fix(alarmas-editor): REPETIR eyebrow, grouped card, volume row

Audit 8.5 (t4:381): the "REPETIR" eyebrow above the weekday circles --
never rendered before. New ARB key alarmRepeatSectionLabel.

Audit 8.6 (t4:392-401): the station picker, volume, fade-in and
vacation toggle now share ONE bordered card with sangred divider lines
-- were four separately-spaced widgets. Restyled _CampoSelectorEmisora
as a flat nav row (icon/bold label/muted value/chevron, matching
FilaAjuste's own convention) so it fits inside the card instead of
drawing its own outlined InputDecoration chrome -- used by BOTH the
primary and fallback (Advanced) station fields. Snooze duration, "use
current station", and the Advanced section stay OUTSIDE the card,
exactly where they were (audit 8.8's own documented deliberate
extras). A transparent Material sits inside the card's coloured box so
the fade-in ListTile and the vacation SwitchListTile still paint their
ink/background correctly (the same class of constraint already
documented for PluriGlassSurface elsewhere in this codebase).

Audit 8.7 (t4:396): the volume row is now a compact 112px track with a
live percentage label -- was a bare full-width Slider with no visible
value. New ArtB key alarmVolumeLabel.

Item 8.8 (extra name/type-selector/snooze-selector/"use current
station"/Advanced fields) stays exactly as documented: deliberate,
required by the hard constraint that the editor keep its date field,
fallback-station picker and sound dropdown.

lib/l10n/gen/app_localizations.dart

@@ -2498,6 +2498,12 @@ abstract class AppLocalizations {
   /// **'REPETIR'**
   String get alarmRepeatSectionLabel;
 
+  /// No description provided for @alarmVolumeLabel.
+  ///
+  /// In es, this message translates to:
+  /// **'Volumen'**
+  String get alarmVolumeLabel;
+
   /// No description provided for @androidReliabilityTitle.
   ///
   /// In es, this message translates to:

lib/l10n/gen/app_localizations_ar.dart

@@ -1372,6 +1372,9 @@ class AppLocalizationsAr extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'تكرار';
 
+  @override
+  String get alarmVolumeLabel => 'مستوى الصوت';
+
   @override
   String get androidReliabilityTitle => 'مراجعة موثوقية Android';
 

lib/l10n/gen/app_localizations_bn.dart

@@ -1381,6 +1381,9 @@ class AppLocalizationsBn extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'পুনরাবৃত্তি';
 
+  @override
+  String get alarmVolumeLabel => 'ভলিউম';
+
   @override
   String get androidReliabilityTitle => 'Android নির্ভরযোগ্যতা দেখুন';
 

lib/l10n/gen/app_localizations_de.dart

@@ -1389,6 +1389,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'WIEDERHOLEN';
 
+  @override
+  String get alarmVolumeLabel => 'Lautstärke';
+
   @override
   String get androidReliabilityTitle => 'Android-Zuverlässigkeit prüfen';
 

lib/l10n/gen/app_localizations_en.dart

@@ -1373,6 +1373,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'REPEAT';
 
+  @override
+  String get alarmVolumeLabel => 'Volume';
+
   @override
   String get androidReliabilityTitle => 'Review Android reliability';
 

lib/l10n/gen/app_localizations_es.dart

@@ -1383,6 +1383,9 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'REPETIR';
 
+  @override
+  String get alarmVolumeLabel => 'Volumen';
+
   @override
   String get androidReliabilityTitle => 'Revisar fiabilidad Android';
 

lib/l10n/gen/app_localizations_fr.dart

@@ -1393,6 +1393,9 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'RÉPÉTER';
 
+  @override
+  String get alarmVolumeLabel => 'Volume';
+
   @override
   String get androidReliabilityTitle => 'Vérifier la fiabilité Android';
 

lib/l10n/gen/app_localizations_hi.dart

@@ -1376,6 +1376,9 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'दोहराएं';
 
+  @override
+  String get alarmVolumeLabel => 'आवाज़';
+
   @override
   String get androidReliabilityTitle => 'Android विश्वसनीयता जाँचें';
 

lib/l10n/gen/app_localizations_id.dart

@@ -1384,6 +1384,9 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'ULANGI';
 
+  @override
+  String get alarmVolumeLabel => 'Volume';
+
   @override
   String get androidReliabilityTitle => 'Tinjau keandalan Android';
 

lib/l10n/gen/app_localizations_it.dart

@@ -1392,6 +1392,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'RIPETI';
 
+  @override
+  String get alarmVolumeLabel => 'Volume';
+
   @override
   String get androidReliabilityTitle => 'Controlla affidabilità Android';
 

lib/l10n/gen/app_localizations_ja.dart

@@ -1333,6 +1333,9 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => '繰り返し';
 
+  @override
+  String get alarmVolumeLabel => '音量';
+
   @override
   String get androidReliabilityTitle => 'Androidの信頼性を確認';
 

lib/l10n/gen/app_localizations_pt.dart

@@ -1381,6 +1381,9 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'REPETIÇÃO';
 
+  @override
+  String get alarmVolumeLabel => 'Volume';
+
   @override
   String get androidReliabilityTitle => 'Revisar confiabilidade Android';
 

lib/l10n/gen/app_localizations_ru.dart

@@ -1385,6 +1385,9 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => 'ПОВТОР';
 
+  @override
+  String get alarmVolumeLabel => 'Громкость';
+
   @override
   String get androidReliabilityTitle => 'Проверить надёжность Android';
 

lib/l10n/gen/app_localizations_zh.dart

@@ -1328,6 +1328,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get alarmRepeatSectionLabel => '重复';
 
+  @override
+  String get alarmVolumeLabel => '音量';
+
   @override
   String get androidReliabilityTitle => '检查 Android 可靠性';