feat(ui): design token discipline, accessibility and i18n pass

- Replace all hardcoded Color literals outside lib/tema with theme tokens (new static brand palette in PluriWaveTokens); media notification uses the brand color instead of the Material default purple
- Favorite button on station cards grows to a 48dp target and becomes an independent semantics node for screen readers (Semantics container fix)
- All flutter_animate call sites route through the PluriAnimate reduced-motion gate (zero direct .animate() left)
- Locale-aware short dates via intl DateFormat (new lib/l10n/formato_fechas.dart) replacing the hardcoded DD/MM/YYYY; proper plural messages for the favorites counter; example stream URL as a localized key - all 13 locales
- Rounded shimmer placeholders matching card radii; shimmer loading state in search instead of a bare spinner; rounded icon variants unified in settings; bottom-sheet conventions on the custom station form
- Fix latent debug crash: vacation editor read AppLocalizations in initState
- 11 new tests (121 total green), flutter analyze clean

lib/l10n/gen/app_localizations.dart

@@ -2245,6 +2245,30 @@ abstract class AppLocalizations {
   /// In es, this message translates to:
   /// **'Dom'**
   String get weekdayShortSunday;
+
+  /// No description provided for @stationCount.
+  ///
+  /// In es, this message translates to:
+  /// **'{count, plural, =1{1 emisora} other{{count} emisoras}}'**
+  String stationCount(int count);
+
+  /// No description provided for @alarmIconLabel.
+  ///
+  /// In es, this message translates to:
+  /// **'Alarma musical'**
+  String get alarmIconLabel;
+
+  /// No description provided for @vacationIconLabel.
+  ///
+  /// In es, this message translates to:
+  /// **'Modo vacaciones'**
+  String get vacationIconLabel;
+
+  /// No description provided for @streamUrlHint.
+  ///
+  /// In es, this message translates to:
+  /// **'https://stream.example.com:8000/radio'**
+  String get streamUrlHint;
 }
 
 class _AppLocalizationsDelegate

lib/l10n/gen/app_localizations_ar.dart

@@ -1203,4 +1203,26 @@ class AppLocalizationsAr extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'الأحد';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count محطة',
+      few: '$count محطات',
+      two: 'محطتان',
+      one: 'محطة واحدة',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'منبه موسيقي';
+
+  @override
+  String get vacationIconLabel => 'وضع الإجازة';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_bn.dart

@@ -1212,4 +1212,24 @@ class AppLocalizationsBn extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'রবি';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$countটি স্টেশন',
+      one: '১টি স্টেশন',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'মিউজিক অ্যালার্ম';
+
+  @override
+  String get vacationIconLabel => 'ছুটির মোড';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_de.dart

@@ -1222,4 +1222,24 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'So';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count Sender',
+      one: '1 Sender',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'Musikwecker';
+
+  @override
+  String get vacationIconLabel => 'Urlaubsmodus';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_en.dart

@@ -1208,4 +1208,24 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'Sun';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count stations',
+      one: '1 station',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'Musical alarm';
+
+  @override
+  String get vacationIconLabel => 'Vacation mode';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_es.dart

@@ -1217,4 +1217,24 @@ class AppLocalizationsEs extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'Dom';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count emisoras',
+      one: '1 emisora',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'Alarma musical';
+
+  @override
+  String get vacationIconLabel => 'Modo vacaciones';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_fr.dart

@@ -1227,4 +1227,24 @@ class AppLocalizationsFr extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'Dim';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count stations',
+      one: '1 station',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'Alarme musicale';
+
+  @override
+  String get vacationIconLabel => 'Mode vacances';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_hi.dart

@@ -1211,4 +1211,24 @@ class AppLocalizationsHi extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'रवि';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count स्टेशन',
+      one: '1 स्टेशन',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'संगीत अलार्म';
+
+  @override
+  String get vacationIconLabel => 'अवकाश मोड';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_id.dart

@@ -1217,4 +1217,23 @@ class AppLocalizationsId extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'Min';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count stasiun',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'Alarm musik';
+
+  @override
+  String get vacationIconLabel => 'Mode liburan';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_it.dart

@@ -1222,4 +1222,24 @@ class AppLocalizationsIt extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'Dom';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count stazioni',
+      one: '1 stazione',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'Sveglia musicale';
+
+  @override
+  String get vacationIconLabel => 'Modalità vacanza';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_ja.dart

@@ -1173,4 +1173,23 @@ class AppLocalizationsJa extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => '日';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count局',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'ミュージックアラーム';
+
+  @override
+  String get vacationIconLabel => '休暇モード';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_pt.dart

@@ -1214,4 +1214,24 @@ class AppLocalizationsPt extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'Dom';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count estações',
+      one: '1 estação',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'Alarme musical';
+
+  @override
+  String get vacationIconLabel => 'Modo férias';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_ru.dart

@@ -1217,4 +1217,25 @@ class AppLocalizationsRu extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => 'Вс';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count станций',
+      few: '$count станции',
+      one: '$count станция',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => 'Музыкальный будильник';
+
+  @override
+  String get vacationIconLabel => 'Режим отпуска';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }

lib/l10n/gen/app_localizations_zh.dart

@@ -1168,4 +1168,23 @@ class AppLocalizationsZh extends AppLocalizations {
 
   @override
   String get weekdayShortSunday => '周日';
+
+  @override
+  String stationCount(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count 个电台',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String get alarmIconLabel => '音乐闹钟';
+
+  @override
+  String get vacationIconLabel => '假期模式';
+
+  @override
+  String get streamUrlHint => 'https://stream.example.com:8000/radio';
 }