merge: incorporate main's safearea/auto-order/vacaciones fixes

lib/pantallas/pantalla_vacaciones.dart

@@ -842,10 +842,38 @@ class _EditorVacacionesSheetState extends State<_EditorVacacionesSheet> {
               ],
             ),
             const SizedBox(height: 16),
-            FilledButton.icon(
-              onPressed: _guardar,
-              icon: const Icon(Icons.check_rounded),
-              label: Text(l10n.saveRangeAction),
+            Row(
+              children: [
+                Expanded(
+                  child: FilledButton.icon(
+                    onPressed: _guardar,
+                    icon: const Icon(Icons.check_rounded),
+                    label: Text(l10n.saveRangeAction),
+                  ),
+                ),
+                // Fix `vacaciones-delete`: only when EDITING an existing
+                // range (never when creating one -- there is nothing to
+                // delete yet). Reuses the exact same confirmation dialog
+                // (`_confirmarEliminarRango`) and deletion method
+                // (`eliminarRangoVacaciones`) the swipe-to-delete gesture
+                // already uses on both `_HeroRangoActivo` and
+                // `_TarjetaRangoVacaciones` -- no new deletion path.
+                if (widget.rango != null) ...[
+                  const SizedBox(width: 10),
+                  OutlinedButton.icon(
+                    key: const ValueKey('vacation-delete-button'),
+                    style: OutlinedButton.styleFrom(
+                      foregroundColor: Theme.of(context).colorScheme.error,
+                      side: BorderSide(
+                        color: Theme.of(context).colorScheme.error,
+                      ),
+                    ),
+                    onPressed: _eliminar,
+                    icon: const Icon(Icons.delete_outline_rounded),
+                    label: Text(l10n.deleteAction),
+                  ),
+                ],
+              ],
             ),
           ],
         ),
@@ -903,6 +931,21 @@ class _EditorVacacionesSheetState extends State<_EditorVacacionesSheet> {
     }
     if (mounted) Navigator.pop(context);
   }
+
+  /// Fix `vacaciones-delete`: mirrors `_guardar`'s pop-on-success shape,
+  /// but confirms first (via the same `_confirmarEliminarRango` dialog the
+  /// swipe gesture uses) and calls `eliminarRangoVacaciones` instead of
+  /// saving. Only reachable when [widget.rango] is non-null (the delete
+  /// button itself is hidden otherwise).
+  Future<void> _eliminar() async {
+    final rango = widget.rango;
+    if (rango == null) return;
+    final l10n = AppLocalizations.of(context);
+    final confirmado = await _confirmarEliminarRango(context, l10n);
+    if (!confirmado || !mounted) return;
+    await context.read<EstadoAlarmas>().eliminarRangoVacaciones(rango.id);
+    if (mounted) Navigator.pop(context);
+  }
 }
 
 class _PickerButton extends StatelessWidget {