fix(vacaciones): header Add action, info banner, dashed CTA, collapse

Audit 9b.1 (t4:446): a solid brand-teal "Add" header action -- the
prototype's own mid-page CTA (audit 9b.6, still present, now dashed)
is a SECOND, additional entry point, not a replacement.

Audit 9b.2 (t4:448): the teal explanatory banner ("alarms marked
pause-during-vacations won't ring...") is now ALWAYS visible -- never
rendered before. New ARB key vacationExplainerBanner, all 13 locales.

Audit 9b.6 (t4:487): the bottom CTA is now dashed-border with a
date_range glyph -- was a solid OutlinedButton with an add glyph.
Reuses the dashed-painter shape already established in
pantalla_favoritos.dart's custom-station CTA (audit 4.5), duplicated
rather than shared.

Audit 9b.7 (t4:489): "Rangos pasados" is now a collapsible row --
icon, title, count, chevron -- COLLAPSED by default, expanding on tap.
Was always fully expanded inline. Updated the pre-existing widget test
to tap-then-assert instead of asserting immediate visibility.

Item 9b.3 (the eyebrow literally reading "EN CURSO") is NOT
implemented: the eyebrow STYLING is already correct (audit 9b.4), and
the residual copy gap is a shared ARB string
(vacationSummaryActiveCountdown) also used compactly in
pantalla_alarmas.dart's vacation summary row -- diverging its wording
just for this screen's eyebrow, or forcing a shoutier tone into that
other compact usage, is not worth it for a trivial-rated copy nuance.

lib/l10n/app_ar.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "خلال هذه الفترات، لن تُصدر المنبهات المُعلَّمة بـ «إيقاف أثناء الإجازة» صوتًا. أما المُعلَّمة بـ «تشغيل دائمًا» فلن تتأثر.",
   "vacationNoActiveRangeHint": "لا توجد فترة إجازة نشطة الآن.",
   "vacationPastSectionTitle": "الفترات السابقة",
   "vacationRangesCount": "{count} فترة",

lib/l10n/app_bn.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "এই সময়কালে \"ছুটিতে বিরতি\" হিসেবে চিহ্নিত অ্যালার্মগুলো বাজবে না। \"সবসময় বাজবে\" হিসেবে চিহ্নিত অ্যালার্মগুলো প্রভাবিত হবে না।",
   "vacationNoActiveRangeHint": "এই মুহূর্তে কোনো সক্রিয় ছুটির সময়সীমা নেই।",
   "vacationPastSectionTitle": "অতীত সময়সীমা",
   "vacationRangesCount": "{count}টি সময়সীমা",

lib/l10n/app_de.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "Während dieser Zeiträume klingeln Alarme mit der Markierung \"im Urlaub pausieren\" nicht. Als \"immer klingeln\" markierte Alarme sind davon nicht betroffen.",
   "vacationNoActiveRangeHint": "Momentan ist kein aktiver Urlaubszeitraum vorhanden.",
   "vacationPastSectionTitle": "Vergangene Zeiträume",
   "vacationRangesCount": "{count} Zeiträume",

lib/l10n/app_en.arb

@@ -576,6 +576,7 @@
   "vacationUpcomingSectionTitle": "SCHEDULED",
   "vacationPastSectionTitle": "Past ranges",
   "addVacationRangeCta": "Add range",
+  "vacationExplainerBanner": "During these ranges, alarms marked \"pause during vacations\" won't ring. Alarms marked \"always ring\" are not affected.",
   "vacationNoActiveRangeHint": "No active vacation range right now.",
   "vacationsDefaultName": "Vacation",
   "newVacationRangeTitle": "New vacation range",

lib/l10n/app_es.arb

@@ -576,6 +576,7 @@
   "vacationUpcomingSectionTitle": "PROGRAMADOS",
   "vacationPastSectionTitle": "Rangos pasados",
   "addVacationRangeCta": "Añadir rango",
+  "vacationExplainerBanner": "Durante estos rangos no suenan las alarmas marcadas como \"pausar en vacaciones\". Las marcadas como \"sonar siempre\" no se ven afectadas.",
   "vacationNoActiveRangeHint": "No hay un rango de vacaciones activo ahora mismo.",
   "vacationsDefaultName": "Vacaciones",
   "newVacationRangeTitle": "Nuevo rango de vacaciones",

lib/l10n/app_fr.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "Pendant ces periodes, les alarmes marquees \"pause pendant les vacances\" ne sonnent pas. Celles marquees \"toujours sonner\" ne sont pas concernees.",
   "vacationNoActiveRangeHint": "Aucune période de vacances active pour le moment.",
   "vacationPastSectionTitle": "Périodes passées",
   "vacationRangesCount": "{count} périodes",

