fix(alarmas): show which days a weekday alarm actually fires on

The alarms list showed a generic "Días" label for a diasSemana alarm
instead of its actual configured days. Render the real recurrence (e.g.
"Lun, Mié, Vie") by reusing the SAME per-day abbreviation the editor's own
day-picker circles already use -- no new formatting scheme, no new ARB
keys for the days themselves.

Also surface fade/volume/vacation-pause state on the card, each only when
it is a genuinely useful deviation from the common case: a fade badge when
fadeInSegundos > 0 (reusing the existing alarmFadeInLabel key), a volume
percentage when it differs from the 85% default, and a vacation-paused
badge when the alarm is both configured to pause and a vacation range is
currently active (mirrors the exact predicate ServicioProgramacionAlarmas
already uses). One compact line, not a badge per field.

Fixes a text-collision regression in pantalla_alarmas_editor_test.dart:
opening the editor for an alarm whose own day now renders on its card
(e.g. "Lun") made a bare find.text(weekday) ambiguous against the editor's
day-picker circle with the same label -- scoped that finder to the
BottomSheet subtree.

lib/l10n/gen/app_localizations.dart

@@ -3067,6 +3067,12 @@ abstract class AppLocalizations {
   /// In es, this message translates to:
   /// **'Preset: {preset}'**
   String eqCustomActionPresetLabel(String preset);
+
+  /// No description provided for @alarmCardVacationPausedBadge.
+  ///
+  /// In es, this message translates to:
+  /// **'Pausada por vacaciones'**
+  String get alarmCardVacationPausedBadge;
 }
 
 class _AppLocalizationsDelegate