+    sourceHot: 'Playing from cache',
+    sourceStream: 'Playing from network stream',
   },
   statistics: {
     title: 'Statistics',

src/locales/es.ts

@@ -856,6 +856,9 @@ export const esTranslation = {
     rgTrack: 'T {{db}} dB',
     rgAlbum: 'A {{db}} dB',
     rgPeak: 'Pico {{pk}}',
+    sourceOffline: 'Reproducción desde la biblioteca sin conexión',
+    sourceHot: 'Reproducción desde la caché',
+    sourceStream: 'Reproducción desde la transmisión en red',
   },
   statistics: {
     title: 'Estadísticas',

src/locales/fr.ts

@@ -851,6 +851,9 @@ export const frTranslation = {
     rgTrack: 'T {{db}} dB',
     rgAlbum: 'A {{db}} dB',
     rgPeak: 'Pic {{pk}}',
+    sourceOffline: 'Lecture depuis la bibliothèque hors ligne',
+    sourceHot: 'Lecture depuis le cache',
+    sourceStream: 'Lecture depuis le flux réseau',
   },
   statistics: {
     title: 'Statistiques',

src/locales/nb.ts

@@ -850,6 +850,9 @@ export const nbTranslation = {
     rgTrack: 'T {{db}} dB',
     rgAlbum: 'A {{db}} dB',
     rgPeak: 'Topp {{pk}}',
+    sourceOffline: 'Spiller fra offlinebibliotek',
+    sourceHot: 'Spiller fra cache',
+    sourceStream: 'Spiller fra nettverksstrøm',
   },
   statistics: {
     title: 'Statistikk',

src/locales/nl.ts

@@ -850,6 +850,9 @@ export const nlTranslation = {
     rgTrack: 'T {{db}} dB',
     rgAlbum: 'A {{db}} dB',
     rgPeak: 'Piek {{pk}}',
+    sourceOffline: 'Afspelen vanuit offlinebibliotheek',
+    sourceHot: 'Afspelen vanuit cache',
+    sourceStream: 'Afspelen vanuit netwerkstream',
   },
   statistics: {
     title: 'Statistieken',

src/locales/ru.ts

@@ -901,6 +901,9 @@ export const ruTranslation = {
     rgTrack: 'Т {{db}} дБ',
     rgAlbum: 'А {{db}} дБ',
     rgPeak: 'Пик {{pk}}',
+    sourceOffline: 'Играет из офлайн-библиотеки',
+    sourceHot: 'Играет из кэша',
+    sourceStream: 'Играет из сетевого потока',
   },
   statistics: {
     title: 'Статистика',

src/locales/zh.ts

@@ -846,6 +846,9 @@ export const zhTranslation = {
     rgTrack: '曲目 {{db}} dB',
     rgAlbum: '专辑 {{db}} dB',
     rgPeak: '峰值 {{pk}}',
+    sourceOffline: '正在从离线库播放',
+    sourceHot: '正在从缓存播放',
+    sourceStream: '正在从网络流播放',
   },
   statistics: {
     title: '统计',