lib/l10n/app_hi.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "इन अवधियों के दौरान \"छुट्टी में रोकें\" के रूप में चिह्नित अलार्म नहीं बजेंगे। \"हमेशा बजाएं\" के रूप में चिह्नित अलार्म पर कोई असर नहीं पड़ता।",
   "vacationNoActiveRangeHint": "अभी कोई सक्रिय छुट्टी अवधि नहीं है।",
   "vacationPastSectionTitle": "पिछली अवधियां",
   "vacationRangesCount": "{count} अवधियां",

lib/l10n/app_id.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "Selama periode ini, alarm yang ditandai \"jeda saat liburan\" tidak akan berbunyi. Alarm yang ditandai \"selalu berbunyi\" tidak terpengaruh.",
   "vacationNoActiveRangeHint": "Tidak ada periode liburan aktif saat ini.",
   "vacationPastSectionTitle": "Periode lampau",
   "vacationRangesCount": "{count} periode",

lib/l10n/app_it.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "Durante questi periodi le sveglie contrassegnate come \"pausa in vacanza\" non suonano. Quelle contrassegnate come \"suona sempre\" non sono interessate.",
   "vacationNoActiveRangeHint": "Nessun periodo di vacanza attivo al momento.",
   "vacationPastSectionTitle": "Periodi passati",
   "vacationRangesCount": "{count} periodi",

lib/l10n/app_ja.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "この期間中は「休暇中は一時停止」に設定したアラームは鳴りません。「常に鳴らす」に設定したアラームには影響しません。",
   "vacationNoActiveRangeHint": "現在アクティブな休暇期間はありません。",
   "vacationPastSectionTitle": "過去の期間",
   "vacationRangesCount": "{count} 件の期間",

lib/l10n/app_pt.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "Durante esses periodos, os alarmes marcados como \"pausar nas ferias\" nao tocam. Os marcados como \"tocar sempre\" nao sao afetados.",
   "vacationNoActiveRangeHint": "Não há período de férias ativo no momento.",
   "vacationPastSectionTitle": "Períodos passados",
   "vacationRangesCount": "{count} períodos",

lib/l10n/app_ru.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "В эти периоды будильники с пометкой «пауза на время отпуска» не звонят. Будильники с пометкой «звонить всегда» это не затрагивает.",
   "vacationNoActiveRangeHint": "Сейчас нет активного периода отпуска.",
   "vacationPastSectionTitle": "Прошедшие периоды",
   "vacationRangesCount": "{count} периодов",

lib/l10n/app_zh.arb

@@ -788,6 +788,7 @@
       "times": {}
     }
   },
+  "vacationExplainerBanner": "在这些时间段内，标记为“假期暂停”的闹钟不会响铃；标记为“始终响铃”的闹钟不受影响。",
   "vacationNoActiveRangeHint": "目前没有正在生效的假期时间段。",
   "vacationPastSectionTitle": "过往时间段",
   "vacationRangesCount": "{count} 个时间段",

lib/l10n/gen/app_localizations.dart

@@ -2054,6 +2054,12 @@ abstract class AppLocalizations {
   /// **'Añadir rango'**
   String get addVacationRangeCta;
 
+  /// No description provided for @vacationExplainerBanner.
+  ///
+  /// In es, this message translates to:
+  /// **'Durante estos rangos no suenan las alarmas marcadas como \"pausar en vacaciones\". Las marcadas como \"sonar siempre\" no se ven afectadas.'**
+  String get vacationExplainerBanner;
+
   /// No description provided for @vacationNoActiveRangeHint.
   ///
   /// In es, this message translates to:

lib/l10n/gen/app_localizations_ar.dart

@@ -1120,6 +1120,10 @@ class AppLocalizationsAr extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'إضافة فترة';
 
+  @override
+  String get vacationExplainerBanner =>
+      'خلال هذه الفترات، لن تُصدر المنبهات المُعلَّمة بـ «إيقاف أثناء الإجازة» صوتًا. أما المُعلَّمة بـ «تشغيل دائمًا» فلن تتأثر.';
+
   @override
   String get vacationNoActiveRangeHint => 'لا توجد فترة إجازة نشطة الآن.';
 

lib/l10n/gen/app_localizations_bn.dart

@@ -1126,6 +1126,10 @@ class AppLocalizationsBn extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'সময়সীমা যোগ করুন';
 
+  @override
+  String get vacationExplainerBanner =>
+      'এই সময়কালে \"ছুটিতে বিরতি\" হিসেবে চিহ্নিত অ্যালার্মগুলো বাজবে না। \"সবসময় বাজবে\" হিসেবে চিহ্নিত অ্যালার্মগুলো প্রভাবিত হবে না।';
+
   @override
   String get vacationNoActiveRangeHint =>
       'এই মুহূর্তে কোনো সক্রিয় ছুটির সময়সীমা নেই।';

lib/l10n/gen/app_localizations_de.dart

@@ -1128,6 +1128,10 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'Zeitraum hinzufügen';
 
