fix(bienvenida,grabaciones): headline size, CTA radius, storage caption

Screen 14 / audit 14.3+14.7: welcome headline now 34px/ls-1.2 (was
headlineMedium's 28/ls-1.0), CTA restyled to a radius-18 rounded
rectangle instead of Material 3's default StadiumBorder (t4:696,715).

Screen 12 / audit 12.2+12.3: the recordings storage card now shows the
bold "X of Y used" headline ABOVE a 6px/radius-3 bar, followed by a
real folder-path + purge-policy caption below it -- was the bar first
with the "used" string as its only (small, generic) caption (t4:613).
New ARB key recordingsLibraryStorageFolderCaption, translated to all
13 locales.

Item 12.5 (folder/max-size settings living behind the header action
instead of inline on this screen) is a deliberate structural split
from WU15b; the audit itself scopes it out of this pass.

lib/l10n/gen/app_localizations_id.dart

@@ -444,6 +444,10 @@ class AppLocalizationsId extends AppLocalizations {
     return '$usedMb MB dari $totalMb MB terpakai';
   }
 
+  @override
+  String get recordingsLibraryStorageFolderCaption =>
+      'Music/PluriWave · yang terlama dihapus saat mencapai batas';
+
   @override
   String get recordingsLibraryEmptyTitle => 'Belum ada rekaman';
 
@@ -617,12 +621,20 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get searchMinQualityFilterLabel => 'Kualitas minimum';
 
+  @override
+  String get searchLoadingStationsLabel => 'MENCARI STASIUN…';
+
   @override
   String get searchEmptyTitle => 'Cari stasiun';
 
   @override
   String get searchNoResultsTitle => 'Tidak ada hasil';
 
+  @override
+  String searchNoResultsForQueryTitle(Object query) {
+    return 'Tidak ada hasil untuk \"$query\"';
+  }
+
   @override
   String get searchEmptySubtitle =>
       'Gunakan bilah atas atau chip untuk menemukan sinyal dari seluruh dunia.';
@@ -655,6 +667,9 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get countriesScreenTitle => 'Negara';
 
+  @override
+  String get countriesSearchHint => 'Negara atau kode...';
+
   @override
   String get countriesYourLanguagesTitle => 'Bahasa Anda';
 
@@ -1018,6 +1033,9 @@ class AppLocalizationsId extends AppLocalizations {
     return '$minutes mnt';
   }
 
+  @override
+  String get alarmSnoozeUsualLabel => 'biasa';
+
   @override
   String get saveFavoritesAlarmHint =>
       'Simpan stasiun ke Favorit untuk digunakan sebagai alarm musik.';
@@ -1363,6 +1381,9 @@ class AppLocalizationsId extends AppLocalizations {
     return 'Hari: $days';
   }
 
+  @override
+  String get alarmRepeatSectionLabel => 'ULANGI';
+
   @override
   String get androidReliabilityTitle => 'Tinjau keandalan Android';