fix(eq): seed device ID at startup and add device management UI

Fix multi-device EQ auto-switching by calling obtenerDispositivoActual()
during cargarPersistido() to seed the initial device ID. Add device
management modal with rename support, EQ preset editing, and connection
status indicator. Translate device UI keys to all 13 locales.

lib/l10n/gen/app_localizations_ru.dart

@@ -1260,4 +1260,24 @@ class AppLocalizationsRu extends AppLocalizations {
   String advancedEqDevicePresetLabel(Object presetName) {
     return 'Пресет: $presetName';
   }
+
+  @override
+  String preNoticeCountdown(int minutes) {
+    return 'Начнётся через $minutes мин';
+  }
+
+  @override
+  String get eqDeviceEditTitle => 'Изменить устройство';
+
+  @override
+  String get eqDeviceNameLabel => 'Название устройства';
+
+  @override
+  String get eqDeviceNameHint => 'Напр.: Колонка в гостиной';
+
+  @override
+  String get eqDeviceNameConfirm => 'Сохранить';
+
+  @override
+  String get eqDeviceConnected => 'Подключено';
 }