+  @override
+  String get vacationExplainerBanner =>
+      'Während dieser Zeiträume klingeln Alarme mit der Markierung \"im Urlaub pausieren\" nicht. Als \"immer klingeln\" markierte Alarme sind davon nicht betroffen.';
+
   @override
   String get vacationNoActiveRangeHint =>
       'Momentan ist kein aktiver Urlaubszeitraum vorhanden.';

lib/l10n/gen/app_localizations_en.dart

@@ -1120,6 +1120,10 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'Add range';
 
+  @override
+  String get vacationExplainerBanner =>
+      'During these ranges, alarms marked \"pause during vacations\" won\'t ring. Alarms marked \"always ring\" are not affected.';
+
   @override
   String get vacationNoActiveRangeHint => 'No active vacation range right now.';
 

lib/l10n/gen/app_localizations_es.dart

@@ -1125,6 +1125,10 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'Añadir rango';
 
+  @override
+  String get vacationExplainerBanner =>
+      'Durante estos rangos no suenan las alarmas marcadas como \"pausar en vacaciones\". Las marcadas como \"sonar siempre\" no se ven afectadas.';
+
   @override
   String get vacationNoActiveRangeHint =>
       'No hay un rango de vacaciones activo ahora mismo.';

lib/l10n/gen/app_localizations_fr.dart

@@ -1131,6 +1131,10 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'Ajouter une période';
 
+  @override
+  String get vacationExplainerBanner =>
+      'Pendant ces periodes, les alarmes marquees \"pause pendant les vacances\" ne sonnent pas. Celles marquees \"toujours sonner\" ne sont pas concernees.';
+
   @override
   String get vacationNoActiveRangeHint =>
       'Aucune période de vacances active pour le moment.';

lib/l10n/gen/app_localizations_hi.dart

@@ -1121,6 +1121,10 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'अवधि जोड़ें';
 
+  @override
+  String get vacationExplainerBanner =>
+      'इन अवधियों के दौरान \"छुट्टी में रोकें\" के रूप में चिह्नित अलार्म नहीं बजेंगे। \"हमेशा बजाएं\" के रूप में चिह्नित अलार्म पर कोई असर नहीं पड़ता।';
+
   @override
   String get vacationNoActiveRangeHint => 'अभी कोई सक्रिय छुट्टी अवधि नहीं है।';
 

lib/l10n/gen/app_localizations_id.dart

@@ -1125,6 +1125,10 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'Tambahkan periode';
 
+  @override
+  String get vacationExplainerBanner =>
+      'Selama periode ini, alarm yang ditandai \"jeda saat liburan\" tidak akan berbunyi. Alarm yang ditandai \"selalu berbunyi\" tidak terpengaruh.';
+
   @override
   String get vacationNoActiveRangeHint =>
       'Tidak ada periode liburan aktif saat ini.';

lib/l10n/gen/app_localizations_it.dart

@@ -1130,6 +1130,10 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'Aggiungi periodo';
 
+  @override
+  String get vacationExplainerBanner =>
+      'Durante questi periodi le sveglie contrassegnate come \"pausa in vacanza\" non suonano. Quelle contrassegnate come \"suona sempre\" non sono interessate.';
+
   @override
   String get vacationNoActiveRangeHint =>
       'Nessun periodo di vacanza attivo al momento.';

lib/l10n/gen/app_localizations_ja.dart

@@ -1088,6 +1088,10 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get addVacationRangeCta => '期間を追加';
 
+  @override
+  String get vacationExplainerBanner =>
+      'この期間中は「休暇中は一時停止」に設定したアラームは鳴りません。「常に鳴らす」に設定したアラームには影響しません。';
+
   @override
   String get vacationNoActiveRangeHint => '現在アクティブな休暇期間はありません。';
 

lib/l10n/gen/app_localizations_pt.dart

@@ -1124,6 +1124,10 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'Adicionar período';
 
+  @override
+  String get vacationExplainerBanner =>
+      'Durante esses periodos, os alarmes marcados como \"pausar nas ferias\" nao tocam. Os marcados como \"tocar sempre\" nao sao afetados.';
+
   @override
   String get vacationNoActiveRangeHint =>
       'Não há período de férias ativo no momento.';

lib/l10n/gen/app_localizations_ru.dart

@@ -1126,6 +1126,10 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get addVacationRangeCta => 'Добавить период';
 
+  @override
+  String get vacationExplainerBanner =>
+      'В эти периоды будильники с пометкой «пауза на время отпуска» не звонят. Будильники с пометкой «звонить всегда» это не затрагивает.';
+
   @override
   String get vacationNoActiveRangeHint =>
       'Сейчас нет активного периода отпуска.';

lib/l10n/gen/app_localizations_zh.dart

@@ -1084,6 +1084,10 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get addVacationRangeCta => '添加时间段';
 
+  @override
+  String get vacationExplainerBanner =>
+      '在这些时间段内，标记为“假期暂停”的闹钟不会响铃；标记为“始终响铃”的闹钟不受影响。';
+
   @override
   String get vacationNoActiveRangeHint => '目前没有正在生效的假期时间段。';